Caterpillar - Troubleshooting For c175-16 & c175-20 Engines For Caterpillar Built Machines
Caterpillar - Troubleshooting For c175-16 & c175-20 Engines For Caterpillar Built Machines
Caterpillar - Troubleshooting For c175-16 & c175-20 Engines For Caterpillar Built Machines
Troubleshooting
Preliminary Information
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The meaning of this safety alert symbol is as follows: Attention! Become Alert! Your Safety is Involved. The message that appears under the warning explains the hazard and can be either written or pictorially presented. Operations that may cause product damage are identied by NOTICE labels on the product and in this publication. Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard. The warnings in this publication and on the product are, therefore, not all inclusive. If a tool, procedure, work method or operating technique that is not specically recommended by Caterpillar is used, you must satisfy yourself that it is safe for you and for others. You should also ensure that the product will not be damaged or be made unsafe by the operation, lubrication, maintenance or repair procedures that you choose. The information, specications, and illustrations in this publication are on the basis of information that was available at the time that the publication was written. The specications, torques, pressures, measurements, adjustments, illustrations, and other items can change at any time. These changes can affect the service that is given to the product. Obtain the complete and most current information before you start any job. Caterpillar dealers have the most current information available.
When replacement parts are required for this product Caterpillar recommends using Caterpillar replacement parts or parts with equivalent specications including, but not limited to, physical dimensions, type, strength and material. Failure to heed this warning can lead to premature failures, product damage, personal injury or death.
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3 Table of Contents
Table of Contents
Troubleshooting Section
Introduction General Information ................................................ 4 Welding Precaution ................................................. 4 Electronic Service Tools .......................................... 5 Electronic System Overview Component Location ............................................... 9 Engine Monitoring System .................................... 14 Diagnostic Capabilities ......................................... 14 Electrical Connectors ............................................ 16 Wiring Information ................................................. 18 Conguration Parameters Conguration Parameters ..................................... 20 Diagnostic Trouble Codes Diagnostic Trouble Codes ..................................... 22 Event Codes Event Codes ........................................................ 30 Symptom Troubleshooting Symptom Troubleshooting .................................... 39 Alternator Problem (Charging Problem and/or Noisy Operation) ........................................................... 39 Coolant Contains Fuel .......................................... 40 Coolant Contains Oil ............................................. 40 Coolant Pressure Is Low ....................................... 41 Coolant Temperature Is High ................................ 42 Coolant Temperature Is Low ................................. 44 Crankcase Pressure Is High ................................. 45 ECM Does Not Communicate with Other Modules .............................................................. 46 Engine Cranks but Does Not Start ........................ 46 Engine Does Not Crank ........................................ 49 Engine Has Mechanical Noise (Knock) ................ 50 Engine Misres, Runs Rough or Is Unstable ........ 50 Engine Overspeeds .............................................. 52 Engine Top Speed Is Not Obtained ...................... 53 Engine Vibration Is Excessive .............................. 53 Exhaust Has Excessive Black Smoke .................. 54 Exhaust Has Excessive White Smoke .................. 55 Fuel Filter Is Restricted ......................................... 56 Fuel Pressure Is High ........................................... 57 Fuel Pressure Is Low ............................................ 57 Fuel Rail Pressure Is High .................................... 59 Fuel Rail Pressure Is Low ..................................... 60 Fuel Temperature Is High ..................................... 61 Fuel Transfer Pump Inlet Pressure Is Low ............ 62 Inlet Air Is Restricted ............................................. 63 Intake Manifold Air Temperature Is High ............... 64 Oil Consumption Is Excessive .............................. 65 Oil Contains Coolant ............................................. 65 Oil Contains Fuel .................................................. 66 Oil Filter Differential Pressure Problem ................ 66 Oil Pressure Is Low ............................................... 67 Oil Temperature Is High ........................................ 68
Power Is Intermittently Low or Power Cutout Is Intermittent .......................................................... Prelubrication Pump Problem ............................... Turbocharger Turbine Temperature Is High .......... Valve Lash Is Excessive ....................................... Valve Rotator or Spring Lock Is Free ....................
69 70 71 72 73
Circuit Tests Coolant Level - Test .............................................. 74 Data Link - Test ..................................................... 81 Electrical Power Supply - Test .............................. 89 Ether Starting Aid - Test ........................................ 96 Fuel Priming Pump - Test ................................... 104 Fuel Rail Pressure - Test ..................................... 111 Injector Solenoid - Test ....................................... 120 Oil Renewal - Test ............................................... 137 Prelubrication - Test ............................................ 143 Sensor Signal (Analog, Active) - Test ................. 152 Sensor Signal (Analog, Passive) - Test .............. 164 Sensor Signal (PWM) - Test ............................... 173 Sensor Supply - Test ........................................... 181 Shutdown - Test .................................................. 192 Speed/Timing - Test ............................................ 197 Service Factory Passwords ............................................. ECM Will Not Accept Factory Passwords ........... Electronic Service Tool Does Not Communicate .. Test ECM Mode .................................................. Injector Trim File - Install ..................................... ECM Software - Install ........................................ ECM - Congure ................................................. ECM - Replace ................................................... Electrical Connectors - Inspect ........................... 207 207 208 212 213 213 214 215 216
Index Section
Index ................................................................... 221
4 Troubleshooting Section
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NOTICE Do not ground the welder to electrical components such as the ECM or sensors. Improper grounding can cause damage to the drive train bearings, hydraulic components, electrical components, and other components. Clamp the ground cable from the welder to the component that will be welded. Place the clamp as close as possible to the weld. This will help reduce the possibility of damage. 1. Stop the engine. Remove the electrical power from the ECM. 2. Disconnect the negative battery cable from the battery. If a battery disconnect switch is installed, open the switch.
General Information
SMCS Code: 1000 As a reference, simplied schematics for each of the engines subsystems are included with each of the circuit tests that are in this manual. For an accurate representation of the entire electrical schematic that is for your application, refer to the Electrical System Schematic. During troubleshooting, inspect all harness connections before any component is replaced. If these connections are not clean and tight, continuous electrical problems or intermittent electrical problems can result. Check that the wires are pushed into the connectors completely. Make sure that the connections are tight before other tests are made. Failure of an electrical component may cause the failure of other components. Always attempt to correct the cause of an electrical failure before you replace a component. If wire insulation is punctured, repair the damage. Seal the damaged wires with 8T-0065 Silicone Sealant. Cover the sealant with two layers of 1P-0810 Electrical Tape.
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Welding Precaution
SMCS Code: 1000 Proper welding procedures are necessary in order to avoid damage to the engines electronic control module, to sensors, and to associated components. Remove the component that requires welding. When welding on a engine that is equipped with an Electronic Control Module (ECM) and removal of the component is not possible, the following procedure must be followed. This procedure provides the minimum amount of risk to the electronic components.
Illustration 1 Service welding guide (typical diagram)
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3. Connect the welding ground cable as close as possible to the area that will be welded. Components which may be damaged by welding include bearings, hydraulic components, and electrical/electronic components. 4. Protect the wiring harness from welding debris and from spatter. 5. Weld the materials by using standard welding methods.
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5 Troubleshooting Section
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Table 2
Optional Service Tools Description Digital Pressure Indicator Engine Pressure Group Crimp Tool (4AWG TO 10AWG) Battery Load Tester Voltage Tester Temperature Adapter (MULTIMETER) Connector Tool Group AC/DC Current Probe Multi-Tool Gp
Information access System diagnostics System calibrations System congurations Data link communications
Refer to Special Instructions, SEHS9249, Use of 4C-4911 Battery Load Tester for 6, 8, and 12 Volt Lead Acid Batteries and Special Instructions, SEHS7633, Battery Test Procedure. (2) Refer to Special Instructions, SEHS8382, Use of the 6V-9130 Temperature Adapter Group.
Required Service Tools Part Number N/A 6V-2197 7X-1171 7X-1695 146-4080 7X-1710 7X-6370 208-0059 257-8718 167-9225 1U-5804 175-3700 Description 4 mm Allen Wrench Magnetic Transducer As Transducer Adapter Cable As Digital Multimeter Gp (RS232) Multimeter Probes Adapter Cable As (3-PIN BREAKOUT) Adapter Cable As (70-PIN BREAKOUT) Adapter Cable As (120-PIN BREAKOUT) Harness (SERVICE TOOL ADAPTER) Crimp Tool (12AWG TO 18AWG) Connector Repair Kit (DEUTSCH DT)
Diagnostic tests Calibrations Flash programming Conguration of the Electronic Control Module
(ECM) Table 3 lists the software that is required in order to use Cat ET. Always use the latest version of Cat ET that is available.
Two short jumper wires are needed to check the continuity of some wiring harness circuits by shorting two adjacent terminals together in a connector. A long extension wire may also be needed to check the continuity of some wiring harness circuits.
6 Troubleshooting Section
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Table 3
Software Requirements for Cat ET Part Number JERD2124 JERD2129 Description Single user license for Cat ET Data subscription for all engines and machines
Note: For more information regarding the use of Cat ET and the PC requirements for Cat ET, refer to the documentation that accompanies your Cat ET software.
Standard Hardware for the Use of Cat ET Part Number N/A 275-5120 237-7547(3)
(3)
Connecting the Communication Adapter II (1) (2) (3) (4) (5) Personal Computer (PC) 237-7547 Adapter Cable As 196-0055 Adapter Cable As 275-5121 Communication Adapter As 207-6845 Adapter Cable As
Description Personal Computer (PC) Communication Adapter Gp (CAT ET TO ECM INTERFACE) Adapter Cable As
Note: Items (3), (4), and (5) are part of the 275-5120 Communication Adapter Gp. Use the following procedure in order to connect Cat ET and the communication adapter. 1. Remove the electrical power from the ECM. 2. Connect communication adapter (4) to a communications port on the PC by using one of the following methods: a. Connect adapter cable (3) between the COMPUTER end of communication adapter (4) and the RS232 serial port of PC (1). b. Connect adapter cables (2) and (3) between the COMPUTER end of communication adapter (4) and the USB port of PC (1). 3. Connect adapter cable (5) to communication adapter (4). 4. Connect adapter cable (5) to a service tool connector. 5. Restore electrical power to the ECM. Attempt to connect Cat ET to the ECM on the application. If Cat ET indicates that there is more than one ECM on the vehicle, select the engine ECM.
The 237-7547 Adapter Cable As is required to connect to the Universal Serial Bus (USB) on computers that are not equipped with a RS232 serial port.
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7 Troubleshooting Section
Observe the communication adapter and Cat ET. If the J1939 / DeviceNet and the Cat Data Link indicators are ashing and Cat ET does not display a message that indicates Service tool support is limited, Cat ET is communicating with the ECM on both data links. Refer to Troubleshooting, Electronic Service Tool Does Not Communicate if any of the following conditions exist:
Cat Data Link indicator are not ashing. Both indicators must be ashing. communication problem.
Cat ET displays a message that refers to a Cat ET displays a Error #142 The interface
hardware is not responding message.
8 Troubleshooting Section
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Component Location
SMCS Code: 1000; 1900
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9 Troubleshooting Section
Block Diagram
Illustration 3
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10 Troubleshooting Section
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Illustration 4 Locations of the engine sensors (typical right side engine view) (1) Filtered oil temperature sensor (2) Filtered oil pressure sensor (3) Unltered oil pressure sensor (4) Crankcase pressure sensor (5) Fuel transfer pump inlet pressure sensor (6) Power module (7) High pressure fuel temperature sensor (8) Fuel control valve (9) Connector for the oil renewal solenoid (10) Unltered fuel pressure sensor
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(11) Filtered fuel pressure sensor (12) Electric fuel priming pump (13) Water in fuel sensor (14) Connector for the prelube pump
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11 Troubleshooting Section
Illustration 5 Locations of the engine sensors (typical top side engine view) (15) Right primary camshaft engine speed/timing sensor (16) Left secondary camshaft engine epeed/timing sensor (17) Sensor for the right turbocharger turbine inlet temperature (18) Sensor for the left turbocharger turbine inlet temperature (19) Fuel rail pressure sensor (20) Right intake manifold air temperature sensor (21) Left intake manifold pressure sensor
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(22) Right intake manifold pressure sensor (23) Left intake manifold air temperature sensor
12 Troubleshooting Section
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Illustration 6 Locations of the engine sensors (typical left side engine view) (24) Machine interface connector (25) Connector for the ground level shutdown switch (26) Upper oil level switch (27) Lower oil level switch
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(28) Location of the crankshaft speed/timing sensor (29) Sensor for the machine tachometer
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13 Troubleshooting Section
Illustration 7 Locations of the engine sensors (front side engine view) (30) Coolant pump outlet pressure sensor (30) Engine block outlet coolant tempeature sensor (31) Atmospheric pressure sensor
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14 Troubleshooting Section
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1. Select the Service/Monitoring System screen on Cat ET. 2. Highlight the desired parameter. Then click on the Change button in the lower left corner of the screen. The Change Monitor System screen will appear. 3. Change the State of the parameter. 4. Set the Trip Point and the Delay Time according to the Allowed Values that are displayed in the lower half of the screen. 5. Click the OK button. If a password is required, the Enter Passwords screen will appear. Enter the correct passwords and then click the OK button. Note: If a factory password is required, the Enter Factory Passwords screen will appear. Refer to Troubleshooting, Factory Passwords for information that is related to obtaining factory passwords. The new settings will be effective immediately.
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Indicators (1), (2), and (3) Warning Category Indicator (1) (2) (3) Severity Least Severe Moderate Severity Most Severe
Use Caterpillar Electronic Technician (ET) to perform the following activities for the monitoring system:
Diagnostic Capabilities
SMCS Code: 1900
Diagnostic Codes
The engines Electronic Control Module (ECM) has the ability to monitor the circuitry between the ECM and the engines components. The ECM also has the ability to monitor the engines operating conditions. If the ECM detects a problem, a code is generated. There are two categories of codes:
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15 Troubleshooting Section
Troubleshooting, Diagnostic Trouble Code List Troubleshooting, Event Code List Logged Codes
The codes are logged and stored in the ECM memory. The problem may have been repaired and/or the problem may no longer exist. If the system is powered, it is possible to generate an active diagnostic code whenever a component is disconnected. If the component is reconnected, the code is no longer active but the code may become logged. Logged codes may not indicate that a repair is needed. The problem may have been temporary. Logged codes may be useful to help troubleshoot intermittent problems. Logged codes can also be used to review the performance of the engine and of the electronic system.
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Electrical Connectors
SMCS Code: 7553-WW
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Illustration 8 Locations of the components at the ECM (1) P2 ECM connector (ECM side) (2) P1 ECM connector (ECM side) (3) P2 ECM connector (harness side) (4) P1 ECM connector (harness side) (5) A4 ECM
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17 Troubleshooting Section
Rail Connectors
Illustration 11 Illustration 9 Locations of the rail connectors at the ECM panel (6) Right rail connector (7) Left rail connector
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Terminal locations for the rail connectors (70-pin connector) (8) Connector for the engine harness (9) Connector for the ECM harness
20 Cylinder Engines
Illustration 10 Locations of the rail connectors at the ECM panel (6) Right rail connector (7) Left rail connector
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Illustration 12
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Terminal locations for the machine interface connectors (40-pin connector) (10) Connector for the engine harness (11) Connector for the machine harness
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Injector Connectors
Illustration 13
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Sensor Connectors
Illustration 17
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Illustration 18
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Wiring Information
SMCS Code: 1408 The wiring schematics are revised periodically. The wiring schematics will change as updates are made to the engines harness. For the most current information, always check the revision number of the schematic. Use the schematic with the latest revision number.
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19 Troubleshooting Section
Color Codes for the Harness Wire Color Code BK BR RD OR YL Color Black Brown Red Orange Yellow Color Code GN BU PU GY WH PK Color Green Blue Purple Gray White Pink
For example, a wire identication of A701-GY on the schematic would signify a gray wire with the circuit number A701.
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Conguration Parameters
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Table 7
Conguration Parameters
SMCS Code: 1900 System conguration parameters are parameters that affect emissions, power of the engine, and other features that dene the characteristics of the engine subsystems. The parameters are preprogrammed at the factory. You may need to reprogram the system conguration parameters if the Electronic Control Module (ECM) is replaced and/or if you reprogram the engine rating. You do not need to reprogram the system conguration parameters if you replace the ash le. Caterpillar Electronic Technician (ET) can be used to view the values for these parameters at any time. Certain system conguration parameters are stamped on the engine information plate. Note: The unauthorized tampering with the parameters that are protected by factory passwords may cause your Caterpillar warranty to be voided. The system conguration parameters are listed in Table 7.
ECM Identication Parameters Equipment ID(1) Engine Serial Number(1) ECM Part Number(2) ECM Serial Number (2) Software Group Part Number (2) Software Group Release Date (2) Software Group Description (2) 17 alphanumeric characters 0XX00000 or XXX00000 Read Only Read Only Software Dependent Software Dependent Software Dependent
Engine Conguration Parameters Ether Solenoid Conguration (1) Oil Renewal Rate Engine Prelube Desired Engine Coolant Temperature Conguration Continuous Flow 0 Enabled 78 C (172 F)
System Settings FLS (Full Load Setting) (1) FTS (Full Torque Setting) (1) Programmed at the factory Programmed at the factory
Read Only
The parameter must be reprogrammed if the ECM is replaced. This parameter can only be viewed. No changes are allowed.
Parameter Descriptions
ECM Identication Parameters
Equipment ID Equipment ID allows the customer to enter a description into the ECM in order to identify the installation. A maximum of 17 characters may be entered in the eld. This parameter is only for reference by the customer. This parameter is not required. Engine Serial Number Program the Engine Serial Number to match the engine serial number that is stamped on the engine information plate.
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21 Troubleshooting Section
Note: When you are requesting factory passwords, always use the engine serial number that is resident in the ECM. ECM Part Number This parameter identies the part number of the ECM. ECM Serial Number The ECM Serial Number is stored in the memory of the ECM. The ECM Serial Number can be accessed by the use of Cat ET. Software Group Part Number This parameter identies the part number of the ash le that is currently installed in the ECM. Software Group Release Date This parameter identies the release date of the ash le that is currently installed in the ECM. Software Group Description This parameter identies the description of the application for the ash le that is currently installed in the ECM.
System Settings
Full Load Setting (FLS) FLS is a parameter that represents the adjustment to the fuel system that was made at the factory in order to ne tune the fuel system. The correct value for this parameter is stamped on the engine information plate. Only change this value if the engine is rerated or if a new ECM has been installed. Factory passwords are required to change this parameter. Full Torque Setting (FTS) FTS is similar to FLS. Only change this value if the engine is rerated or if a new ECM has been installed. Factory passwords are required to change this parameter.
Parameter Worksheet
Table 8
ECM Identication Parameters Equipment ID Engine Serial Number ECM Part Number ECM Serial Number Software Group Part Number Software Group Release Date Software Group Description Engine Conguration Parameters Ether Solenoid Conguration Oil Renewal Rate Engine Prelube Desired Engine Coolant Temperature Conguration System Settings FLS (Full Load Setting) FTS (Full Torque Setting) Security Access Parameters Total Tattletale
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Cross-Reference from CID-FMI Code to the Appropriate Test Procedure Diagnostic Code and Description 1-2 Cylinder #1 Injector erratic, intermittent, or incorrect 1-5 Cylinder #1 Injector current below normal 1-6 Cylinder #1 Injector current above normal 1-7 Cylinder #1 Injector not responding properly 2-2 Cylinder #2 Injector erratic, intermittent, or incorrect 2-5 Cylinder #2 Injector current below normal 2-6 Cylinder #2 Injector current above normal 2-7 Cylinder #2 Injector not responding properly 3-2 Cylinder #3 Injector erratic, intermittent, or incorrect 3-5 Cylinder #3 Injector current below normal 3-6 Cylinder #3 Injector current above normal 3-7 Cylinder #3 Injector not responding properly 4-2 Cylinder #4 Injector erratic, intermittent, or incorrect 4-5 Cylinder #4 Injector current below normal 4-6 Cylinder #4 Injector current above normal 4-7 Cylinder #4 Injector not responding properly 5-2 Cylinder #5 Injector erratic, intermittent, or incorrect 5-5 Cylinder #5 Injector current below normal 5-6 Cylinder #5 Injector current above normal 5-7 Cylinder #5 Injector not responding properly 6-2 Cylinder #6 Injector erratic, intermittent, or incorrect 6-5 Cylinder #6 Injector current below normal 6-6 Cylinder #6 Injector current above normal 6-7 Cylinder #6 Injector not responding properly Troubleshooting Procedure Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test
(continued)
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23 Troubleshooting Section
(Table 9, contd)
Cross-Reference from CID-FMI Code to the Appropriate Test Procedure Diagnostic Code and Description 7-2 Cylinder #7 Injector erratic, intermittent, or incorrect 7-5 Cylinder #7 Injector current below normal 7-6 Cylinder #7 Injector current above normal 7-7 Cylinder #7 Injector not responding properly 8-2 Cylinder #8 Injector erratic, intermittent, or incorrect 8-5 Cylinder #8 Injector current below normal 8-6 Cylinder #8 Injector current above normal 8-7 Cylinder #8 Injector not responding properly 9-2 Cylinder #9 Injector erratic, intermittent, or incorrect 9-5 Cylinder #9 Injector current below normal 9-6 Cylinder #9 Injector current above normal 9-7 Cylinder #9 Injector not responding properly 10-2 Cylinder #10 Injector erratic, intermittent, or incorrect 10-5 Cylinder #10 Injector current below normal 10-6 Cylinder #10 Injector current above normal 10-7 Cylinder #10 Injector not responding properly 11-2 Cylinder #11 Injector erratic, intermittent, or incorrect 11-5 Cylinder #11 Injector current below normal 11-6 Cylinder #11 Injector current above normal 11-7 Cylinder #11 Injector not responding properly 12-2 Cylinder #12 Injector erratic, intermittent, or incorrect 12-5 Cylinder #12 Injector current below normal 12-6 Cylinder #12 Injector current above normal 12-7 Cylinder #12 Injector not responding properly 13-2 Cylinder #13 Injector erratic, intermittent, or incorrect 13-5 Cylinder #13 Injector current below normal 13-6 Cylinder #13 Injector current above normal 13-7 Cylinder #13 Injector not responding properly 14-2 Cylinder #14 Injector erratic, intermittent, or incorrect 14-5 Cylinder #14 Injector current below normal 14-6 Cylinder #14 Injector current above normal 14-7 Cylinder #14 Injector not responding properly 15-2 Cylinder #15 Injector erratic, intermittent, or incorrect 15-5 Cylinder #15 Injector current below normal 15-6 Cylinder #15 Injector current above normal 15-7 Cylinder #15 Injector not responding properly 16-2 Cylinder #16 Injector erratic, intermittent, or incorrect 16-5 Cylinder #16 Injector current below normal Troubleshooting Procedure Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test
(continued)
24 Troubleshooting Section
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(Table 9, contd)
Cross-Reference from CID-FMI Code to the Appropriate Test Procedure Diagnostic Code and Description 16-6 Cylinder #16 Injector current above normal 16-7 Cylinder #16 Injector not responding properly 18-7 Fuel Control Valve not responding properly 18-8 Fuel Control Valve abnormal frequency, pulse width, or period 18-9 Fuel Control Valve abnormal update rate 18-11 Fuel Control Valve other failure mode 18-12 Fuel Control Valve failure 41-3 8 Volt DC Supply voltage above normal 41-4 8 Volt DC Supply voltage below normal 91-8 Throttle Position Sensor abnormal frequency, pulse width, or period Troubleshooting Procedure Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test The actual position and the desired position of the fuel actuator is not within specications. Replace the high pressure fuel pump. Troubleshooting, Fuel Rail Pressure - Test Troubleshooting, Fuel Rail Pressure - Test During a self test, the fuel control valve has detected an internal fault. Replace the high pressure fuel pump. Troubleshooting, Sensor Supply - Test Troubleshooting, Sensor Supply - Test Troubleshooting, Sensor Signal (PWM) - Test The ltered fuel pressure is greater than the unltered fuel pressure. Ensure that the sensor connectors are connected to the correct sensors. If an electrical problem with a sensor is suspected, refer to Troubleshooting, Sensor Signal (Analog, Active) - Test for information that is related to troubleshooting an electrical problem with the fuel pressure sensors. The ltered oil pressure is greater than the unltered oil pressure. Ensure that the sensor connectors are connected to the correct sensors. If an electrical problem with a sensor is suspected, refer to Troubleshooting, Sensor Signal (Analog, Active) - Test for information that is related to troubleshooting an electrical problem with the oil pressure sensors. Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Supply - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Passive) - Test Troubleshooting, Sensor Signal (Analog, Passive) - Test Troubleshooting, Electrical Power Supply - Test Troubleshooting, Electrical Power Supply - Test Troubleshooting, Electrical Power Supply - Test Troubleshooting, Sensor Signal (PWM) - Test Troubleshooting, Sensor Signal (PWM) - Test Troubleshooting, Sensor Signal (PWM) - Test
(continued)
99-2 Engine Oil Filter Differential Pressure Sensor erratic, intermittent, or incorrect
100-3 Engine Oil Pressure Sensor voltage above normal 100-4 Engine Oil Pressure Sensor voltage below normal 100-10 Engine Oil Pressure Sensor abnormal rate of change 101-3 Crankcase Air Pressure Sensor voltage above normal 101-4 Crankcase Air Pressure Sensor voltage below normal 110-3 Engine Coolant Temperature Sensor voltage above normal 110-4 Engine Coolant Temperature Sensor voltage below normal 168-0 Electrical System Voltage high - most severe (3) 168-1 Electrical System Voltage low - most severe (3) 168-2 Electrical System Voltage erratic, intermittent, or incorrect 171-3 Ambient Air Temperature Sensor voltage above normal 171-4 Ambient Air Temperature Sensor voltage below normal 171-8 Ambient Air Temperature Sensor abnormal frequency, pulse width, or period
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25 Troubleshooting Section
(Table 9, contd)
Cross-Reference from CID-FMI Code to the Appropriate Test Procedure Diagnostic Code and Description 172-3 Intake Manifold Air Temperature Sensor voltage above normal 172-4 Intake Manifold Air Temperature Sensor voltage below normal 174-3 Fuel Temperature Sensor voltage above normal 174-4 Fuel Temperature Sensor voltage below normal 175-3 Engine Oil Temperature Sensor voltage above normal 175-4 Engine Oil Temperature Sensor voltage below normal 190-8 Engine Speed Sensor abnormal frequency, pulse width, or period 247-9 SAE J1939 Data Link abnormal update rate 253-2 Personality Module erratic, intermittent, or incorrect 262-3 5 Volt Sensor DC Power Supply voltage above normal 262-4 5 Volt Sensor DC Power Supply voltage below normal 267-2 Remote Shutdown Input erratic, intermittent, or incorrect 268-2 Programmed Parameter Fault erratic, intermittent, or incorrect 274-3 Atmospheric Pressure Sensor voltage above normal 274-4 Atmospheric Pressure Sensor voltage below normal 289-3 Fuel Pressure Sensor - Before Fuel Filter voltage above normal 289-4 Fuel Pressure Sensor - Before Fuel Filter voltage below normal 296-9 Transmission Control abnormal update rate 296-14 Transmission Control special instruction 338-5 Engine Pre-Lube Pump Relay current below normal 338-6 Engine Pre-Lube Pump Relay current above normal 342-8 Secondary Engine Speed Sensor abnormal frequency, pulse width, or period 342-11 Secondary Engine Speed Sensor other failure mode 460-3 Fuel Pressure Sensor - After Fuel Filter voltage above normal 460-4 Fuel Pressure Sensor - After Fuel Filter voltage below normal 533-9 Brake Control abnormal update rate 533-14 Brake Control special instruction 542-3 Engine Oil Pressure Sensor - Before Oil Filter voltage above normal 542-4 Engine Oil Pressure Sensor - Before Oil Filter voltage below normal Troubleshooting Procedure Troubleshooting, Sensor Signal (PWM) - Test Troubleshooting, Sensor Signal (Analog, Passive) - Test Troubleshooting, Sensor Signal (Analog, Passive) - Test Troubleshooting, Sensor Signal (Analog, Passive) - Test Troubleshooting, Sensor Signal (Analog, Passive) - Test Troubleshooting, Sensor Signal (Analog, Passive) - Test Troubleshooting, Speed/Timing - Test Troubleshooting, Data Link - Test Troubleshooting, System Conguration Parameters This power supply is not used for this application. This power supply is not used for this application.
Troubleshooting, Shutdown - Test Troubleshooting, Conguration Parameters Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Data Link - Test Troubleshooting, Data Link - Test Troubleshooting, Prelubrication - Test Troubleshooting, Prelubrication - Test Troubleshooting, Speed/Timing - Test Troubleshooting, Speed/Timing - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Data Link - Test Troubleshooting, Data Link - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test
(continued)
26 Troubleshooting Section
KENR5398-01
(Table 9, contd)
Cross-Reference from CID-FMI Code to the Appropriate Test Procedure Diagnostic Code and Description 542-10 Engine Oil Pressure Sensor - Before Oil Filter abnormal rate of change 569-5 Oil Injection Solenoid current below normal 569-6 Oil Renewal Solenoid short to ground 1273-9 Chassis Control Module abnormal update rate 1273-14 Chassis Control Module special instruction 1491-3 Right Turbo Turbine Inlet Temperature Sensor voltage above normal 1491-4 Right Turbo Turbine Inlet Temperature Sensor voltage below normal 1491-8 Right Turbo Turbine Inlet Temperature Sensor abnormal frequency, pulse width, or period 1492-3 Left Turbo Turbine Inlet Temperature Sensor voltage above normal 1492-4 Left Turbo Turbine Inlet Temperature Sensor voltage below normal 1492-8 Left Turbo Turbine Inlet Temperature Sensor abnormal frequency, pulse width, or period 1627-5 Fuel Pump Relay current below normal 1627-6 Fuel Pump Relay current above normal 1785-3 Intake Manifold Pressure Sensor voltage above normal 1785-4 Intake Manifold Pressure Sensor voltage below normal 1785-10 Intake Manifold Pressure Sensor abnormal rate of change 1796-3 Intake Manifold #2 Air Temperature Sensor voltage above normal 1796-4 Intake Manifold #2 Air Temperature Sensor voltage below normal 1797-3 Fuel Rail Pressure Sensor voltage above normal 1797-4 Fuel Rail Pressure Sensor voltage below normal Troubleshooting Procedure Troubleshooting, Sensor Supply - Test Troubleshooting, Oil Renewal - Test Troubleshooting, Oil Renewal - Test Troubleshooting, Data Link - Test Troubleshooting, Data Link - Test Troubleshooting, Sensor Signal (PWM) - Test Troubleshooting, Sensor Signal (PWM) - Test Troubleshooting, Sensor Signal (PWM) - Test Troubleshooting, Sensor Signal (PWM) - Test Troubleshooting, Sensor Signal (PWM) - Test Troubleshooting, Sensor Signal (PWM) - Test Troubleshooting, Fuel Transfer Pump - Test Troubleshooting, Fuel Transfer Pump - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Supply - Test Troubleshooting, Sensor Signal (Analog, Passive) - Test Troubleshooting, Sensor Signal (Analog, Passive) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test The pressure in the high pressure fuel system is uctuating out of specications. Use Cat ET to monitor the fuel pressure in the low pressure fuel system and in the high pressure fuel system. Refer to the appropriate troubleshooting procedure that is for the suspected problem. Verify that there is no problem with the pressure sensor for the high pressure fuel system. If a problem with the pressure sensor is suspected, refer to Troubleshooting, Sensor Signal (Analog, Active) - Test. Check for diagnostic codes that are related to the high pressure fuel pumps fuel control valve. Repair any active codes. If the high pressure fuel pump is suspected of mechanical damage, replace the pump.
(continued)
KENR5398-01
27 Troubleshooting Section
(Table 9, contd)
Cross-Reference from CID-FMI Code to the Appropriate Test Procedure Diagnostic Code and Description 1797-10 Fuel Rail Pressure Sensor abnormal rate of change 1834-2 Ignition Key Switch loss of signal 2131-3 5 Volt Sensor DC Power Supply #2 voltage above normal 2131-4 5 Volt Sensor DC Power Supply #2 voltage below normal 2247-3 Fuel Transfer Pump Inlet Pressure Sensor voltage above normal 2247-4 Fuel Transfer Pump Inlet Pressure Sensor voltage below normal 2302-3 Engine Coolant Pump Outlet Pressure Sensor voltage above normal 2302-4 Engine Coolant Pump Outlet Pressure Sensor voltage below normal 2323-3 Fuel Rail Temperature Sensor voltage above normal 2323-4 Fuel Rail Temperature Sensor voltage below normal 2348-9 SAE J1939 Data Link #2 abnormal update rate 2349-19 Engine Coolant Pump Outlet Temperature Sensor conditions not met 2417-5 Ether Injection Control Solenoid current below normal 2417-6 Ether Injection Control Solenoid current above normal 2493-2 Cylinder #17 Injector erratic, intermittent, or incorrect 2493-5 Cylinder #17 Injector current below normal 2493-6 Cylinder #17 Injector current above normal 2493-7 Cylinder #17 Injector not responding properly 2494-2 Cylinder #18 Injector erratic, intermittent, or incorrect 2494-5 Cylinder #18 Injector current below normal 2494-6 Cylinder #18 Injector current above normal 2494-7 Cylinder #18 Injector not responding properly 2495-2 Cylinder #19 Injector erratic, intermittent, or incorrect 2495-5 Cylinder #19 Injector current below normal 2495-6 Cylinder #19 Injector current above normal 2495-7 Cylinder #19 Injector not responding properly 2496-2 Cylinder #20 Injector erratic, intermittent, or incorrect 2496-5 Cylinder #20 Injector current below normal 2496-6 Cylinder #20 Injector current above normal 2496-7 Cylinder #20 Injector not responding properly 2710-8 Engine Tertiary Speed Sensor abnormal frequency, pulse width, or period Troubleshooting Procedure During the engines crank cycle, the ECM did not detect a deviation in the signal from the pressure sensor that is for the fuel rail. Refer to Troubleshooting, Sensor Supply - Test in order to troubleshoot the sensor. Troubleshooting, Electrical Power Supply - Test Troubleshooting, Sensor Supply - Test Troubleshooting, Sensor Supply - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Passive) - Test Troubleshooting, Sensor Signal (Analog, Passive) - Test Troubleshooting, Data Link - Test The temperature control module reported that there is a problem with the circuit for the coolant temperature sensor. Troubleshoot and repair the circuit. Troubleshooting, Ether Starting Aid - Test Troubleshooting, Ether Starting Aid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Injector Solenoid - Test Troubleshooting, Speed/Timing - Test
(continued)
28 Troubleshooting Section
KENR5398-01
(Table 9, contd)
Cross-Reference from CID-FMI Code to the Appropriate Test Procedure Diagnostic Code and Description 2710-11 Engine Tertiary Speed Sensor other failure mode 2738-3 Turbocharger #1 Compressor Inlet Pressure Sensor voltage above normal 2738-4 Turbocharger #1 Compressor Inlet Pressure Sensor voltage below normal 2739-3 Turbocharger #2 Compressor Inlet Pressure Sensor voltage above normal 2739-4 Turbocharger #2 Compressor Inlet Pressure Sensor voltage below normal 2740-3 Turbocharger #3 Compressor Inlet Pressure Sensor voltage above normal 2740-4 Turbocharger #3 Compressor Inlet Pressure Sensor voltage below normal 2741-3 Turbocharger #4 Compressor Inlet Pressure Sensor voltage above normal 2741-4 Turbocharger #4 Compressor Inlet Pressure Sensor voltage below normal 2854-9 Coolant Temperature Control Module abnormal update rate 3031-3 Intake Manifold #2 Pressure Sensor voltage above normal 3031-4 Intake Manifold #2 Pressure Sensor voltage below normal 3031-10 Intake Manifold #2 Pressure Sensor abnormal rate of change Troubleshooting Procedure Troubleshooting, Speed/Timing - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Data Link - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Signal (Analog, Active) - Test Troubleshooting, Sensor Supply - Test
Diagnostic Codes
Diagnostic codes alert the operator that a problem in the electronic system has been detected. Diagnostic codes are also used by the service technician to identify the nature of the problem. Caterpillar Electronic Technician (ET) is a software program that is for a personal computer. The software can be used by the service technician in order to view the diagnostic code information for an ECM. Diagnostic codes may consist of the module identier (MID), the component identier (CID), and the failure mode identier (FMI). Component Identier (MID) The MID is a three digit code that identies the ECM that generated the diagnostic code. For example, the MID 036 identies the engine ECM. Component Identier (CID) The CID is a number with three or four digits. The CID indicates the component that generated the code. For example, the CID number 0001 identies the fuel injector for the number one cylinder.
Failure Mode Identier (FMI) The FMI is a number that indicates the type of failure. Refer to Table 9 for a complete list of the diagnostic codes and the appropriate troubleshooting procedure. Note: Do not confuse diagnostic codes with event codes. Event codes alert the operator that an abnormal operating condition such as low oil pressure or high coolant temperature has been detected. If an event code is active, refer to Troubleshooting, Event Codes. Illustration 19 is an example of the operating range of a sensor.
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29 Troubleshooting Section
The hour of the rst occurrence of the code The hour of the last occurrence of the code The number of occurrences of the code
This information is a valuable indicator for troubleshooting intermittent problems. A code is cleared from memory when one of the following conditions occur:
The service technician manually clears the code. The code does not recur for 100 hours. A new code is logged and there are already ten
codes in memory. In this case, the oldest code is cleared.
g01365757
(1) This area represents the normal operating range of the engine parameter. (2) In these areas, the engine is operating in an unsafe operating range of the monitored parameter. An event code will be generated for the monitored parameter. The sensor circuit does not have an electronic problem. Refer to Troubleshooting, Event Code List for additional information on event codes. (3) In these areas, the signal from the sensor is outside of the operating range of the sensor. The sensor circuit has an electronic problem. A diagnostic code will be generated for the sensor circuit.
Some diagnostic codes may be easily triggered. Some diagnostic codes may log occurrences that did not result in complaints. The most likely cause of an intermittent problem is a faulty connection or damaged wiring. The next likely cause is a component failure. The least likely cause is the failure of an electronic module. Diagnostic codes that are logged repeatedly may indicate a problem that needs special investigation. Note: Always clear logged diagnostic codes after investigating and correcting the problem which generated the code.
30 Troubleshooting Section
KENR5398-01
Event Codes
i02881680
Event Codes
SMCS Code: 1900
Engine Monitoring
The Electronic Control Module (ECM) monitors the operating parameters of the engine. The ECM will generate an event code if a specic engine parameter exceeds an acceptable range that is dened by the engine monitoring system. For information on the engine monitoring system, refer to Troubleshooting, Engine Monitoring System.
Cross-Reference from Event Code to the Appropriate Test Procedure Event Code E072(2) Oil Level Low Mark Procedure The engine oil level is below the specied level. Check the engine oil level. If necessary, add oil to the engine and return the engine to service. Refer to the Operation and Maintenance Manual for details. If a problem is suspected with the engines lubrication system, refer to Troubleshooting, Oil Consumption Is Excessive for information that is related to troubleshooting this symptom. Troubleshooting, Fuel Pressure Is High The keyswitch has been cycled from the START position, to the OFF position, and back to the START position in six seconds or less. The prelube cycle has been overridden by the operator. Troubleshooting, Oil Filter Differential Pressure Problem Troubleshooting, Crankcase Pressure Is High Check the ECM for a buildup of debris and/or mud. Clean the ECM, as needed.
E072(3) Oil Level Low Mark E096(1) High Fuel Pressure E098(1) Engine Pre-lube Override E099(1) Engine Oil Filter Restriction Warning E101(1) High Crankcase Pressure Warning E103(0) Module Internal Over Temperature E197(1) High Engine Oil Temperature E197(2) High Engine Oil Temperature E197(3) High Engine Oil Temperature E198(1) Low Fuel Pressure E198(2) Low Fuel Pressure
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31 Troubleshooting Section
Cross-Reference from Event Code to the Appropriate Test Procedure Event Code E232(1) High Fuel/Water Separator Water Level E232(2) High Fuel/Water Separator Water Level E233(2) Low Engine Pre-lube Pressure E245(2) High Right Turbo Turbine Inlet Temperature E245(3) High Right Turbo Turbine Inlet Temperature E246(2) High Left Turbo Turbine Inlet Temperature E246(3) High Left Turbo Turbine Inlet Temperature E265(2) User Dened Shutdown E360(1) Low Engine Oil Pressure E360(3) Low Engine Oil Pressure E361(1) High Engine Coolant Temperature E361(2) High Engine Coolant Temperature E361(3) High Engine Coolant Temperature E362(1) Engine Overspeed E362(2) Engine Overspeed E362(3) Engine Overspeed E363(1) High Fuel Supply Temperature E363(2) High Fuel Supply Temperature E390(1) Fuel Filter Restriction E390(2) Fuel Filter Restriction E396(1) High Fuel Rail Pressure E398(1) Low Fuel Rail Pressure E398(2) Low Fuel Rail Pressure E539(1) High Intake Manifold Air Temperature E539(2) High Intake Manifold Air Temperature E583(1) High Air Inlet #1 Differential Pressure E583(2) High Air Inlet #1 Differential Pressure E584(1) High Air Inlet #2 Differential Pressure E584(2) High Air Inlet #2 Differential Pressure E585(1) High Air Inlet #3 Differential Pressure E585(2) High Air Inlet #3 Differential Pressure E586(1) High Air Inlet #4 Differential Pressure E586(2) High Air Inlet #4 Differential Pressure Troubleshooting, Fuel Temperature is High Troubleshooting, Engine Overspeeds Troubleshooting, Coolant Temperature Is High This event is used to record a requested shutdown from an aftermarket shutdown device. Troubleshooting, Oil Pressure Is Low Troubleshooting, Turbocharger Turbine Temperature Is High Procedure The level of water that is in the fuel systems fuel/water separator is excessive. Remove the water from the water trap and return the engine to service. Refer to the Operation and Maintenance Manual for details. Troubleshooting, Prelubrication Pump Problem
Troubleshooting, Fuel Filter Is Restricted Troubleshooting, Fuel Rail Pressure Is High Troubleshooting, Fuel Rail Pressure Is Low
Troubleshooting, Inlet Air Is Restricted The ground level shutdown switch has been activated. Reset the switch to the RUN position. If an electrical problem with the switch or with the switch circuit is suspected, refer to Troubleshooting, Shutdown - Test for information that is related to troubleshooting the ground level shutdown switch.
(continued)
32 Troubleshooting Section
KENR5398-01
Cross-Reference from Event Code to the Appropriate Test Procedure Event Code E770(1) High Fuel Rail Temperature E770(2) High Fuel Rail Temperature E2089(1) Oil Renewal System Cannot Operate E2112(1) Low Engine Coolant Pressure Procedure Troubleshooting, Fuel Temperature is High Troubleshooting, Oil Renewal - Test Troubleshooting, Coolant Pressure Is Low The engines coolant level is below the specied level. Check the level of the engine coolant. If necessary, add coolant to the cooling system and return the engine to service. Refer to the Operation and Maintenance Manual for details. If an electrical problem is suspected with the engines cooling system, refer to Troubleshooting, Coolant Level - Test for information that is related to troubleshooting the coolant level switch. Troubleshooting, Fuel Transfer Pump Inlet Pressure Is Low
E2143(3) Low Engine Coolant Level E2172(1) Low Fuel Transfer Pump Inlet Pressure
E360(1) Low Oil Pressure E360(2) Low Oil Pressure E360(3) Low Oil Pressure
The denition for the levels of severity for an event are dened below:
Table 11
Indicators (1), (2), and (3) Warning Category Indicator (1) (2) (3) Severity Least Severe Moderate Severity Most Severe
KENR5398-01
33 Troubleshooting Section
This information can be helpful for troubleshooting intermittent problems. Logged codes can also be used to review the performance of the engine.
The code does not recur for 100 hours. A new code is logged and there are already ten
codes in memory. In this case, the oldest code is cleared.
Troubleshooting
For basic troubleshooting of the engine, perform the following steps in order to diagnose a malfunction: 1. Obtain the following information about the complaint:
The event and the time of the event Determine the conditions for the event. The
Illustration 20 Example of the typical operating range of a sensor (1) This area represents the normal operating range of the engine parameter. (2) In these areas, the engine is operating in an unsafe operating range of the monitored parameter. An event code will be generated for the monitored parameter. The sensor circuit does not have an electronic problem. (3) In these areas, the signal from the sensor is outside of the operating range of the sensor. The sensor circuit has an electronic problem. A diagnostic code will be generated for the sensor circuit. Refer to Troubleshooting, Diagnostic Trouble Codes for additional information on diagnostic codes.
g01365757
conditions will include the engine rpm and the load. installed by the dealer or by the customer that could cause the event. occurred.
The hour of the rst occurrence of the code The hour of the last occurrence of the code The number of occurrences of the code
Logged events are listed in chronological order. The most recent event code is listed rst.
34 Troubleshooting Section
KENR5398-01
Be sure to check the connectors. This is very important for problems that are intermittent. Refer to Troubleshooting, Electrical Connectors - Inspect. If these steps do not resolve the problem, refer to Table 10 for the procedure to troubleshoot the event code.
Check engine lamp Action lamp and Advisor message Action alarm
The following table summarizes the relationship between the levels of severity that are reported by the engine ECM and the actions that are taken by the monitoring system.
Table 12
VIMS Service Warning for the Engine System Warning Category Indicator (1) (2) Check Engine Lamp The lamp is illuminated. The lamp is illuminated. Action Lamp Advisor message Off The lamp will ash. Advisor displays a warning message. The lamp will ash. Advisor displays a warning message. Action Alarm Off Off
(3)(1)
(1)
The VIMS may also perform an engine shutdown for some level 3 warnings that are reported by the engine ECM. This shutdown will only be performed if the vehicle speed is equal to zero rpm and the parking brake has been engaged.
KENR5398-01
35 Troubleshooting Section
Table 13
Trip Points for the Monitoring System Event Code Level of Severity (2) E072 Oil Level Low Mark (3)(1) E096 High Fuel Pressure E099 Engine Oil Filter Restriction Warning (C175-16) E099 Engine Oil Filter Restriction Warning (C175-20) E101 High Crankcase Pressure Warning (1) (1) Trip Point and Enabling Conditions The circuit for the oil level switch is open. This event is enabled when the keyswitch is turned to the ON position. The circuit for the oil level switch is open. This event is enabled 17 seconds after the engine has been started. 758 kPa (110 psi) 150 kPa (22 psi) This event is enabled 15 seconds after the engine oil temperature has exceeded 20 C (68 F). 180 kPa (26 psi) This event is enabled 15 seconds after the engine oil temperature has exceeded 20 C (68 F). 4 kPa (0.6 psi) This event is enabled 15 seconds after the coolant temperature has exceeded 15 C (59 F). 108 C (226 F) 110 C (230 F) 115 C (239 F) Refer to the control map for low fuel pressure in Illustration 21 for details. 10 40 3600 45 15 15 Delay Time in Seconds 10 N/A 12 8 10 N/A N/A Derate (%)
(1)
10
N/A
(1) (1)
N/A N/A Map Dependent Values N/A N/A Map Dependent Values N/A 35 N/A 20 N/A 20 N/A N/A 35 N/A
(2) (1) (2) (2) (2) (3) (2) (3) (1) (3)(1) (1)
E232 High Fuel/Water Separator Water Level E233 Low Engine Pre-lube Pressure E245 High Right Turbo Turbine Inlet Temperature E246 High Left Turbo Turbine Inlet Temperature E360 Low Engine Oil Pressure
The switch has opened. 48 kPa (7 psi) 750 C (1380 F) 845 C (1550 F) 750 C (1380 F) 845 C (1550 F) Refer to the control map for low oil pressure in Illustration 22 for details. 100 C (212 F) 101 C (214 F) 110 C (230 F) 2250 rpm 2325 rpm 2400 rpm
15 8 4
10
Map Dependent Values N/A The ECM disables injection above the trip point.
(continued)
(2) (3)
0.6
36 Troubleshooting Section
KENR5398-01
Trip Points for the Monitoring System Event Code Level of Severity (1) (2) (1) (2) (1) (1) (2) (1) (2) (1) (2) (1) (2) (1) (2) (1) (2) (3) (1) (2) 100 C (212 F) The ECM detects a fault in the circuit for the oil renewal solenoid. or The ECM detects a fault in the circuit for the coolant temperature sensor. or The ECM detects a fault in the circuit for the fuel level sensor. or The ECM detects a fault in the circuit for the oil pressure sensor. Refer to the control map for low coolant pressure in Illustration 23 for details. 15 The ground level switch is on.
(2) (2) (2)
Map Dependent Values N/A 35 N/A N/A 100 N/A 30 Map Dependent Values Map Dependent Values Map Dependent Values Map Dependent Values The engine ECM disables fuel injection to the engine. N/A Map Dependent Values
E390 Fuel Filter Restriction E396 High Fuel Rail Pressure E398 Low Fuel Rail Pressure E539 High Intake Manifold Air Temperature E583 High Air Inlet #1 Differential Pressure E584 High Air Inlet #2 Differential Pressure E585 High Air Inlet #3 Differential Pressure E586 High Air Inlet #4 Differential Pressure E678 Ground Level Shutdown
(2)
65 C (149 F) 75 C (167 F)
(2)
N/A
N/A
N/A
N/A
N/A
(1)
N/A
N/A
(1)
10
N/A
(continued)
KENR5398-01
37 Troubleshooting Section
Trip Points for the Monitoring System Event Code Level of Severity Trip Point and Enabling Conditions The circuit for the engine coolant level switch is open. This event is enabled when the keyswitch is turned to the ON position. The circuit for the engine coolant level switch is open. This event is enabled 17 seconds after the engine has been started. 50 kPa (7 psi) Delay Time in Seconds 10 N/A 12 Derate (%)
(2) E2143 Low Engine Coolant Level (3)(1) E2172 Low Fuel Transfer Pump Inlet Pressure
(1) (2)
(1)
60
N/A
The VIMS will perform an engine shutdown when the vehicle speed is equal to zero mph and the parking brake has been engaged. This code does not have a specic trip point. Several factors determine when the code is tripped.
Illustration 21 Control map for the engine monitoring systems low fuel pressure
g01442071
38 Troubleshooting Section
KENR5398-01
Illustration 22 Control map for the engine monitoring systems low oil pressure
g01442300
Illustration 23 Control map for the engine monitoring systems low coolant pressure
g01442097
Separate timers are used in the ECM for each response that is associated with a parameter. If a trip point is reached, the timer for that event is started.
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39 Troubleshooting Section
Symptom Troubleshooting
i02581026
Symptom Troubleshooting
SMCS Code: 7569 Some engine symptoms can be unrelated to the electronic control system. Gather information about the complaint that describes the symptoms. Verify that the complaint is not due to normal engine operation. Perform the following steps in order to determine the problem. 1. Repair all active diagnostic codes. 2. Gather operator information. 3. Verify that the complaint is not due to normal engine operation. 4. Perform a visual inspection of the engine. Inspect the following items:
Probable Causes
Alternator drive belts Alternator drive pulley Alternator bearings Charging circuit Regulator Alternator
Wiring Connectors Fuel level Fuel supply Engine oil level Engine oil supply Coolant level Intake air system Air exhaust system
5. Check the wiring and the connectors for the following problems:
Recommended Actions
Alternator Drive Belts
1. Inspect the condition of the alternator drive belts. If the alternator drive belts are worn or damaged, replace the belts. Refer to Disassembly and Assembly. 2. Check the belt tension. Refer to the engines Specications manual. 3. If the engine is equipped with an automatic belt tensioner, check the automatic belt tensioner. If necessary, replace the automatic belt tensioner. Note: Excessive belt tension can result in damage to the alternator.
40 Troubleshooting Section
KENR5398-01
Alternator Bearings
Check the alternator bearings for signs of wear. Repair the alternator or replace the alternator, as needed.
3. Pressurize the cooling system in order to identify the injector sleeve that is leaking. Closely inspect the sealing joint around the top of the injector sleeve. Small amounts of coolant will be dripping from the injector sleeve that is leaking. Note: Do not allow the pressure on the cooling system to exceed 103 kPa (15 psi) during the test. Damage to the cooling system may result from applying excessive pressure. Refer to the Systems Operation/Testing and Adjusting manual for details. 4. Remove the injector sleeve that is leaking. Carefully inspect the sleeve for damage. If there are visible signs of damage to the injector sleeve, replace the sleeve. Replace the O-ring seals for the injector sleeve and reinstall the sleeve. Replace any damaged components. Note: Coolant may also be contaminating the fuel system. After the engine is shutdown, the retention of pressure in the cooling system may cause the transfer of coolant into the fuel system. Visually inspect the fuel tank for coolant. The contamination of coolant in the fuel system may cause damage to injectors and other fuel system components. Ensure that all of the fuel system components are in good repair prior to returning the engine to service.
i02883182
Charging Circuit
Inspect the battery cables, wiring, and connections in the charging circuit. Clean all connections and tighten all connections. Replace any faulty parts.
Alternator or Regulator
Verify that the alternator or the regulator is operating correctly. Refer to Special Instruction, REHS0354, Charging System Troubleshooting for the proper testing procedures. Repair the alternator or replace the alternator, as needed.
i02726474
Probable Causes
Injector sleeve or injector sleeve seal
Recommended Actions
Injector Sleeve or Injector Sleeve Seals
1. Remove the valve mechanism covers. 2. Remove the fuel injectors from the cylinder head. Refer to the Disassembly and Assembly manual for details.
Probable Causes
Water Pump Engine oil cooler core Cylinder head gasket
Personal injury can result from hot coolant, steam and alkali. At operating temperature, engine coolant is hot and under pressure. The radiator and all lines to heaters or the engine contain hot coolant or steam. Any contact can cause severe burns. Remove ller cap slowly to relieve pressure only when engine is stopped and radiator cap is cool enough to touch with your bare hand. Cooling System Conditioner contains alkali. Avoid contact with skin and eyes.
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41 Troubleshooting Section
Recommended Actions
Water Pump
1. Check for leaks around the seal of the water pump. Look for damage to the seal, the impeller shaft, and the impeller shaft bearings. If a leak is identied, replace the damaged components. Refer to the Disassembly and Assembly manual. 2. Drain the crankcase and rell the crankcase with clean engine oil. Install new engine oil lters. Refer to the Operation and Maintenance Manual.
i02897133
Event Code Description E2112(1) Low Engine Coolant Pressure Conditions which Generate this Code The engine coolant pressure is below the trip point pressure for the programmed delay time. System Response The code is logged.
Probable Causes
Low coolant level Damaged coolant lines Radiator blockage Blockage of the oil cooler heat exchanger Engine coolant pump outlet pressure sensor Jacket water coolant pump
Cylinder Head
Check for cracks in the cylinder head. If a crack is found, repair the cylinder head and/or replace the cylinder head. Refer to the Disassembly and Assembly manual.
Cylinder Liner
Check for cracked cylinder liners. Replace any cracked cylinder liners. Refer to the Disassembly and Assembly manual.
Recommended Actions
Low Coolant Level
Inspect the coolant level. If necessary, add coolant.
Cylinder Block
Inspect the cylinder block for cracks. If a crack is found, repair the cylinder block or replace the cylinder block.
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Radiator Blockage
Check the radiator for internal blockage. Check the temperature difference between the inlet and the outlet of the radiator. Clean the radiator or perform the necessary repairs.
Steam or hot coolant can cause severe burns. Do not loosen the ller cap or the pressure cap on a hot engine. Allow the engine to cool before removing the ller cap or the pressure cap. While the engine is off and the cooling system is cool, remove any pressure from the system by carefully removing the pressure cap. While there is no pressure in the cooling system, use Cat ET to check the status of the Engine Coolant Pump Outlet Pressure (Absolute) parameter. Compare the status to the status of the Atmospheric Pressure parameter. For sensors that are working correctly, the pressures will be comparable. Install a pressure gauge near the pressure sensor at the outlet of the coolant pump. Start the engine. Use Cat ET to check the status of the Engine Coolant Pump Outlet Pressure (Absolute) parameter while the engine is at low engine idle. Compare the gauge reading with the reading from Cat ET. Also, compare the readings during engine operation. If the readings from the comparative gauge do not agree approximately with Cat ET, troubleshoot the circuit for the pressure sensor. Refer to Troubleshooting, Sensor Signal (Analog, Active) Test for details. Perform the necessary repairs.
Event Code Description E361(1) High Engine Coolant Temperature E361(2) High Engine Coolant Temperature E361(3) High Engine Coolant Temperature Conditions which Generate this Code The engine coolant temperature is above the trip point temperature for the programmed delay time. System Response The code is logged. The code is logged. Engine power is derated. The code is logged. If the vehicles ground speed is zero and the parking brake is set, the engine will be shut down.
Probable Causes
Low coolant level Radiator Coolant leak Engine cooling fan Pressure relief valve Electronic uid temperature control system
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43 Troubleshooting Section
Recommended Actions
Low Coolant Level
Inspect the coolant level. If necessary, add coolant.
Radiator
Check the cooling ns on the radiator for dirt and/or for debris. Remove the dirt and/or debris. 1. Check the cooling ns on the radiator for damage. Refer to the Systems Operation/Testing and Adjusting manual for instructions for testing and inspecting the cooling system. 2. Check the radiator for internal blockage. Check the temperature difference between the inlet and the outlet of the radiator. Clean the radiator or perform the necessary repairs.
g01320751
(1) 8-pin connector for the motor assembly and the communications device (2) 12-pin connector for the engine harness
Coolant Leak
Check the cooling system for leaks. 1. Inspect the coolant for presence of bubbles. Cavitation will reduce the efciency of the cooling system. 2. Check the cooling system for combustion gases. Inspect the cylinder liners for cracks.
1. Visually inspect the wiring from the temperature control module to the coolant temperature sensor and from the temperature control module to the power supply. Visually inspect the 12-pin connector and the 8-pin connector at the temperature control module. Check for a tight connection at the connectors. All wiring and connections must be in good repair. 2. Check for proper operation of the electronic uid temperature control: a. Ensure that the keyswitch is in the OFF position. Turn the electrical disconnect to the OFF position.
g01320857
b. Remove cover bolts (4) from the motor assembly. Remove the inspection cover from the motor.
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c. Check main shaft extension (3) for rotation while you turn the keyswitch to the ON position. The shaft will rotate several times during the powerup sequence. d. During the powerup sequence, listen for the valve to hammer the end stop. The valve will hammer the end stop in order to establish the valve position. e. With the keyswitch and the electrical disconnect in the ON position, disconnect the engine harness connector (12 pin) at the controller. f. Connect the connector and observe the motor assembly. The valve will repeat the power up sequence when the engine harness (power) is connected. While you connect the connector, check the main shaft extension for rotation. The valve will hammer the end stop. Turn the keyswitch and the electrical disconnect to the OFF position. Replace the inspection cover and connect all connectors.
Probable Causes
Very light loads Electronic uid temperature control system
Recommended Actions
Very Light Loads
Very light loads or a very slow engine speed can cause overcooling. This overcooling is caused by the reduced amount of heat that is produced by the engine during light loads.
Illustration 26
g01321224
3. Disconnect the engine harness connector (12 pin) at the temperature control module. Measure the battery voltage between terminal 1 (+Battery) and terminal 5 (return) on the harness side of the engine harness connector (12 pin) at the temperature control module. The supply voltage for the control module must be between 18 VDC and 32 VDC. Restore the wiring to the original conguration. If the problem has not been resolved, contact the Service Engineer for further instructions.
g01320751
(1) 8-pin connector for the motor assembly and the communications device (2) 12-pin connector for the engine harness
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45 Troubleshooting Section
1. Visually inspect the wiring from the temperature control module to the coolant temperature sensor and from the temperature control module to the power supply. Visually inspect the 12-pin connector and the 8-pin connector at the temperature control module. Check for a tight connection at the connectors. All wiring and connections must be in good repair. 2. Check for proper operation of the electronic uid temperature control: a. Ensure that the keyswitch is in the OFF position. Turn the electrical disconnect to the OFF position.
Turn the keyswitch and the electrical disconnect to the OFF position. Replace the inspection cover and connect all connectors.
Illustration 29
g01321224
3. Disconnect the engine harness connector (12 pin) at the temperature control module. Measure the battery voltage between terminal 1 (+Battery) and terminal 5 (return) on the harness side of the engine harness connector (12 pin) at the temperature control module. The supply voltage for the control module must be between 18 VDC and 32 VDC. Restore the wiring to the original conguration.
Illustration 28 (3) Main shaft extension (4) Cover bolts
g01320857 i02893388
b. Remove cover bolts (4) from the motor assembly. Remove the inspection cover from the motor. c. Check main shaft extension (3) for rotation while you turn the keyswitch to the ON position. The shaft will rotate several times during the powerup sequence. d. During the powerup sequence, listen for the valve to hammer the end stop. The valve will hammer the end stop in order to establish the valve position. e. With the keyswitch and the electrical disconnect in the ON position, disconnect the engine harness connector (12 pin) at the controller. f. Connect the connector and observe the motor assembly. The valve will repeat the power up sequence when the engine harness (power) is connected. While you connect the connector, check the main shaft extension for rotation. The valve will hammer the end stop.
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Table 16
Keyswitch power
Event Code Conditions which Generate this Code The engines crankcase pressure is greater than the trip point pressure for the programmed delay time. System Response The code is logged.
Recommended Actions
ECM
Connect Caterpillar Electronic Technician (ET). If the ECM does not communicate with Cat ET, refer to service Troubleshooting, Electronic Service Tool Does Not Communicate. Note: This application utilizes dual data link communications for communicating with Cat ET. Some functionality will not be available if a single data link is being used for communications with the ECM.
Probable Causes
Worn engine components Plugged crankcase breather
Electrical Connectors
Check for correct installation of the J1/P1 and J2/P2 ECM connectors. Check for correct installation of all other applicable connectors. Refer to service Troubleshooting, Electrical Connectors - Inspect.
Recommended Actions
Engine Components
Damaged pistons or rings can cause excessive pressure in the crankcase. This condition may cause the engine to run rough. The engine will begin to emit an excessive volume of fumes (blowby) through the crankcase breather. The breather can then become restricted in a very short time, causing oil leakage at gaskets and seals that would not normally have leakage. Blowby can also be caused by worn valve guides or by a failed turbocharger seal.
Keyswitch Power
Ensure that keyswitch power is being provided to all of the modules that are on the application. Refer to Troubleshooting, Electrical Power Supply - Test for information that is related to troubleshooting the engines keyswitch circuit.
i02883187
Crankcase Breather
A plugged crankcase breather will cause excessive crankcase pressure. This can be the cause of leakage of the crankshaft seal. Sealing of the piston rings can be lost. This will enable crankcase blowby to further increase the crankcase pressure.
i02883186
Probable Causes
Electronic Control Module (ECM) Electrical connectors Data link communications
Probable Causes
Diagnostic Codes and Event Codes Slow cranking speed Battery condition
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47 Troubleshooting Section
ECM supply voltage Engine speed/timing signal Low pressure fuel system High pressure fuel system Fuel quality Starting aids Gear train problem
Battery Condition
Check the charge on the engines batteries. Charge the batteries, if necessary. Refer to Special Instruction, SEHS7633, Battery Test Procedure. Load test the batteries. Refer to Special Instruction, SEHS9249, Use of 4C-4911 Battery Load Tester for 6, 8 and 12 Volt Lead Acid Batteries.
Recommended Actions
Diagnostic Codes and Event Codes
Connect Caterpillar Electronic Technician to the service tool connector. Check for active diagnostic codes and event codes. Look for active diagnostic codes or active event codes that are related to the low pressure fuel system, the high pressure fuel system, the engine speed/timing sensors, and the shutdown devices. Check for event codes that are logged repeatedly. This may be evidence of an impending problem. Check for logged events that have a severity of level 3. If a problem has been discovered, perform the necessary repairs. If necessary, use the appropriate circuit test to troubleshoot any active diagnostic codes. Use Cat ET to conrm the status of any shutdown devices that are installed on the application. If the application has any shutoff devices that are latched mechanically, ensure that the devices have been reset. Also, check the status of any aftermarket shutdown devices that may be installed on the application. If engine starting is being prevented by one of these devices, refer to the OEM information for details.
Low voltage to the electric starting system Low air pressure to the air start system
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e. Check the voltage between terminal locations P1-57 (+Battery) and P1-61 (Battery) while you crank the engine. 3. Remove the multimeter probes from the engine. The supply voltage must be greater than 18 VDC at the ECM in order for the engine to start. If the supply voltage is below 18 VDC, troubleshoot the problem. Refer to Troubleshooting, Electrical Power Supply Test for details that are related to troubleshooting a low voltage at the keyswitch circuit.
4. If the fuel pressure is OK, check for air in the fuel system. Refer to Systems Operation/Testing and Adjusting for details. 5. If the fuel pressure is low, replace the fuel lters. If the problem is not found, refer to Troubleshooting, Fuel Pressure is Low for detailed troubleshooting that is related to the low pressure fuel system.
Engine Speed Primary Sensor Engine Speed Secondary Sensor Engine RPM from Tertiary Speed Sensor Primary Engine Speed Sensor Timing Pattern
Status Status Status
Fuel Quality
Check the fuel quality. For further information, refer to the engines Operation and Maintenance Manual. Cold weather adversely affects the characteristics of the fuel. Refer to the Operation and Maintenance Manual for information on improving the characteristics of the fuel during cold weather operation.
Secondary Engine Speed Sensor Timing Pattern Engine Tertiary Speed Sensor Timing Pattern
Ensure that all three of the engine speed sensors are indicating an engine rpm during cranking. Also, ensure that the status of signal patterns for each of the engine speed/timing sensors is Detected. Note: The engine will not start if the signal from more than one sensor is missing. If the operation of any of the engine speed/timing sensors is suspect, refer to Troubleshooting, Speed/Timing - Test for information that is related to troubleshooting the engine speed/timing circuit.
Starting Aids
1. Ensure that the ether canister is not empty or low. Replace the ether canister if the ether canister is empty or low. Refer to Troubleshooting, Ether Starting Aid - Test. 2. Use Cat ET in order to verify that the engine has exited cold mode. During cold mode, fuel injection timing is modied. When the engine is in cold mode, the cold cylinder cutout strategy may be active. Cold mode cylinder cutouts may cause variations in vibration and available power. This is normal operation.
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i02883188
Probable Causes
Engine shutdown switches Diagnostic codes and event codes Batteries Engine starting system Flywheel ring gear Transmission Power Take-Off (PTO) Engine accessories Hydraulic cylinder lock Internal engine problem
Recommended Actions
Engine Shutdown Switches
The engine shutdown switches should be in the RUN position. Ensure that the ground level shutdown switch and the cab switches are in the proper positions. Use Caterpillar Electronic Technician (ET) to verify the status of the Shutdown Switch and the User Shutdown parameters. When a shutdown occurs, the keyswitch must be turned to the OFF position for at least 15 seconds prior to attempting to start the engine.
Transmission
Verify that the driveline moves freely.
PTO
Ensure that the PTO system is operating correctly.
Engine Accessories
Remove engine accessories that may prevent the engine cranking and inspect the accessories. The following accessories may prevent the engine cranking:
Batteries
Check the charge on the engines batteries. Charge the batteries, if necessary. Refer to Special Instruction, SEHS7633, Battery Test Procedure. Load test the batteries. Refer to Special Instruction, SEHS9249, Use of 4C-4911 Battery Load Tester for 6, 8 and 12 Volt Lead Acid Batteries.
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Pistons
Inspect the pistons for damage and wear. Replace any damaged parts.
Crankshaft
Inspect the crankshaft and the related components. Inspect the connecting rod bearings and the bearing surfaces on the crankshaft. Make sure that the bearings are in the correct position. Look for worn thrust plates and wear on the crankshaft. Check the counterweight bolts. Replace any damaged parts.
Gear Train
Inspect the condition of the gear train. Replace any damaged parts. Inspect the ywheel and the ywheel bolts. Inspect the engine oil lters for nonferrous material. Flaking of nonferrous material could indicate worn gear train bearings.
i02902881
Probable Causes
Accessory equipment Valve train components Pistons Crankshaft Gear train
Recommended Actions
Accessory Equipment
Isolate the source of the noise. Remove the suspect engine accessory. Inspect the suspect engine accessory. Repair the engine accessory and/or replace the engine accessory, if necessary.
Probable Causes
Diagnostic codes and event codes Cold mode operation and cold cylinder cutout Throttle signal Fuel quality Low pressure fuel system
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51 Troubleshooting Section
High pressure fuel system Air inlet and exhaust system Electrical connectors Valve train components
Cold weather adversely affects the characteristics of the fuel. Refer to the Operation and Maintenance Manual for information on improving the characteristics of the fuel during cold weather operation.
Recommended Actions
Diagnostic Codes and Event Codes
Connect Caterpillar Electronic Technician (ET) to the service tool connector. Check for active diagnostic codes and event codes. Look for diagnostic codes that are active or logged. Check for codes that are related to the high pressure fuel system, the low pressure fuel system, and the engine speed/timing circuit. Use the appropriate circuit test to troubleshoot any active codes before continuing. Also, look for event codes that are active or logged. check for codes that are related to the low pressure fuel system. If there is evidence of a problem with the fuel system, repair the low pressure fuel system before continuing. Note: Diagnostic codes that are logged repeatedly could be a sign of intermittent electrical problem. Event codes that are logged repeatedly may be evidence of an impending problem with the engine.
Throttle Signal
Monitor the throttle signal on Cat ET while you actuate the throttle through the entire range of travel. Verify that the throttle signal is smooth from the low idle position to the high idle position.
Fuel Quality
Check the fuel quality. For further information, refer to the engines Operation and Maintenance Manual.
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Test for excess fuel ow through the injectors. Refer to Systems Operation/Testing and Adjusting, Injector Bypass Fuel Flow - Test for detailed information. Check for excess fuel leakage in the fuel rail. Refer to Systems Operation/Testing and Adjusting, Fuel Rail Leakage - Check for detailed information.
Table 17
Event Code Code and Description E362(1) Engine Overspeed E362(2) Engine Overspeed E362(3) Engine Overspeed Conditions which Generate this Code The engine rpm has exceeded the trip point for engine overspeed for the delay time. System Response The code is logged. The Electronic Control Module (ECM) will not power the injectors above the engine high idle speed. The code is logged.
Probable Causes
Turbocharger oil seal Ether starting aid Automatic Retarder Control (ARC)
Recommended Actions
Turbocharger Oil Seal
A turbocharger oil seal that is leaking can provide fuel to an engine that would otherwise not be fueled. The oil is passed into the inlet air supply and to the engine. The engine oil provides the engine with combustible fuel. Remove the inlet air piping from each of the turbocharger compressor housings. Visually inspect the internal portion of each of the compressor housings for engine oil.
Engine Overspeeds
SMCS Code: 1915-035 Use this procedure in order to troubleshoot engine overspeed or use this procedure if one of the following event codes is active. Refer to Troubleshooting, Event Codes for information about event codes. You must access the engine monitoring system on Caterpillar Electronic Technician (ET) in order to view the current trip points for these codes. For information on the engine monitoring system, refer to Troubleshooting, Engine Monitoring System.
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53 Troubleshooting Section
Faulty piston Faulty piston rings Worn cylinder liners Worn valves Faulty cylinder head gasket Damaged cylinder head
2. Locate the problem and perform all necessary repairs. Ensure that the repairs have eliminated the problem.
i02906097
Probable Causes
Diagnostic codes, event codes, and engine derates Air inlet and exhaust system Mechanical engine problem
Recommended Actions
Diagnostic Codes, Event Codes and Engine Derates
Certain diagnostic codes, event codes and/or derates may cause poor performance. Connect Caterpillar Electronic Technician (ET) and check for active codes and/or for logged codes. Troubleshoot any codes that are present before continuing with this procedure. Use Cat ET to check for logged derates. Refer to Troubleshooting, Event Codes for the specic events that are applicable to this application. A status screen on Cat ET will display a derate if a derate is active. Also, use Cat ET to view the histograms for intake manifold air temperatures and turbocharger compressor inlet air pressures. Look for intake manifold air temperatures that are greater than 65 C (149 F) and look for turbocharger compressor inlet air pressures that are less than 75 kPa (11 psi). Check the portion of the histograms at the time of the low power complaint. If a problem is indicated by the histograms, locate the cause of the problem and perform the necessary repairs.
Probable Causes
Vibration damper Engine supports Driven equipment Engine misring or running rough
Recommended Actions
Vibration Damper
Check the vibration damper for damage. Install a new vibration damper, if necessary. Inspect the mounting bolts for damage and/or for wear. Replace any damaged bolts. Refer to the Disassembly and Assembly manual.
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Engine Supports
Inspect the mounts and the brackets while you run the engine through the speed range. Look for mounts and brackets that are loose and/or broken. Tighten all of the mounting bolts. Install new components, if necessary.
Look for diagnostic codes that are active or logged. Check for codes that are related to the high pressure fuel system, the low pressure fuel system, and the engine speed/timing circuit. Use the appropriate circuit test to troubleshoot any active codes before continuing. Also, look for event codes that are active or logged. check for codes that are related to the low pressure fuel system. If there is evidence of a problem with the fuel system, repair the low pressure fuel system before continuing. Note: Diagnostic codes that are logged repeatedly could be a sign of intermittent electrical problem. Event codes that are logged repeatedly may be evidence of an impending problem with the engine.
Driven Equipment
Inspect the mounting bolts for the driven equipment. Inspect the alignment and the balance of the driven equipment. Inspect the coupling. If necessary, disconnect the driven equipment and test the engine.
Probable Causes
Diagnostic codes and event codes Air inlet or exhaust system Atmospheric pressure sensor Intake manifold pressure sensor Fuel quality Low pressure fuel system
Valve lash adjustment
Intake Manifold Pressure Sensor, Fuel Position, and/or FRC Fuel Limit
1. Monitor the status of Fuel Position and Rated Fuel Limit while the engine is operating under full load. If Fuel Position equals Rated Fuel Limit and Fuel Position is less than FRC Fuel Limit, the ECM is providing the correct control. Otherwise, proceed to the next Step. 2. Verify that there are no active diagnostic codes for the intake manifold pressure sensor.
Recommended Actions
Diagnostic Codes and Event Codes
Connect Caterpillar Electronic Technician (ET) to the service tool connector. Check for active diagnostic codes and event codes.
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55 Troubleshooting Section
3. Monitor the status of Intake Manifold Pressure and Intake Manifold #2 Pressure on Cat ET. When the engine is not running, Intake Manifold Pressure and Intake Manifold #2 Pressure should be approximately 0 kPa (0 psi). Note: A problem with the FRC Fuel Limit will only cause black smoke during acceleration. A problem with the FRC Fuel Limit will not cause black smoke during steady state operation.
i02898085
Fuel Quality
Check the fuel quality. For further information, refer to the engines Operation and Maintenance Manual. Cold weather adversely affects the characteristics of the fuel. Refer to the Operation and Maintenance Manual for information on improving the characteristics of the fuel during cold weather operation.
Probable Causes
Diagnostic codes and event codes Starting aids Coolant temperature sensor Low pressure fuel system Cooling system Flash le
Recommended Actions
Diagnostic Codes and Event Codes
Connect Caterpillar Electronic Technician (ET) to the service tool connector. Check for active diagnostic codes and event codes. Look for diagnostic codes that are active or logged. Check for codes that are related to the high pressure fuel system, the low pressure fuel system, and the engine speed/timing circuit. Use the appropriate circuit test to troubleshoot any active codes before continuing. Also, look for event codes that are active or logged. check for codes that are related to the low pressure fuel system. If there is evidence of a problem with the fuel system, repair the low pressure fuel system before continuing. Note: Diagnostic codes that are logged repeatedly could be a sign of intermittent electrical problem. Event codes that are logged repeatedly may be evidence of an impending problem with the engine.
Starting Aids
1. Ensure that the ether canister is not empty or low. Replace the ether canister if the ether canister is empty or low. Refer to Troubleshooting, Ether Starting Aid - Test.
Flash File
Verify that the latest ash le is installed. Refer to Troubleshooting, ECM Software - Install for information.
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2. Use Cat ET in order to verify that the engine has exited cold mode. During cold mode, fuel injection timing is modied. When the engine is in cold mode, the cold cylinder cutout strategy may be active. Cold mode cylinder cutouts may cause variations in vibration and available power. This is normal operation. 3. Check for proper operation of the jacket water heater. Repair the jacket water heater or replace the jacket water heater.
i02894301
Event Code Code and Description E390(1) Fuel Filter Restriction E390(2) Fuel Filter Restriction Conditions which Generate this Code The difference between the ltered fuel pressure and the unltered fuel pressure is greater than the trip point pressure for the programmed delay time. System Response The code is logged. The engine power is derated. The code is logged.
Probable Causes
Secondary fuel lter elements
Recommended Actions
Fuel Filter Elements
1. Replace the fuel lter elements. 2. Prime the fuel system. Refer to the Operation and Maintenance Manual for information. 3. Restart the engine and check for an active event code. 4. If one of the above event codes remains active, check for logged diagnostic codes that are related to the fuel pressure sensors. If logged codes are present, check for intermittent problems in the harness or in the wiring for the fuel pressure sensors. Refer to Troubleshooting, Electrical Connectors - Inspect for information that is related to intermittent electrical problems.
Cooling System
Check for an internal coolant leak into a cylinder and/or the exhaust. Refer to Systems Operation/Testing and Adjusting for information on inspecting the cooling system.
Flash File
Verify that the latest ash le is installed. Refer to Troubleshooting, ECM Software - Install.
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57 Troubleshooting Section
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i02882009
Event Code Code and Description E096(1) High Fuel Pressure Conditions which Generate this Code The fuel pressure is above the programmed trip point for the programmed delay time. System Response The code is logged.
Event Code Description E198(1) Low Fuel Pressure Conditions which Generate this Code The fuel pressure in the engines low pressure system is below the trip point for the programmed delay time. The fuel pressure in the engines low pressure system is below the trip point for the programmed delay time. System Response The code is logged.
Probable Causes
Fuel pressure regulating valve Fuel lines
Recommended Actions
Fuel Pressure Regulating Valve
A improperly operating fuel pressure regulating valve may cause high fuel pressure. If a problem is suspected, inspect the return fuel pressure regulating valve. Clean any contamination or debris that may keep the regulating valve from operating properly. If debris is present, nd the source of the contamination. Replace the return fuel pressure regulating valve if the valve is worn or damaged.
Probable Causes
Fuel level Vent port at the fuel tank Diagnostic codes and event codes Fuel lters Fuel pressure sensors Fuel pressure regulating valve Fuel priming pump Fuel transfer pump
Fuel Lines
Inspect the fuel lines for damage. A restricted return fuel line can increase fuel pressure.
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Recommended Actions
Fuel Level
Visually inspect the fuel level in the fuel tank. Ensure that the fuel tank contains enough fuel in order to operate the engine.
Increase the engine speed from low engine idle to high engine idle while you monitor the parameters. Ensure that the value of each of the parameters uctuates with the change in the speed of the engine. Ensure that the value of each of the sensors remains reasonable as the fuel pressure increases. Refer to Systems Operation/Testing and Adjusting for the correct pressure values. If a problem with one of the sensors is suspected, refer to Troubleshooting, Sensor Signal (Analog, Active) - Test for details that are related to troubleshooting a problem with the sensor.
Fuel Filters
Replace clogged fuel lters.
Fuel Transfer Pump Inlet Pressure (absolute) Unltered Fuel Pressure (absolute) Fuel Pressure (absolute)
Check the value of each parameter while the engine is at low idle. Ensure that the value for each of the parameters is reasonable.
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59 Troubleshooting Section
Use Cat ET to monitor the Fuel Pressure (absolute) status parameter during engine starting. Ensure that the fuel pressure is at least 350 kPa (51 psi) (gauge) during engine cranking. Also ensure that the fuel pressure remains above 350 kPa (51 psi) (gauge) after the engine has started. If the other components in the fuel system are operating within specications, and the fuel pressure decreases after starting the engine, replace the fuel transfer pump.
i02894302
Check for the proper operation of the fuel control valve. Perform the following procedure: 1. Use Cat ET to check the status of the Percent Fuel Position parameter. With the engine shutdown, The Percent Fuel Position parameter will read 0 percent. If the Percent Fuel Position does not read zero percent with the engine shutdown, there is a problem with the fuel control valve. Replace the high pressure fuel pump. 2. Start the engine. Run the engine at low engine idle. 3. Use Cat ET to monitor the operation of the parameters that are for fuel control valve: a. Monitor the Fuel Actuator Position Command parameter and the Percent Fuel Position parameter. b. Monitor the Desired Fuel Rail Pressure parameter and the Fuel Rail Pressure parameter. 4. Vary the engine speed and the engine load. Continue to monitor the parameters as the engine speed and the engine load is changed.
Probable Causes
Diagnostic codes and event codes Fuel rail pressure sensor High pressure fuel pump
Recommended Actions
Diagnostic Codes and Event Codes
Connect Cat ET to the service tool connector. Check for active diagnostic codes and event codes. Look for active diagnostic codes that are related to the high pressure fuel system and the low pressure fuel system. Use the appropriate circuit test to troubleshoot any active codes before continuing.
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As you vary the engine speed and the engine load, the Fuel Actuator Position Command parameter and the Percent Fuel Position parameter will change as the engine speed and load changes. During the proper operation of the fuel control valve, the actual position will closely match the desired position. If the actual position does not closely match the desired position during testing, replace the high pressure fuel pump. Refer to the Disassembly and Assembly manual for details. If the actual position closely matches the desired position during testing, the fuel control valve is OK. The high pressure fuel pump is generating too much pressure for the high pressure fuel system. Replace the high pressure fuel pump. Refer to the Disassembly and Assembly manual for details.
i02894311
Recommended Actions
Diagnostic Codes and Event Codes
Connect Cat ET to the service tool connector. Check for active diagnostic codes and event codes. Look for active diagnostic codes that are related to the sensors for the low pressure fuel system. Use the appropriate circuit test to troubleshoot any active codes before continuing. Also, look for active event codes that are related to the low pressure fuel system. Ensure that a low pressure event has not been logged repeatedly for the low pressure fuel system. If there is evidence of a problem with the fuel system, repair the low pressure fuel system before continuing.
Event Code Description E398(1) Low Fuel Rail Pressure E398(2) Low Fuel Rail Pressure Conditions which Generate this Code The fuel rail pressure is below the trip point pressure for the programmed delay time. System Response The code is logged. The code is logged. Engine power is derated.
Probable Causes
Diagnostic codes and event codes Low pressure fuel system Leakage in the high pressure fuel rail Fuel rail pressure sensor
1. With the engine shutdown, use Cat ET to check the status of the Fuel Rail Pressure (absolute). After the engine has been shutdown for ten minutes, the Fuel Rail Pressure (absolute) will be less than 5,000 kPa (725 psi) (gauge).
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61 Troubleshooting Section
Note: If the pressure is not less than 5,000 kPa (725 psi) (gauge) after ten minutes, vent the pressure from the fuel system. Refer to Systems Operation/Testing and Adjusting, Fuel Rail Pressure - Release for information. If the sensor reports that the pressure that is in the fuel rail is less than 5,000 kPa (725 psi) (gauge) after venting the fuel system, the fuel rail pressure sensor and the sensors electrical circuit is OK. If the sensor reports that the pressure that is in the fuel rail does not fall to less than 5,000 kPa (725 psi) (gauge) after venting the fuel system, there may be a problem with the fuel rail pressure sensor or the electrical circuit for the sensor. Perform the necessary repairs. Refer to Troubleshooting, Sensor Signal (Analog, Active) - Test for information that is related to testing the circuit.
If the actual position does not closely match the desired position during testing, replace the high pressure fuel pump. Refer to the Disassembly and Assembly manual for details. If the actual position closely matches the desired position during testing and the fuel rail pressure remains low, the fuel control valve is OK. The high pressure fuel pump is not generating the correct fuel pressure. Replace the high pressure fuel pump. Refer to the Disassembly and Assembly manual for details.
i02882715
Event Code Description E363(1) High Fuel Temperature Warning E363(2) High Fuel Temperature Derate E770(1) High Fuel Rail Temperature Warning E770(2) High Fuel Rail Temperature Derate Conditions which Generate this Code The fuel temperature of the low pressure fuel system is above the trip point for the programmed delay time. The fuel temperature of the high pressure system is above the trip point for the programmed delay time. System Response The code is logged. The code is logged. Engine power will be derated. The code is logged. The code is logged. Engine power will be derated.
Probable Causes
Diagnostic codes and event codes Fuel pressure regulating valve Fuel level Fuel temperature sensors
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Recommended Actions
Diagnostic Codes and Event Codes
Connect Cat (ET) to the service tool connector. Check for active diagnostic codes and event codes. Look for active diagnostic codes that are related to the high pressure fuel system and the low pressure fuel system. Use the appropriate circuit test to troubleshoot any active diagnostic codes before continuing. Also, check for logged diagnostic codes. Use the time stamps that are for the logged events in order to determine when the events have been active. If the E770 was active and the E363 was not active, there may be a problem with the high pressure fuel pump. Perform the following procedure: 1. Start the engine. Run the engine until normal operating temperature is achieved. 2. Use Cat ET to monitor the following parameters:
Event Code Description E2172(1) Low Fuel Transfer Pump Inlet Pressure Conditions which Generate this Code The gauge pressure (vacuum) of the fuel at the inlet of the fuel transfer pump drops below 50 kPa (7 psi) for the programmed delay time. System Response The code is logged.
Probable Causes
Fuel shutoff valve Fuel level Primary fuel lter/water separator Fuel lines
Recommended Actions
Fuel Shutoff Valve
Check that the fuel shutoff valve is in the ON position.
Fuel Level
Check the fuel level in the fuel tanks. Typically, as the level of the fuel in the tank decreases, the fuel temperature will increase.
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Fuel Level
Visually inspect the fuel level in the fuel tank. Ensure that the fuel tank contains enough fuel in order to operate the engine.
Table 25
Event Code Description Default Conditions which Generate this Code The inlet air restriction is above the trip point pressure for the delay time. System Response
E583(1) High Air Inlet #1 Differential Pressure E583(2) High Air Inlet #1 Differential Pressure E584(1) High Air Inlet #2 Differential Pressure E584(2) High Air Inlet #2 Differential Pressure E585(1) High Air Inlet #3 Differential Pressure E585(2) High Air Inlet #3 Differential Pressure E586(1) High Air Inlet #4 Differential Pressure E586(2) High Air Inlet #4 Differential Pressure
The code is logged. Engine power will be derated. The code is logged. The code is logged. Engine power will be derated. The code is logged. The code is logged. Engine power will be derated. The code is logged. The code is logged. Engine power will be derated. The code is logged.
Fuel Lines
Check the fuel systems suction lines from the tank to the electric fuel priming pump. Check the engines fuel lines from the electric fuel priming pump to the fuel transfer pump. Check fuel lines for the following problems: restrictions, collapse, and pinched line. Ensure that the lines are not routed through pinch points. If any of the lines are suspect, repair the lines and/or replace the lines. Check all of the fuel lines for debris. If debris is found in the fuel lines, locate the source of the contamination. Correct the problem. Clean the fuel system before returning the engine to service. Check the fuel tank for foreign objects which may block the fuel supply. Prime the fuel system after replacement of the fuel lters or fuel injectors. Prime the fuel system after work has been performed on the low pressure fuel supply circuit. Note: Cold weather adversely affects the characteristics of the fuel. Refer to the Operation and Maintenance Manual for information on improving the characteristics of the fuel during cold weather operation.
i02881193
The inlet air restriction is above the trip point pressure for the delay time.
The inlet air restriction is above the trip point pressure for the delay time.
The inlet air restriction is above the trip point pressure for the delay time.
Probable Causes
Air lter element Atmospheric pressure sensor, turbocharger
compressor inlet pressure sensors, and/or sensor circuits
Recommended Actions
Air Filter Element
Check the air intake system for plugged air lters or for damaged air lters. If the engine is equipped with an air intake precleaner, verify the proper operation of the air intake precleaner.
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Atmospheric Pressure Sensor, Turbocharger Compressor Inlet Pressure Sensors, and/or Sensor Circuits
Use Cat ET to compare the status of the following parameters while the engine is off:
Table 26
Event Code Code and Description E539(1) High Intake Manifold Air Temperature E539(2) High Intake Manifold Air Temperature Conditions which Generate this Code The intake manifold air temperature is above the trip point for the delay time. System Response The code is logged. The code is logged. Engine power is derated.
Turbocharger #2 Compressor Inlet Pressure Turbocharger #3 Compressor Inlet Pressure Turbocharger #4 Compressor Inlet Pressure
Note: The status for air lter restriction is a calculated value. Before Cat ET reports the status parameters for air lter restriction, the engine must be running for three minutes. Cat ET will report Conditions Not Met for these parameters prior to this delay time. Check that the sensors are correctly wired. Cat ET will report the status for Atmospheric Pressure as the barometric pressure that is for the surrounding area. While the engine is off, the readings for all four of the turbocharger compressor inlet pressure sensors will be approximately the same value that is reported by the atmospheric pressure sensor. If the readings do not agree, troubleshoot the sensor circuit(s) for the suspect sensor. Refer to Troubleshooting, Sensor Signal (Analog, Active) Test.
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Probable Causes
High coolant temperature High ambient air temperature Air inlet restriction Exhaust restriction Altitude Engine Overload
Recommended Actions
High Coolant Temperature
A high coolant temperature will increase the intake manifold air temperature. Verify that the cooling system is lled to the proper level. If the coolant level is too low, air will get into the cooling system. Air in the cooling system will cause a reduction in coolant ow. Check the operation of the cooling fan. A fan that is not turning at the correct speed can cause improper air speed across the aftercooler core. The lack of proper air ow across the aftercooler core can cause the intake air not to cool to the proper temperature. Check for air in the cooling system. Air can enter the cooling system in different ways. The most common causes of air in the cooling system are the incorrect lling of the cooling system and combustion gas leakage into the cooling system. Combustion gas can get into the system through inside cracks, a damaged cylinder head, or a damaged cylinder head gasket.
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Recommended Actions
Oil Leaks
Check the engine compartment for oil leaks. Repair any oil leaks that are identied.
Oil Level
Check the engine oil level. Too much oil in the engine crankcase can cause the engine to consume oil. Remove excessive engine oil from the crankcase. Ensure that the dipstick is properly calibrated and/or that the dipstick is correct for the application. Calibrate the dipstick and/or replace the dipstick.
Turbocharger Seal
Check for turbocharger shaft seal leakage. Remove the air inlet piping and the exhaust outlet piping from the turbocharger. Check the compressor wheel and the turbine for evidence of an oil leak. If necessary, repair the turbocharger or replace the turbocharger. Refer to Systems Operation/Testing and Adjusting.
Exhaust Restriction
Check for a restriction in the exhaust system. A restriction of the air that is coming out of the engine can cause high cylinder temperatures.
Altitude
Consider high altitude operation. The cooling capability of the cooling system is reduced at higher altitudes. A pressurized cooling system that is large enough to keep the coolant from boiling must be used. Make sure that the settings for the engine are correct for the altitude.
Engine Overload
The engine may be running in the lug condition. When the load that is applied to the engine is too large, the engine will run in the lug condition. When the engine is running in the lug condition, engine rpm does not increase with an increase of fuel. This lower engine rpm causes a reduction in coolant ow through the system.
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Faulty piston Worn piston rings Worn cylinder bores Worn valves Faulty cylinder head gasket Damaged cylinder head
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Probable Causes
Oil leaks Oil level Turbocharger seal Internal engine wear
Probable Causes
Engine oil cooler core Cylinder head gasket Cylinder head Cylinder liner
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Cylinder block
Recommended Actions
Engine Oil Cooler Core
1. Check for leaks in the oil cooler core. If a leak is found, install a new oil cooler core. Refer to the Disassembly and Assembly manual. 2. Drain the crankcase and rell the crankcase with clean engine oil. Install new engine oil lters. Refer to the Operation and Maintenance Manual.
Note: For additional information, refer to , REHS3007, Determining the Cause of Fuel Dilution of Engine Oil.
Recommended Actions
Fuel Injector Seals
Look for signs of damage to the seals for the fuel injectors. Replace any seals that are leaking.
Cylinder Head
Check for cracks in the cylinder head. If a crack is found, repair the cylinder head and/or replace the cylinder head. Refer to the Disassembly and Assembly manual.
Cylinder Liner
Check for cracked cylinder liners. Replace any cracked cylinder liners. Refer to the Disassembly and Assembly manual.
Cylinder Block
Inspect the cylinder block for cracks. If a crack is found, repair the cylinder block or replace the cylinder block.
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Probable Causes
Fuel injector seals Fuel injector tip Fuel transfer pump seal
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Table 27
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Event Code Code and Description E99(1) Engine Oil Filter Restriction Warning Conditions which Generate this Code The difference between the ltered oil pressure and the unltered oil pressure is greater than the trip point pressure. System Response The code is logged.
Probable Causes
Oil lter Oil pressure sensors and/or circuits Oil lter bypass valve
Event Code Code and Description E360(1) Low Engine Oil Pressure E360(3) Low Engine Oil Pressure Conditions which Generate this Code The engine oil pressure is below the trip point and the delay time has expired. System Response The code is logged. The code is logged. Engine power is derated. If the vehicles ground speed is zero and the parking brake is set, the engine will be shut down.
Recommended Actions
Oil Filters
Check the oil lter differential pressure. If the oil lter differential pressure is too high, the problem is probably a plugged oil lter. Replace the oil lter elements. Inspect the condition of the oil lters. Replace any suspect oil lter.
Probable Causes
Low engine oil level Incorrect viscosity Contaminated engine oil Faulty oil pressure sensors Poor circulation of the engine oil Worn components
Recommended Actions
Low Engine Oil Level
Check the oil level. Add oil, as needed.
Incorrect Viscosity
Make sure that the engine is supplied with the correct engine oil. For the correct engine oil to use, refer to the Operation and Maintenance Manual.
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Worn Components
Excessive clearance at the crankshaft or camshaft bearings will cause low engine oil pressure. Also, inspect the clearance between the rocker arm shafts and the rocker arms. Check the engine components for excessive clearance. Obtain an analysis of the engine oil. Check the analysis for the level of wear metals in the engine oil.
i02880700
Event Code Code and Description E197(1) High Engine Oil Temperature E197(2) High Engine Oil Temperature E197(3) High Engine Oil Temperature Conditions which Activate the Code The engine oil temperature has exceeded the trip point and the delay time has expired. System Response The code is logged. The code is logged. Engine power is derated. The code is logged.
Probable Causes
Engine oil level Engine oil cooler bypass valve Engine oil cooler core Engine coolant temperature
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Recommended Actions
Engine Oil Level
Check the oil level. Add oil, as needed.
Recommended Actions
Engine Derate
Connect Caterpillar Electronic Technician (ET) and check for logged derate events that derate engine power. An engine derate indicator will appear on Cat ET if an active engine derate is occurring.
Probable Causes
Engine derate Low pressure fuel system High pressure fuel system Cold mode operation and cold cylinder cutout Throttle signal Air inlet and exhaust system Flash le Air shutoff valve (if applicable)
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Check the high pressure fuel system for leaks: Test for excess fuel ow through the injectors. Refer to Systems Operation/Testing and Adjusting, Injector Bypass Fuel Flow - Test for detailed information. Check for excess fuel leakage in the fuel rail. Refer to Systems Operation/Testing and Adjusting, Fuel Rail Leakage - Check for detailed information.
i02881185
Event Code Code and Description Conditions which Generate this Code The minimum pressure for the engine prelube sequence was not achieved. This event is disabled while the oil temperature is above 50 C (122 F). System Response
Throttle Signal
Use Cat ET in order to monitor the status of the throttle. Observe the throttle position. Verify that the throttle position is smooth from low idle to high idle. The throttle position should reach at least 90 percent at high idle.
E233(2) Low Engine Pre-lube Pressure
Probable Causes
Engine oil level Electrical power to the prelube pump motor Inadequate prelubrication pressure
Recommended Actions
Engine Oil Level
Check the engine oil level. Refer to the Operation and Maintenance Manual for details. If necessary, add engine oil to the engine. Inspect the lubrication system for leaks.
Flash File
Verify that the latest ash le has been installed in the engines Electronic Control Module (ECM).
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Connect Cat ET to the service tool connector. Check for active diagnostic codes and logged diagnostic codes that are related to the engines prelubrication pump. Troubleshoot any codes that are active or logged before continuing. Refer to Troubleshooting, Prelubrication - Test for information that is related to the pump circuit.
Table 31
Event Code Code and Description E245(1) High Right Turbo Turbine Inlet Temperature E245(2) High Right Turbo Turbine Inlet Temperature E245(3) High Right Turbo Turbine Inlet Temperature E246(1) High Left Turbo Turbine Inlet Temperature E246(2) High Left Turbo Turbine Inlet Temperature E246(3) High Left Turbo Turbine Inlet Temperature The exhaust temperature is above the trip point temperature. The exhaust temperature is above the trip point temperature. Conditions which Generate this Code System Response The code is logged.
Probable Causes
Diagnostic codes and event codes Air inlet and exhaust system Fuel injectors Aftercooler Accessory equipment
Recommended Actions
Diagnostic Codes and Event Codes
Connect Cat (ET) to the service tool connector. Check for active diagnostic codes and event codes. Look for active diagnostic codes that are related to the high pressure fuel system and the low pressure fuel system. Use the appropriate circuit test to troubleshoot any active codes before continuing.
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Also, look for active event codes that are related to a low fuel pressure for the high pressure fuel rail. Ensure that a low pressure event has not been logged repeatedly for the high pressure fuel system. If a problem with the high pressure fuel system is suspected, refer to Troubleshooting, Fuel Rail Pressure is Low for troubleshooting information.
i02603462
Probable Causes
Lubrication Valve lash Valve train components
Recommended Actions
Lubrication
1. Remove the valve mechanism covers. Refer to the engines Disassembly and Assembly manual. 2. Check the lubrication in the valve compartment. Ensure that there is adequate engine oil ow in the valve compartment. The passages for the engine oil must be clean.
Fuel Injectors
Faulty injectors that deliver too much fuel will increase exhaust temperatures. Connect Cat ET in order to determine if any diagnostic codes for the injector solenoids are present. Perform the Injector Solenoid Test. Check that the injector solenoids are OK on Cat ET. Perform the Cylinder Cutout Test. Locate the misring cylinder and correct the problem. Perform the Fuel System Verication Test. Identify any problem injectors and perform the necessary repairs. Refer to Troubleshooting, Injector Solenoid - Test.
Valve Lash
Adjust the engine valve lash. Refer to the engines Systems Operation/Testing and Adjusting manual.
Rocker arms Pushrods Valve lifters Camshaft Valve stems Rocker shafts
2. Check the components for the following conditions: abnormal wear, excessive wear, straightness, and cleanliness. Replace parts, if necessary. Note: If you replace the camshaft, you must also replace the valve lifters. 3. Adjust the engine valve lash. Refer to the engines Systems Operation/Testing and Adjusting manual.
Aftercooler
Normal intake manifold pressure with high exhaust temperature can be caused by blockage of the ns of the aftercooler core. If the application has an aftercooler, check the aftercooler for plugging. Check for blockage in the cores of the aftercooler.
Accessory Equipment
Check all ywheel and damper driven equipment for proper operation. Ensure that the accessory equipment is not lugging down the engine.
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i02643299
Probable Cause
Valve Components
Recommended Actions
Valve components
1. A valve rotator that is cracked or a valve rotator that is broken is an indication of an engine overspeed. Determine the cause of the engine overspeed. Repair the condition. 2. Inspect the following components for damage:
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Circuit Tests
i02899462
Prior to troubleshooting any problems with the coolant level sensor, use Caterpillar Electronic Technician (ET) to check the installation status for the sensor. The coolant level sensors conguration parameter must be set to Installed in order for the ECM to monitor the signal from the sensor. The activation of an event code and/or a warning lamp is probably caused by a low coolant level. The next likely cause is a problem with the wiring harness, a connector, or the sensor. The least likely cause is a problem with the ECM. Before you perform this test procedure ensure that the coolant level is OK.
Illustration 30 Components of the coolant level sensor (1) Sensor (2) Sensor probe (brass dowel) (3) Plastic cover
g01150024
Coolant level sensor (1) contains no moving parts. The sensor provides the same function as a switch. The state of the switch is dependent on the capacitance value that is detected at the probe of the sensor. The sensor contains a probe (2) that is covered with plastic (3). When the sensors probe is immersed in coolant, the sensor senses a particular capacitance. The sensors electronics react by sinking the signal to the sensor return (ground). When the probe is not immersed in coolant, approximately +5 VDC is sourced to the signal wire. When this condition is detected by the Electronic Control Module (ECM), an event code is activated.
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g01443747
Pressurized System: Hot coolant can cause serious burns. To open the cooling system ller cap, stop the engine and wait until the cooling system components are cool. Loosen the cooling system pressure cap slowly in order to relieve the pressure.
Illustration 33
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Location of the connectors at the ECM that are for the 16 cylinder engines (typical left front engine view) (5) J2/P2 ECM connector (6) Left rail connector (7) J1/P1 ECM connector
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Location of the coolant level sensor (typical left front engine view)
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Illustration 34
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Location of the connectors at the ECM that are for the 20 cylinder engines (typical front side engine view) (5) J2/P2 ECM connector (6) Left rail connector (7) J1/P1 ECM connector
Illustration 36
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Terminal locations at the P2 ECM connector for the coolant level sensor (P2-14) Digital return (P2-29) Digital supply
g01443791
B. Thoroughly inspect the connector for sensor (1), ECM connectors (4), rail connector (5), and machine connector (6). Refer to Troubleshooting, Electrical Connectors - Inspect for details.
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Illustration 38
g01443913
Terminal locations at the left rail connector for the coolant level sensor (Terminal 28) Digital supply (Terminal 50) Coolant level (Terminal 67) Digital return Illustration 37
g01443908
Terminal locations at the P1 ECM connector for the coolant level sensor (P1-44) Coolant level
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D. Check the allen head screw on each ECM connector for the proper torque. Refer to Troubleshooting, Electrical Connectors - Inspect for the correct torque values. Expected Result: All connectors, pins, and sockets are completely coupled and/or inserted, and the harness and wiring are free of corrosion, of abrasion or of pinch points. Results:
Illustration 39
g01443926
Terminal locations at the machine interface connector for the coolant level sensor (Terminal 16) Coolant level (Terminal 33) Digital supply (Terminal 37) Digital return
The supply voltage is reaching the sensor. Proceed to Test Step 3. 0.4 VDC.
Terminal locations at the harness connector for the coolant level sensor (Terminal A) Digital supply (Terminal B) Digital return (Terminal C) Sensor signal
C. Perform a 45 N (10 lb) pull test on each of the wires that are associated with the circuit for the coolant level sensor.
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Test Step 3. Disconnect the Coolant Level Sensor and Monitor the Status for Coolant Level
A. Disconnect the harness connector for the coolant level sensor. B. Restore electrical power to the ECM. C. Monitor the status of Coolant Level on Cat ET. Note: Wait at least 30 seconds for activation of the status indicator. D. Remove electrical power from the ECM. Expected Result: The status changes from OK to LOW when the sensor is disconnected. Results:
Expected Result: The status changes from LOW to OK when the jumper wire is installed. Results:
when the jumper wire is installed. The ECM and the wiring harness to the coolant level sensor are OK. Repair: Perform the following procedure:
Pressurized System: Hot coolant can cause serious burns. To open the cooling system ller cap, stop the engine and wait until the cooling system components are cool. Loosen the cooling system pressure cap slowly in order to relieve the pressure. 1. Drain the coolant below the level of the coolant level sensor. 2. Restore electrical power to the ECM. 3. Monitor the status of Coolant Level on Cat ET. Note: Wait at least 30 seconds for activation of the status indicator. 4. Remove electrical power from the ECM. If the status of the Coolant Level is OK, replace the sensor. If the status for the coolant level is LOW, the circuit for the coolant level sensor is OK. There may be an intermittent problem in the harness or in a connector. Fill the cooling system according to the procedure in the Operation and Maintenance Manual. Return the engine to service. If an intermittent electrical problem is suspected, refer to Troubleshooting, Electrical Connectors - Inspect for troubleshooting information. STOP.
disconnected. There may be a problem with the coolant level sensor. Proceed to Test Step 4. is disconnected. The problem is between the ECM and the harness connector. There may be a problem with the ECM. Proceed to Test Step 5.
Test Step 4. Short the Signal Wire to Ground and Monitor the Status for Coolant Level
A. Remove electrical power from the ECM. B. Fabricate a jumper wire that is long enough to create a short circuit between two terminals at the coolant level sensors harness connector. Crimp connector pins to each end of the jumper wire. C. Install the jumper wire between terminals B (digital return) and C (sensor signal) on the harness side of the connector for the coolant level sensor. D. Restore electrical power to the ECM. E. Monitor the status of Coolant Level on Cat ET while the jumper wire is installed. Note: Wait at least 30 seconds for activation of the status indicator. F. Remove electrical power from the ECM. G. Remove the jumper wire. Connect the harness connector for the coolant level sensor.
the status on Cat ET. The problem is between the ECM and the harness connector. There may be a problem with the ECM. Proceed to Test Step 5.
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C. Fabricate a jumper wire that is long enough to provide a test circuit between the ECM connector and the sensor connector. Crimp a connector pin to one end of the jumper wire. D. Install the jumper wires connector pin into terminal C on the harness side of the connector for the coolant level sensor. E. Measure the resistance between terminal P1-44 and the loose end of the jumper wire. The correct resistance measurement is a short circuit. Remove the jumper wire. Leave the sensor connector disconnected. Expected Result: The measurement indicates that a short circuit exists for the signal wire. Results:
Table 32
Resistance Measurements for the Coolant Level Circuit Connector and Terminal Terminal All of the terminals on the P1 connector P1-44 (coolant level) All of the other terminals on the P2 connector Engine ground stud
Expected Result: Each check of the resistance indicates an open circuit. Results:
open circuit. There is not a short circuit to another wire in the harness. Proceed to Test Step 7. does not indicate an open circuit. There is a short to another wire in the harness. The problem may be with a connector. Repair: Repair the wire and/or the connector, when possible. Replace damaged parts, if necessary. Verify that the problem is resolved. STOP.
There is not an open circuit in the harness wire for the sensor signal. Proceed to Test Step 6. short circuit.
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Expected Result: The status is LOW when the jumper wire is not connected. The status is OK when the jumper wire is connected. Results:
If Caterpillar Electronic Technician (ET) will not communicate with the ECM, refer to Troubleshooting, Electronic Service Tool Does Not Communicate before you begin this procedure. The procedure veries that electrical power is being supplied to the engine ECM and to the service tool connector. The data links provide a communication link between the various control modules on the application. Cat ET may display the following error message: The version of the ECM is not recognized and the integrity of the changed parameters and displayed data is not guaranteed. If this message is displayed, the ash le in the ECM may be newer than the version of Cat ET, or the latest version of Cat ET has not been installed. You must correct this condition prior to continuing with this procedure.
not connected. The status is OK when the jumper wire is connected. Repair: The ECM is properly reading the switch input. There may be an intermittent problem in the harness or in a connector. If an intermittent electrical problem is suspected, refer to Troubleshooting, Electrical Connectors - Inspect for troubleshooting information. STOP.
Brake electronic control module Chassis electronic control module Engine Control Module (ECM) Service tool connector Transmission electronic control module Vital Information Management System (VIMS)
This procedure veries the integrity of the CAN data link between the following components:
Temperature control module Engine Control Module (ECM) Fuel control valve Service tool connector
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Illustration 43
g01444857
A. Perform a visual inspection of the wiring between the P1 and P2 ECM connectors and the service tool connector. Look for these problems:
Location of the connectors at the ECM for the 16 cylinder engines (typical left side engine view) (1) (2) (3) (4) Right rail connectors J2/P2 ECM connector Left rail connectors J1/P1 ECM connector
Harness damage that is caused by chang Harness damage that is caused by excessive
heat B. Inspect the condition of the service tool connector: a. Look for moisture on the wiring and on the connector.
g01444702
Location of the connectors at the ECM for the 20 cylinder engines (typical left side engine view) (1) (2) (3) (4) Right rail connectors J2/P2 ECM connector Left rail connectors J1/P1 ECM connector
(A) +Battery (B) Battery (C) CAN shield (D) Cat Data Link + (E) Cat Data Link (F) CAN data link (G) CAN data link +
b. Pull on the wires that are associated with the data links. This veries that the wire is properly attached to the terminal and that the terminal is properly inserted into the connector.
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C. Inspect the P1 and P2 ECM connectors: a. Look for moisture on the wiring and on the connector.
Illustration 47
g01444732
Terminal locations at the P1 ECM connector that are for the data link (P1-8) Cat Data Link + (P1-9) Cat Data Link (P1-34) CAN data link (P1-42) CAN shield (P1-48) +Battery (P1-50) CAN data link + (P1-52) +Battery (P1-53) +Battery (P1-55) +Battery (P1-57) +Battery (P1-61) Battery (P1-63) Battery (P1-65) Battery (P1-67) Battery (P1-69) Battery (P1-70) Keyswitch
Illustration 48
g01326307
Terminal locations at the P2 ECM connector that are for the data link (P2-34) CAN data link (P2-42) CAN shield (P2-50) CAN data link +
b. Pull on the wires that are associated with the data links. This veries that the wire is properly crimped to the terminal and that the terminal is properly inserted into the connector. D. Inspect the left rail connectors and the right rail connectors: a. Look for moisture on the wiring and on the connector.
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Illustration 49 (Terminal (Terminal (Terminal (Terminal (Terminal 48) 49) 58) 60) 61) Cat Data Link + Cat Data Link CAN shield CAN data link CAN data link +
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Terminal locations at the left rail connector that are for the data link
Illustration 50
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Terminal locations at the right rail connector that are for the data link (Terminal 8) CAN shield (Terminal 10) CAN data link (Terminal 11) CAN data link +
b. Pull on the wires that are associated with the data links. This veries that the wire is properly crimped to the terminal and that the terminal is properly inserted into the connector. E. Inspect the machine interface connectors and the connectors at the various controllers: a. Look for moisture on the wiring and on the connector.
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Illustration 53
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Terminal locations at the connector for the temperature control module that are for the data link (Terminal 4) CAN data link + (Terminal 6) CAN data link (Terminal 9) CAN shield
b. Pull on the wires that are associated with the data links. This veries that the wire is properly crimped to the terminal and that the terminal is properly inserted into the connector. Expected Result:
Illustration 51
g01444812
Terminal locations at the machine interface connector that are for the data link (Terminal (Terminal (Terminal (Terminal (Terminal 13) 14) 38) 35) 36) Cat Data Link + Cat Data Link CAN shield CAN data link CAN data link +
All connectors, pins and sockets are completely coupled and/or inserted and the harness and wiring are free of corrosion, of abrasion or of pinch points. Results:
Illustration 52
g01326328
Terminal locations at the connector for the fuel control valve that are for the data link (Terminal 4) CAN data link + (Terminal 6) CAN data link (Terminal 7) CAN shield
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Results:
P1-8 (Cat Data Link +) and P1-52 (+Battery) P1-9 (Cat Data Link -) and P1-52 (+Battery) P1-50 (Global CAN data link +) and P1-52
(+Battery) (+Battery) (+Battery) (+Battery)
P1-34 (Global CAN data link -) and P1-52 P2-12 (Local CAN data link +) and P1-52 P2-11 (Local CAN data link -) and P1-52
Expected Result: Each measurement indicates an open circuit. Results:
Test Step 3. Check the Wiring for the Data Links for a Short Circuit
A. Turn the keyswitch OFF. B. Disconnect the negative cable from the vehicles battery. C. Disconnect the P1 and P2 ECM connectors. D. Measure the resistance between the following terminals:
Test Step 4. Check the Wiring for the Data Links for an Open Circuit
A. Connect a jumper wire between terminals P1-8 and P1-9. B. At the service tool connector and the connector for each control module, measure the resistance between the terminals for the CAT Data Link. C. Connect a jumper wire between terminals P1-34 and P1-50.
P1-8 (Cat Data Link +) and P1-61 (-Battery) P1-9 (Cat Data Link -) and P1-61 (-Battery) P1-50 (Global CAN data link +) and P1-61
(-Battery) (-Battery)
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89 Troubleshooting Section
D. At the service tool connector and the connector for each control module that is on the global network, measure the resistance between the terminals for the CAN data link. E. Connect a jumper wire between terminals P2-11 and P2-12. F. At the service tool connector and the connector for each control module that is on the local network, measure the resistance between the terminals for the CAN data link. Expected Result: All of the resistance measurements indicates that continuity exists in the circuit. Results:
Results:
Repair: Determine the cause of the missing termination resistor. Repair the problem, when possible. Replace parts, if necessary. Verify that the problem is resolved. STOP.
Test Step 5. Check the Termination Resistors for the J1939 Data Link
Note: Perform this test step only if you are troubleshooting a problem with the CAN data link. A. Ensure that all of the control modules are disconnected from the data link. At the service tool connector, measure the resistance between the terminals for the CAN data link. Expected Result: The resistance is between 45 Ohms and 75 Ohms.
90 Troubleshooting Section
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Table 33
Diagnostic Codes Table Description 168-0 Electrical System Voltage high most severe (3) Conditions which Generate this Code The battery supply voltage is greater than 32 VDC for nine seconds. The engines ECM has been powered for 30 seconds. The battery supply voltage is less than 18 VDC for 0.5 seconds. The engines ECM has been powered for three seconds. The engine has started and the engine is running. The engine is running. Three voltage readings in the last seven seconds were below 6 VDC. The voltage then returned to above 9 VDC. Three voltage readings for the keyswitch for the last one second were below an acceptable voltage. The engine is not cranking. System Response The code is logged.
The code is logged. Engine parameters for most of the powered sensors will revert to default values.
Use this test if there are intermittent engine shutdowns or if a difculty in starting is not accompanied by loss of electrical accessories. Engine shutdowns that are accompanied by a loss of other electrical accessories indicate a problem in the keyswitch. This does not indicate a problem in the wiring at the ECM. Verify that there are no problems with the starting system or with the charging system before you use this test. Unswitched battery voltage is supplied through the machine connector to the ECM. The voltage is supplied to terminals at P1-48, P1-52, P1-53, P1-55, and P1-57 of the ECM connector . The negative battery is supplied to the ECM at P1-61, P1-63, P1-65, P1-67, and P1-69. The ECM receives battery voltage from the keyswitch at P1-70 when the keyswitch is in the ON position or in the START position. When the ECM detects battery voltage at this input, the ECM will power up. When battery voltage is removed from this input, the ECM will power down. The engine ECM requires the keyswitch to be in the ON position in order to maintain communications with Caterpillar Electronic Technician (ET).
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92 Troubleshooting Section
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Illustration 55
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Illustration 57 Location of the connectors at the fuel control valve (4) Connectors for the fuel control valve
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Locations of the connectors at the ECM that are for the 16 cylinder engines (typical left front engine view) (1) Right rail connector (2) Left rail connector (3) J1/P1 ECM connectors
Illustration 58 Illustration 56
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Location of the machine interface connectors (left rear engine view) (5) Machine interface connectors Locations of the connectors at the ECM that are for the 20 cylinder engines (typical left front engine view) (1) Right rail connector (2) Left rail connector (3) J1/P1 ECM connectors
B. Thoroughly inspect connectors (1), (2), (3), (4), and (5). Inspect all of the other connectors that are in the circuit. Refer to Troubleshooting, Electrical Connectors - Inspect for the proper procedure for inspecting system wiring.
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Illustration 60
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Terminal locations at the left rail connector that are for the electrical power supply (Terminal 52) Keyswitch (Termianl 69) +Battery (Terminal 70) +Battery Illustration 59
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Terminal locations at the P1 ECM connector for the electrical power supply (P1-48) (P1-52) (P1-53) (P1-55) (P1-57) (P1-61) (P1-63) (P1-65) (P1-67) (P1-69) (P1-70) +Battery +Battery +Battery +Battery +Battery Battery Battery Battery Battery Battery Keyswitch
Illustration 61
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Terminal locations at the left rail connector that are for the electrical power supply (Terminal 18) Keyswitch
94 Troubleshooting Section
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D. Check the allen head screws in each of the ECM connectors and the machine interface connector for the proper torque. Refer to Troubleshooting, Electrical Connectors - Inspect for details. E. Check the harness and the wiring for abrasion and for pinch points. Expected Result: All connectors, pins, and sockets are completely coupled and/or inserted. The harness and wiring are free of corrosion, of abrasion, and of pinch points. Results:
Terminal locations at the machine interface connector for the electrical power supply (Terminal 18) Keyswitch (Terminal 39) +Battery (Terminal 40) +Battery
Terminal locations at the connector for the fuel control valve that are for the electrical power supply (Terminal 8) Keyswitch
Repair: There is a problem with the batteries or the charging system. Refer to Systems Operation/Testing and Adjusting for information that is related to troubleshooting the charging system. STOP.
C. Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the circuit.
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95 Troubleshooting Section
B. Measure the voltage between P1-48 (unswitched +Battery) and P1-61 (Battery). C. Measure the voltage between P1-52 (unswitched +Battery) and P1-63 (Battery). D. Measure the voltage between P1-53 (unswitched +Battery) and P1-65 (Battery). E. Measure the voltage between P1-55 (unswitched +Battery) and P1-67 (Battery). F. Measure the voltage between P1-57 (unswitched +Battery) and P1-69 (Battery). G. Turn the keyswitch to the ON position. H. Measure the voltage between P1-70 (keyswitch) and P1-69 (Battery). I. Turn the keyswitch to the OFF position. Expected Result: The voltage is with 1 VDC of the voltage that was measured at the battery terminals. Results:
Test Step 4. Check the Voltage from the Keyswitch to the Main Power Relay
A. Turn the keyswitch to the OFF position. B. Remove the wire from the terminal R of the keyswitch. C. Turn the keyswitch to the ON position. D. Measure the voltage on terminal B of the keyswitch to the engine ground stud. E. Measure the voltage on terminal R of the keyswitch to the engine ground stud. F. Turn the keyswitch to the OFF position. Expected Result: Voltage is present on terminal B and terminal R at the keyswitch. Results:
voltage for the keyswitch is not within the range that is specied. Proceed to Test Step 4. voltage for the ECM is not within 1 VDC of the voltage that was measured at the battery terminals. Repair: The voltage is not correct at the ECM. There is an open circuit or excessive resistance in the wiring or connections between the batteries and the ECM. Verify that the circuit breaker for the ECM is not tripped. Verify that the battery disconnect switch is in the ON position. Verify that the connection for the engine ground is clean and tight. Repair the connectors or wiring and/or replace the connectors or wiring. STOP.
96 Troubleshooting Section
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Table 34
Test Point Terminal for wire 112-PU Wire 109-OR Wire 308-YL
Repair: Repair the wiring and/or connectors between the main power relay and terminal R on the keyswitch. STOP.
i02868020
D. Turn the keyswitch to the OFF position. Expected Result: The voltage measures 24 3 VDC between each of the test points and the engine ground stud. Results:
VDC between the terminal for wire 112-PU and the engine ground stud. Repair: If voltage is present at the other two test points, check the wire 200-BK for continuity between the engine ground stud and the main power relay. If wire 200-BK is OK, replace the main power relay. STOP.
VDC between wire 109-OR and the engine ground stud. Repair: Verify that the Alternator Breaker is not tripped. Repair the wiring and/or connectors between the main power relay and the Alternator Breaker. Repair the wiring and/or connectors between the Alternator Breaker and the battery. STOP.
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97 Troubleshooting Section
Table 35
Diagnostic Codes Table Code and Description 2417-5 Ether Injection Control Solenoid current below normal Conditions which Generate this Code The Electronic Control Module (ECM) detects low current in the circuit. The ECM can only detect this condition when the output driver is not activated. The ECM detects excessive current ow in the circuit. The ECM can only detect this condition when the output driver is activated. System Response The code is logged. Ether injection is disabled.
This starting aid output is used to connect to a relay and/or a solenoid in order to control a starting aid system. Typical starting aid systems will inject ether into the intake manifold in order to aid starting of the engine during cold weather operation. The output is automatically controlled by the ECM. The reading of the coolant temperature sensor is used to determine if conditions require the use of the starting aid. If a fault condition exists with the circuit for the coolant temperature sensor, the reading for the intake manifold air temperature sensor will be used. The starting aid output will be enabled for a maximum of 30 seconds while the engine is cranking and the temperature reading is below 0 C (32 F). The starting aid output will be disabled if the engine starts. The starting aid output will also be disabled if a condition that prevents fuel injection occurs. An override parameter on Caterpillar Electronic Technician (ET) allows the technician to activate the ether system. The test is only functional when the engine speed is zero rpm. Access the test via the Override Parameters screen on Cat ET.
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98 Troubleshooting Section
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Breathing ether vapors or repeated contact of ether with skin can cause personal injury. Personal injury may occur from failure to adhere to the following procedures. Use ether only in well ventilated areas. Do not smoke while changing ether cylinders. Use ether with care to avoid res. Do not store replacement ether cylinders in living areas or in the operators compartment. Do not store ether cylinders in direct sunlight or at temperatures above 49 C (120 F). Discard cylinders in a safe place. Do not puncture or burn cylinders. Keep ether cylinders out of the reach of unauthorized personnel. To avoid possible injury, be sure the brakes are applied and all controls are in Hold or Neutral when starting the engine.
Illustration 65
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Location of the connectors at the ECM for the 16 cylinder engines (typical left side engine view) (1) J2/P2 ECM connector (2) Left rail connectors (3) J1/P1 ECM connector
Illustration 66
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Location of the connectors at the ECM for the 20 cylinder engines (typical left side engine view) (1) J2/P2 ECM connector (2) Left rail connectors (3) J1/P1 ECM connector
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99 Troubleshooting Section
Illustration 67
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Location of the connectors for the ether injection solenoid (typical example) (4) connectors for the ether injection solenoid
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B. Thoroughly inspect connectors (1), (2), (3), and (5). Also, inspect each connector (4) for the ether solenoids. Refer to Troubleshooting, Electrical Connectors - Inspect.
Illustration 69
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Terminal locations at the P2 ECM connector for the ether starting aid (P2-92) Digital return
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Illustration 71
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Terminal locations at the left rail connector that are for the ether starting aid (Terminal 31) Digital return (Terminal 59) Ether starting aid
Illustration 70
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Terminal locations at the P1 ECM connector for the ether starting aid (P1-20) Ether starting aid
Illustration 72
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Terminal locations at the machine interface connector for the ether starting aid (Terminal 15) Digital return (Terminal 25) Ether starting aid
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D. Proceed to the Diagnostic Overrides screen on Cat ET. E. Activate the ether injection system. The system will activate for ten seconds. F. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic codes to become active. Expected Result: No diagnostic codes are active. Results:
Illustration 73 Connector for the Ether start valve (Terminal 1) Ether injection solenoid (Terminal 2) Digital return
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C. Perform a 45 N (10 lb) pull test on each of the wires that are associated with the ether injection system. D. Check the torque of the allen head screws for each of the ECM connectors. Refer to Troubleshooting, Electrical Connectors - Inspect for the correct torque values. E. Check the harness and the wiring for abrasion and for pinch points from the connectors for the ether injection solenoid to the ECM. Expected Result: All connectors, pins, and sockets are completely coupled and/or inserted, and the harness and wiring are free of corrosion, of abrasion and of pinch points. Results:
Not OK A 5 code is active at this time. Proceed Test Step 3. Create an Open Circuit at the Harness Connectors for the Ether Injection Solenoids
A. Turn the keyswitch to the OFF position. B. Disconnect the connector for the left ether injection solenoid and check for an open circuit diagnostic code: a. Disconnect the connectors for the left ether injection solenoid. b. Turn the keyswitch to the ON position. c. Proceed to the Diagnostic Overrides screen on Cat ET. d. Activate the ether injection system. The system will activate for ten seconds. e. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic codes to become active. A -5 code will be active for the ether injection solenoid.
OK The connectors and the wiring appear to be OK. Proceed to Test Step 2. not OK.
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f. Turn the keyswitch to the OFF position. Leave the connectors for the left ether injection solenoid disconnected. C. Disconnect the connector for the right ether injection solenoid and check for an open circuit diagnostic code: a. Disconnect the connectors for the right ether injection solenoid. b. Turn the keyswitch to the ON position. c. Proceed to the Diagnostic Overrides screen on Cat ET. d. Activate the ether injection system. The system will activate for ten seconds. e. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic codes to become active. A -5 code will be active for the ether injection solenoid. f. Turn the keyswitch to the OFF position. Leave the connectors for the right ether injection solenoid disconnected. Expected Result: A -5 code became active for at least one of the ether injection solenoids during the test. Results:
of the connectors was disconnected. The short is in the harness between the connector for the ether solenoid and the ECM. There may be a problem with the ECM. Leave the connectors for both solenoids disconnected. Proceed to Test Step 5.
Repair: The engine harness and the ECM are OK. The problem is in the harness between the machine interface connector and the ether injection solenoids. There may be a problem with the solenoids. Perform the following procedure:
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Check the circuit resistance of the machine harness from the machine interface connector to the ether injector solenoids. Be sure to check both legs of the circuit for continuity. If a problem with the wiring harness has been discovered, repair the harness or replace the harness. Verify that the original problem has been eliminated. If an open circuit in the harness is not discovered then there is either an intermittent electrical problem in the harness or there is a problem with both of the ether injection solenoids. Make the necessary repairs to the ether system. Verify that the original problem has been eliminated. STOP.
Note: Wait at least 30 seconds in order for the diagnostic codes to become active. A -5 code will become active for the ether injection solenoid. f. Turn the keyswitch to the OFF position. G. Check the operation of the ECM by creating a short at the ECM: a. Connect the loose end of the jumper wire to engine ground stud. b. Turn the keyswitch to the ON position. c. Proceed to the Diagnostic Overrides screen on Cat ET. d. Activate the ether injection system. The system will activate for ten seconds. e. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic codes to become active. A -6 code will become active for the ether injection solenoid with the short circuit in place. H. Turn the keyswitch to the OFF position. I. Return all wiring to the original conguration. Expected Result: A -5 code is active when the solenoid wire is an open circuit. A -6 code is active when the jumper wire is short circuited to the engine ground stud. Results:
wire was installed. The -6 code did not become active after the jumper wire was installed. The open is in the harness wiring between the connector for the ether solenoid and the ECM. There may be a problem with the ECM. Proceed to Test Step 5.
A -6 code is active when the jumper wire is shorted to engine ground. Repair: The ECM is operating properly. The problem is in the wiring between the ECM and the machine interface connector. Repair the connectors or wiring and/or replace the connectors or wiring. STOP.
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Repair: The ECM does not detect the open circuit or the short circuit at the ECM connector. There is a problem with the ECM. Perform the following procedure: 1. Temporarily connect a test ECM. Refer to Troubleshooting, ECM - Replace. 2. Recheck the circuit in order to ensure that the original problem has been resolved. If the problem is resolved with the test ECM, install the suspect ECM. If the problem returns with the suspect ECM, replace the ECM. Verify that the problem is resolved. If the problem is not resolved with the test ECM, install the original ECM. There is a problem in the wiring. STOP.
i02907031
Diagnostic Codes Table Code and Description 1627-5 Fuel Pump Relay current below normal Conditions which Generate this Code The engines Electronic Control Module (ECM) detects an open circuit at the fuel pump relay for 60 seconds. The ECM detects a short to battery voltage for the fuel pump relay for 60 seconds. The ECM can only detect this condition when the output driver is not activated. The engines ECM detects a short circuit for the fuel pump relay. The ECM can only detect this condition when the output driver is activated. System Response The code is logged.
The ECM has the ability to energize the fuel pump relay. The fuel pump relay controls battery power to the fuel priming pump. Manually Priming the Fuel System
A manual switch can be used to prime the fuel system. This is usually used after maintenance has been performed on the fuel system. This allows air to be purged from the system without opening up fuel lines.
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When the switch is activated, the ECM powers the electric fuel priming pump. The ECM will command the throttle position to 25 percent. This provides a path for the air. To use this feature, the keyswitch must be in the ON position. Also, the engine speed must be 0 rpm. The switch for the fuel priming pump is a normally open switch. Automatically Priming the Fuel System This strategy improves the capability of the fuel system at low engine speeds. The ECM will automatically turn on the fuel priming pump during starting of the engine. The ECM turns on the fuel pump when the engine speed is greater than 50 rpm. The ECM turns off the fuel pump when the engine speed is 100 rpm below the low engine idle. An override parameter on Caterpillar Electronic Technician (ET) allows the technician to activate the fuel priming pump. The test is only functional when the engine speed is zero rpm. Access the test via the Override Parameters screen on Cat ET.
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Illustration 77
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Location of the machine interface connectors (typical left rear engine view) (4) Machine interface connector
Illustration 75
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Location of the ECM connectors for the 16 cylinder engines (typical left front engine view) (1) J1/P1 ECM connector (2) Right rail connector (3) Left rail connector
Illustration 78
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Location of the connectors for the fuel priming pump (typical front right engine view)
B. Thoroughly inspect connectors (1), (2), (3), (4), and (5). Refer to Troubleshooting, Electrical Connectors - Inspect.
Illustration 76
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Location of the ECM connectors for the 20 cylinder engines (typical front side engine view) (1) J1/P1 ECM connector (2) Right rail connector (3) Left rail connector
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Illustration 80
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Terminal locations for the fuel priming pump at the left rail connectors (Terminal 17) Fuel priming pump (Terminal 43) Relay signal circuit to the pump Illustration 79
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Terminal locations for the high pressure fuel pump at the P1 ECM connectors (P1-10) Fuel priming pump
Illustration 81
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Terminal locations for the fuel priming pump at the right rail connectors (Terminal 58) Relay signal circuit to the pump (Terminal 5) Return
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Results:
F. Activate the override for the fuel pump relay. G. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic code to become active. H. Deactivate the override for the fuel pump relay. I. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes.
Terminal locations at the machine interface connector for the fuel priming pump (Terminal 17) Fuel priming pump (Terminal 5) Relay signal circuit to the pump
Illustration 83
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Terminal locations for the fuel priming pump at the right rail connectors (Terminal 1) Relay signal circuit to the pump (Terminal 2) Return
Note: Wait at least 70 seconds in order for the diagnostic codes to become active. Expected Result: No diagnostic codes are active. Results:
C. Check the torque of the allen head screws for each of the ECM connectors. Refer to Troubleshooting, Electrical Connectors - Inspect for the correct torque values. D. Check the harness and the wiring for abrasion and for pinch points from the connectors for the ether injection solenoid to the ECM. Expected Result: All connectors, pins, and sockets are completely coupled and/or inserted, and the harness and wiring are free of corrosion, of abrasion and of pinch points.
problem is suspected in the circuit for the fuel priming pump. Proceed to Test Step 6. time. Proceed to Test Step 3. time. Proceed to Test Step 4.
Not OK A -6 diagnostic code is active at this Not OK A -5 diagnostic code is active at this
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Test Step 3. Create an Open at the Connector for the Fuel Pump Relay
A. Remove power from the ECM. B. Turn the keyswitch to the OFF position. C. Disconnect the connector from the fuel pump relay. D. Restore power to the ECM. E. Turn the keyswitch to the ON position. F. Select diagnostic tests from Cat ET. G. Select the Override Parameters screen on Cat ET. H. Activate the override for the fuel pump relay. I. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic code to become active. J. Deactivate the override for the fuel pump relay. K. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 70 seconds in order for the diagnostic codes to become active. Expected Result: A -5 diagnostic code is now active for the fuel pump relay. Results:
C. Disconnect the connector for the fuel pump relay. Install a jumper wire between the terminals at the connector for the fuel pump relay. Refer to Illustration 74 for the schematic of the circuit. D. Restore power to the ECM. E. Turn the keyswitch to the ON position. F. Select diagnostic tests from Cat ET. G. Select the Override Parameters screen on Cat ET. H. Activate the override for the fuel pump relay. I. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic code to become active. J. Deactivate the override for the fuel pump relay. K. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 70 seconds in order for the diagnostic codes to become active. Expected Result: A -6 diagnostic code is active when the jumper wire is installed. Results:
disconnecting the connector for the fuel priming pump. Repair: Temporarily install a new fuel pump relay. Verify that there are no active diagnostic codes for the fuel pump relay. Clear any logged diagnostic codes. STOP.
Not OK A -6 diagnostic code remains active. Test Step 4. Create a Short at the Connector for the Fuel Pump Relay
A. Remove power from the ECM. B. Turn the keyswitch to the OFF position.
with the jumper in place. Verify that wire at terminal 2 of the connector for the fuel pump relay has continuity to engine ground. If the ground circuit is OK, the open circuit is between the ECM and the connector for the fuel pump relay. Proceed to Test Step 5.
There is a short between the connector for the fuel pump relay and the ECM. Proceed to Test Step 5.
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a. Disconnect the J1/P1 ECM connector. b. Remove the wire for the fuel pump relay from P1-10. c. Install a wire jumper into the socket for P1-10. Ensure that the wire jumper is not in contact with any other wire in the harness or in contact with engine ground. d. Reconnect the ECM connector. e. Restore power to the ECM. f. Turn the keyswitch to the ON position. g. Select diagnostic tests from Cat ET. h. Select the Override Parameters screen on Cat ET. i. Activate the override for the fuel pump relay. j. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic code to become active. k. Deactivate the override for the fuel pump relay. l. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 70 seconds in order for the diagnostic codes to become active. D. Check the operation of the ECM by creating a short circuit at the ECM connector: a. Turn the keyswitch to the OFF position. b. Install a wire jumper between the wire jumper in P1-10 and engine ground. c. Restore power to the ECM. d. Turn the keyswitch to the ON position. e. Select diagnostic tests from Cat ET. f. Select the Override Parameters screen on Cat ET. g. Activate the override for the fuel pump relay. h. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes.
Note: Wait at least 30 seconds in order for the diagnostic code to become active. i. Deactivate the override for the fuel pump relay. j. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 70 seconds in order for the diagnostic codes to become active. E. Remove power from the ECM. Reconnect all wires to the original conguration. Expected Result: A -5 diagnostic code is active when the wire for the fuel pump relay is open. A -6 diagnostic code is active when the wire jumper in P1-19 is connected to engine ground. Results:
is in the wiring between the ECM and the connector for the fuel pump relay. Repair: Repair the connectors or wiring and/or replace the connectors or wiring. STOP.
The -5 diagnostic code is not active when the wire jumper is open. The -6 diagnostic code is not active when the wire jumper is grounded. Repair: There is a problem with the ECM. Perform the following procedure: 1. Temporarily connect a test ECM. Refer to Troubleshooting, ECM - Replace. 2. Recheck the circuit in order to ensure that the original problem has been resolved. If the problem is resolved with the test ECM, install the suspect ECM. If the problem returns with the suspect ECM, replace the ECM. Verify that the problem is resolved. If the problem is not resolved with the test ECM, install the original ECM. There is a problem in the wiring. STOP.
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Test Step 6. Check the Voltage at the Connector for the Fuel Priming Pump
A. Turn the keyswitch to the ON position. B. Select diagnostic tests from Cat ET. C. Select the Override Parameters screen on Cat ET. D. Activate the override for the fuel pump relay. E. Measure the voltage between terminal 1 and terminal 2 at the connector for the fuel priming pump. Refer to Illustration 74 for the schematic of the circuit. F. Deactivate the override for the fuel pump relay. Expected Result: The voltage is 24 3 VDC. Results:
J. Activate the override for the fuel pump relay. K. Measure the voltage between terminal 85 on the connector for the fuel pump relay and engine ground. L. Deactivate the override for the fuel pump relay. Expected Result: The voltage is 24 3 VDC. Results:
that the ground circuit at terminal 2 has continuity to engine ground. If the ground circuit is OK, proceed to Test Step 7.
Test Step 7. Check the Normally Open Contacts at the Fuel Pump Relay
A. Remove power from the ECM. B. Turn the keyswitch to the OFF position. C. Disconnect the connector for the fuel pump relay. D. Remove the wire from terminal 85 of the connector at the relay. E. Reconnect the connector for the fuel pump relay. F. Restore power to the ECM. G. Turn the keyswitch to the ON position. H. Select diagnostic tests from Cat ET. I. Select the Override Parameters screen on Cat ET.
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Table 37
Diagnostic Codes Table Description 18-8 Fuel Control Valve abnormal frequency, pulse width, or period Conditions which Generate this Code The controller for the fuel control valve has detected an error at the input for the Pulse Width Modulated signal (PWM). The problem is communicated to the ECM via the CAN data link. The engines Electronic Control Module (ECM) did not receive the expected data link information from the controller for the fuel control valve. System Response Control for the fuel control valve reverts to the CAN data link.
Control for the fuel control valve reverts to the PWM signal.
This engine is equipped with a high pressure common rail fuel system. The fuel pressure for the high pressure common rail fuel system is generated by the high pressure fuel pump. Pressure regulation for the high pressure fuel pump is provided by the fuel control valve. The fuel control valve is a mechanical valve that is part of the high pressure fuel pump. The valve regulates the fuel pressure that is produced by the pump by controlling the volume of fuel that enters the pump. The valve is controlled by an electrical actuator. Control for the actuator is provided by an electronic controller that is an integral part of the actuator. The engine ECM communicates a desired throttle position to the fuel control valves controller in the form of a PWM signal. The PWM signal is generated from +5 VDC that is produced by the controller and applied to the signal line. The ECM converts the DC voltage to a PWM signal with a low side ECM driver. Note: The desired throttle position is also communicated via the CAN data link as a throttle backup control. The PWM signal that is used for the desired throttle position has a constant frequency of 500 hertz. At low engine idle, the signal will have a duty cycle of approximately 10 percent. At high engine idle with no load on the engine, the signal will have a duty cycle of approximately 20 to 25 percent. At high engine idle with a full load on the engine, the signal will have a duty cycle of approximately 50 to 60 percent. The desired throttle position can be viewed on Caterpillar Electronic Technician (ET). View the status of the Fuel Actuator Position Command parameter in order to determine the desired throttle position of the engine. At low engine idle, the Fuel Actuator Position Command will be approximately 10 to 15 percent. At high engine idle with no load on the engine, the Fuel Actuator Position Command will be approximately 20 to 25 percent. At high engine idle with a full load on the engine, the Fuel Actuator Position Command will be approximately 40 to 50 percent.
A power module is used to supply electrical power to the controller for the fuel control valve. The power module is used to convert battery voltage (24 VDC) to 14.0 1.5 VDC that is used by the controller.
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Illustration 84 Schematic of the PWM signal for the high pressure fuel pump
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Note: For a schematic and troubleshooting information that is related to the throttle backup control and the CAN data link, refer to Troubleshooting, Data Link - Test.
Illustration 86
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Location of the ECM connectors for the 20 cylinder engines (typical front side engine view) Illustration 85
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Location of the ECM connectors for the 16 cylinder engines (typical left front engine view) (1) J1/P1 ECM connector (2) Right rail connector (3) Left rail connector
(1) J1/P1 ECM connector (2) Right rail connector (3) Left rail connector
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Illustration 87
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Location of the machine interface connectors (typical left rear engine view) (4) Machine interface connector
Illustration 89
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Terminal locations for the high pressure fuel pump at the P1 ECM connectors (P1-38) PWM signal (P1-70) Keyswitch Illustration 88
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Location of the connectors at the high pressure fuel pump (5) Connector for the fuel control valves electronic controller (6) Connectors at the power module
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Terminal locations at the connector for the power module 1) Battery 5) Supply voltage (output) 8) Return (output) 12) +Battery
Terminal locations for the high pressure fuel pump at the right rail connectors (Terminal (Terminal (Terminal (Terminal 18) 31) 51) 54) Keyswitch Battery PWM signal +Battery
Illustration 93
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Terminal locations for the fuel system components at the harness connector (Terminal (Terminal (Terminal (Terminal Illustration 91
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3) 5) 6) 7)
Terminal locations at the connector for the fuel control valves controller (Terminal (Terminal (Terminal (Terminal 1) Supply 5) Return 8) Keyswitch 11) PWM signal
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Terminal locations at the machine interface connector for the high pressure fuel pump (Terminal 4) +Battery (Terminal 18) Keyswitch
Repair: The actual position and the desired position of the fuel actuator is not within specications. Replace the high pressure fuel pump. STOP.
Repair: During a self test, the controller for the fuel control valve has detected an internal fault. Replace the high pressure fuel pump. STOP.
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Test Step 2. Check for +5 Volts at the Connector for the Fuel Control Valves Controller
J. Remove the electrical power from the ECM. Restore the wiring to the original conguration. Expected Result: The measurement indicates that there is +5 volts available at the controller. Results:
Terminal locations at the connector for the fuel control valves controller (Terminal (Terminal (Terminal (Terminal 1) Supply 5) Return 8) Keyswitch 11) PWM signal
is not +5 volts available at the controller. Ensure that the wiring has been restored to the original conguration at the controller. Proceed to Test Step 3.
Test Step 3. Check the Supply Voltage at the Fuel Control Valves Controller
A. Disconnect the connector at the fuel control valves controller. B. Restore the electrical power to the ECM. Ensure that the keyswitch is in the ON position. C. Use a multimeter to measure the supply voltage between terminal 1 (supply) and terminal 5 (return) on the harness side of the connector. D. Remove the electrical power from the ECM. Expected Result: The supply voltage measures 14.0 1.5 VDC. Results:
A. Remove the electrical power from the ECM. B. Fabricate a jumper wire that is long enough to create a test circuit at the connector for the fuel control valves controller. Crimp a connector socket to one end of the jumper wire. C. Disconnect the connector at the fuel control valves controller. D. Use a wire removal tool to remove the wire from terminal location 11 (PWM signal) at the connector for the fuel control valves controller. Install the jumper wire into this terminal location. Note: Ensure that the loose end of the jumper wire does not come into contact with any ground source. E. Connect the connector at the controller. F. Install a 7X-1709 Multimeter Probe (BLACK) onto a multimeter negative lead (black). Note: Ensure that the multimeter probe is in good repair. A bent probe may contact other terminals inside the connector. G. Carefully insert the spoon into terminal 5 (return) of the connector for the controller. H. Restore the electrical power to the ECM. Ensure that the keyswitch is in the ON position. I. Measure the voltage between the loose end of the jumper wire and the test lead for the spoon. Note: Use the DC Voltage setting on the multimeter to check the voltage.
supply voltage is reaching the fuel control valves controller. Proceed to Test Step 4. VDC. The supply voltage is not reaching the fuel control valves controller. Proceed to Test Step 5.
Test Step 4. Check for Keyswitch Power at the Fuel Control Valves Controller
A. Ensure that the connector for the fuel control valves controller has been disconnected. B. Restore the electrical power to the ECM. Ensure that the keyswitch is in the ON position. C. Use a multimeter to measure the keyswitch power between terminal 8 (keyswitch) on the harness side of the connector and the chassis ground.
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D. Remove the electrical power from the ECM. Restore the wiring to the original conguration. Expected Result: The voltage at the keyswitch input is 24.0 1.5 VDC. Results:
G. Remove the electrical power from the ECM. Restore the wiring to the original conguration. Expected Result: The supply voltage (output) is 14.0 1.5 VDC. Results:
1.5 VDC. The power module is not generating the correct voltage. There may be a problem with the battery circuit for the power module. Proceed to Test Step 6.
Test Step 5. Check the Supply Voltage (Output) at the Power Module
A. Disconnect the connectors for the power module. B. Fabricate two jumper wires that are long enough to create a test circuit at the connector for the power module. Crimp connector sockets to one end of each of the jumper wires. C. Remove the wires from terminal location 5 (supply voltage (output)) and terminal location 8 (return (output)) at the connector for the power module. Install a jumper wire into each of these terminal locations. D. Connect the connectors for the power module. Note: Ensure that the loose ends of the jumper wires are not in contact with any ground source. E. Restore the electrical power to the ECM. F. Measure the supply voltage between the loose ends of the jumper wires at the power module.
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Test Step 7. Check for +5 Volts on the PWM Signal Line at the ECM
A. Disconnect the P1 ECM connector. B. Use a wire removal tool to remove the wire from terminal location P1-38 (PWM signal) at the ECM connector. Note: Ensure that the loose end of the wire does not come into contact with any ground source. C. Connect the P1 ECM connector. D. Install a 7X-1709 Multimeter Probe (BLACK) onto a multimeter negative lead (black). Note: Ensure that the multimeter probes are in good repair. A bent probe may contact other terminals inside the connector. E. Carefully insert the black spoon into terminal P1-18 (digital return) at the ECM. F. Restore the electrical power to the ECM. Ensure that the keyswitch is in the ON position. G. Measure the voltage between the loose end of the signal line and the test lead for the spoon. Note: Use the DC Voltage setting on the multimeter to check the voltage. H. Remove the electrical power from the ECM. Restore the wiring to the original conguration. Expected Result: The measurement indicates that there is +5 volts available on the signal line at the ECM. Results:
Repair: The signal voltage is available at the controller, but the signal voltage is not reaching the ECM. There is a problem in the harness and/or in a connector that is between the fuel control valves controller and the ECM. Repair the harness and/or the connector or replace the harness. Refer to Troubleshooting, Electrical Connectors - Inspect for details. STOP.
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The correct value is approximately 90 percent duty cycle with the Fuel Actuator Position Command set to a value of 100 percent. The correct frequency of the signal is 500 Hz. J. Remove electrical power from the ECM. Expected Result: The duty cycle and the frequency of the PWM signal is consistent with the values that are given above. Results:
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Table 38
Diagnostic Codes Table Description 1-2 Cylinder #1 Injector erratic, intermittent, or incorrect 2-2 Cylinder #2 Injector erratic, intermittent, or incorrect 3-2 Cylinder #3 Injector erratic, intermittent, or incorrect 4-2 Cylinder #4 Injector erratic, intermittent, or incorrect 5-2 Cylinder #5 Injector erratic, intermittent, or incorrect 6-2 Cylinder #6 Injector erratic, intermittent, or incorrect 7-2 Cylinder #7 Injector erratic, intermittent, or incorrect 8-2 Cylinder #8 Injector erratic, intermittent, or incorrect 9-2 Cylinder #9 Injector erratic, intermittent, or incorrect 10-2 Cylinder #10 Injector erratic, intermittent, or incorrect 11-2 Cylinder #11 Injector erratic, intermittent, or incorrect 12-2 Cylinder #12 Injector erratic, intermittent, or incorrect 13-2 Cylinder #13 Injector erratic, intermittent, or incorrect 14-2 Cylinder #14 Injector erratic, intermittent, or incorrect 15-2 Cylinder #15 Injector erratic, intermittent, or incorrect 16-2 Cylinder #16 Injector erratic, intermittent, or incorrect 2493-2 Cylinder #17 Injector erratic, intermittent, or incorrect 2494-2 Cylinder #18 Injector erratic, intermittent, or incorrect 2495-2 Cylinder #19 Injector erratic, intermittent, or incorrect 2496-2 Cylinder #20 Injector erratic, intermittent, or incorrect
(continued)
System Response
The ECM receives a signal from the injector solenoid that is invalid or the ECM receives a signal from the injector solenoid that cannot be accurately interpreted.
The code is logged. The ECM continues to energize the injector solenoid.
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Diagnostic Codes Table Description 1-5 Cylinder #1 Injector current below normal 2-5 Cylinder #2 Injector current below normal 3-5 Cylinder #3 Injector current below normal 4-5 Cylinder #4 Injector current below normal 5-5 Cylinder #5 Injector current below normal 6-5 Cylinder #6 Injector current below normal 7-5 Cylinder #7 Injector current below normal 8-5 Cylinder #8 Injector current below normal 9-5 Cylinder #9 Injector current below normal 10-5 Cylinder #10 Injector current below normal 11-5 Cylinder #11 Injector current below normal 12-5 Cylinder #12 Injector current below normal 13-5 Cylinder #13 Injector current below normal 14-5 Cylinder #14 Injector current below normal 15-5 Cylinder #15 Injector current below normal 16-5 Cylinder #16 Injector current below normal 2493-5 Cylinder #17 Injector current below normal 2494-5 Cylinder #18 Injector current below normal 2495-5 Cylinder #19 Injector current below normal 2496-5 Cylinder #20 Injector current below normal
(continued)
System Response
The ECM detects a low current in the circuit for the injector solenoid.
The code is logged. The ECM continues the attempt to energize the solenoid circuit until the circuit is repaired.
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Diagnostic Codes Table Description 1-6 Cylinder #1 Injector current above normal 2-6 Cylinder #2 Injector current above normal 3-6 Cylinder #3 Injector current above normal 4-6 Cylinder #4 Injector current above normal 5-6 Cylinder #5 Injector current above normal 6-6 Cylinder #6 Injector current above normal 7-6 Cylinder #7 Injector current above normal 8-6 Cylinder #8 Injector current above normal 9-6 Cylinder #9 Injector current above normal 10-6 Cylinder #10 Injector current above normal 11-6 Cylinder #11 Injector current above normal 12-6 Cylinder #12 Injector current above normal 13-6 Cylinder #13 Injector current above normal 14-6 Cylinder #14 Injector current above normal 15-6 Cylinder #15 Injector current above normal 16-6 Cylinder #16 Injector current above normal 2493-6 Cylinder #17 Injector current above normal 2494-6 Cylinder #18 Injector current above normal 2495-6 Cylinder #19 Injector current above normal 2496-6 Cylinder #20 Injector current above normal
(continued)
System Response
The ECM detects a high current in the circuit for the injector solenoid.
The code is logged. The ECM disables this solenoid circuit. The ECM will periodically attempt to energize the solenoid circuit until the circuit is repaired.
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Diagnostic Codes Table Description 1-7 Cylinder #1 Injector not responding properly 2-7 Cylinder #2 Injector not responding properly 3-7 Cylinder #3 Injector not responding properly 4-7 Cylinder #4 Injector not responding properly 5-7 Cylinder #5 Injector not responding properly 6-7 Cylinder #6 Injector not responding properly 7-7 Cylinder #7 Injector not responding properly 8-7 Cylinder #8 Injector not responding properly 9-7 Cylinder #9 Injector not responding properly 10-7 Cylinder #10 Injector not responding properly 11-7 Cylinder #11 Injector not responding properly 12-7 Cylinder #12 Injector not responding properly 13-7 Cylinder #13 Injector not responding properly 14-7 Cylinder #14 Injector not responding properly 15-7 Cylinder #15 Injector not responding properly 16-7 Cylinder #16 Injector not responding properly 2493-7 Cylinder #17 Injector not responding properly 2494-7 Cylinder #18 Injector not responding properly 2495-7 Cylinder #19 Injector not responding properly 2496-7 Cylinder #20 Injector not responding properly The engines Electronic Control Module (ECM) has determined that the mechanical wear for the injector is out of specications. The code is logged. The ECM continues to energize the injector solenoid. Conditions which Generate this Code System Response
Background Information
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Perform this procedure during operating conditions that are identical to the operating conditions that exist when the problem occurs. Typically, problems with the injector solenoid occur when the engine is warmed up and/or when the engine is under vibration (heavy loads). Be aware that the wiring and/or the connectors may have problems that only occur during vibration. These engines have fuel injectors that are electronically controlled. A solenoid is used to actuate the injector. The solenoid is mounted on top of the fuel injector body. The ECM sends a 105 volt pulse to the injector solenoid. The pulse is sent at the proper time and for the correct duration for any given engine load and speed. Trim Files When an injector is replaced, program the new injector code into the ECM. Refer to Troubleshooting, Injector Trim File - Install for information that is related to trim les. If the ECM is replaced, all of the injector codes must be programmed into the new ECM. Refer to Troubleshooting, ECM - Congure for information that is related to the conguration of a new ECM. Diagnostic Tests that are Available on Caterpillar Electronic Technician (ET) Cat ET includes the following tests that will aid in troubleshooting injector solenoids: Injector Solenoid Test This test identies an open circuit or a short circuit in the circuits for the injector solenoids. The test is performed while the engine is not running. The Injector Solenoid Test briey activates each solenoid. A good solenoid will create an audible click when the solenoid is activated. Cat ET indicates the status of the solenoid as OK, Open, or Short. Fuel System Verication Test This test evaluates the health of each injector. The test determines if an injector needs to be replaced. When the test is performed, Cat ET indicates the status of each injector as Success or Failed. Perform this test immediately after an injector has been replaced. Also, perform this test if a -2 code or -7 code is active. Note: The Fuel System Verication Test test must be performed when the engine is running and the coolant temperature is above 65 C (149 F). Refer to Illustration 96 for a schematic of the 16 cylinder engines and refer to Illustration 97 for a schematic of the 20 cylinder engines. Note: Two injector solenoids may share a common supply wire. For this reason, an open circuit or a short circuit in a supply wire could cause diagnostic codes for two cylinders.
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Illustration 96
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Illustration 97
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Illustration 100
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Location of the fuel injector connector at the cylinder head (typical example) (4) Fuel injector connector at the cylinder head
Illustration 98
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Location of the connectors at the ECM for the 16 cylinder engines (typical left front engine view) (1) J2/P2 ECM connector (2) Right rail connector (3) Left rail connector
Illustration 99
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Location of the connectors at the ECM for the 20 cylinder engines (typical front side engine view) (1) J2/P2 ECM connector (2) Right rail connector (3) Left rail connector
Illustration 101
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Terminal locations at the P2 ECM connector (16 cylinder engines) (P2-18) Injector 11 return (P2-22) Injector 7 return (P2-31) Injector 9 return (P2-50) Injector 5 return (P2-61) Injector 14, 16 supply (P2-67) Injector 9 ,11 supply (P2-68) Injector 5, 7 supply (P2-75) Injector 10 return (P2-77) Injector 2, 4 supply (P2-87) Injector 12 return (P2-88) Injector 6 return (P2-98) Injector 8 return (P2-101) Injector 14 return (P2-103) Injector 16 return (P2-104) Injector 1, 3 supply (P2-106) Injector 13 return (P2-108) Injector 15 return (P2-109) Injector 6, 8 supply (P2-111) Injector 2 return (P2-113) Injector 4 return (P2-115) Injector 13, 15 supply (P2-116) Injector 1 return (P2-118) Injector 3 return (P2-120) Injector 10, 12 supply
Terminal locations at the P2 ECM connector (20 cylinder engines) (P2-18) Injector 17 return (P2-22) Injector 13 return (P2-31) Injector 15 return (P2-42) Injector 19 return (P2-50) Injector 11 return (P2-53) Injector 10 supply (P2-58) Injector 19 supply (P2-61) Injector 6, 8 supply (P2-67) Injector 15, 17 supply (P2-68) Injector 11, 13 supply (P2-75) Injector 16 return (P2-77) Injector 2, 4 supply (P2-86) Injector 20 return (P2-87) Injector 18 return (P2-88) Injector 12 return (P2-98) Injector 14 return (P2-99) Injector 9 supply (P2-100) Injector 10 return (P2-101) Injector 6 return (P2-103) Injector 8 return (P2-104) Injector 1, 3 supply (P2-105) Injector 9 return (P2-106) Injector 5 return (P2-108) Injector 7 return (P2-109) Injector 12, 14 supply (P2-110) Injector 20 supply (P2-111) Injector 2 return (P2-113) Injector 4 return (P2-115) Injector 5, 7 supply (P2-116) Injector 1 return (P2-118) Injector 3 return (P2-120) Injector 16, 18 supply
Illustration 102
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Illustration 103
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Illustration 104
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Terminal locations at the left side rail connector (16 cylinder engines) (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal 1) Injector 2, 4 supply 2) Injector 2 return 3) Injector 4 return 4) Injector 14, 16 supply 5) Injector 14 return 6) Injector 16 return 9) Injector 6, 8 supply 10) Injector 6 return 11) Injector 8 return 12) Injector 10, 12 supply 13) Injector 10 return 14) Injector 12 return
Terminal locations at the right side rail connector (16 cylinder engines) (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal 32) 33) 34) 35) 36) 37) 40) 41) 42) 43) 44) 45) Injector Injector Injector Injector Injector Injector Injector Injector Injector Injector Injector Injector 1, 3 supply 1 return 3 return 13, 15 supply 13 return 15 return 5, 7 supply 5 return 7 return 9, 11 supply 9 return 11 return
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Illustration 105
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Terminal locations at the left side rail connector (20 cylinder engines) (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal 1) Injector 2, 4 supply 2) Injector 2 return 3) Injector 4 return 4) Injector 6, 8 supply 5) Injector 6 return 6) Injector 8 return 7) Injector 10 supply 8) Injector 10 return 9) Injector 12, 14 supply 10) Injector 12 return 11) Injector 14 return 12) Injector 16, 18 supply 13) Injector 16 return 14) Injector 18 return 15) Injector 20 supply 16) Injector 20 return
Illustration 106
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Terminal locations at the right side rail connector (20 cylinder engines) (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal 32) 33) 34) 35) 36) 37) 38) 39) 40) 41) 42) 43) 44) 45) 46) 47) Injector Injector Injector Injector Injector Injector Injector Injector Injector Injector Injector Injector Injector Injector Injector Injector 1, 3 supply 1 return 3 return 5, 7supply 5 return 7 return 9 supply 9 return 11, 13 supply 11 return 13 return 15, 17 supply 15 return 17 return 19 supply 19 return
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NOTICE Ensure that all adjustments and repairs that are carried out to the fuel system are performed by authorised personnel that have the correct training. Before begining ANY work on the fuel system, refer to Operation and Maintenance Manual, General Hazard Information and High Pressure Fuel Lines for safety information. Refer to Systems Operation, Cleanliness of Fuel System Components for detailed information on the standards of cleanliness that must be observed during ALL work on the fuel system. A. Establish communication between Cat ET and the engine ECM. Cat ET must be congured for Dual Data Link Communications in order to perform this procedure. Refer to Troubleshooting, Electronic Service Tools, if necessary. B. Determine the diagnostic code that relates to an injector. Expected Result: A -2 code or a -7 code is present. Electrical Shock Hazard. The unit injector system uses 90 - 120 volts. The ECM sends this signal to the unit injectors. Do not come in contact with the unit injector harness connector while the engine is operating. Failure to follow this instruction could resulting in personal injury or death. Results:
Illustration 108 Terminal locations at the injector connector (1) Supply (2) Return
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Contact with high pressure fuel may cause uid penetration and burn hazards. High pressure fuel spray may cause a re hazard. Failure to follow these inspection, maintenance and service instructions may cause personal injury or death.
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b. Flash program the trim le for the new injector into the ECM. Refer to Troubleshooting, Injector Trim File - Install, if necessary. c. Perform the Fuel System Verication Test again. This will clear the active diagnostic code for the new injector. Verify that the original condition has been resolved. STOP.
C. Refer to the appropriate schematic diagram. Identify the wires at each connector that relate to the cylinder that has the code. Perform the following procedure for the wires at each connector: a. Inspect the seal around each wire. Verify that the seal is sealing correctly. b. Pull on each wire in order to verify that the wire and the terminal are correctly installed. Expected Result: The external engine harness is OK. A code does not become active. Results:
-5 or -6 Diagnostic Code Proceed to Test Step 2. Test Step 2. Determine if the Diagnostic Code is Active or Logged
A. Start the engine. Allow the engine to warm up to normal operating temperature 77 C (171 F). B. Determine if the -5 or -6 code is active or logged. Expected Result: The code is logged. Results:
the number of the cylinder that has the logged diagnostic code. Stop the engine. Proceed to Test Step 4. harness has been identied.
Logged code There is a logged diagnostic code. Do not turn off the engine. Proceed to Test Step 3. Do not turn off the engine. Proceed to Test Step 5.
Active code There is an active diagnostic code. Test Step 3. Check the External Engine Harness
Test Step 4. Check the Harness Under the Valve Cover for a Problem
A. Remove the valve cover of the affected cylinder. B. Carefully perform a visual inspection of the wiring harness under the valve cover. Look for the following problems:
A. Inspect the injector wiring harness between the ECM and the valve cover for the affected injector. Look for these problems:
Improper routing of the wire harness Missing clamps or other hardware Loose connectors or damaged connectors Damage that is caused by excessive heat Damage that is caused by chang
B. Slowly wiggle the wiring harness and the connectors between the P2 connector and the valve cover. Pay particular attention to the wiring near each connector. Look for activation of the diagnostic code as you wiggle the wiring. Continue with this procedure if the code does not become active. If the code becomes active, note the location of the problem. Proceed to the appropriate result for this Test Step.
Improper routing of the wire harness Missing clamps or other hardware Loose connectors or damaged connectors Damage that is caused by excessive heat Damage that is caused by chang
C. Inspect the connectors on the harness under the valve cover. Perform the following procedure on each wire that relates to the cylinder that has the code: a. Inspect the seal around each wire. Verify that the seal is sealing correctly. b. Pull on each wire in order to verify that the wire and the terminal are correctly installed.
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c. Disconnect the harness connector from the suspect injector. Carefully inspect each terminal for debris, for moisture, and for corrosion. Verify that the seals and wedges are properly installed. d. Connect the harness connector to the injector. Verify that both clips work correctly. Expected Result: The wiring harness under the valve cover is OK. Results:
B. Refer to the appropriate schematic diagram. Identify the wires at each connector that relate to the cylinder that has the code. Perform the following procedure for the wires at each connector: a. Inspect the seal around each wire. Verify that the seal is sealing correctly. b. Pull on each wire in order to verify that the wire and the terminal are correctly installed. Expected Result: The code becomes inactive when the wiring is moved. Results:
active. Note the cylinder that has the active -5 code. Stop the engine. Proceed to Test Step 6. active. Note the cylinder that has the active -6 code. Stop the engine. Proceed to Test Step 8.
Test Step 6. Check the External Engine Harness for an Open Circuit
Electrical shock hazard. The electronic unit injector system uses 90-120 volts. A. Turn the keyswitch to the OFF position. A strong electrical shock hazard is present if the keyswitch is not turned off. B. Disconnect the harness connectors for the affected cylinder at the cylinder head. C. Fabricate a jumper wire that is long enough to create a test circuit across the harness connector at the cylinder head. Crimp connector pins to each end of the jumper wire. D. Connect the jumper wire between terminal locations 1 (supply) and 2 (return). This will effectively create a short circuit for the cylinder.
Improper routing of the wire harness Missing clamps or other hardware Loose connectors or damaged connectors Damage that is caused by excessive heat Damage that is caused by chang
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E. Turn the keyswitch to the ON position. F. Perform the Injector Solenoid Test at least two times. Expected Result: Cat ET displays Short for the cylinder with the jumper wire. Results:
D. Inspect the connectors on the harness under the valve cover. Perform the following procedure on each wire that relates to the cylinder that has the code: a. Inspect the seal around each wire. Verify that the seal is sealing correctly. b. Pull on each wire in order to verify that the wire and the terminal are correctly installed. c. Disconnect the harness connector from the suspect injector. Carefully inspect each terminal for debris, for moisture, and for corrosion. Verify that the seals and wedges are properly installed. E. Connect a jumper wire across the terminals in the harness connector for the cylinder that has the code. This will effectively replace the injector solenoid with a short circuit. F. Turn the keyswitch to the ON position. G. Perform the Injector Solenoid Test at least two times. Expected Result: Cat ET displays Short for the cylinder with the jumper wire. Results:
with the jumper wire. The harness between the ECM connector and the harness connector at the cylinder head is OK. Remove the jumper wire. Connect the harness connectors. Proceed to Test Step 7. with the jumper wire. The ECM did not detect the jumper wire. There is an open circuit in the wiring harness between the J2 ECM connector and the harness connector at the cylinder head.
Repair: Repair the problem with the harness. Replace parts, if necessary. Start the engine. Verify that the problem is resolved. STOP.
Test Step 7. Check the Injector Harness under the Valve Cover for an Open Circuit
with the jumper wire. There is a problem with the injector harness under the valve cover. There may be a problem with a connector. Repair: Repair the wiring and/or the connector, when possible. Replace parts, if necessary. Verify that the problem is resolved. STOP.
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Test Step 8. Check the External Engine Harness for a Short Circuit
C. Disconnect the harness connector for each injector solenoid that indicates a Short on Cat ET. Ensure that each disconnected connector does not touch other components and create a short circuit. D. Turn the keyswitch to the ON position. E. Perform the Injector Solenoid Test at least two times. Expected Result: All of the injector solenoids that were disconnected indicate Open on Cat ET. Results:
Electrical shock hazard. The electronic unit injector system uses 90-120 volts. A. Turn the keyswitch to the OFF position. A strong electrical shock hazard is present if the keyswitch is not turned off. B. Disconnect the harness connectors for the injector solenoid at the cylinder head. This will effectively create an open circuit at the harness connector. C. Turn the keyswitch to the ON position. D. Perform the Injector Solenoid Test at least two times. Expected Result: The suspect cylinder indicates Open on Cat ET. Results:
Cat ET. The engine harness is OK. Connect the harness connectors. Proceed to Test Step 9. ET. There is a problem with the engine harness between the J2 connector and the valve cover harness. Repair: Repair the problem with the harness. Replace parts, if necessary. Start the engine. Verify that the problem is resolved. STOP.
Test Step 9. Check the Harness under the Valve Cover for a Short Circuit
Repair: Inspect the connectors for moisture and for corrosion. Repair the wiring and/or the connector, when possible. Replace parts, if necessary. Verify that the problem is resolved. STOP.
Electrical shock hazard. The electronic unit injector system uses 90-120 volts. A. Turn the keyswitch to the OFF position. A strong electrical shock hazard is present if the keyswitch is not turned off. B. Remove the valve cover.
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Diagnostic Codes Table Code and Description 569-5 Oil Injection Solenoid current below normal Conditions which Generate this Code The Electronic Control Module (ECM) detects an open circuit and/or a short to the +Battery in the circuit for the oil renewal solenoid. The ECM detects a short circuit to ground in the circuit for the oil renewal solenoid. A 569-5 Oil Injection Solenoid current below normal is active. or A 569-6 Oil Renewal Solenoid short to ground is active. or The ECM detects a fault in the circuit for the coolant temperature sensor. or The ECM detects a fault in the circuit for the fuel level sensor. or The ECM detects a fault in the circuit for the oil pressure sensor. System Response The code is logged. The oil renewal system is disabled.
569-6 Oil Renewal Solenoid short to ground E2089(1) Oil Renewal System Cannot Operate
The ECM adds a controlled amount of engine oil to the fuel by energizing the oil renewal solenoid. The engine oil is added to the fuel and burned during combustion. The typical oil change interval may be extended. For further information, refer to Service Manual, RENR2223, Oil Renewal System.
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Illustration 110
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Illustration 112
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Location of the oil renewal solenoid (typical right side engine view)
Location of the connectors that are for the sensor signal circuit for the 20 cylinder engines (left side engine view) (1) J2/P2 ECM connector (2) Right rail connector (3) J1/P1 ECM connector
B. Thoroughly inspect the J1/P1 and J2/P2 ECM connectors. Inspect all of the other connectors that are in the circuit for the oil renewal solenoid. Refer to Troubleshooting, Electrical Connectors - Inspect.
Illustration 111
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Location of the connectors that are for the sensor signal circuit for the 16 cylinder engines (left side engine view) (1) J2/P2 ECM connector (2) Right rail connector (3) J1/P1 ECM connector
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Illustration 113
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Terminal locations at the P1 ECM connector for the oil renewal solenoid (P1-11) Oil renewal solenoid
Illustration 114
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Terminal locations at the P2 ECM connector for the oil renewal solenoid (P2-14) Digital return
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Expected Result: All connectors, pins, and sockets are completely coupled and/or inserted. The harness and wiring are free of corrosion, of abrasion, and of pinch points. Results:
Illustration 115
A. Connect Caterpillar Electronic Technician (ET) to the service tool connector. B. Restore the electrical power to the engine ECM. C. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic codes to become active. D. Select diagnostic tests from Cat ET. E. Select the Override Parameters screen on Cat ET. F. Activate the override for the oil renewal solenoid. G. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic code to become active. H. Disable the override for the oil renewal solenoid. I. Remove the electrical power from the engine ECM. J. Determine if the problem is related to an open circuit diagnostic code -5 or a short circuit diagnostic code -6.
Terminal locations at the right rail connector for the oil renewal solenoid (Terminal 3) Return (Terminal 69) Oil renewal solenoid
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C. Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the circuit. D. Check the allen head screw on each of the ECM connectors for the proper torque. Refer to Troubleshooting, Electrical Connectors - Inspect for the correct torque values. E. Check the harness and the wiring for abrasion and for pinch points.
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Results:
Repair: Temporarily connect a new oil renewal solenoid to the harness, but do not install the newsolenoid. Verify that there are no active diagnostic codes for the oil renewal solenoid. If there are no active diagnostic codes for the solenoid, permanently install the new solenoid. Clear any logged diagnostic codes. STOP.
Not OK An open circuit diagnostic code -5 is Test Step 3. Disconnect the Connector for the Oil Renewal Solenoid in order to Create an Open Circuit
A. Disconnect the connector for the oil renewal solenoid. B. Restore the electrical power to the engine ECM. C. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic codes to become active. D. Select diagnostic tests from Cat ET. E. Select the Override Parameters screen on Cat ET. F. Activate the override for the oil renewal solenoid. G. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic code to become active. H. Disable the override for the oil renewal solenoid. Expected Result: An open circuit diagnostic code -5 is now active for the oil renewal solenoid.
Test Step 4. Create a Short at the Connector for the Oil Renewal Solenoid
A. Remove the electrical power from the engine ECM. B. Fabricate a jumper wire that is long enough to create a short between the terminals of the connector for the oil renewal solenoid. Crimp connector pins to each end of the jumper wire. C. Install the jumper wire between terminal 1 (oil renewal solenoid) and terminal 2 (return) on the harness side of the connector. D. Restore the electrical power to the engine ECM. E. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic codes to become active. F. Select diagnostic tests from Cat ET. G. Select the Override Parameters screen on Cat ET. H. Activate the override for the oil renewal solenoid. I. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic code to become active. J. Disable the override for the oil renewal solenoid. Remove the jumper wire.
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Expected Result: A short circuit diagnostic code -6 is active when the jumper wire is installed. An open circuit diagnostic code -5 is active when the jumper wire is removed. Results:
Note: Wait at least 30 seconds in order for the diagnostic codes to become active. c. Select diagnostic tests from Cat ET. d. Select the Override Parameters screen on Cat ET. e. Activate the override for the oil renewal solenoid. f. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic code to become active. g. Disable the override for the oil renewal solenoid. F. Create a short at the ECM: a. Create a short between the jumper wire for the solenoid and engine ground. b. Monitor the Active Diagnostic Code screen on Cat ET. Wait at least 30 seconds for activation of the code. c. Select diagnostic tests from Cat ET. d. Select the Override Parameters screen on Cat ET. e. Activate the override for the oil renewal solenoid. f. Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic code to become active. g. Disable the override for the oil renewal solenoid. h. Remove the electrical power from the engine ECM. G. Restore all wiring to the original conguration. Expected Result: An open circuit diagnostic code -5 is active when the circuit is open. A short circuit diagnostic code -6 is active when the jumper wire for the solenoid is shorted to engine ground.
when the jumper wire is installed. An open circuit diagnostic code -5 is active when the jumper wire is removed. Repair: The engine harness and the ECM are OK. Temporarily connect a new oil renewal solenoid to the harness, but do not install the new solenoid. Verify that there are no active diagnostic codes for the oil renewal solenoid. If there are no active diagnostic codes for the solenoid, permanently install the new solenoid. Clear any logged diagnostic codes. STOP.
remains active with the jumper in place. The open circuit is between the ECM and the connector for the oil renewal solenoid. There may be a problem with the ECM. Proceed to Test Step 5.
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Results:
when the circuit is open. A short circuit diagnostic code -6 is active when the jumper wire for the solenoid is shorted to engine ground. Repair: The ECM is operating properly. The problem is in the harness wiring between the ECM and the connector for the oil renewal solenoid. There may be a problem in one of the connectors. Repair the connectors or wiring and/or replace the connectors or wiring. STOP.
The open circuit diagnostic code -5 is not active when the circuit is open. The short circuit diagnostic code -6 is not active when the wire jumper is shorted to engine ground. Repair: The solenoid and the harness are OK. The ECM does not appear to be operating properly. Perform the following procedure: 1. Temporarily connect a test ECM. Refer to Troubleshooting, ECM - Replace. 2. Recheck the circuit in order to ensure that the original problem has been resolved. If the problem is resolved with the test ECM, install the suspect ECM. If the problem returns with the suspect ECM, replace the ECM. Verify that the problem is resolved. If the problem is not resolved with the test ECM, install the original ECM. There is a problem in the wiring. STOP.
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Prelubrication - Test
SMCS Code: 1319-038 System Operation Description: Use this procedure to troubleshoot the electrical system if a problem is suspected with a prelubrication system or if one of the diagnostic codes in Table 40 is active or easily repeated.
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Table 40
Diagnostic Codes Table Description 338-5 Engine Pre-Lube Pump Relay current below normal Conditions which Generate this Code The engines Electronic Control Module (ECM) detects an open in the circuit for the engine prelubrication relay. The ECM detects a short to battery voltage in the circuit for the prelubrication relay. The ECM detects a short in the circuit for the prelubrication relay. System Response The code is logged.
The ECM has the ability to automatically lubricate the engine before cranking. This may increase the life of certain engine parts by lubricating these parts before the starting motor is engaged. The charge pressure status of the prelubrication system may be communicated to several different controllers that are on the application. Depending on the status that is communicated there could be an effect on the engine starting. The prelubrication system is activated at ECM powerup. The ECM prevents the starting motor from engaging while the pump builds pressure in the engines lubrication system. The ECM determines the charge pressure status via the engine oil pressure sensor. An override for the prelubrication system is available in Caterpillar Electronic Technician (ET). The override allows the technician to activate the prelubrication system for service and testing. The test is functional only when the engine speed is zero rpm. The test is accessed by selecting the following menus on Cat ET:
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Location of the connectors at the ECM for the 20 cylinder engines (typical left side engine view) (1) J2/P2 ECM connector (2) Left rail connectors (3) J1/P1 ECM connector
Location of the connectors at the ECM for the 16 cylinder engines (typical left side engine view) (1) J2/P2 ECM connector (2) Left rail connectors (3) J1/P1 ECM connector
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Illustration 120
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Location of the connectors for the prelubrication pump and the prelubrication relay (4) Battery wiring harness for the engine prelube pump (5) Prelubrication pump (6) Prelubrication relay (7) Harness connector for the engine prelubrication relay
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Terminal locations at the P1 ECM connector for the prelubrication system (P1-12) Prelubrication relay
A. Remove the electrical power from the ECM. B. Thoroughly inspect connectors (1), (2), (3), (7), and (8). Also, thoroughly inspect the connections for harness (4) and relay (6). Refer to Troubleshooting, Electrical Connectors - Inspect for the proper procedure for inspecting the connectors and the wiring.
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Illustration 124
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Terminal locations at the machine interface connector for the prelubrication system (Terminal 29) Prelubrication relay (Terminal 37) Digital Return
Illustration 123
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Terminal locations at the P2 ECM connector for the prelubrication system (P2-14) Digital return
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(7) Blade terminals for the control circuit at the prelubrication relay (8) Terminal bolts for the secondary circuit at the prelubrication relay
C. Perform a 45 N (10 lb) pull test on each of the wires in the ECM connectors and the other connections that are associated with the circuit. D. Check the allen head screw for each of the ECM connectors for the proper torque. Refer to Troubleshooting, Electrical Connectors - Inspect for details.
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E. Check the harness and the wiring for abrasion and for pinch points. Expected Result: All connectors, pins, and sockets are completely coupled and/or inserted. The harness and wiring are free of corrosion, of abrasion, and of pinch points. Results:
Repair: The harness and the ECM are OK. The short circuit is in the prelubrication relay. Perform the following repair: 1. Temporarily connect a new prelubrication relay. 2. Recheck the circuit in order to ensure that the original problem is resolved with the installation of the new relay. 3. If the problem is resolved with the new relay, reconnect the suspect relay. If the problem returns with the suspect relay, permanently install the new relay.
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2. Recheck the circuit in order to ensure that the original problem is resolved with the installation of the new relay. 3. If the problem is resolved with the new relay, reinstall the suspect relay. If the problem returns with the installation of the suspect relay, permanently install the new relay. Clear any logged diagnostic codes. STOP.
There is a short between the prelubrication relay and the ECM. There may be a problem with the ECM. Proceed to Test Step 5.
Test Step 4. Create a Short at the Connector for the Prelubrication Relay
A. Remove the electrical power from the ECM. B. Fabricate a jumper wire that is long enough to create a short circuit between the terminals of the harness connector for the prelubrication relay. Crimp blade terminals to each end of the jumper wire. C. Install the jumper wire between the terminals of the harness connector at the prelubrication relay. D. Restore the electrical power to the ECM. E. Select diagnostic tests from Cat ET. F. Select the Override Parameters screen on Cat ET. G. Activate the override for the prelubrication system. H. Monitor the active diagnostic code screen on Cat ET. Check the prelubrication system for an active diagnostic code. Note: Wait at least 30 seconds in order for the diagnostic code to become active. I. Disable the override for the prelubrication system. J. Remove the electrical power from the ECM. K. Restore the wiring to the original conguration. Expected Result: A -6 diagnostic code is active when the jumper wire is installed. A -5 diagnostic code is active when the jumper wire is removed. Results:
with the jumper in place. The open circuit is between the ECM and the connector for the prelubrication relay. There may be a problem with the ECM. Proceed to Test Step 5.
jumper wire is installed. A -5 diagnostic code is active when the jumper wire is removed. Repair: The engine harness and the ECM are OK. The open circuit is in the coil of the prelubrication relay. Perform the following repair: 1. Temporarily connect a new prelubrication relay.
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g. Disable the override for the prelubrication system. G. Check the Operation of the ECM by Creating a Short Circuit at the ECM Connector: a. Short circuit the loose ends of the jumper wires that are for the prelubrication relay. b. Restore the electrical power to the ECM. c. Monitor the active diagnostic code screen on Cat ET. Check the prelubrication system for an active diagnostic code. Note: Wait at least 30 seconds in order for the diagnostic codes to become active. d. Select diagnostic tests from Cat ET. e. Select the Override Parameters screen on Cat ET. f. Activate the override for the prelubrication system. g. Disable the override for the prelubrication system. H. Remove the electrical power from the ECM. I. Restore the wiring to the original conguration. Expected Result: A -5 diagnostic code is active when the loose ends of the wires for the prelubrication relay are open at the ECM connector. A -6 diagnostic code is active when the loose ends of the wires for the prelubrication relay are shorted at the ECM connector. Results:
The -5 diagnostic code is not active when the loose ends of the wires for the prelubrication relay are open at the ECM connector. The -6 diagnostic code is not active when the loose ends of the wires for the prelubrication relay are shorted at the ECM connector. Repair: The ECM is not operating properly. Perform the following repair: 1. Temporarily connect a test ECM. Refer to Troubleshooting, ECM - Replace . 2. Recheck the circuit in order to ensure that the original problem has been resolved. If the problem is resolved with the test ECM, install the suspect ECM. If the problem returns with the suspect ECM, replace the ECM. Verify that the problem is resolved. If the problem is not resolved with the test ECM, install the original ECM. There is a problem in the wiring. Retest the circuit. STOP.
Test Step 6. Check the Voltage to the Secondary Circuit of the Prelubrication Relay
A. Disconnect the wire that is between the prelubrication relay and the prelubrication motor from the terminal bolt at the prelubrication relay. B. Connect a voltmeter between the terminal bolt of the relay and the engine ground stud. C. Restore the electrical power to the ECM. D. Proceed to the Diagnostic Overrides screen on Cat ET. E. Activate the override for the prelubrication system. F. Measure the voltage at the terminal bolt. G. Remove the electrical power from the ECM. H. Restore the wiring to the original conguration. Expected Result: The voltage measures 24 3 VDC. Results:
Repair: The ECM is operating properly. The problem is in the wiring between the ECM and the prelubrication relay. Repair the connectors or wiring and/or replace the connectors or wiring. Verify that the original problem has been resolved. STOP.
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Repair: Voltage is present at the relay, but voltage is not present at the motor. There is a problem with the wiring that is between the prelubrication relay and the prelubrication motor. Repair the wiring or replace the wiring. Verify that the original problem has been resolved. STOP.
problem in the wiring harness at the prelubrication motor. Repair: Repair the connectors or wiring and/or replace the connectors or wiring. STOP.
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Diagnostic Codes Table Description 100-3 Engine Oil Pressure Sensor voltage above normal Conditions which Generate this Code The Electronic Control Module (ECM) detects signal voltage that is above normal for eight seconds. The ECM has been powered for at least two seconds. Engine speed equals 0 rpm or the engine coolant temperature is less than 38 C (100 F). The ECM detects signal voltage that is below normal for eight seconds. The ECM has been powered for two seconds. The sensor must detect a barometric pressure that is at least 55 kPa (8 psi) (absolute pressure) before the diagnostic code will be enabled. The ECM detects signal voltage that is above normal for thirty seconds. The ECM has been powered for two seconds. The ECM detects signal voltage that is below normal for thirty seconds. The ECM has been powered for two seconds. The ECM detects signal voltage that is above normal for thirty seconds. The ECM has been powered for four seconds. The ECM detects signal voltage that is below normal for thirty seconds. The ECM has been powered for four seconds.
(continued)
System Response The code is logged. If the signal is valid, the parameter will use the value from the sensor for the unltered oil pressure. If the signal is not valid, the value of the parameter will be set to 600 kPa (87 psi).
The code is logged. The value of the parameter will be set to the value from the barometric pressure sensor.
The code is logged. The value of the parameter will be set to the value from a map dependent value that is stored in the ECM.
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Diagnostic Codes Table Description 289-3 Fuel Pressure Sensor - Before Fuel Filter voltage above normal Conditions which Generate this Code The ECM detects signal voltage that is above normal for ten seconds. The ECM has been powered for two seconds. The ECM detects signal voltage that is below normal for ten seconds. The ECM has been powered for two seconds. The sensor must detect a barometric pressure that is at least 55 kPa (8 psi) (absolute pressure) before the diagnostic code will be enabled. The ECM detects signal voltage that is above normal for eight seconds. The ECM has been powered for at least two seconds. The pressure for this sensor must be less than 1100 kPa (160 psi) in order for this diagnostic to be enabled. The ECM detects signal voltage that is below normal for eight seconds. The ECM has been powered for two seconds. The sensor must detect a barometric pressure that is at least 55 kPa (8 psi) (absolute pressure) before the diagnostic code will be enabled. The ECM detects signal voltage that is above normal for eight seconds. The ECM has been powered for at least two seconds. The pressure for this sensor must be less than 1100 kPa (160 psi) in order for this diagnostic to be enabled. The ECM detects signal voltage that is below normal for eight seconds. The ECM has been powered for two seconds. The sensor must detect a barometric pressure that is at least 55 kPa (8 psi) (absolute pressure) before the diagnostic code will be enabled. The ECM detects signal voltage that is above normal for two seconds. The ECM detects signal voltage that is below normal for two seconds. The sensor must detect a barometric pressure that is at least 55 kPa (8 psi) (absolute pressure) before the diagnostic code will be enabled. The ECM detects signal voltage that is above normal. The ECM detects signal voltage that is below normal. The ECM detects signal voltage that is above normal. The code is logged. The value of the parameter will be set to 320 kPa (46 psi) (absolute pressure). The code is logged. The value of the parameter will be set to 600 kPa (87 psi). System Response The code is logged. If the signal is valid, the value of the parameter will be set to the value from the fuel pressure sensor after the fuel lter. If the signal is not valid, the value of the parameter will be set to 600 kPa (87 psi).
289-4 Fuel Pressure Sensor - Before Fuel Filter voltage below normal
460-3 Fuel Pressure Sensor - After Fuel Filter voltage above normal
The code is logged. The value of the parameter will be set to 15 kPa (2 psi) less than the value from the fuel pressure sensor before the fuel lter.
460-4 Fuel Pressure Sensor - After Fuel Filter voltage below normal
542-3 Engine Oil Pressure Sensor Before Oil Filter voltage above normal
542-4 Engine Oil Pressure Sensor Before Oil Filter voltage below normal
1785-3 Intake Manifold Pressure Sensor voltage above normal 1785-4 Intake Manifold Pressure Sensor voltage below normal
1797-3 Fuel Rail Pressure Sensor voltage above normal 1797-4 Fuel Rail Pressure Sensor voltage below normal 2247-3 Fuel Transfer Pump Inlet Pressure Sensor voltage above normal
The code is logged. The engine power is derated to a default torque map while the code is active.
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Diagnostic Codes Table Description 2247-4 Fuel Transfer Pump Inlet Pressure Sensor voltage below normal 2302-3 Engine Coolant Pump Outlet Pressure Sensor voltage above normal 2302-4 Engine Coolant Pump Outlet Pressure Sensor voltage below normal 2738-3 Turbocharger #1 Compressor Inlet Pressure Sensor voltage above normal 2738-4 Turbocharger #1 Compressor Inlet Pressure Sensor voltage below normal 2739-3 Turbocharger #2 Compressor Inlet Pressure Sensor voltage above normal 2739-4 Turbocharger #2 Compressor Inlet Pressure Sensor voltage below normal 2740-3 Turbocharger #3 Compressor Inlet Pressure Sensor voltage above normal 2740-4 Turbocharger #3 Compressor Inlet Pressure Sensor voltage below normal 2741-3 Turbocharger #4 Compressor Inlet Pressure Sensor voltage above normal 2741-4 Turbocharger #4 Compressor Inlet Pressure Sensor voltage below normal 3031-3 Intake Manifold #2 Pressure Sensor voltage above normal 3031-4 Intake Manifold #2 Pressure Sensor voltage below normal Conditions which Generate this Code The ECM detects signal voltage that is below normal. The ECM detects signal voltage that is above normal for ten seconds. The ECM detects signal voltage that is below normal for ten seconds. The ECM detects signal voltage that is above normal for 20 seconds. The ECM detects signal voltage that is below normal for 20 seconds. The ECM detects signal voltage that is above normal for 20 seconds. The ECM detects signal voltage that is below normal for 20 seconds. The ECM detects signal voltage that is above normal for 20 seconds. The ECM detects signal voltage that is below normal for 20 seconds. The ECM detects signal voltage that is above normal for 20 seconds. The ECM detects signal voltage that is below normal for 20 seconds. The ECM detects signal voltage that is above normal for ten seconds. The ECM detects signal voltage that is below normal for two seconds. The sensor must detect a barometric pressure that is at least 55 kPa (8 psi) (absolute pressure) before the diagnostic code will be enabled. System Response The code is logged. The code is logged. The value of the parameter will be set to 75 kPa (11 psi).
The code is logged. An average pressure is calculated from the other turbocharger compressor inlet pressure sensors. The value of this parameter will be set to the calculated value. The code is logged. An average pressure is calculated from the other turbocharger compressor inlet pressure sensors. The value of this parameter will be set to the calculated value. The code is logged. An average pressure is calculated from the other turbocharger compressor inlet pressure sensors. The value of this parameter will be set to the calculated value. The code is logged. An average pressure is calculated from the other turbocharger compressor inlet pressure sensors. The value of this parameter will be set to the calculated value. The code is logged. The value of the parameter will be set to 320 kPa (46 psi) (absolute pressure).
System Operation Use this procedure to troubleshoot any suspect problems with the following sensors:
Filtered fuel pressure sensor Pressure sensor for the inlet of the fuel transfer
pump
Atmospheric pressure sensor Crankcase pressure sensor Engine coolant pump outlet pressure sensor Filtered oil pressure sensor
Fuel rail pressure sensor Left intake manifold pressure sensor Right intake manifold pressure sensor Turbocharger 1 compressor inlet pressure sensor
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Turbocharger 2 compressor inlet pressure sensor Turbocharger 3 compressor inlet pressure sensor Turbocharger 4 compressor inlet pressure sensor Unltered fuel pressure sensor Unltered oil pressure sensor
Background Information The ECM continuously creates a pull-up voltage on the signal wire for each sensor. The ECM uses this pull-up voltage in order to detect a problem in the signal circuit. When the ECM detects voltage that is above a threshold on the signal wire, the ECM activates a high voltage -3 diagnostic code. When the ECM detects voltage that is below a threshold on the signal wire, the ECM activates a low voltage -4 diagnostic code. Note: There may be a delay of 30 seconds or more in order for Caterpillar Electronic Technician (ET) to display an active diagnostic code. When you check for a diagnostic code, be sure to wait at least 30 seconds. The following components can cause these codes:
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Illustration 126 Schematic for the analog sensors (16 cylinder and 20 cylinder engines)
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Illustration 127 Locations of the analog sensors (right side engine view) (1) (2) (3) (4) (5) (6) Filtered oil pressure sensor Unltered oil pressure sensor Crankcase pressure sensor Fuel transfer inlet pressure sensor Unltered fuel pressure sensor Filtered fuel pressure sensor
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Illustration 129
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Locations of the components that are for the analog sensor signal for the 20 cylinder engines (front side engine view) (10) Coolant pump outlet pressure sensor (11) Right rail connector (12) J2/P2 ECM connectors (13) Left rail connector (14) J1/P1 ECM connectors (15) Atmospheric pressure sensor
Illustration 128 (7) Right intake manifold pressure sensor (8) Pressure sensor for the high pressure fuel rail (9) Left intake manifold pressure sensor
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Illustration 131
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Locations of the machine interface connectors (left rear engine view) (16) Machine interface connector
Illustration 130
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Locations of the components that are for the analog sensor signal for the 16 cylinder engines (front left side engine view) (10) Coolant pump outlet pressure sensor (11) Right rail connector (12) J2/P2 ECM connectors (13) Left rail connector (14) J1/P1 ECM connectors (15) Atmospheric pressure sensor
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Illustration 132 (P1-15) Turbocharger 3 compressor inlet pressure (P1-17) Inlet pressure at the fuel transfer pump (P1-27) Coolant pump outlet pressure
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Illustration 133 (P2-15) Left intake manifold pressure (P2-16) Filtered fuel pressure (P2-17) Analog return (P2-27) Turbocharger 1 compressor inlet pressure (P2-28) Filtered oil pressure (P2-30) Analog return (P2-38) Turbocharger 4 compressor inlet pressure (P2-40) Unltered fuel pressure (P2-41) Left intake manifold pressure (P2-57) Atmospheric pressure (P2-66) Turbocharger 2 compressor inlet pressure (P2-72) Analog sensor supply (P2-74) Crankcase pressure (P2-80) Analog sensor supply (P2-81) Analog sensor supply (P2-82) Analog sensor supply (P2-84) Unltered oil pressure (P2-85) Fuel rail pressure
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Illustration 135 (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal 16) Analog sensor supply 17) Coolant pump outlet pressure 27) Analog return 50) Analog sensor supply 52) Filtered oil pressure 53) Filtered fuel pressure 56) Unltered fuel pressure 57) Right intake manifold pressure 65) Crankcase pressure
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Terminal locations for the analog sensors at the right rail connector
Illustration 134 (Terminal 18) Left intake manifold pressure (Terminal 20) Analog return (Terminal 32) Analog sensor supply (Terminal 33) Turbocharger 2 compressor inlet pressure (Terminal 34) Turbocharger 4 compressor inlet pressure (Terminal 35) Turbocharger 1 compressor inlet pressure (Terminal 36) Turbocharger 3 compressor inlet pressure (Terminal 37) Analog return (Terminal 39) Fuel rail pressure (Terminal 40) Analog sensor supply
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Terminal locations for the analog sensors at the left rail connector
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C. Monitor the active diagnostic code and the logged diagnostic codes on Cat ET. Note: Wait at least 30 seconds in order for diagnostic codes to become active. Identify the diagnostic code. Results:
Logged code
Repair: Do not troubleshoot a logged code unless the code relates to an operator complaint. If the code is logged and the code does not relate to an operator complaint, clear the code. If the code is logged and the code relates to an operator complaint, proceed to Test Step 2.
Active code Proceed to Test Step 3. Test Step 2. Check the Integrity of the Connections at the Connectors
A. Restore the electrical power to the ECM. Do not start the engine.
Illustration 136
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Terminal locations for the analog sensors at the machine interface connector (16 and 20 cylinder engines) (Terminal 7) Analog sensor supply (Terminal 8) Turbocharger 2 compressor inlet pressure (Terminal 9) Turbocharger 4 compressor inlet pressure (Terminal 30) Turbocharger 1 compressor inlet pressure (Terminal 31) Turbocharger 3 compressor inlet pressure (Terminal 32) Analog return
B. Install a 7X-1708 Multimeter Probe (RED) and a 7X-1709 Multimeter Probe (BLACK) onto the test leads of a multimeter. Note: Ensure that the multimeter probes are in good repair. Bent probes may contact other terminals inside the connector. C. Check for an intermittent problem at the connector for the suspect sensor: Note: Do not disconnect any harness connectors in order to perform this procedure. a. Carefully install the spoons (multimeter probes) into the terminal locations for the sensor supply and the sensor return at the appropriate ECM connector. b. While you observe the voltage reading on the multimeter, wiggle the wires and pull on the wires at the connector for the suspect sensor.
Illustration 137 Sensor connector (Terminal 1) Analog sensor supply (Terminal 2) Sensor return (Terminal 3) Signal
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The voltage reading will not vary more than 0.5 volts for a solid electrical connection. c. Remove the spoons (multimeter probes) from the connector. D. Check for an intermittent problem at the ECM connector: Note: Do not disconnect any harness connectors in order to perform this procedure.
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a. Carefully install the spoons (multimeter probes) into the terminal locations for the sensor supply and the sensor return at the connector for the suspect sensor. b. While you observe the voltage reading on the multimeter, wiggle the wires and pull on the wires for the pressure sensor supply and the sensor return at the ECM connector. The voltage reading will not vary more than 0.5 volts for a solid electrical connection. c. Remove the spoons (multimeter probes) from the connector. E. Remove the electrical power from the ECM. Expected Result: The voltage reading did not vary more than 0.5 volts during either test. Results:
Results:
VDC. The supply voltage is available at the sensor connector. Record the voltage measurement. If you are troubleshooting a -3 diagnostic code, proceed to Test Step 4. If you are troubleshooting a -4 diagnostic code, proceed to Test Step 7. voltage is greater than 5.5 VDC.
+Battery voltage. The signal wire is not shorted to the +Battery. Proceed to Test Step 5. approximately equal to the +Battery voltage. The signal wire is shorted to the +Battery. Repair: Repair the wiring, when possible. Replace parts, if necessary. Verify that the problem is resolved. STOP.
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Expected Result: The -3 code does not change to a -4 code when the jumper wire is connected. Results:
Repair: Repair the wiring, when possible. Replace parts, if necessary. Verify that the problem is resolved. STOP.
when the jumper wire is connected. Connect the sensor. There is a problem with the wiring harness or with the ECM. Proceed to Test Step 6. the jumper wire is connected. The wiring harness and the ECM are OK. Repair: Perform the following procedure: 1. Remove the jumper wire. 2. Connect a new sensor to the engine harness. Do not install the sensor into the engine. 3. Verify that the active -3 diagnostic code does not recur. 4. Install the sensor into the engine. 5. Clear all logged diagnostic codes and return the engine to service. STOP.
code remains. There is a problem with the wiring harness or with the ECM. Proceed to Test Step 8. code changes to a -3 code. The harness and the ECM are OK. There is a problem with the sensor. Repair: Perform the following procedure: 1. Connect a new sensor to the engine harness. Do not install the sensor into the engine.
installed. The ECM detected the jumper wire at the ECM connector. However, the ECM did not detect the jumper wire at the harness connector for the sensor. There is an open circuit in the wiring.
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2. Verify that the active -4 diagnostic code does not recur. 3. Install the sensor into the engine. 4. Clear all logged diagnostic codes and return the engine to service. STOP.
If the problem is resolved with the test ECM, install the suspect ECM. If the problem returns with the suspect ECM, replace the ECM. Verify that the problem is resolved. If the problem is not resolved with the test ECM, install the original ECM. There is a problem in the wiring. STOP.
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is disconnected from the connector at the ECM. The ECM detected the open circuit at the ECM connector. However, the ECM did not detect the open circuit at the harness connector for the sensor. There is a problem with the wiring between the ECM connector and the harness connector for the sensor. There may be a problem with a connector. Repair: Repair the wiring or the connector, when possible. Replace parts, if necessary. Verify that the problem is resolved. STOP.
wire is disconnected from the ECM connector. The ECM did not detect the open circuit at the ECM connector. There is a problem with the ECM. Repair: The ECM does not detect the open circuit at the ECM connector. There is a problem with the ECM. Perform the following procedure: 1. Temporarily connect a test ECM. Refer to Troubleshooting, ECM - Replace. 2. Recheck the circuit in order to ensure that the original problem has been resolved.
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Table 42
Diagnostic Codes Table Description 110-3 Engine Coolant Temperature Sensor voltage above normal Conditions which Generate this Code The engines Electronic Control Module (ECM) detects signal voltage that is greater than 4.95 VDC for eight seconds. The ECM has been powered for at least two seconds. The ECM detects signal voltage that is less than 0.2 VDC for eight seconds. The ECM has been powered for at least two seconds. The ECM detects signal voltage that is greater than 4.95 VDC for eight seconds. The ECM has been powered for at least two seconds. The ECM detects signal voltage that is less than 0.2 VDC for eight seconds. The ECM has been powered for at least two seconds. The ECM detects signal voltage that is greater than 4.95 VDC for eight seconds. The ECM has been powered for at least two seconds. System Response The code is logged after seven minutes. The value of the parameter is set to 90 C (194 F). The engine will not enter cold mode while the code is active. The code is logged. The value of the parameter is set to 90 C (194 F). The engine will not enter cold mode while the code is active. Ambient temperature must be greater than 35 C (31 F) in order to allow logging of this diagnostic. The value of the parameter is set to 85 C (185 F). Ambient temperature must be less than 140 C (284 F) in order to allow logging of this diagnostic. The value of the parameter is set to 85 C (185 F). Engine coolant temperature must be above 10 C (14 F) in order to allow logging of this diagnostic. The value of the parameter is set to the value of the engine coolant temperature. The code is logged. The value of the parameter is set to the value of the engine coolant temperature. Ambient temperature must be greater than 35 C (31 F) in order to allow logging of this diagnostic. The value of the parameter is set to the value of the engine coolant temperature. The code is logged. The value of the parameter is set to the value of the engine coolant temperature. The code will not be logged if the actual temperature is below 30 C (22 F). The code may be active or the logged code may be pending until this temperature is reached. The value of the parameter is set to the value of the other intake manifold temperature sensor. If both sensor signals are lost, a value of 85 C (185 F) will be used.
(continued)
The ECM detects signal voltage that is less than 0.2 VDC for eight seconds. The ECM has been powered for at least two seconds. The ECM detects signal voltage that is greater than 4.95 VDC for eight seconds. The ECM has been powered for at least two seconds.
The ECM detects signal voltage that is less than 0.2 VDC for eight seconds. The ECM has been powered for at least two seconds. The ECM detects signal voltage that is greater than 4.95 VDC for eight seconds. The ECM has been powered for at least two seconds.
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Diagnostic Codes Table Description 1796-4 Intake Manifold #2 Air Temperature Sensor voltage below normal Conditions which Generate this Code The ECM detects signal voltage that is less than 0.2 VDC for eight seconds. The ECM has been powered for at least two seconds. System Response Ambient temperature must be less than 140 C (284 F) in order to allow logging of this diagnostic. The code may be active or the logged code may be pending until this temperature is reached. The value of the parameter is set to the value of the other intake manifold temperature sensor. If both sensor signals are lost, a value of 85 C (185 F) will be used. Ambient temperature must be greater than 35 C (31 F) in order to allow logging of this diagnostic. The value of the parameter is set to the value of the engine coolant temperature. Ambient temperature must be less than 140 C (284 F) in order to allow logging of this diagnostic. The value of the parameter is set to the value of the engine coolant temperature.
The ECM detects signal voltage that is greater than 4.95 VDC for eight seconds. The ECM has been powered for at least two seconds.
The ECM detects signal voltage that is less than 0.2 VDC for eight seconds. The ECM has been powered for at least two seconds.
System Operation Use this procedure to troubleshoot any suspect problems with the following sensors:
Engine coolant temperature sensor Engine oil temperature sensor Filtered fuel temperature sensor Left intake manifold air temperature sensor Right intake manifold air temperature sensor (No 2) High pressure fuel temperature sensor
The sensor signal for the passive sensors is routed to terminal 1 of each sensor connector. The analog return for the passive sensors is routed from the ECM to terminal 2 of each sensor connector. The following components can cause these codes:
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Illustration 139 Locations of the analog sensors (right side engine view) (1) Filtered oil temperature sensor (2) Filtered fuel temperature sensor (3) High pressure fuel temperature sensor
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Illustration 140 Locations of the analog sensors (top side engine view) (4) Right intake manifold air temperature sensor (5) Left intake manifold air temperature sensor (No 2)
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Illustration 141
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Illustration 142
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Locations of the components for the analog sensors for the 20 cylinder engines (front side engine view) (6) Engine block outlet coolant temperature sensor (7) J2/P2 ECM connectors (8) Right rail connector (9) J1/P1 ECM connectors (10) Left rail connector
Locations of the components that are for the analog sensors for the 16 cylinder engines (front side engine view) (6) Engine block outlet coolant temperature sensor (7) J2/P2 ECM connectors (8) Right rail connector (9) J1/P1 ECM connectors (10) Left rail connector
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Illustration 144 (P2-13) Right intake manifold air temperature (No 2) (P2-17) Analog return (P2-30) Analog return (P2-56) Left intake manifold air temperature (P2-62) Filtered fuel temperature (P2-94) High pressure fuel rail temperature (P2-96) Filtered engine oil temperature
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Illustration 146
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Terminal locations at the right rail connector that are for the analog sensors (Terminal 14) Engine coolant temperature (Terminal 27) Analog return (Terminal 48) Right intake manifold air temperature (No 2) (Terminal 49) Filtered fuel temperature (Terminal 55) High pressure fuel temperature (Terminal 59) Filtered engine oil temperature
Illustration 145
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Terminal locations at the left rail connector that are for the analog sensors (Terminal 20) Analog return (Terminal 21) Left intake manifold air temperature
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Note: Wait at least 30 seconds in order for the diagnostic codes to become active. D. Determine if the problem is active and related to one of the following diagnostic codes:
C. Disconnect the connector from the suspect sensor. D. Use the wire jumper in order to create a short between terminal 1 (sensor signal) and terminal 2 (analog return) on the harness side of the sensor connector. E. Restore power to the ECM. F. Access the Active Diagnostic Code screen on Cat ET. Check for an active -4 diagnostic code for the suspect sensor. Note: Wait at least 30 seconds in order for the diagnostic codes to become active. G. Remove power from the ECM. Expected Result: A -4 diagnostic code is now active for the suspect sensor(s). Results:
Not OK An active -4 diagnostic code is present. Test Step 2. Check for a Short Circuit to the +Battery at the Sensor Connector
A. Measure the voltage on the harness side of the sensor connector between pin 1 and pin 2 for the suspect sensor(s). Expected Result: The voltage is less than battery voltage. Results:
creating the short at the sensor connector. A -4 diagnostic code became active after creating the short at the sensor connector. Repair: Temporarily connect a new sensor to the harness, but do not install the new sensor in the engine. Verify that there are no active diagnostic codes for the sensor. If there are no active diagnostic codes for the sensor, permanently install the new sensor. Clear any logged diagnostic codes. STOP.
Test Step 4. Create an Open Circuit at the Connector for the Suspect Sensor
A. Remove power from the ECM. B. Disconnect the sensor connector of the suspect sensor(s) with the active -4 diagnostic code. C. Restore power to the ECM. D. Access the Active Diagnostic Code screen on Cat ET. Check for an active -3 diagnostic code. Note: Wait at least 30 seconds in order for the diagnostic codes to become active. E. Remove power from the ECM.
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Expected Result: A -3 diagnostic code is now active for the suspect sensor(s). Results:
G. Check the operation of the ECM by creating a short circuit at the ECM: a. Connect the loose end of the jumper wire to the ECM ground strap. b. Monitor the Active Diagnostic Code screen on Cat ET. Note: Wait at least 30 seconds in order for the diagnostic codes to become active. A -4 diagnostic code will be active when the wire jumper is connected to the engine ground stud. c. Remove power from the ECM. Restore the wiring to the original conguration. Expected Result: A -3 diagnostic code is active when the sensor signal wire is removed from the ECM connector. A -4 diagnostic code is active when the signal wire is connected to engine ground. Results:
disconnecting the sensor. A -3 diagnostic code became active after disconnecting the sensor. Repair: Temporarily connect a new sensor to the harness, but do not install the new sensor in the engine. Verify that there are no active diagnostic codes for the sensor. If there are no active diagnostic codes for the sensor, permanently install the new sensor. Clear any logged diagnostic codes. STOP.
Repair: If the code is active for more than one sensor, the problem is most likely in the return wire for the sensor. Repair the return wire for the sensor or replace the harness. If the code is only active for one sensor, the problem is most likely in the signal wire for the sensor. Repair the signal wire for the sensor. STOP.
The -3 diagnostic code is not active when the sensor signal wire is disconnected. The -4 diagnostic code is not active when the wire jumper is installed. Repair: There is a problem with the ECM. Perform the following procedure: 1. Temporarily connect a test ECM. Refer to Troubleshooting, ECM - Replace. 2. Recheck the circuit in order to ensure that the original problem has been resolved.
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If the problem is resolved with the test ECM, install the suspect ECM. If the problem returns with the suspect ECM, replace the ECM. Verify that the problem is resolved. If the problem is not resolved with the test ECM, install the original ECM. There is a problem in the wiring. STOP.
i02872898
Diagnostic Codes Table Description 91-8 Throttle Position Sensor abnormal frequency, pulse width, or period Conditions which Generate this Code The Electronic Control Module (ECM) detects a duty cycle that is less than 7 percent, or the ECM detects a duty cycle that is greater than 95 percent. The ECM detects a duty cycle that is greater than 96 percent for ten seconds. The ECM detects a duty cycle that is less than 4 percent for ten seconds. The ECM detects a sensor frequency that is greater than 600 Hz or less than 400 Hz. The ECM detects a duty cycle that is greater than 96 percent for ten seconds. The ECM detects a duty cycle that is less than 4 percent for ten seconds. The ECM detects a sensor frequency that is greater than 600 Hz or less than 400 Hz. The ECM detects a duty cycle that is greater than 96 percent for ten seconds. The ECM detects a duty cycle that is less than 4 percent for ten seconds. The ECM detects a sensor frequency that is greater than 600 Hz or less than 400 Hz. System Response The code is logged.
171-3 Ambient Air Temperature Sensor voltage above normal 171-4 Ambient Air Temperature Sensor voltage below normal 171-8 Ambient Air Temperature Sensor abnormal frequency, pulse width, or period 1491-3 Right Turbo Turbine Inlet Temperature Sensor voltage above normal 1491-4 Right Turbo Turbine Inlet Temperature Sensor voltage below normal 1491-8 Right Turbo Turbine Inlet Temperature Sensor abnormal frequency, pulse width, or period 1492-3 Left Turbo Turbine Inlet Temperature Sensor voltage above normal 1492-4 Left Turbo Turbine Inlet Temperature Sensor voltage below normal 1492-8 Left Turbo Turbine Inlet Temperature Sensor abnormal frequency, pulse width, or period
The code is logged. If the signal from the other exhaust temperature sensor is OK, the signal from that sensor is used. If the signal from the other exhaust temperature sensor is not OK, a default value of 0 C (32 F) is used.
The code is logged. If the signal from the other exhaust temperature sensor is OK, the signal from that sensor is used. If the signal from the other exhaust temperature sensor is not OK, a default value of 0 C (32 F) is used.
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System Operation Use this procedure to troubleshoot any suspect problems with the following sensors:
Throttle position sensor Sensor for the right turbocharger turbine inlet
temperature
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Illustration 148 Schematic of the PWM sensors for the sensor signal circuit
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Illustration 149
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Illustration 150
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Location of the connectors that are for the sensor signal circuit for the 16 cylinder engines (left side engine view) (1) (2) (3) (4) J2/P2 ECM connector Right rail connector Left rail connector J1/P1 ECM connector
Location of the connectors that are for the sensor signal circuit for the 20 cylinder engines (left side engine view) (1) (2) (3) (4) J2/P2 ECM connector Right rail connector Left rail connector J1/P1 ECM connector
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Illustration 151
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Location of the connectors that are for the sensor signal circuit (left rear engine view) (5) Machine interface connector
Illustration 153
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Terminal locations at the P1 ECM connector that are for the sensors for the turbocharger turbine inlet temperature (P1-1) Ambient air temperature (P1-18) Digital return (P1-66) Throttle position Illustration 152 Location of the temperature sensors for the inlet of the turbocharger turbines (top front engine view) (6) Exhaust sensor for the left turbocharger turbine inlet temperature (7) Exhaust sensor for the right turbocharger turbine inlet temperature
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Illustration 155
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Terminal locations at the left rail connector that are for the sensor for the left turbocharger turbine inlet temperature (Terminal 23) Ambient air temperature (Terminal 28) Digital supply (Terminal 31) Digital return (Terminal 38) Left turbocharger turbine inlet temperature
Illustration 154
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Terminal locations at the P2 ECM connector that are for the sensors for the turbocharger turbine inlet temperature (P2-29) Digital supply (P2-65) Left turbocharger turbine inlet temperature (P2-73) Right turbocharger turbine inlet temperature (P2-92) Digital return
Illustration 156
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Terminal locations at the right rail connector that are for the sensor for the right turbocharger turbine inlet temperature (Terminal 6) Digital return (Terminal 64) Right turbocharger turbine inlet temperature (Terminal 67) Digital supply
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Illustration 159 Connector for the ambient air temperature sensor (Terminal 1) Sensor supply (Terminal 2) Sensor return (Terminal 3) Signal
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Illustration 157
B. Monitor the diagnostic codes on Cat ET. Check and record any diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic codes to become active. C. Determine if a diagnostic code has been logged several times. Note: A diagnostic code that is logged several times is an indication of an intermittent problem. Most intermittent problems are the result of a bad connection between a socket and a pin in a connector or a bad connection between a wire and a crimp connection. D. Look for one or more of the following diagnostic codes that are active or logged:
Terminal locations at the machine interface connector that are for the PWM sensors (Terminal (Terminal (Terminal (Terminal 15) 21) 22) 33) Digital return Throttle position Ambient air temperature Digital supply
91-8 171-3
Illustration 158 Sensor connector (Terminal 1) Sensor supply (Terminal 2) Sensor return (Terminal 3) Signal
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1492-4 1492-8
Expected Result: There are no active diagnostic codes for the PWM sensors. Results:
C. Fabricate two jumper wires that are long enough to use as test leads at the ECM connector. Crimp connector sockets to one end of each of the jumper wires. D. Remove the wires for the digital supply from terminal locations P2-29 and P2-92. Install a jumper wire into each of these terminal locations. E. Connect the J2/P2 ECM connectors. F. Restore the electrical power to the ECM. G. Measure the voltage between the jumper wires that are in terminals P2-29 and P2-92. H. Remove the electrical power from the ECM. I. Restore the wiring to the original conguration. Expected Result: The supply voltage at the ECM measures 8.0 0.4 VDC. Results:
listed above are active. The ECM detects a problem in one of the circuits for the PWM sensors. Proceed to Test Step 2.
Test Step 2. Check the Digital Supply Voltage at the Sensor Connector
A. Remove the electrical power from the ECM. B. Disconnect the suspect sensor at the sensor connector: C. Restore the electrical power to the ECM. D. Measure the supply voltage on the harness side of the sensor connector. Measure the voltage between the terminal that is for the supply voltage and the terminal that is for the return. Expected Result: The supply voltage is 8.0 0.4 VDC. Results:
supply voltage is reaching the sensor connector. Proceed to Test Step 4. The supply voltage is not reaching the sensor connector. Proceed to Test Step 3.
Not OK The supply voltage is not 8.0 0.4 VDC. Test Step 3. Check the Digital Supply Voltage at the Supply
A. Remove the electrical power from the ECM. B. Disconnect the J2/P2 ECM connectors.
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Test Step 4. Check the Suspect Sensors Signal Frequency and the Duty Cycle at the Sensor Connector
A. Remove the electrical power from the ECM. B. Remove the suspect sensors signal wire from the appropriate terminal on the sensor side of the sensor connector. C. Reconnect the suspect sensor connector. D. Install a 7X-1709 Multimeter Probe (BLACK) onto the test lead (black) of a multimeter. Note: Ensure that the multimeter probe is in good repair. A bent probe may contact other terminals inside the connector. E. Connect the red multimeter probe to the loose end of the signal wire that is from the sensor. Carefully insert the spoon into the digital return of the sensor connector. F. Restore the electrical power to the ECM. G. Measure the duty cycle and the frequency of the signal at the sensor connector. H. Remove electrical power from the ECM. I. Restore the wiring to the original conguration. Expected Result: For the throttle position sensor, the duty cycle is between 7 to 95 percent. For the temperature sensors, the duty cycle is between 4 to 96 percent. The frequency off the signal is between 400 and 600 Hz. Results:
Repair: The output from the sensor is not within specications. Replace the sensor. Connect the new sensor to the sensor connector and use Cat ET to verify that no diagnostic codes are active for the new sensor before permanently installing the sensor. STOP.
Test Step 5. Check the Suspect Sensors Duty Cycle at the ECM
A. Remove the electrical power from the ECM. B. Use a wire removal tool to remove the signal wire for the suspect sensor from the terminal location at the appropriate ECM connector. Refer to Illustration 148 for the terminal locations of the signal wires. C. Install a 7X-1709 Multimeter Probe (BLACK) onto the test lead (black) of a multimeter. Note: Ensure that the multimeter probe (spoon) is in good repair. A bent probe may contact other terminals inside the connector. D. Connect the red multimeter probe to the loose end of the signal wire. Carefully insert the spoon onto terminal location 92 (digital return) of the J2/P2 ECM connector. E. Restore the electrical power to the ECM. F. Use the multimeter to measure the duty cycle and the signal frequency of the sensor. G. Remove electrical power from the ECM. Restore all wiring to the original conguration. Expected Result: For the throttle position sensor, the duty cycle is between 7 to 95 percent. For the temperature sensors, the duty cycle is between 4 to 96 percent. The frequency off the signal is between 400 and 600 Hz. Results:
OK For the throttle position sensor, the duty cycle is between 7 to 95 percent. For the temperature sensors, the duty cycle is between 4 to 96 percent. The frequency is between 400 and 600 Hz. The sensor is generating the correct signal. Proceed to Test Step 5. frequency is incorrect.
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1. Temporarily connect a test ECM. Refer to Troubleshooting, ECM - Replace. 2. Recheck the circuit in order to ensure that the original problem has been resolved. If the problem is resolved with the test ECM, install the suspect ECM. If the problem returns with the suspect ECM, replace the ECM. Verify that the problem is resolved. If the problem is not resolved with the test ECM, install the original ECM. There is a problem in the wiring. STOP.
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Table 44
Diagnostic Codes Table Description 41-3 8 Volt DC Supply voltage above normal 41-4 8 Volt DC Supply voltage below normal 100-10 Engine Oil Pressure Sensor abnormal rate of change Conditions which Generate this Code The digital sensor supply voltage is above normal for two seconds. The digital sensor supply voltage is below normal for two seconds. The Electronic Control Module (ECM) detects a value for the oil pressure that is between 530 kPa (77 psi) and 662 kPa (96 psi). The pressure changes less than 2.2 kPa (0.3 psi) in 30 seconds. The ECM detects a value for the unltered oil pressure that is between 530 kPa (77 psi) and 662 kPa (96 psi). The pressure changes less than 2.2 kPa (0.3 psi) in 30 seconds. The ECM detects a value for the intake manifold pressure that is between 410 kPa (59 psi) and 520 kPa (75 psi). The pressure changes less than 1.68 kPa (0.2 psi) in 30 seconds. The engine speed must be greater than 1000 rpm in order for this code to be set. The analog sensor supply voltage is above normal for one second. The analog sensor supply voltage is below normal for one second. System Response The code is logged. All sensors are set to default values. The code is logged. All sensors are set to default values. The code is logged. The value of the parameter will be set to 600 kPa (87 psi).
542-10 Engine Oil Pressure Sensor - Before Oil Filter abnormal rate of change
The code is logged. The value of the parameter will be set to 600 kPa (87 psi).
The code is logged. The value of the parameter will be set to 320 kPa (46 psi).
2131-3 5 Volt Sensor DC Power Supply #2 voltage above normal 2131-4 5 Volt Sensor DC Power Supply #2 voltage below normal
The code is logged. The code is logged. If the circuit for the power supply is shorted to ground, the power supply will be turned off. The ECM will periodically attempt to power the circuit until the circuit is repaired. The code is logged. The value of the parameter will be set to 320 kPa (46 psi).
The ECM detects a value for the intake manifold pressure that is between 410 kPa (59 psi) and 520 kPa (75 psi). The pressure changes less than 1.68 kPa (0.2 psi) in 30 seconds. The engine speed must be greater than 1000 rpm in order for this code to be set.
System Operation The ECM supplies a regulated voltage of 5.0 0.2 VDC to the following sensors:
Fuel rail pressure sensor Left intake manifold pressure sensor Right intake manifold pressure sensor Turbocharger 1 compressor inlet pressure sensor Turbocharger 2 compressor inlet pressure sensor Turbocharger 3 compressor inlet pressure sensor Turbocharger 4 compressor inlet pressure sensor Unltered fuel pressure sensor Unltered oil pressure sensor
Atmospheric pressure sensor Crankcase pressure sensor Engine coolant pump outlet pressure sensor Filtered oil pressure sensor Filtered fuel pressure sensor Fuel transfer pump inlet pressure sensor
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The ECM supplies a regulated voltage of 8.0 0.4 VDC to the following sensors:
Right turbocharger turbine inlet temperature sensor Left turbocharger turbine inlet temperature sensor
The supply voltage for the sensors is routed from the ECM to terminal 1 of each sensor connector. The sensor return for the sensors is routed from the ECM to terminal 2 of each sensor connector. The ECM provides short circuit protection for the internal power supply. A short circuit to the battery will not damage the internal power supply. -10 Codes This code indicates that the 5 volt supply is missing from the harness connector for the suspect pressure sensor. The engine must be running in order for this code to become active. During normal engine operation, the actual system pressures will uctuate slightly. When the 5 volt supply is missing from the suspect pressure sensor, the signal from the pressure sensor goes to a midrange value. This signal will not uctuate. If the signal from the pressure sensor remains abnormally steady for more than 30 seconds, the ECM activates this code. A snapshot is triggered. The ECM sets the value of the suspect sensor to the sensors default value. Refer to Table 44 for the default values that are for the particular sensor. Note: The sensors are not protected from overvoltage. A short from the supply line to the +Battery may damage the sensors. If the diagnostic code 41-3 or the diagnostic code 2131-3 is logged, it is possible that all of the sensors on the circuit have been damaged. Repair the circuit for the sensor supply. As a precaution, replace the sensors that may have been damaged.
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Illustration 161 Schematic of the PWM sensors for the sensor signal circuit
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Illustration 163
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Location of the connectors that are for the sensor signal circuit for the 20 cylinder engines (left side engine view) Illustration 162
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Location of the connectors that are for the sensor signal circuit for the 16 cylinder engines (left side engine view) (1) (2) (3) (4) J2/P2 ECM connector Right rail connector Left rail connector J1/P1 ECM connector
J2/P2 ECM connector Right rail connector Left rail connector J1/P1 ECM connector
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Illustration 164
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Location of the connectors that are for the sensor signal circuit (left rear engine view) (5) Machine interface connector
B. Thoroughly inspect connectors (1), (2), (3), (4), and (5). Inspect all of the connectors that are associated with the circuit. Refer to Troubleshooting, Electrical Connectors Inspect for details.
Illustration 165
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Terminal locations at the P1 ECM connector for the analog supply and the digital supply (P1-18) Digital return
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Illustration 167
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Terminal locations at the left rail connector for the analog supply and the digital supply (Terminal (Terminal (Terminal (Terminal (Terminal (Terminal 20) 28) 31) 32) 37) 40) Analog return Digital supply Digital supply Analog sensor supply Analog return Analog sensor supply
Illustration 166
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Terminal locations at the P2 ECM connector for the analog supply and the digital supply (P2-17) (P2-29) (P2-30) (P2-72) (P2-80) (P2-81) (P2-82) (P2-92) Analog return 8 V digital supply Analog return Analog sensor supply Analog sensor supply Analog sensor supply Analog sensor supply Digital return
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Illustration 168
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Terminal locations at the right rail connector for the analog supply and the digital supply (Terminal (Terminal (Terminal (Terminal (Terminal 6) Digital return 16) Analog sensor supply 27) Analog return 50) Analog sensor supply 67) Digital supply
Illustration 169
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Terminal locations for the analog sensors at the machine interface connector (16 and 20 cylinder engines) (Terminal (Terminal (Terminal (Terminal 7) Analog sensor supply 15) Digital return 32) Analog return 33) Digital Supply
Illustration 170 Sensor connector (Terminal 1) Sensor supply (Terminal 2) Sensor return (Terminal 3) Signal
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C. Perform a 45 N (10 lb) pull test on each of the wires in the ECM connectors that are associated with the circuit.
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D. Check the allen head screw for each of the ECM connectors for the proper torque. Refer to Troubleshooting, Electrical Connectors - Inspect for details. E. Check the harness and wiring for abrasion and for pinch points from the sensors back to the ECM. Expected Result: All connectors, pins and sockets are completely coupled and/or inserted and the harness and wiring are free of corrosion, of abrasion and of pinch points. Results:
D. Remove the electrical power from the ECM. Expected Result: No diagnostic codes are active or logged. Results:
or 41-4 diagnostic code is active or logged at this time. There is an electrical problem with the digital sensor supply. Proceed to Test Step 6. One of the -10 diagnostic codes is logged at this time. The analog supply is not reaching the sensor. Proceed to Test Step 3. 2131-3 or 2131-4 diagnostic code is active or logged at this time. There is an electrical problem with the analog sensor supply. Proceed to Test Step 4.
Test Step 2. Check for Diagnostic Codes that are Active or Logged
A. Connect Caterpillar Electronic Technician (ET) to the service tool connector. B. Restore electrical power to the ECM. C. Monitor the active diagnostic code screen on Cat ET. Check and record any diagnostic codes that are active or logged. Look for the following diagnostic codes:
Filtered oil pressure sensor Unltered oil pressure sensor Left intake manifold pressure sensor Right intake manifold pressure sensor
B. Restore the electrical power to the ECM. Note: Be sure to wiggle the harness during the following measurements in order to reveal an intermittent condition. C. Measure the voltage between terminals 1 and 2 at the appropriate sensor connector. D. Remove the electrical power from the ECM. E. Connect all of the sensors. Expected Result: Each voltage measurement is 5.0 0.2 VDC.
41-3 41-4
100-10
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Results:
Turbocharger 2 compressor inlet pressure Turbocharger 3 compressor inlet pressure Turbocharger 4 compressor inlet pressure Unltered fuel pressure sensor Unltered oil pressure sensor
C. Remove the electrical power from the ECM. Restore the wiring to the original conguration. Expected Result: The diagnostic code deactivates when a particular sensor is disconnected. Results:
Not OK At least one voltage measurement is not Test Step 4. Disconnect the Analog Sensors While You Check for Active Diagnostic Codes
A. Restore the electrical power to the ECM. B. Monitor the active diagnostic code screen on Cat ET while you disconnect each 5 Volt sensor at the sensor connector. Check for an active 2131-3 code or an active 2131-4 code. Note: Wait at least 30 seconds in order for the diagnostic codes to become active.
5.0 0.2 VDC. There is a problem with the harness wiring or with the ECM. Proceed to Test Step 5.
code deactivates when a particular sensor is disconnected. Repair: Connect the suspect sensor. If the code returns, replace the sensor. Connect all of the connectors. Verify that the problem is resolved. STOP.
code remains active after all of the sensors are disconnected. The sensors are not the cause of the diagnostic code. Leave the sensors disconnected. Proceed to Test Step 5.
Atmospheric pressure sensor Crankcase pressure sensor Engine coolant pump outlet pressure sensor Filtered oil pressure sensor Filtered fuel pressure sensor Pressure sensor at the inlet of the fuel
transfer pump
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P2-80 (analog sensor supply) P2-81 (analog sensor supply) P2-82 (analog sensor supply)
Install a jumper wire into each of these terminal locations. D. Connect the J2/P2 ECM connector. Note: Ensure that the loose ends of the jumper wires do not contact any ground source. E. Restore electrical power to the engine ECM. F. Measure the voltage between the jumper wire in the following terminal locations and the jumper wire that is in terminal location P2-17 (analog return):
If the problem is resolved with the test ECM, install the suspect ECM. If the problem returns with the suspect ECM, replace the ECM. Verify that the problem is resolved. If the problem is not resolved with the test ECM, install the original ECM. There is a problem in the wiring. STOP.
Test Step 6. Disconnect the Digital Sensors while you Check for Active Diagnostic Codes
A. Restore the electrical power to the ECM. B. Monitor the active diagnostic code screen on Cat ET while you disconnect each of the digital sensors at the sensor connector. Check for an active 41-3 code or an active 41-4 code. Note: Wait at least 30 seconds in order for the diagnostic codes to become active. a. Disconnect the following sensors one at a time:
P2-72 (analog sensor supply) P2-80 (analog sensor supply) P2-81 (analog sensor supply) P2-82 (analog sensor supply)
G. Remove electrical power from the ECM. Restore the wiring to the original conguration. Expected Result: The voltage measurement is 5.0 0.2 VDC. Results:
remains active after the sensors are disconnected. Leave the sensors disconnected. The sensors are not the cause of the diagnostic code. Proceed to Test Step 7.
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B. Fabricate two jumper wires that are long enough to be used to measure the supply voltage at the ECM connectors. Crimp connector sockets to one end of each jumper wire. C. Remove the wires from terminal locations P2-29 (digital sensor supply) and P2-92 (digital return). Install a jumper wire into each of these terminal locations. D. Connect the J2/P2 ECM connector. E. Restore electrical power to the engine ECM. F. Measure the voltage between the jumper wire in P2-29 (digital sensor supply) and P2-92 (sensor return). G. Remove electrical power from the ECM. Restore the wiring to the original conguration. Expected Result: The voltage measurement is 8.0 0.4 VDC. Results:
i02906031
Shutdown - Test
SMCS Code: 1900-038; 7332-038 System Operation Description: Use this procedure in order to troubleshoot a problem with the circuit for the ground level shutdown switch or use this procedure if the following diagnostic code is active.
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Table 45
Diagnostic Code Description 267-2 Remote Shutdown Input erratic, intermittent, or incorrect Conditions which Generate this Code The two inputs for the ground level shutdown switch are in the same state. System Response The code is active and the code is logged.
The ground level shutdown switch provides the ability to shut down the engine. The engines Electronic Control Module (ECM) remains powered. Caterpillar Electronic Technician (ET) can be used to communicate with the ECM. The ground level shutdown switch must be returned to the RUN position and the keyswitch must be cycled to the OFF position before the ECM will allow the engine to start. To shut down the engine, toggle the ground level shutdown switch to the SHUTDOWN position. The ECM reads the position of the ground level shutdown switch. If the engine is running, the ECM disables the fuel injection. If the engine is not running, the ECM will not allow the engine to start.
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Illustration 172
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Location of the connectors at the ECM that are for the 16 cylinder engines (typical left front engine view) (1) Right rail connector (2) J1/P1 ECM connector
Illustration 174 P1 ECM connector (P1-18) Digital return (P1-23) Ground level shutdown (NO) (P1-40) Ground level shutdown (NC)
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Illustration 173
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Location of the connectors at the ECM that are for the 20 cylinder engines (typical front side engine view) (1) Right rail connector (2) J1/P1 ECM connector
B. Thoroughly inspect connectors (1) and (2). Thoroughly inspect the connectors for the ground level shutdown switch. Refer to Troubleshooting, Electrical Connectors - Inspect for details.
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Expected Result: All connectors, pins, and sockets are completely coupled and/or inserted. The harness and wiring are free of corrosion, of abrasion, and of pinch points. Results:
STOP.
Terminal locations at the right rail connector for the ground level shutdown (Terminal 6) Digital return (Terminal 19) Ground level shutdown (NO) (Terminal 20) Ground level shutdown (NC)
Test Step 2. Check the Status of the Ground Level Shutdown Switch on Cat ET
A. Connect Cat ET to the service tool connector. Start Cat ET. B. Turn the keyswitch to the ON position. C. Operate the ground level shutdown switch. Observe the status for the Shutdown Switch on Cat ET. Expected Result: The status of the Shutdown Switch reads ON with the ground level shutdown switch in the SHUTDOWN position. The status of the Shutdown Switch reads OFF when the ground level shutdown switch is in the RUN position. Results:
Illustration 176
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Terminal locations at the harness connector for the ground level shutdown (Terminal A) Ground level shutdown (NC) (Terminal B) Digital return (Terminal C) Ground level shutdown (NO)
C. Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the circuit. D. Check the ECM connector (allen head screw) for the proper torque. Refer to Troubleshooting, Electrical Connectors - Inspect for details. E. Check the harness and the wiring for abrasion and for pinch points.
ON with the ground level shutdown switch in the SHUTDOWN position. The status of the Shutdown Switch reads OFF when the ground level shutdown switch is in the RUN position. The ground level shutdown switch is operating normally. Repair: There may be an intermittent problem. If the problem is intermittent, refer to Troubleshooting, Electrical Connectors - Inspect. STOP.
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does not read ON with the ground level shutdown switch in the SHUTDOWN position. The status of the Shutdown Switch does not read OFF when the ground level shutdown switch is in the RUN position. The ground level shutdown switch is not operating normally. Proceed to Test Step 3.
Repair: The problem is not with the harness or the ECM. Temporarily connect a new ground level shutdown switch. Verify that the new ground level shutdown switch solves the problem before you permanently install the new ground level shutdown switch. STOP.
Test Step 3. Short the Wires together at the Ground Level Shutdown Switch
A. Turn the keyswitch to the OFF position. B. Record the position of the wiring on the ground level shutdown switch before removing the wires. C. Disconnect the wires from the ground level shutdown switch. D. Create a short circuit at the connector for the ground level shutdown switch between terminal A (ground level shutdown (NC)) and the terminal B (digital return). E. Turn the keyswitch to the ON position. F. Observe the status of the Shutdown Switch on Cat ET. G. Remove the short circuit at the connector for the switch. H. Create a short circuit at the connector for the ground level shutdown switch between terminal C (ground level shutdown (NO)) and the terminal B (digital return). I. Observe the status of the Shutdown Switch on Cat ET. J. Turn the keyswitch to the OFF position. K. Remove the wire short. Expected Result: The status of the Shutdown Switch reads OFF when the short circuit is placed between terminals A and B. The status of Shutdown Switch reads ON when the short circuit is placed between terminals C and B. Results:
Test Step 4. Short the Ground Level Shutdown Switch at the ECM
A. Use a wire removal tool to remove the wires from terminal locations P1-18, P1-23, and P1-40 at the ECM connector. B. Fabricate a jumper wire that is long enough to create a test circuit across the ECM connector. Crimp connector sockets to each end of the jumper wire. C. Use the wire jumper to create a short circuit between terminal locations P1-18 and P1-40 at the ECM connector. D. Turn the keyswitch to the ON position. Note: The digital return will no longer be connected to the other sensors and switches. Additional diagnostic codes will be generated from the ECM. Clear the codes after you complete this test. E. Observe the status of the Shutdown Switch on Cat ET. F. Turn the keyswitch to the OFF position. G. Use a wire removal tool to remove the jumper wire. H. Use the wire jumper to create a short circuit between terminal locations P1-18 and P1-23 at the ECM connector. I. Turn the keyswitch to the ON position. J. Observe the status of the ground level shutdown switch on Cat ET. K. Turn the keyswitch to the OFF position. Restore the wiring to the original conguration. Expected Result: The status reads OFF when the jumper wire is between terminal locations P1-18 and P1-40. The status reads ON when the jumper wire is between terminal locations P1-18 and P1-23.
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Results:
Speed/Timing - Test
SMCS Code: 1912-038 System Operation Description: Use this procedure to troubleshoot the electrical system if a problem is suspected with the engine speed/timing sensor or if the diagnostic code in Table 46 is active.
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Table 46
Diagnostic Codes Table Description 190-8 Engine Speed sensor abnormal frequency, pulse width, or period Conditions which Generate this Code The engine is running for more than three seconds. The pattern from the timing ring is lost for two seconds. The engine is running for more than three seconds. The ECM detects an abnormal signal frequency. System Response The engine speed from this sensor is ignored. The code is active. The code is logged if the pattern from the timing ring returns for ve seconds. The code is latched in the active state until the power to the Electronic Control Module (ECM) is cycled. The offset for the timing calibration is set to zero while the diagnostic code is active. The sensor is ignored. The engine speed is calculated by using only the signal from the primary speed/timing sensor. The code is latched in the active state until the power to the ECM is cycled. The offset for timing calibration is set to zero while the diagnostic code is active.
342-8 Secondary Engine Speed sensor abnormal frequency, pulse width, or period
The engine is in run mode for more than ve seconds. The condition is checked once after each start-up cycle. The position of the primary speed/timing sensor in relation to the position of the secondary speed/timing sensor may be out of specications. The polarity of the sensors wiring may be reversed. The engine is in run mode for more than three seconds. The ECM detects an abnormal signal frequency. The engine is in run mode for more than ve seconds. The condition is checked once after each start-up cycle. The position of the primary speed/timing sensor in relation to the position of the secondary speed/timing sensor may be out of specications. The polarity of the sensors wiring may be reversed.
2710-8 Engine Tertiary Speed Sensor abnormal frequency, pulse width, or period 2710-11 Engine Tertiary Speed Sensor other failure mode
The sensor is ignored. The engine speed is calculated by using only the signal from the primary speed/timing sensor. The code is latched in the active state until the power to the ECM is cycled.
This engine is equipped with three engine speed/timing sensors. The primary engine speed/timing sensor for the crankshaft is mounted inside the engine crankcase and toward the left rear section of the engine. This sensor utilizes the teeth for the rear gear groups crankshaft gear in order to sense the engine speed and the crankshaft position. There are two camshaft speed/timing sensors that are located on the top rear portion of the engine. Both of these sensors utilize the teeth for the rear gear groups camshaft gear in order to sense the engine speed and the camshaft position. A single tooth for both of these gears has been partially removed in order to provide a timing reference for the ECM.
Under normal operation, the ECM utilizes the signal from the crankshafts engine speed/timing sensor in order to determine the crankshaft position for an accurate fuel delivery and timing. This eliminates the need for a separate procedure for timing calibration. A timing offset is determined during each engine start-up. The value of the timing offset is stored in the electronic control modules non-volatile memory until the next engine start-up. If a failure mode for the crankshafts engine speed/timing sensor is detected during engine start-up, the value of the timing offset that has been stored in memory will be used. This value will continue to be used for the engines timing calibration until the diagnostic is resolved. A timing calibration cannot be performed manually on this engine.
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The fuel delivery to the engine is synchronized by the signal from the camshaft speed/timing sensor (RH). If a failure mode for the crankshafts engine speed/timing sensor is detected, the ECM will use the signal that is from the camshaft sensor (RH) for the fuel delivery and the engine timing. In this application, the camshaft speed/timing sensor (LH) is provided as a backup for the camshaft speed/timing sensor (RH). If a failure mode for the camshaft speed/timing sensor (RH) is detected, the ECM will use the other camshaft sensor to provide the functionality of the failed sensor. The engine will start when the signal from a single camshaft speed/timing sensor is present. If the engine is started and the ECM loses both of the signals that are from the camshaft speed/timing sensors, the ECM will use the signal from the crankshaft speed/timing sensor in order to keep the engine running. If the signal from both of the camshaft speed/timing sensors is lost, the engine will not start. The engine speed/timing sensors are not interchangeable. Do not attempt to switch the positions of the sensors. Complete all of the following tasks when you are installing the speed/timing sensors:
Ensure that an O-ring is installed on each sensor. If an O-ring is damaged or missing, replace the
O-ring.
Ensure that each electrical connector is securely Ensure that the harness is properly secured, and
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g01439689
Note: These diagnostic codes will not become active until engine speed is above 600 rpm. If the engine will not start, check for logged diagnostic codes that are related to the engine speed/timing sensors. Expected Result: None of the diagnostic codes that are listed above are active or logged. Results:
There is a 190-08, 342-08, or 2710-08 that is active or logged. Proceed to Test Step 2. 342-11 or 2710-11 diagnostic code that is active or logged.
Repair: The position of the crankshaft with respect to the camshaft is not within specications.
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This may be caused by a problem with the rear gear train. Check the gears that are in the rear gear train for damage and for excessive wear. Check that the gears that are in the gear train are properly timed. Repair any mechanical damage to the engine. Verify that the repair eliminates the original problem. This may also be caused by the improper wiring of one or both of the engine speed timing sensors. Check that the wiring at the ECM and the wiring at each of the sensors is correct. STOP.
rpm for at least one engine speed/timing sensor while the engine is cranked. Proceed to Test Step 3.
Illustration 179 Engine speed/timing sensors (4) (5) (6) (7) (8) Bracket Secondary speed/timing sensor O-ring seals Bracket Primary speed/timing sensor
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D. Ensure that O-ring seals (6) are installed on sensors (5) and (8). Ensure that the O-ring seals are free of damage. Expected Result: All of the O-ring seals are properly installed and free of damage. The bracket is free of damage. Results:
B. Visually inspect the sensors without removing the sensor assembly from the engine. Flange (1) must be ush against mounting surface (2) in order to ensure proper operation. Inspect bracket (3). Verify that the bracket securely holds the ange of the sensor ush against the mounting surface. Verify that the bracket is not bent. If the bracket is bent or if an obstruction is preventing the sensor assembly from being installed correctly, the engine will not start. Note: The bracket cannot be replaced separately.
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3. Tighten the bolt for brackets (4) and (7). 4. Connect the connector and verify that the locking tab of the connector is securely latched at the sensor. 5. Ensure that the harness is properly secured, and that the tie-wraps are placed in the correct location. Proceed to Test Step 3.
Location of the connectors at the ECM that are for the 16 cylinder engines (typical left front engine view) (9) J2/P2 ECM connector (10) Right rail connector (11) Left rail connector
Illustration 181
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Location of the connectors at the ECM that are for the 20 cylinder engines (typical front side engine view) (9) J2/P2 ECM connector (10) Right rail connector (11) Left rail connector
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Illustration 182
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Location of the crankshaft speed/timing sensor (left side engine view) (12) Primary crankshaft speed/timing sensor
Illustration 184
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Terminal locations at the P2 ECM connector for the engine speed/timing sensors (P2-25) Primary crankshaft engine speed/timing signal (+) (P2-26) Secondary camshaft engine speed/timing signal (LH) (+) (P2-35) Primary crankshaft engine speed/timing signal () (P2-36) Secondary camshaft engine speed/timing signal (LH) () (P2-46) Primary camshaft engine speed/timing signal (RH) (+) (P2-47) Primary camshaft engine speed/timing signal (RH) ()
Illustration 183
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Location of the camshaft speed/timing sensors (top side engine view) (13) Secondary camshaft speed/timing sensor (RH) (14) Secondary camshaft speed/timing sensor (LH)
B. Thoroughly inspect connectors (9), (10), (11), (12), (13), and (14). Refer to Troubleshooting, Electrical Connectors - Inspect for details.
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Illustration 185
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Illustration 186
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Terminal locations at the left rail connector for the engine speed/timing sensors (Terminal 24) Secondary camshaft engine speed/timing signal (LH) () (Terminal 25) Secondary camshaft engine speed/timing signal (LH) (+) (Terminal 26) Primary crankshaft engine speed/timing signal (+) (Terminal 27) Primary crankshaft engine speed/timing signal ()
Terminal locations at the right rail connector for the engine speed/timing sensors (Terminal 62) Primary camshaft engine speed/timing signal (RH) ( ) (Terminal 63) Primary camshaft engine speed/timing signal (RH) (+)
Illustration 187 Harness connector for the engine speed/timing sensors (Terminal 1) Speed/timing sensor () (Terminal 2) Speed/timing sensor (+)
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C. Perform a 45 N (10 lb) pull test on each of the wires that are associated with the circuit for the engine speed/timing sensors. D. Check the allen head screw for each ECM connector for the proper torque. Refer to Troubleshooting, Electrical Connectors - Inspect for the correct torque values. E. Check the harness and wiring for abrasion and for pinch points from the engine speed/timing sensors to the ECM.
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Expected Result: All connectors, pins, and sockets are completely coupled and/or inserted. The harness and wiring are free of corrosion, of abrasion, and of pinch points. Results:
Results:
Test Step 4. Measure the Sensor Resistance through the Engine Harness
A. Turn the keyswitch to the OFF position. B. Disconnect the P2 connector. C. Perform the following procedure in order to measure the resistance of the primary engine speed/timing sensor: a. Measure the resistance from P2-25 (primary (crankshaft) engine speed/timing +) to P2-35 (primary (crankshaft) engine speed/timing ). Resistance ........................... 110 to 200 Ohms D. Perform the following procedure in order to measure the resistance of each of the secondary engine speed/timing sensors: a. Measure the resistance from P2-46 (primary (camshaft (RH)) engine speed/timing +) to P2-47 (primary (camshaft (RH)) engine speed/timing ). Resistance ....................... 1000 to 1200 Ohms b. Measure the resistance from P2-26 (secondary (camshaft (LH)) engine speed/timing +) to P2-36 (secondary (camshaft (LH)) engine speed/timing ). Resistance ....................... 1000 to 1200 Ohms Expected Result: The resistance measurements are within the specications.
specications. The sensor resistance is not within the acceptable range when the sensor resistance is measured through the engine harness. Proceed to Test Step 5.
Test Step 5. Measure the Resistance of the Sensor at the Sensor Connector
A. Disconnect the engine harness from the suspect sensor. B. For the primary engine speed/timing sensor, measure the resistance between terminal 2 (primary (crankshaft) engine speed/timing +) and terminal 1 (primary (crankshaft) engine speed/timing ). Resistance ................................ 110 to 200 Ohms C. For the secondary engine speed/timing sensor, measure the resistance between terminal 2 (primary (camshaft (RH)) engine speed/timing +) to terminal 1 (primary (camshaft (RH)) engine speed/timing ). Resistance ............................ 1000 to 1200 Ohms D. For the secondary engine speed/timing sensor, measure the resistance between Terminal 2 (secondary (camshaft (LH)) engine speed/timing +) to Terminal 1 (secondary (camshaft (LH)) engine speed/timing ). Resistance ............................ 1000 to 1200 Ohms
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Expected Result: The resistance measurement for the suspect sensor is within the specication. Results:
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Service
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Factory Passwords
SMCS Code: 0785; 1900 NOTICE Operating the engine with a ash le not designed for that engine will damage the engine. Be sure the ash le is correct for your engine. Note: Factory passwords are provided only to Caterpillar dealers. Factory passwords are required to perform each of the following functions:
Probable Causes
One of the following items may not be recorded correctly on the Caterpillar Electronic Technician (ET):
Recommended Actions
1. Verify that the correct passwords were entered. Check every character in each password. Remove the electrical power from the engine for 30 seconds and then retry. 2. Verify that Cat ET is displaying the Enter Factory Passwords dialog box. 3. Use Cat ET to verify that the following information has been entered correctly:
Unlock parameters.
Factory passwords are required in order to unlock certain system conguration parameters. Refer to Troubleshooting, Conguration Parameters.
Engine serial number Serial number for the electronic control module Serial number for Cat ET Total tattletale Reason code
For additional information, refer to Troubleshooting, Factory Passwords.
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i02887774
Expected Result: Both indicators on the communication adapter are not ashing. Results:
serviced on two both links. Proceed to Test Step 2. rmware in the communication adapter does not support communication on both data links. Proceed to Test Step 3.
hardware is not responding message. Proceed to Test Step 3. ET cannot nd an exact match for the software version in the ECM. Repair: Update Cat ET to the latest available version. STOP.
Incorrect communication adapter Use of a wireless communications adapter Use of a parallel cable between the communication
adapter and the PC
Incorrect version of Cat ET Incorrect rmware in the communication adapter Incorrect conguration of Cat ET A problem with electrical power to the
communication adapter
Test Step 2. Verify that the Correct Communication Adapter is being Used
A 171-4401 Communication Adapter As or a 275-5121 Communication Adapter As must be used to communicate. The following communication adapters cannot be used because the communication adapters do not communicate over both data links:
A problem with electrical power to the engine ECM A problem with the wiring for a data link A problem with the electrical cables between the
PC and the vehicle
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Repair: Obtain the correct communication adapter. Refer to Troubleshooting, Electronic Service Tools, if necessary. Establish communication on both data links. Continue with this procedure if the communication adapter does not communicate on both data links.
However, the Power indicator is not illuminated. Proceed to Test Step 5. The Power indicator is illuminated. Proceed to Test Step 4.
A correct communication adapter is being used. Test Step 3. Check the Version of the Firmware for the Communication Adapter
Note: The version of the rmware for the communication adapter must be 3.0.0 or higher. A. Electronically disconnect Cat ET. Verify that the power indicator on the communication adapter is illuminated. B. Select the Utilities drop-down menu. C. Select Comm Adapter II Toolkit from the menu. D. When the dialog box for the tool kit appears select the Utilities drop-down menu. E. Select Application Firmware Flash from the menu. F. Select the latest .apf le from the list. G. Click OK. Then, click Begin Flash. H. When the le is loaded, the Flash Completed Successfully message will appear. I. Click Toolkit. Verify that the Application Firmware Version (Serial IP) is 3.0.0 or higher. J. Attempt to connect Cat ET. Expected Result: Cat ET communicates on both data links. Results:
both data links. The POWER indicator is not illuminated. Proceed to Test Step 5. data links. The POWER indicator is illuminated. Proceed to Test Step 6.
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Illustration 188 Power terminals at the service tool connector (Terminal A) +Battery (Terminal B) Battery
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Check for battery voltage at the service tool connector. Refer to Illustration 188. Expected Result: Battery voltage is present at the service tool connector. Results:
Terminal locations at the J1/P1 ECM connectors for the ECM power supply circuit (typical wiring) (48) (52) (53) (55) (57) (61) (63) (65) (67) (69) (70) Unswitched Unswitched Unswitched Unswitched Unswitched Battery Battery Battery Battery Battery Keyswitch +Battery +Battery +Battery +Battery +Battery
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Illustration 190 Schematic for the ECM power supply circuit (typical wiring diagram)
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B. Refer to Illustrations 189 and 190. Verify that battery voltage is present at the terminals that are indicated in the Illustration. Be sure to connect the voltmeter between the +Battery terminals and the Battery terminals at the ECM connector. C. Verify that battery voltage is present at P1-70 when the keyswitch is turned on. Expected Result: Battery voltage is present at all of the P1 terminals that are associated with the ECM power supply circuit. Results:
appropriate P1 terminals. The circuits for the battery power to the ECM are OK. Proceed to the Test Step 7. battery connection.
when the bypass harness is used. There is a problem with the applications wiring for one of the data links. Repair: Repair the data link. Refer to Troubleshooting, Data Link - Test. STOP.
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i02608713
Note: Some applications use injectors that have trim codes or injector trim les that are associated with the injectors. If injector trim codes are necessary, the injector trim codes are printed on the injector. If injector trim les are necessary, the injector serial numbers are necessary for obtaining the correct injector trim les from Cat ET. The injector trim le is a number that is specic to each unit injector. The ECM uses this number to compensate for manufacturing variations between individual injectors. If you replace any of the unit injectors, you must program the injector trim les for the new injectors. Also, if you replace the ECM, you must program all of the injector trim les into the new ECM. 3. Disconnect the suspect ECM. Temporarily connect the new ECM to the engine. Do not mount the new ECM on the engine. Note: The Test ECM Mode must be activated before the engine serial number is programmed into the new ECM. Test ECM Mode can only be activated if the engine serial number has not already been programmed during normal operation of the ECM. If the engine serial number is programmed and the new ECM is not in Test ECM Mode, the new ECM can never be used as a test ECM. 4. Start the Test ECM Mode on Cat ET. Access the feature through the Service menu. Cat ET will display the status of the Test ECM Mode and the hours that are remaining for the Test ECM Mode. 5. Program the correct ash le into the new ECM. Note: If the Copy Conguration/ECM Replacement feature cannot be used, program the values from the Parameters Worksheet. 6. Use the Copy Conguration/ECM Replacement feature on Cat ET to program the correct parameters into the new ECM. 7. Program the engine serial number into the new ECM. If the problem is resolved with the new ECM, remove the original ECM and permanently install the new ECM. If the new ECM does not x the problem, the original ECM is not the problem. Remove the new ECM before the 24 hour timer expires. Reconnect the original ECM.
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7. Select the appropriate cylinder. 8. Click on the Change button. 9. Select the appropriate injector trim le from the PC. 10. Click on the Open button. 11. If you are prompted by Cat ET, enter the injector conrmation code into the eld. 12. Click on the OK button. The injector trim le is loaded into the ECM. 13. Repeat the procedure for each cylinder, as required. If the download of the injector trim le fails, conrm that the part number for the injector is correct. Repeat the previous test steps.
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An injector is replaced. The ECM is replaced. Injector Trim is displayed below a 268-2
diagnostic code on Cat ET.
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Table 47
Diagnostic Codes Table Code and Description 253-2 Personality Module erratic, intermittent, or incorrect Conditions which Generate this Code The ash le is for a different engine family or for a different engine application. System Response The engine will not start. Clearing this diagnostic code requires factory passwords. The personality module code must be reset to zero. Procedure Program the correct ash le.
Flash Programming This is a method of programming or updating the ash le in an engines Electronic Control Module (ECM). Caterpillar Electronic Technician (ET) is used to ash program a le into the memory of the engines ECM. If you do not have the ash le, use the Flash File Search tool on the Service Technician Workbench (STW) to obtain the ash le for your engine. Alternatively, use the Service Software Files feature on SIS Web to obtain the ash le for your engine. You must have the engine serial number in order to search for the ash le. After locating the correct ash le, download the ash le to your PC. Write down the name of the ash le for future reference.
f. Cat ET will indicate when ash programming has been successfully completed. 4. Start the engine and check for proper operation. Repair any active diagnostic or event codes.
ECM - Congure
SMCS Code: 1901-025 Select Conguration from the Service menu. If the default function keys are set, push the F5 key. If the default is set, press the Conguration Tool icon on the toolbar. The display for the conguration has four columns: Description The Description column gives the name of the parameter. Value The Value column displays the status of the current parameter. Unit The Unit column displays the units of the congurable parameter. TT The TT column displays the list of total tattletales. The tattletale value represents the number of changes that have been made to the congurable parameter. Note: The value of Total Tattletales is not supported for some products.
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ECM - Replace
SMCS Code: 1901-510 NOTICE Care must be taken to ensure that uids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the uid with suitable containers before opening any compartment or disassembling any component containing uids. Refer to Special Publication, NENG2500, Caterpillar Dealer Service Tool Catalog for tools and supplies suitable to collect and contain uids on Caterpillar products. Dispose of all uids according to local regulations and mandates. NOTICE Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life. The Electronic Control Module (ECM) contains no moving parts. Replacement of the ECM can be costly. Replacement can also be a time consuming task. Follow the troubleshooting procedures in this manual in order to ensure that replacing the ECM will correct the problem. Use these procedures to ensure that the ECM is the cause of the problem. Note: Ensure that the ECM is receiving power and that the ECM is properly wired to the negative battery circuit before you attempt to replace the ECM. Refer to Troubleshooting, Electrical Power Supply - Test. Some application software supports the use of a new ECM as a test ECM. A new ECM can be temporarily placed into a Test ECM Mode. This ECM can then be used to replace a suspect ECM in order to determine if the suspect ECM is faulty. Refer to Troubleshooting, Test ECM Mode. NOTICE If the ash le and engine application are not matched, engine damage may result. Perform the following procedure in order to replace the ECM:
1. Print the parameters from the Conguration screen on Caterpillar Electronic Technician (ET). If a printer is unavailable, record all of the parameters. Record any logged diagnostic codes and logged event codes for your records. Record the injector serial numbers from the Calibrations screen under the Service menu on Cat ET. Note: The injector serial numbers and the injector conrmation code are necessary for obtaining the correct injector trim les. The injector serial number and the injector conrmation code are located on the injector. The ECM uses the injector trim les in order to compensate for manufacturing variations between individual injectors. If you replace any of the unit injectors, you must reprogram the injector trim les for the new injectors. Also, if you replace the ECM, the injector trim les must be installed into the new ECM. A successful Copy Conguration process will accomplish this task. For more instruction, refer to Troubleshooting, Injector Trim File - Install. 2. Use the Copy Conguration/ECM Replacement feature that is found under the Service menu on Cat ET. Select Load from ECM in order to copy the conguration from the suspect ECM. Note: If the Copy Conguration process fails and the parameters were not obtained in Step 1, the parameters must be obtained elsewhere. Some parameters are stamped on the engine information plate, but most parameters must be obtained from the factory. 3. Remove the ECM from the engine. a. Remove the electrical power from the ECM. b. Disconnect the J1/P1 and J2/P2 ECM connectors. NOTICE Use a suitable container to catch any fuel that might spill. Clean up any spilled fuel immediately. NOTICE Do not allow dirt to enter the fuel system. Thoroughly clean the area around a fuel system component that will be disconnected. Fit a suitable cover over disconnected fuel system component. c. Remove the fuel lines (if equipped) from the ECM. d. Remove the mounting bolts from the ECM. e. Disconnect the ECM ground strap from the engine. 4. Install the replacement ECM.
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a. If the old mounting hardware is in good repair, you can use the old mounting hardware to install the replacement ECM. b. Reconnect the fuel lines (if equipped). c. Ensure that the ECM mounting hardware is installed correctly. The rubber grommets are used to protect the ECM from excessive vibration. The ECM must be able to drift in the rubber grommets. If the installation is equipped with fuel lines, the fuel lines must not put tension on the ECM. If the ECM cannot be moved slightly in the grommets, check that the fuel lines are not pulling the ECM against one side of the grommets. d. Connect the ECM ground strap. e. Connect the J1/P1 and J2/P2 ECM connectors. Tighten the allen head screw on each of the ECM connectors to the proper torque. Refer to Troubleshooting, Electrical Connectors Inspect for the correct torque value. 5. Install the ECM software. Refer to Troubleshooting, ECM Software - Install. 6. If the replacement ECM was used previously for a different application, obtain factory passwords in order to reset the interlock codes. 7. Congure the ECM. a. If the Load from ECM process from Step 2 was successful, return to the Copy Conguration/ECM Replacement screen on Cat ET and select Program ECM. After using the Program ECM feature, be sure to cycle the power to the ECM. Wait at least 15 seconds after turning the keyswitch to the OFF position. Note: Some control modules have a power off delay. The 15 seconds will be sufcient to cover this delay. b. If the Program ECM process was successful, proceed to Step 9. c. If the Program ECM process was unsuccessful, manually program the ECM parameters into the replacement ECM. The parameters must match the parameters from Step 1.
Note: If the Copy Conguration process fails and the parameters were not obtained in Step 1, the parameters must be obtained elsewhere. Some parameters are stamped on the engine information plate, but most parameters must be obtained from the factory. d. If necessary, program the engine monitoring system. 8. If necessary, install the injector trim les. Refer to Troubleshooting, Injector Trim File - Install. 9. Check for an active diagnostic code for timing calibration. If the diagnostic code is active, calibrate the injection timing. Refer to calibration procedures Troubleshooting, Timing - Calibrate. 10. Check for diagnostic codes and for event codes.
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Deutsch HD and DT connectors. Never solder the terminals onto the wires. Refer to SEHS9615, Servicing Deutsch HD and DT Style Connectors. in order to remove wedges from DT connectors. Never use a screwdriver to pry a wedge from a connector.
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probe or a test light. Never break the insulation of a wire in order to access to a circuit for measurements. the repair.
a. Inspect all wiring harnesses. Ensure that the routing of the wiring harness allows the wires to enter the face of each connector at a perpendicular angle. Otherwise, the wire will deform the seal bore. Refer to Illustration 191. This will create a path for the entrance of moisture. Verify that the seals for the wires are sealing correctly.
The connection of any electrical equipment and the disconnection of any electrical equipment may cause an explosion hazard which may result in injury or death. Do not connect any electrical equipment or disconnect any electrical equipment in an explosive atmosphere. 1. Determine If The Problem Is Intermittent. If the problem is intermittent, attempt to test the circuit before you disconnect any electrical connectors. This helps identify the root cause of intermittent problems. The Wiggle Test on the Caterpillar Electronic Technician (ET) may be able to test the circuit. Refer to the documentation that accompanies Cat ET. Perform the wiggle test on the circuit, when possible. Otherwise, continue with this procedure. 2. Check the Connectors for Moisture and For Corrosion.
Illustration 192 (1) Electronic Control Module (ECM) connector (2) Correctly inserted plug (3) Incorrectly inserted plug
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b. Ensure that the sealing plugs are in place. If any of the plugs are missing, replace the plug. Ensure that the plugs are inserted correctly into the connector. Refer to Illustration 192.
Illustration 193 Illustration 191 Leaky seal at the connector (typical example)
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Note: The ECM is a sealed unit. If moisture is found in an ECM connector, the ECM is not the source of the moisture. Do not replace the ECM. 3. Check the Wires for Damage to the Insulation. a. Carefully inspect each wire for signs of abrasion, of nicks, and of cuts. Inspect the wires for the following conditions:
Exposed insulation Rubbing of a wire against the engine Rubbing of a wire against a sharp point
b. Check all of the wiring harness fasteners in order to verify that the harness is properly secured. Also check all of the fasteners in order to verify that the harness is not compressed. Pull back the harness sleeves in order to check for a attened portion of wire. A fastener that has been overtightened attens the harness. This damages the wires that are inside the harness. 4. Inspect the Connector Terminals. Visually inspect each terminal in the connector. Verify that the terminals are not damaged. Verify that the terminals are properly aligned in the connector and verify that the terminals are properly located in the connector. 5. Perform a Pull Test on Each Wire Terminal Connection.
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c. Disconnect the suspect connector and inspect the connector seal. Ensure that the seals are in good condition. If necessary, replace the connector. d. Thoroughly inspect the connectors for evidence of moisture entry. Note: It is normal to see some minor seal abrasion on connector seals. Minor seal abrasion will not allow the entry of moisture. If moisture or corrosion is evident in the connector, the source of the moisture entry must be found and the source of the moisture entry must be repaired. If the source of the moisture entry is not repaired, the problem will recur. Simply drying the connector will not x the problem. Check the following items for the possible moisture entry path:
Missing seals Improperly installed seals Nicks in exposed insulation Improperly mated connectors
Moisture can also travel to a connector through the inside of a wire. If moisture is found in a connector, thoroughly check the connectors harness for damage. Also check other connectors that share the harness for moisture.
Illustration 195 Receptacle lock wedge (typical example)
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a. Ensure that the locking wedge for the connector is installed properly. Terminals cannot be retained inside the connector if the locking wedge is not installed properly.
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b. Perform the 45 N (10 lb) pull test on each wire. Each terminal and each connector should easily withstand 45 N (10 lb) of tension and each wire should remain in the connector body. This test checks whether the wire was properly crimped in the terminal and whether the terminal was properly inserted into the connector. 6. Check Individual Pin Retention into the Socket.
Illustration 197
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Allen head screw for the 120 pin ECM connector (typical example)
b. Torque the allen head bolt for the 120 pin ECM connector to 7.0 0.5 Nm (60 4 lb in).
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a. Verify that the sockets provide good retention for the pins. Insert a new pin into each socket one at a time in order to check for a good grip on the pin by the socket. 7. Check the Locking Mechanism of the Connectors.
Illustration 198
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a. Ensure that the connectors lock properly. After locking the connectors, ensure that the two halves cannot be pulled apart. b. Verify that the latch tab of the connector is properly latched. Also verify that the latch tab of the connector returns to the locked position. 8. Check the Allen Head Screws on the Connectors. Visually inspect the allen head screws for the ECM connectors. Ensure that the threads on each allen head screw are not damaged. a. Connect the ECM connectors.
Allen head screw for the 70 pin ECM connector (typical example)
c. Torque the allen head screw for the 70 pin ECM connector to 6.0 + 1.5 - 1.0 Nm (55 + 13 - 9 lb in).
Illustration 199
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Allen head screw for the 40 pin ECM connector (typical example)
d. Torque the allen head screw for the 40 pin ECM connector to 2.25 0.25 Nm (20 2 lb in). e. Connect the customer connector.
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Illustration 200
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Allen head screw for the 40 pin customer connector and the 70 pin customer connector (typical example)
f. Torque the allen head screw for the 40 pin customer connector and the 70 pin customer connector to 2.25 0.25 Nm (20 2 lb in).
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Index
A Alternator Problem (Charging Problem and/or Noisy Operation)............................................................ 39 Probable Causes ............................................... 39 Recommended Actions...................................... 39 C Circuit Tests ........................................................... 74 Component Location ............................................... 9 Block Diagram...................................................... 9 Conguration Parameters...................................... 20 Parameter Descriptions ..................................... 20 Parameter Worksheet ........................................ 21 Coolant Contains Fuel ........................................... 40 Probable Causes ............................................... 40 Recommended Actions...................................... 40 Coolant Contains Oil.............................................. 40 Probable Causes ............................................... 40 Recommended Actions...................................... 41 Coolant Level - Test............................................... 74 Coolant Pressure Is Low ....................................... 41 Probable Causes ............................................... 41 Recommended Actions...................................... 41 Coolant Temperature Is High................................. 42 Probable Causes ............................................... 42 Recommended Actions...................................... 43 Coolant Temperature Is Low.................................. 44 Probable Causes ............................................... 44 Recommended Actions...................................... 44 Crankcase Pressure Is High.................................. 45 Probable Causes ............................................... 46 Recommended Actions...................................... 46 D Data Link - Test...................................................... Diagnostic Capabilities .......................................... Diagnostic Codes............................................... Diagnostic Trouble Codes ..................................... Active Diagnostic Codes .................................... Cross-Reference Information for Diagnostic Codes............................................................... Diagnostic Codes............................................... Logged Diagnostic Codes.................................. E ECM - Congure.................................................. 214 ECM - Replace .................................................... 215 ECM Does Not Communicate with Other Modules ............................................................... 46 Probable Causes ............................................... 46 Recommended Actions...................................... 46 ECM Software - Install......................................... 213 Programming a Flash File................................ 214 81 14 14 22 29 22 28 29 ECM Will Not Accept Factory Passwords............ 207 Probable Causes ............................................. 207 Recommended Actions.................................... 207 Electrical Connectors............................................. 16 Connectors for the Electronic Control Module (ECM)............................................................... 16 Injector Connectors............................................ 18 Machine Interface Connectors ........................... 17 Rail Connectors at the ECM Panel .................... 17 Sensor Connectors ............................................ 18 Service Tool Connector for Caterpillar Electronic Technician ........................................................ 18 Termination Resistor for the CAN Data Link ...... 18 Electrical Connectors - Inspect............................ 216 Electrical Power Supply - Test ............................... 89 Electronic Service Tool Does Not Communicate.. 208 Electronic Service Tools .......................................... 5 Caterpillar Electronic Technician (ET).................. 5 Optional Service Tools ......................................... 5 Required Service Tools ........................................ 5 Electronic System Overview.................................... 8 Engine Cranks but Does Not Start ........................ 46 Probable Causes ............................................... 46 Recommended Actions...................................... 47 Engine Does Not Crank......................................... 49 Probable Causes ............................................... 49 Recommended Actions...................................... 49 Engine Has Mechanical Noise (Knock) ................. 50 Probable Causes ............................................... 50 Recommended Actions...................................... 50 Engine Misres, Runs Rough or Is Unstable......... 50 Probable Causes ............................................... 50 Recommended Actions...................................... 51 Engine Monitoring System..................................... 14 Viewing or Changing the Settings of the Monitoring System ............................................................. 14 Engine Overspeeds ............................................... 52 Probable Causes ............................................... 52 Recommended Actions...................................... 52 Engine Top Speed Is Not Obtained ....................... 53 Probable Causes ............................................... 53 Recommended Actions...................................... 53 Engine Vibration Is Excessive ............................... 53 Probable Causes ............................................... 53 Recommended Actions...................................... 53 Ether Starting Aid - Test......................................... 96 Event Codes .......................................................... 30 Cross-Reference Information for Event Codes .. 30 Engine Monitoring .............................................. 30 Machine Response to Active Event Codes........ 34 Parameter Settings of the Engine Monitoring System ............................................................. 34 Parts of the Event Code..................................... 32 Troubleshooting ................................................. 33 Exhaust Has Excessive Black Smoke ................... 54 Probable Causes ............................................... 54 Recommended Actions...................................... 54 Exhaust Has Excessive White Smoke................... 55 Probable Causes ............................................... 55 Recommended Actions...................................... 55
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F Factory Passwords .............................................. 207 Fuel Filter Is Restricted.......................................... 56 Probable Causes ............................................... 56 Recommended Actions...................................... 56 Fuel Pressure Is High ............................................ 57 Probable Causes ............................................... 57 Recommended Actions...................................... 57 Fuel Pressure Is Low............................................. 57 Probable Causes ............................................... 57 Recommended Actions...................................... 58 Fuel Priming Pump - Test .................................... 104 Fuel Rail Pressure - Test ...................................... 111 Fuel Rail Pressure Is High..................................... 59 Probable Causes ............................................... 59 Recommended Actions...................................... 59 Fuel Rail Pressure Is Low...................................... 60 Probable Causes ............................................... 60 Recommended Actions...................................... 60 Fuel Temperature Is High ...................................... 61 Probable Causes ............................................... 61 Recommended Actions...................................... 62 Fuel Transfer Pump Inlet Pressure Is Low ............ 62 Probable Causes ............................................... 62 Recommended Actions...................................... 62 G General Information................................................. 4 I Important Safety Information ................................... 2 Injector Solenoid - Test ........................................ 120 Injector Trim File - Install ..................................... 213 Inlet Air Is Restricted ............................................. 63 Probable Causes ............................................... 63 Recommended Actions...................................... 63 Intake Manifold Air Temperature Is High ............... 64 Probable Causes ............................................... 64 Recommended Actions...................................... 64 Introduction.............................................................. 4 O Oil Consumption Is Excessive ............................... Probable Causes ............................................... Recommended Actions...................................... Oil Contains Coolant.............................................. Probable Causes ............................................... Recommended Actions...................................... Oil Contains Fuel ................................................... Probable Causes ............................................... Recommended Actions...................................... Oil Filter Differential Pressure Problem ................. Probable Causes ............................................... Recommended Actions...................................... 65 65 65 65 65 66 66 66 66 66 67 67
Oil Pressure Is Low ............................................... 67 Probable Causes ............................................... 67 Recommended Actions...................................... 67 Oil Renewal - Test ............................................... 137 Oil Temperature Is High......................................... 68 Probable Causes ............................................... 68 Recommended Actions...................................... 69 P Power Is Intermittently Low or Power Cutout Is Intermittent........................................................... 69 Probable Causes ............................................... 69 Recommended Actions...................................... 69 Prelubrication - Test............................................. 143 Prelubrication Pump Problem................................ 70 Probable Causes ............................................... 70 Recommended Actions...................................... 70 S Sensor Signal (Analog, Active) - Test .................. 152 Sensor Signal (Analog, Passive) - Test ............... 164 Sensor Signal (PWM) - Test ................................ 173 Sensor Supply - Test ........................................... 181 Service................................................................. 207 Shutdown - Test................................................... 192 Speed/Timing - Test............................................. 197 Symptom Troubleshooting..................................... 39 T Table of Contents..................................................... 3 Test ECM Mode ................................................... 212 Troubleshooting Section .......................................... 4 Turbocharger Turbine Temperature Is High........... 71 Probable Causes ............................................... 71 Recommended Actions...................................... 71 V Valve Lash Is Excessive ........................................ Probable Causes ............................................... Recommended Actions...................................... Valve Rotator or Spring Lock Is Free..................... Probable Cause ................................................. Recommended Actions...................................... W Welding Precaution ................................................. 4 Wiring Information ................................................. 18 Harness Wire Identication ................................ 19 72 72 72 73 73 73
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Printed in U.S.A.