Diagnostic Trouble Codes
Diagnostic Trouble Codes
Diagnostic Trouble Codes
Shutdown SIS
Previous Screen
Troubleshooting
C175-16 and C175-20 Generator Set Engines
Media Number -RENR9339-15 Publication Date -01/04/2014 Date Updated -10/12/2015
i06516848
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. The
technician must have access to a diagnostic tool to read diagnostic information.
The following Module Identifiers (MID) are used to identify the control modules that are associated
with engine operation:
MID No. 036 is used to identify the engine Electronic Control Module (ECM)
MID No. 094 is used to identify the Temperature Control Module (TCM)
Tables 1 and 2 lists the diagnostic codes that apply to the engine ECM.
Table 2 lists the diagnostic codes that apply to the TCM for the engine cooling system.
Use Caterpillar Electronic Technician (ET) to determine the diagnostic codes that are active or
logged. Then refer to the appropriate troubleshooting procedure for more information.
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".
Diagnostic information is transmitted over data links. This engine uses the following two types of data
links for communication. The data links are described below:
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The Cat Data Link is used by the engine ECM to communicate with Caterpillar controllers or display
modules. Cat ET is a software program that is designed to run on a personal computer. The software
can be used by the service technician to view the diagnostic code information that is generated by the
engine ECM. The diagnostic code is displayed as a two-element code. The following terms describe
the elements of the code:
Component Identifier (CID) - The CID indicates the component that generated the code.
Failure Mode Identifier (FMI) - The FMI indicates the type of failure.
The CAN data link is used by the engine ECM to communicate with aftermarket controllers or display
modules. The CAN data link is referred to as the J1939 data link. When a diagnostic code is activated,
the ECM can transmit information about the diagnostic code over the J1939 data link to aftermarket
controllers. The diagnostic code will be displayed as a two-element code. The following terms
describe the elements of the code:
Suspect Parameter Number (SPN) - The SPN is a code which is assigned to each component to
identify data via the data link to the ECM.
Failure Mode Identifier (FMI) - The FMI indicates the type of failure.
Refer to Table 1, Table 2, and Table 3 for a complete list of the diagnostic codes and the appropriate
troubleshooting procedures. Further explanations of diagnostic codes are explained after Table 2.
Table 1
Cross-Reference from CID-FMI Code to SPN-FMI Code to the Appropriate Circuit Test
MID No. 036
Diagnostic Code SPN-FMI Code and
Troubleshooting Procedure
and Description Description
1-2 Cylinder #1 651-2 Engine Injector
Injector : Erratic, Cylinder #01 : Erratic,
Troubleshooting, "Injector Solenoid - Test"
Intermittent, or Intermittent, or
Incorrect Incorrect
Troubleshooting, "Injector Solenoid - Test"
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Intermittent, or Intermittent, or
Incorrect Incorrect
4-5 Cylinder #4 654-5 Engine Injector
Injector : Current Cylinder #04 : Current Troubleshooting, "Injector Solenoid - Test"
Below Normal Below Normal
4-6 Cylinder #4 654-6 Engine Injector
Injector : Current Cylinder #04 : Current Troubleshooting, "Injector Solenoid - Test"
Above Normal Above Normal
4-7 Cylinder #4
654-7 Engine Injector
Injector : Not Troubleshooting, "Fuel Systems Verification -
Cylinder #04 : Not
Responding Test"
Responding Properly
Properly
5-2 Cylinder #5 655-2 Engine Injector
Injector : Erratic, Cylinder #05 : Erratic,
Troubleshooting, "Injector Solenoid - Test"
Intermittent, or Intermittent, or
Incorrect Incorrect
5-5 Cylinder #5 655-5 Engine Injector
Injector : Current Cylinder #05 : Current Troubleshooting, "Injector Solenoid - Test"
Below Normal Below Normal
5-6 Cylinder #5 655-6 Engine Injector
Injector : Current Cylinder #05 : Current Troubleshooting, "Injector Solenoid - Test"
Above Normal Above Normal
5-7 Cylinder #5
655-7 Engine Injector
Injector : Not Troubleshooting, "Fuel Systems Verification -
Cylinder #05 : Not
Responding Test"
Responding Properly
Properly
6-2 Cylinder #6 656-2 Engine Injector
Injector : Erratic, Cylinder #06 : Erratic,
Troubleshooting, "Injector Solenoid - Test"
Intermittent, or Intermittent, or
Incorrect Incorrect
6-5 Cylinder #6 656-5 Engine Injector
Injector : Current Cylinder #06 : Current Troubleshooting, "Injector Solenoid - Test"
Below Normal Below Normal
6-6 Cylinder #6 656-6 Engine Injector
Injector : Current Cylinder #06 : Current Troubleshooting, "Injector Solenoid - Test"
Above Normal Above Normal
6-7 Cylinder #6
656-7 Engine Injector
Injector : Not Troubleshooting, "Fuel Systems Verification -
Cylinder #06 : Not
Responding Test"
Responding Properly
Properly
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Responding
Properly
10-2 Cylinder #10 660-2 Engine Injector
Injector : Erratic, Cylinder #10 : Erratic,
Troubleshooting, "Injector Solenoid - Test"
Intermittent, or Intermittent, or
Incorrect Incorrect
10-5 Cylinder #10 660-5 Engine Injector
Injector : Current Cylinder #10 : Current Troubleshooting, "Injector Solenoid - Test"
Below Normal Below Normal
10-6 Cylinder #10 660-6 Engine Injector
Injector : Current Cylinder #10 : Current Troubleshooting, "Injector Solenoid - Test"
Above Normal Above Normal
10-7 Cylinder #10
660-7 Engine Injector
Injector : Not Troubleshooting, "Fuel Systems Verification -
Cylinder #10 : Not
Responding Test"
Responding Properly
Properly
11-2 Cylinder #11 661-2 Engine Injector
Injector : Erratic, Cylinder #11 : Erratic,
Troubleshooting, "Injector Solenoid - Test"
Intermittent, or Intermittent, or
Incorrect Incorrect
11-5 Cylinder #11 661-5 Engine Injector
Injector : Current Cylinder #11 : Current Troubleshooting, "Injector Solenoid - Test"
Below Normal Below Normal
11-6 Cylinder #11 661-6 Engine Injector
Injector : Current Cylinder #11 : Current Troubleshooting, "Injector Solenoid - Test"
Above Normal Above Normal
11-7 Cylinder #11
661-7 Engine Injector
Injector : Not Troubleshooting, "Fuel Systems Verification -
Cylinder #11 : Not
Responding Test"
Responding Properly
Properly
12-2 Cylinder #12 662-2 Engine Injector
Injector : Erratic, Cylinder #12 : Erratic,
Troubleshooting, "Injector Solenoid - Test"
Intermittent, or Intermittent, or
Incorrect Incorrect
12-5 Cylinder #12 662-5 Engine Injector
Injector : Current Cylinder #12 : Current Troubleshooting, "Injector Solenoid - Test"
Below Normal Below Normal
12-6 Cylinder #12 662-6 Engine Injector
Injector : Current Cylinder #12 : Current Troubleshooting, "Injector Solenoid - Test"
Above Normal Above Normal
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12-7 Cylinder #12 662-7 Engine Injector Troubleshooting, "Fuel Systems Verification -
Injector : Not Cylinder #12 : Not Test"
Responding Responding Properly
Properly
13-2 Cylinder #13 663-2 Engine Injector
Injector : Erratic, Cylinder #13 : Erratic,
Troubleshooting, "Injector Solenoid - Test"
Intermittent, or Intermittent, or
Incorrect Incorrect
13-5 Cylinder #13 663-5 Engine Injector
Injector : Current Cylinder #13 : Current Troubleshooting, "Injector Solenoid - Test"
Below Normal Below Normal
13-6 Cylinder #13 663-6 Engine Injector
Injector : Current Cylinder #13 : Current Troubleshooting, "Injector Solenoid - Test"
Above Normal Above Normal
13-7 Cylinder #13
663-7 Engine Injector
Injector : Not Troubleshooting, "Fuel Systems Verification -
Cylinder #13 : Not
Responding Test"
Responding Properly
Properly
14-2 Cylinder #14 664-2 Engine Injector
Injector : Erratic, Cylinder #14 : Erratic,
Troubleshooting, "Injector Solenoid - Test"
Intermittent, or Intermittent, or
Incorrect Incorrect
14-5 Cylinder #14 664-5 Engine Injector
Injector : Current Cylinder #14 : Current Troubleshooting, "Injector Solenoid - Test"
Below Normal Below Normal
14-6 Cylinder #14 664-6 Engine Injector
Injector : Current Cylinder #14 : Current Troubleshooting, "Injector Solenoid - Test"
Above Normal Above Normal
14-7 Cylinder #14
664-7 Engine Injector
Injector : Not Troubleshooting, "Fuel Systems Verification -
Cylinder #14 : Not
Responding Test"
Responding Properly
Properly
15-2 Cylinder #15 665-2 Engine Injector
Injector : Erratic, Cylinder #15 : Erratic,
Troubleshooting, "Injector Solenoid - Test"
Intermittent, or Intermittent, or
Incorrect Incorrect
15-5 Cylinder #15 665-5 Engine Injector
Injector : Current Cylinder #15 : Current Troubleshooting, "Injector Solenoid - Test"
Below Normal Below Normal
Troubleshooting, "Injector Solenoid - Test"
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Voltage Above
Normal
2302-4 Engine
20-4 Engine Extended
Coolant Pump Outlet
Range Engine Coolant Troubleshooting, "Sensor Signal (Analog,
Pressure Sensor :
Pressure : Voltage Active) - Test"
Voltage Below
Below Normal
Normal
2303-3 Engine Block
Coolant Outlet 109-3 Engine Coolant
Troubleshooting, "Sensor Signal (Analog,
Pressure Sensor : Pressure : Voltage
Active) - Test"
Voltage Above Above Normal
Normal
2303-4 Engine Block
Coolant Outlet 109-4 Engine Coolant
Troubleshooting, "Sensor Signal (Analog,
Pressure Sensor : Pressure : Voltage
Active) - Test"
Voltage Below Below Normal
Normal
2323-3 Fuel Rail
3468-3 Engine Fuel
Temperature Sensor : Troubleshooting, "Sensor Signal (Analog,
Temperature 2 : Voltage
Voltage Above Passive) - Test"
Above Normal
Normal
2323-4 Fuel Rail
3468-4 Engine Fuel
Temperature Sensor : Troubleshooting, "Sensor Signal (Analog,
Temperature 2 : Voltage
Voltage Below Passive) - Test"
Below Normal
Normal
2348-9 SAE J1939
1231-9 J1939 Network
Data Link #2 :
#2 : Abnormal Update Troubleshooting, "Data Link - Test"
Abnormal Update
Rate
Rate
2349-19 Engine 4193-19 Engine Coolant
Coolant Pump Outlet Pump Outlet Troubleshooting, "Coolant Temperature Control
Temperature Sensor : Temperature Sensor : Module - Test"
Data Error Data Error
2417-5 Ether
626-5 Engine Start
Injection Control
Enable Device 1 : Troubleshooting, "Ether Starting Aid - Test"
Solenoid : Current
Current Below Normal
Below Normal
2417-6 Ether
626-6 Engine Start
Injection Control
Enable Device 1 : Troubleshooting, "Ether Starting Aid - Test"
Solenoid : Current
Current Above Normal
Above Normal
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2526-3 Air Inlet 172-3 Engine Air Inlet Troubleshooting, "Sensor Signal (Analog,
Temperature Sensor : Temperature : Voltage Passive) - Test"
Voltage Above Above Normal
Normal
2526-4 Air Inlet
172-4 Engine Air Inlet
Temperature Sensor : Troubleshooting, "Sensor Signal (Analog,
Temperature : Voltage
Voltage Below Passive) - Test"
Below Normal
Normal
2710-8 Engine
4202-8 Engine Speed
Tertiary Speed
Sensor #3 : Abnormal
Sensor : Abnormal Troubleshooting, "Speed/Timing - Test"
Frequency, Pulse Width,
Frequency, Pulse
or Period
Width, or Period
2710-11 Engine
4202-11 Engine Speed
Tertiary Speed
Sensor #3 : Other Troubleshooting, "Speed/Timing - Test"
Sensor : Other
Failure Mode
Failure Mode
2727-5 Starting
677-5 Engine Starter
System #1 Relay :
Motor Relay : Current Troubleshooting, "Starting - Test"
Current Below
Below Normal
Normal
2727-6 Starting
677-6 Engine Starter
System #1 Relay :
Motor Relay : Current Troubleshooting, "Starting - Test"
Current Above
Above Normal
Normal
2728-5 Starting
677-5 Engine Starter
System #2 Relay :
Motor Relay : Current Troubleshooting, "Starting - Test"
Current Below
Below Normal
Normal
2728-6 Starting
677-6 Engine Starter
System #2 Relay :
Motor Relay : Current Troubleshooting, "Starting - Test"
Current Above
Above Normal
Normal
2738-3 Turbocharger 1176-3 Engine
#1 Compressor Inlet Turbocharger 1
Troubleshooting, "Sensor Signal (Analog,
Pressure Sensor : Compressor Inlet
Active) - Test"
Voltage Above Pressure : Voltage
Normal Above Norm
2738-4 Turbocharger 1176-4 Engine Troubleshooting, "Sensor Signal (Analog,
#1 Compressor Inlet Turbocharger 1 Active) - Test"
Pressure Sensor : Compressor Inlet
Voltage Below Pressure : Voltage
Normal Below Normal
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Table 2
Cross-Reference from SPN-FMI Code to CID-FMI Code to the Appropriate Circuit Test
MID No. 036
SPN-FMI Code and Diagnostic Code
Troubleshooting Procedure
Description and Description
2302-3 Engine
20-3 Engine Extended
Coolant Pump Outlet
Range Engine Coolant Troubleshooting, "Sensor Signal (Analog,
Pressure Sensor :
Pressure : Voltage Active) - Test"
Voltage Above
Above Normal
Normal
2302-4 Engine
20-4 Engine Extended
Coolant Pump Outlet
Range Engine Coolant Troubleshooting, "Sensor Signal (Analog,
Pressure Sensor :
Pressure : Voltage Active) - Test"
Voltage Below
Below Normal
Normal
1690-8 Throttle #2
29-8 Accelerator Pedal
Position Sensor :
Position 2 : Abnormal
Abnormal Troubleshooting, "Speed Control - Test"
Frequency, Pulse Width,
Frequency, Pulse
or Period
Width, or Period
279-3 Aftercooler
52-3 Engine Intercooler Coolant Temperature
Troubleshooting, "Sensor Signal (Analog,
Temperature : Voltage Sensor (Front) :
Passive) - Test"
Above Normal Voltage Above
Normal
279-4 Aftercooler
52-4 Engine Intercooler Coolant Temperature
Troubleshooting, "Sensor Signal (Analog,
Temperature : Voltage Sensor (Front) :
Passive) - Test"
Below Normal Voltage Below
Normal
91-8 Throttle
91-8 Accelerator Pedal
Position Sensor :
Position 1 : Abnormal
Abnormal Troubleshooting, "Speed Control - Test"
Frequency, Pulse Width,
Frequency, Pulse
or Period
Width, or Period
94-3 Engine Fuel 289-3 Fuel Pressure Troubleshooting, "Sensor Signal (Analog,
Delivery Pressure : Sensor - Before Fuel Active) - Test"
Voltage Above Normal Filter : Voltage
Above Normal
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109-4 Engine Coolant 2303-4 Engine Block Troubleshooting, "Sensor Signal (Analog,
Pressure : Voltage Coolant Outlet Active) - Test"
Below Normal Pressure Sensor :
Voltage Below
Normal
110-3 Engine
110-3 Engine Coolant
Coolant Temperature Troubleshooting, "Sensor Signal (Analog,
Temperature : Voltage
Sensor : Voltage Passive) - Test"
Above Normal
Above Normal
110-4 Engine
110-4 Engine Coolant
Coolant Temperature Troubleshooting, "Sensor Signal (Analog,
Temperature : Voltage
Sensor : Voltage Passive) - Test"
Below Normal
Below Normal
157-3 Engine Injector 1797-3 Fuel Rail
Metering Rail 1 Pressure Sensor : Troubleshooting, "Sensor Signal (Analog,
Pressure : Voltage Voltage Above Active) - Test"
Above Normal Normal
157-4 Engine Injector 1797-4 Fuel Rail
Metering Rail 1 Pressure Sensor : Troubleshooting, "Sensor Signal (Analog,
Pressure : Voltage Voltage Below Active) - Test"
Below Normal Normal
The pressure in the high-pressure fuel system is
fluctuating out of specifications.
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.
157-7 Engine Injector 1797-7 Fuel Rail
Verify that there is no problem with the pressure
Metering Rail 1 Pressure Sensor : Not
sensor for the high-pressure fuel system. If a
Pressure : Not Responding
problem with the pressure sensor is suspected,
Responding Properly Properly
refer to Troubleshooting, "Sensor Signal
(Analog, Active) - Test".
Check for diagnostic codes that are related to
the high-pressure fuel control valve. Repair any
active codes. If the high-pressure fuel pump is
suspected of mechanical damage, replace the
pump.
During the engine crank cycle, the ECM did not
157-10 Engine Injector 1797-10 Fuel Rail
detect a deviation in the signal from the pressure
Metering Rail 1 Pressure Sensor :
sensor that is for the fuel rail. Refer to
Pressure : Abnormal Abnormal Rate of
Troubleshooting, "Sensor Supply - Test" to
Rate of Change Change
troubleshoot the sensor.
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158-2 Keyswitch Battery 1834-2 Ignition Key Troubleshooting, "Electrical Power Supply -
Potential : Erratic, Switch loss of signal Test"
Intermittent, or
Incorrect
168-0 Battery Potential / 168-0 Electrical
Troubleshooting, "Electrical Power Supply -
Power Input 1 : High - System Voltage :
Test"
most severe (3) High
168-1 Battery Potential / 168-1 Electrical
Troubleshooting, "Electrical Power Supply -
Power Input 1 : Low - System Voltage :
Test"
most severe (3) Low
168-2 Battery Potential / 168-2 Electrical
Power Input 1 : Erratic, System Voltage : Troubleshooting, "Electrical Power Supply -
Intermittent, or Erratic, Intermittent, Test"
Incorrect or Incorrect
172-3 Engine Air Inlet 2526-3 Air Inlet
Troubleshooting, "Sensor Signal (Analog,
Temperature : Voltage Temperature Sensor :
Passive) - Test"
Above Normal Voltage Above N
2526-4 Air Inlet
172-4 Engine Air Inlet
Temperature Sensor : Troubleshooting, "Sensor Signal (Analog,
Temperature : Voltage
Voltage Below Passive) - Test"
Below Normal
Normal
174-3 Fuel
174-3 Engine Fuel
Temperature Sensor : Troubleshooting, "Sensor Signal (Analog,
Temperature 1 : Voltage
Voltage Above Passive) - Test"
Above Normal
Normal
174-4 Fuel
174-4 Engine Fuel
Temperature Sensor : Troubleshooting, "Sensor Signal (Analog,
Temperature 1 : Voltage
Voltage Below Passive) - Test"
Below Normal
Normal
175-3 Engine Oil
175-3 Engine Oil
Temperature Sensor : Troubleshooting, "Sensor Signal (Analog,
Temperature 1 : Voltage
Voltage Above Passive) - Test"
Above Normal
Normal
175-4 Engine Oil
175-4 Engine Oil
Temperature Sensor : Troubleshooting, "Sensor Signal (Analog,
Temperature 1 : Voltage
Voltage Below Passive) - Test"
Below Normal
Normal
190-8 Engine Speed
190-8 Engine Speed :
Sensor : Abnormal
Abnormal Frequency, Troubleshooting, "Speed/Timing - Test"
Frequency, Pulse
Pulse Width, or Period
Width, or Period
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Intermittent, or Intermittent, or
Incorrect Incorrect
655-5 Engine Injector 5-5 Cylinder #5
Cylinder #05 : Current Injector : Current Troubleshooting, "Injector Solenoid - Test"
Below Normal Below Normal
655-6 Engine Injector 5-6 Cylinder #5
Cylinder #05 : Current Injector : Current Troubleshooting, "Injector Solenoid - Test"
Above Normal Above Normal
5-7 Cylinder #5
655-7 Engine Injector
Injector : Not
Cylinder #05 : Not Troubleshooting, "Injector Solenoid - Test"
Responding
Responding Properly
Properly
656-2 Engine Injector 6-2 Cylinder #6
Cylinder #06 : Erratic, Injector : Erratic,
Troubleshooting, "Injector Solenoid - Test"
Intermittent, or Intermittent, or
Incorrect Incorrect
656-5 Engine Injector 6-5 Cylinder #6
Cylinder #06 : Current Injector : Current Troubleshooting, "Injector Solenoid - Test"
Below Normal Below Normal
656-6 Engine Injector 6-6 Cylinder #6
Cylinder #06 : Current Injector : Current Troubleshooting, "Injector Solenoid - Test"
Above Normal Above Normal
6-7 Cylinder #6
656-7 Engine Injector
Injector : Not
Cylinder #06 : Not Troubleshooting, "Injector Solenoid - Test"
Responding
Responding Properly
Properly
657-2 Engine Injector 7-2 Cylinder #7
Cylinder #07 : Erratic, Injector : Erratic,
Troubleshooting, "Injector Solenoid - Test"
Intermittent, or Intermittent, or
Incorrect Incorrect
657-5 Engine Injector 7-5 Cylinder #7
Cylinder #07 : Current Injector : Current Troubleshooting, "Injector Solenoid - Test"
Below Normal Below Normal
657-6 Engine Injector 7-6 Cylinder #7
Cylinder #07 : Current Injector : Current Troubleshooting, "Injector Solenoid - Test"
Above Normal Above Normal
7-7 Cylinder #7
657-7 Engine Injector
Injector : Not
Cylinder #07 : Not Troubleshooting, "Injector Solenoid - Test"
Responding
Responding Properly
Properly
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Responding
Properly
661-2 Engine Injector 11-2 Cylinder #11
Cylinder #11 : Erratic, Injector : Erratic,
Troubleshooting, "Injector Solenoid - Test"
Intermittent, or Intermittent, or
Incorrect Incorrect
661-5 Engine Injector 11-5 Cylinder #11
Cylinder #11 : Current Injector : Current Troubleshooting, "Injector Solenoid - Test"
Below Normal Below Normal
661-6 Engine Injector 11-6 Cylinder #11
Cylinder #11 : Current Injector : Current Troubleshooting, "Injector Solenoid - Test"
Above Normal Above Normal
11-7 Cylinder #11
661-7 Engine Injector
Injector : Not
Cylinder #11 : Not Troubleshooting, "Injector Solenoid - Test"
Responding
Responding Properly
Properly
662-2 Engine Injector 12-2 Cylinder #12
Cylinder #12 : Erratic, Injector : Erratic,
Troubleshooting, "Injector Solenoid - Test"
Intermittent, or Intermittent, or
Incorrect Incorrect
662-5 Engine Injector 12-5 Cylinder #12
Cylinder #12 : Current Injector : Current Troubleshooting, "Injector Solenoid - Test"
Below Normal Below Normal
662-6 Engine Injector 12-6 Cylinder #12
Cylinder #12 : Current Injector : Current Troubleshooting, "Injector Solenoid - Test"
Above Normal Above Normal
12-7 Cylinder #12
662-7 Engine Injector
Injector : Not
Cylinder #12 : Not Troubleshooting, "Injector Solenoid - Test"
Responding
Responding Properly
Properly
663-2 Engine Injector 13-2 Cylinder #13
Cylinder #13 : Erratic, Injector : Erratic,
Troubleshooting, "Injector Solenoid - Test"
Intermittent, or Intermittent, or
Incorrect Incorrect
663-5 Engine Injector 13-5 Cylinder #13
Cylinder #13 : Current Injector : Current Troubleshooting, "Injector Solenoid - Test"
Below Normal Below Normal
663-6 Engine Injector 13-6 Cylinder #13
Cylinder #13 : Current Injector : Current Troubleshooting, "Injector Solenoid - Test"
Above Normal Above Normal
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663-7 Engine Injector 13-7 Cylinder #13 Troubleshooting, "Injector Solenoid - Test"
Cylinder #13 : Not Injector : Not
Responding Properly Responding
Properly
664-2 Engine Injector 14-2 Cylinder #14
Cylinder #14 : Erratic, Injector : Erratic,
Troubleshooting, "Injector Solenoid - Test"
Intermittent, or Intermittent, or
Incorrect Incorrect
664-5 Engine Injector 14-5 Cylinder #14
Cylinder #14 : Current Injector : Current Troubleshooting, "Injector Solenoid - Test"
Below Normal Below Normal
664-6 Engine Injector 14-6 Cylinder #14
Cylinder #14 : Current Injector : Current Troubleshooting, "Injector Solenoid - Test"
Above Normal Above Normal
14-7 Cylinder #14
664-7 Engine Injector
Injector : Not
Cylinder #14 : Not Troubleshooting, "Injector Solenoid - Test"
Responding
Responding Properly
Properly
665-2 Engine Injector 15-2 Cylinder #15
Cylinder #15 : Erratic, Injector : Erratic,
Troubleshooting, "Injector Solenoid - Test"
Intermittent, or Intermittent, or
Incorrect Incorrect
665-5 Engine Injector 15-5 Cylinder #15
Cylinder #15 : Current Injector : Current Troubleshooting, "Injector Solenoid - Test"
Below Normal Below Normal
665-6 Engine Injector 15-6 Cylinder #15
Cylinder #15 : Current Injector : Current Troubleshooting, "Injector Solenoid - Test"
Above Normal Above Normal
15-7 Cylinder #15
665-7 Engine Injector
Injector : Not
Cylinder #15 : Not Troubleshooting, "Injector Solenoid - Test"
Responding
Responding Properly
Properly
666-2 Engine Injector 16-2 Cylinder #16
Cylinder #16 : Erratic, Injector : Erratic,
Troubleshooting, "Injector Solenoid - Test"
Intermittent, or Intermittent, or
Incorrect Incorrect
666-5 Engine Injector 16-5 Cylinder #16
Cylinder #16 : Current Injector : Current Troubleshooting, "Injector Solenoid - Test"
Below Normal Below Normal
Troubleshooting, "Injector Solenoid - Test"
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Voltage Above
Normal
1491-4 Right Turbo
1181-4 Engine
Turbine Inlet
Turbocharger 2 Turbine Troubleshooting, "Sensor Signal (PWM) -
Temperature Sensor :
Inlet Temperature : Test"
Voltage Below
Voltage Below Normal
Normal
1491-8 Right Turbo
1181-8 Engine
Turbine Inlet
Turbocharger 2 Turbine
Temperature Sensor : Troubleshooting, "Sensor Signal (PWM) -
Inlet Temperature :
Abnormal Test"
Abnormal Frequency,
Frequency, Pulse
Pulse Width, or Period
Width, or Period
2301-3 Aftercooler
1203-3 Engine Auxiliary Coolant Pump Outlet
Troubleshooting, "Sensor Signal (Analog,
Coolant Pressure : Pressure Sensor :
Active) - Test"
Voltage Above Normal Voltage Above
Normal
2301-4 Aftercooler
1203-4 Engine Auxiliary Coolant Pump Outlet
Troubleshooting, "Sensor Signal (Analog,
Coolant Pressure : Pressure Sensor :
Active) - Test"
Voltage Below Normal Voltage Below
Normal
542-3 Engine Oil
1208-3 Engine Pre-filter Pressure Sensor -
Troubleshooting, "Sensor Signal (Analog,
Oil Pressure : Voltage Before Oil Filter :
Active) - Test"
Above Normal Voltage Above
Normal
542-4 Engine Oil
1208-4 Engine Pre-filter Pressure Sensor -
Troubleshooting, "Sensor Signal (Analog,
Oil Pressure : Voltage Before Oil Filter :
Active) - Test"
Below Normal Voltage Below
Normal
542-10 Engine Oil
1208-10 Engine Percent
Pressure Sensor -
Torque At Point 4 :
Before Oil Filter : Troubleshooting, "Sensor Supply - Test"
Abnormal Rate of
Abnormal Rate of
Change
Change
2348-9 SAE J1939
1231-9 J1939 Network
Data Link #2 :
#2 : Abnormal Update Troubleshooting, "Data Link - Test"
Abnormal Update
Rate
Rate
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1382-3 Engine Fuel 3418-3 Fuel Filter Troubleshooting, "Sensor Signal (Analog,
Filter (suction side) (suction side) Active) - Test"
Differential Pressure : Differential Pressure
Voltage Above Normal Sensor : Voltage
Above Normal
3418-4 Fuel Filter
1382-4 Engine Fuel
(suction side)
Filter (suction side) Troubleshooting, "Sensor Signal (Analog,
Differential Pressure
Differential Pressure : Active) - Test"
Sensor : Voltage
Voltage Below Normal
Below Normal
1627-5 Fuel Pump 1627-5 Fuel Pump
Relay : Current Below Relay : Current Troubleshooting, "Fuel Priming Pump - Test"
Normal Below Normal
1627-6 Fuel Pump 1627-6 Fuel Pump
Relay : Current Above Relay : Current Troubleshooting, "Fuel Priming Pump - Test"
Normal Above Normal
1656-2 Engine
336-2 Engine
Automatic Start Enable
Control Switch :
Switch : Erratic, Troubleshooting, "Data Link - Test"
Erratic, Intermittent,
Intermittent, or
or Incorrect
Incorrect
2813-5 Engine Air
446-5 Air Shutdown
Shutoff Command
Relay : Current Troubleshooting, "Shutdown - Test"
Status : Current Below
Below Normal
Normal
2813-6 Engine Air
Shutoff Command 446-6 Air Shutoff
Troubleshooting, "Shutdown - Test"
Status : Current Above Relay short
Normal
2853-9 Engine
2853-9 Communications Aftercooler Coolant
Connection : Abnormal Temperature Control Troubleshooting, "Data Link - Test"
Update Rate Module : Abnormal
Update Rate
2854-9 Coolant
2854-9 Communications
Temperature Control
Carrier : Abnormal Troubleshooting, "Data Link - Test"
Module : Abnormal
Update Rate
Update Rate
338-5 Engine Pre-
3551-5 Engine Oil
Lube Pump Relay :
Priming State : Current Troubleshooting, "Prelubrication - Test"
Current Below
Below Normal
Normal
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Note: Use Cat ET to clear diagnostic codes. Keyswitch power to the engine must be cycled to
complete clearing of the codes from the TCM.
Table 3
Cross-Reference from SPN-FMI Code to the Appropriate Test Procedure
MID No. 094
SPN-FMI Code and
Troubleshooting Procedure
Description
168-3 Battery Potential /
Power Input 1 : Voltage Troubleshooting, "Coolant Temperature Control Module - Test"
Above Normal
168-4 Battery Potential /
Power Input 1 : Voltage Troubleshooting, "Coolant Temperature Control Module - Test"
Below Normal
628-2 Program Memory :
During a self-test, the TCM has detected an internal memory fault.
Erratic, Intermittent, or
Replace the TCM.
Incorrect
During a self-test, the TCM has detected a problem writing
630-2 Calibration Memory :
calibration data to memory. The TCM will continue to operate
Erratic, Intermittent, or
using calibration data that was stored previously. Replace the
Incorrect
TCM during the next service interval.
2901-0 ECU Part Number : The internal temperature of the TCM has exceeded the operational
High - most severe (3) range of the unit. The three-way valve is commanded to the fault
position. If necessary, install heat shields or relocate the TCM.
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When the engine ECM generates an active diagnostic code, the "Active Alarm" indicator ("Engine
Control Alarm Status" on Cat ET) is activated. The indicator is used to alert the operator of the active
code. If the condition that generated the code is momentary, the message disappears from the list of
active diagnostic codes. The diagnostic code becomes logged.
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Illustration 1 g01785898
Example of the typical operating range of a sensor
(1) This area represents the normal operating range of the engine parameter.
(2) In this area, 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 Codes" 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.
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When the ECM generates a diagnostic code, the ECM logs the code in permanent memory. The ECM
has an internal diagnostic clock. Each ECM will record the following information when a code is
generated:
A code is cleared from memory when one of the following conditions occur:
A new code is logged and there are already ten codes in memory. In this case, the oldest code is
cleared.
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.
Copyright 1993 - 2016 Caterpillar Inc. Thu Aug 25 15:20:53 UTC-0400 2016
All Rights Reserved.
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