en
en
en
Issue 1
en
EBS
Troubleshooting with the diagnostic lamp
1 712 065
114 596
Contents
General
Diagnostics panel ........................................................3 Diagnostic memory function ......................................3 Driving with output tester ...........................................4
Troubleshooting
Description of flash code functions ............................5 Axle configurations.....................................................5 Flash codes..................................................................6 Faults without flash codes...........................................58
Scania Diagnos
ED C E TC
10_2287
A maximum of 15 fault codes can be stored. If a 16th fault occurs, it will replace the one that was stored first. The fault code stored first (the oldest one) is displayed first. All stored fault codes are deleted when the memory is cleared.
1060t21b.mkr
05_5161
Scania Diagnos
Troubleshooting
The EBS flash code does not have a configuration code. The button must be pressed for at least 2 seconds to retrieve any flash codes. The power must be turned on with the starter key. The diagnostic lamp is then off for 1.5 seconds before starting to flash. The different series of flashes are separated by a distinct pause. A sequence of flash codes always ends with a completion code of 2 plus 1 flashes. This code indicates that there are no more codes present. Diagnostic flashes must be read while the vehicle is stationary.
3/2
D= Diagnostic switch pressed for 2 seconds Flash code 3/2 = First stored fault code Flash code 2/2 = Second stored fault code Flash code 2/1 = No fault
2/2
2/1
1060t21b.mkr
114 485
Scania Diagnos
Axle configurations
The following illustrations show the locations of the various axles and control modules.
EBS 2.2
1060t21b.mkr
Flash codes
Flash codes
Fault: Internal fault in the control unit. Cause: Self-test interrupted or data processing fault. Remarks: The ABS warning lamp and the lamp for low brake pressure are on. The system operates in backup mode. Action: Clear the fault memory. If the fault code recurs after the fault memory has been cleared, the control unit should be renewed. This is also recommended if the fault recurs during normal driving.
1060t21b.mkr
Flash codes
Fault: Internal fault in the control unit. Cause: Self-test interrupted or data processing fault. Remarks: The ABS warning lamp and the lamp for low brake pressure are on. The system operates in backup mode. Action: Clear the fault memory. If the fault code recurs after the fault memory has been cleared, the control unit should be renewed. This is also recommended if the fault recurs during normal driving.
1060t21b.mkr
Flash codes
Fault: Internal fault in the control unit. Cause: Self-test interrupted or data processing fault. Internal fault in the control unit. Remarks: The ABS warning lamp and the lamp for low brake pressure are on. The system operates in backup mode. Action: Clear the fault memory. If the fault code recurs after the fault memory has been cleared, the control unit should be renewed. This is also recommended if the fault recurs during normal driving.
1060t21b.mkr
Flash codes
Fault: Internal fault in the control unit. Cause: Self-test interrupted or data processing fault. Remarks: The ABS warning lamp and the lamp for low brake pressure are on. The system operates in backup mode. Action: Clear the fault memory. If the fault code recurs after the fault memory has been cleared, the control unit should be renewed. This is also recommended if the fault recurs during normal driving.
1060t21b.mkr
Flash codes
Fault: Internal fault in control unit. Cause: Check sum error in the EEPROM. Remarks: The ABS warning lamp and the lamp for low brake pressure are on. The system operates in backup mode. Action: Reprogram the control unit. If the fault recurs after reprogramming, the control unit should be renewed. This should also be done if the fault recurs during normal driving.
Fault: Internal fault in the control unit. Cause: Self-test interrupted or data processing fault. Remarks: The ABS warning lamp and the lamp for low brake pressure are on. The system operates in backup mode.
10
1060t21b.mkr
Flash codes
Action: Clear the fault memory. If the fault code recurs after the fault memory has been cleared, the control unit should be renewed. This is also recommended if the fault recurs during normal driving.
Fault: Internal fault in the control unit. Cause: Self-test interrupted or data processing fault. Remarks: The ABS warning lamp and the lamp for low brake pressure are on. The system operates in backup mode. Action: Clear the fault memory. If the fault code recurs after the fault memory has been cleared, the control unit should be renewed. This is also recommended if the fault recurs during normal driving.
1060t21b.mkr
11
Flash codes
Fault: Internal fault in the control unit. Cause: Incorrect wheel compensation value. Remarks: The vehicle has no ABS function. ABS lamps are on. Action: Clear the fault memory and reprogram the control unit. If the fault code recurs after the fault memory has been cleared, the control unit should be renewed. This is also recommended if the fault recurs during normal driving.
12
1060t21b.mkr
Flash codes
Fault: Incorrect service brake valve characteristic. Cause: Check sum error in the EEPROM. Remarks: ABS warning lamp is on. Action: Reprogram the control unit. If the fault recurs after reprogramming, the control unit should be renewed. This should also be done if the fault recurs during normal driving.
1060t21b.mkr
13
Flash codes
Fault: Internal fault in the control unit. Cause: Software not compatible. Remarks: The ABS warning lamp and the lamp for low brake pressure are on. The system operates in backup mode. Action: Reprogram the control unit. If the fault recurs after reprogramming, the control unit should be renewed. This should also be done if the fault recurs during normal driving.
Fault: Internal fault in the control unit. Cause: Self-test interrupted or data processing fault. Remarks: The ABS warning lamp and the lamp for low brake pressure are on. The system operates in backup mode. Action: Clear the fault memory. If the fault code recurs after the fault memory has been cleared, the control unit should be renewed. This is also recommended if the fault recurs during normal driving.
14
1060t21b.mkr
Flash codes
Fault: Pedal position sensor voltage level too low or too high. Cause: The voltage between pins B-2 and B-3 of the control unit is out of range. Remarks: The ABS warning lamp and the lamp for low brake pressure are on. The system operates in backup mode. This fault code can also be generated if the earth connections, pin A-10 (GND) and pin A-12 (GND_MO), have different voltages. The cable may be shorted to +24 V or to earth. Action: Check the 5 V cable to the pedal position sensor in D39 (pin B-2). Check the connections to earth. Take a voltage reading between pins B-2 and B-3 of the control unit. The voltage should be between 4.55 V and 5.45 V. Check the control unit's connection to earth, pin A-12.
1060t21b.mkr
15
Flash codes
Fault: Incorrect signal from pedal position sensor in service brake valve. Cause: The control unit has sensed that the signal from the pedal position sensor is out of range. Remarks: The ABS warning lamp and the lamp for low brake pressure are on. The system operates in backup mode. Action: Check cables and connections between the control unit and potentiometer. Measure the resistance of the potentiometer in the service brake valve. Measure the power supply at the control unit. Check for open circuit or short circuit. Permitted potentiometer resistance: Between pin 2 and pin 1: 4.2 kohms - 7.5 kohms. Between pin 3 and pin 1: 4.9 kohms 2.1 kohms. Permitted voltage range in the potentiometer signal, measured at the control unit: Between pin B-7 and pin B-3 (SM1): 0,3. V - 4.5 V. Between pin B-4 and pin B-3 (SM2): 0.3 -> 4.5 V. Note: The connector must be detached from the service brake valve when measuring.
16
1060t21b.mkr
Flash codes
Fault: Incorrect signal from load-sensing pressure sensor in air bellows. Cause: The voltage between pins F-2 and F-1 of the control module is out of range. Remarks: ABS warning lamp is on. The system does not use the load-sensing function but operates at an axle pressure of approx. 8 tons. Action: Check the cables and connectors between the control module and the load-sensing pressure sensor in air bellows (T46). Check for open circuit or short circuit. Permitted voltage from load-sensing pressure sensor in air bellows between pin F-2 and pin F-1 on control module: 0.3 V -> 4.7 V.
1060t21b.mkr
17
Flash codes
Fault: Incorrect feedback signal (response signal) from the driver stage of the wear warning lamp (W18). Cause: Lamp defective, fault in driver stage for warning lamp W18 or open-circuit in the cable to the lamp. Remarks: The EBS function is not affected by this fault. The control unit nonetheless continuously attempts to activate the ABS warning lamp. Action: Clear the fault memory. Check the lamp. Check the wiring for an open circuit or shorting to earth or +24 V. If the fault recurs after the memory has been cleared, the control unit should be renewed.
18
1060t21b.mkr
Flash codes
Fault: Incorrect feedback signal (response signal) from the driver stage of the ABS warning lamp W8. Cause: Lamp defective, fault in driver stage for warning lamp W8 or open-circuit in the cable to the lamp. Remarks: The EBS function is not affected by this fault. The control unit nonetheless continuously attempts to activate the ABS warning lamp. The warning lamp for low brake pressure is on. Action: Clear the fault memory. Check the lamp. Check the wiring for an open circuit or shorting to earth or +24 V. If the fault recurs after the memory has been cleared and there are no faults in the wiring, the control unit should be renewed.
1060t21b.mkr
19
Flash codes
Fault: Incorrect feedback signal (response signal) from the driver stage for the red warning lamp for low brake pressure. Cause: Short-circuit to +24 volt or fault in driver stage for the red warning lamp for low brake pressure or an open circuit in the cable to the lamp. Remarks: The EBS function is not affected by this fault. The control unit nonetheless continuously attempts to activate the central warning lamp. Yellow ABS warning lamp is on. Action: Clear the fault memory. Check the wiring for a short to +24 V. If the fault recurs after the memory has been cleared and there is no shortcircuit, the control unit should be renewed.
20
1060t21b.mkr
Flash codes
Fault: Should not occur on Scania vehicles. Cause: Should not occur on Scania vehicles. Remarks: Should not occur on Scania vehicles. Action: Should not occur on Scania vehicles.
1060t21b.mkr
21
Flash codes
Fault: Short circuit in any of the control unit driver stages for control modules. Cause: Fault in the driver stage for the control modules or an open-circuit in the cable to one of the control modules. Remarks: The ABS warning lamp and the lamp for low brake pressure are on. The system operates in backup mode. Action: Clear the fault memory. Check the wiring for an open circuit or shorting to earth or +24 V. If the fault recurs after the memory has been cleared, the control unit should be renewed.
22
1060t21b.mkr
Flash codes
Fault: Response time too long for signal between EBS and retarder. Cause: The EBS control unit has detected that the retarder control unit has not responded to the CAN signal within the specified time. Remarks: ABS warning lamp is on. The system is operative, but without engine control function. Action: Check for open or short circuit in the CAN cable between EBS and the retarder control unit. Check the retarder control unit for normal operation.
1060t21b.mkr
23
Flash codes
Fault: Response time too long for signal between EBS and EDC. Cause: The EBS control unit has detected that the EDC control unit has not responded to the CAN signal within the specified time. Remarks: ABS warning lamp is on. The system is operative, but without engine control function. Action: Check for open or short circuit in the CAN cable between the EBS and the EDC control unit. Check the EDC control unit for normal operation.
24
1060t21b.mkr
Flash codes
Fault: Fault in ABS sensor/pulse wheel or wiring. Flash code 7/1 8/1 9/1 10/1 11/1 Location Left-hand wheel, axle 1 Right-hand wheel, axle 4 Left-hand wheel, axle 2 Right-hand wheel, axle 3 Left-hand wheel, axle 3.
Cause: The control unit has detected that signals from the wheel sensor are missing at speeds above 18 km/h or that the signal from the wheel sensor exceeds 40 km/h when no speed is recorded by any other wheel sensor. Remarks: ABS warning lamp is on. The TC function is disengaged. The signal from the wheel sensor is recorded in the control module which then sends it to the control unit. Note: All wheels must be turning (including those on axle 3) in order for the ABS lamp to go out.
1060t21b.mkr
25
Flash codes
Action: Check the fault codes after driving. If a fault code recurs after it has been cleared: Check cables and connections between the control module and wheel sensor. Measure the wheel sensor resistance. Resistance should be 950 -1930 ohm.
Fault: Fault in ABS sensor/pulse wheel or wiring. Flash code 7/2 8/2 9/2 10/2 11/2 12/2 Location Left-hand wheel, axle 4 Right-hand wheel, axle 1 Left-hand wheel, axle 3. Right-hand wheel, axle 2 Right-hand wheel, axle 3 Right-hand wheel, axle 3
Cause: The control unit has detected that signals from the wheel sensor are missing at speeds above 18 km/h or that the signal from the wheel sensor exceeds 40 km/h when no speed is recorded by any other wheel sensor. Remarks: ABS warning lamp is on. The TC function is disengaged. The signal from the wheel sensor is recorded in the control module which then sends it to the control unit. Note: All wheels must be turning (including those on axle 3) in order for the ABS lamp to go out.
26
1060t21b.mkr
Flash codes
Action: Check the fault codes after driving. If a fault code recurs after it has been cleared: Check cables and connections between the control module and wheel sensor. Measure the wheel sensor resistance. Resistance should be 950 -1930 ohm.
1060t21b.mkr
27
Flash codes
Fault: Incorrect voltage to wear sensor. Flash code 7/3 8/3 9/3 10/3 11/3 Cause Single control module, axles 1 and 4 left-hand side Single control module, axles 1 and 4 right-hand side Double control module, axle 2 left-hand side Double control module, axle 2 right-hand side Double control module, axle 3 left-hand side, single control module, tag axle Double control module, axle 3 right-hand side
12/3
Cause: Short-circuit or open-circuit. Remarks: Warning lamp for brake pad wear is on. The signal from the wear sensors is recorded in the control module which then sends the signal to the control unit.
28
1060t21b.mkr
Flash codes
Action: 1. Check the cables and connections between the control module and wear sensor. 2. Take a voltage reading (between pins 1 and 4 of the control module). The voltage should be 5 +/-0.45 volts. Use a multimeter with recording function to take the voltage reading.
1060t21b.mkr
29
Flash codes
Fault: Internal fault in the control module or fault in the air supply to the control module. Flash code 7/4 8/4 9/4 10/4 11/4 Control module Single control module, axles 1 and 4 left-hand side Single control module, axles 1 and 4 right-hand side Double control module, axle 2 lefthand side Double control module, axle 2 right-hand side Double control module, axle 3 lefthand side, single control module, tag axle Double control module, axle 3 right-hand side
12/4
Cause: Implausible value from the pressure sensor in the control module. Remarks: The warning lamps for ABS and low brake pressure are on. The control module is disengaged by the control unit and braking of both wheels on the axle concerned is carried out by the pneumatic brake system via the back-up circuit. In addition, the ABS, the TC functions and the load-sensing system become inoperative.
30
1060t21b.mkr
Flash codes
Action: Check the compressed air lines to the control module. Check the control module for normal operation. Clear the fault code memory. If the fault recurs, renew the control module.
1060t21b.mkr
31
Flash codes
Fault: No CAN signal from control module. Flash code 7/5 8/5 9/5 10/5 11/5 Control module Single control module, axles 1 and 4 left-hand side Single control module, axles 1 and 4 right-hand side Double control module, axle 2 lefthand side Double control module, axle 2 right-hand side Double control module, axle 3 lefthand side, single control module, tag axle Double control module, axle 3 right-hand side
12/5
Cause: The control unit cannot contact the control module via the CAN brake cables. Remarks: The ABS warning lamp and the lamp for low brake pressure are on. The control modules are connected via their own CAN cables, which are separate from the other CAN cables. The control module is disengaged by the control unit and braking of both wheels on the axle concerned is carried out by the pneumatic brake system via the back-up circuit. In addition, the ABS and TC functions and the load-sensing system become inoperative.
32
1060t21b.mkr
Flash codes
Action: Check the CAN, earth and power cables to the control module. Check the connections between the control unit and control module.
1060t21b.mkr
33
Flash codes
Fault: The control module is not compatible with the control unit. Flash code 7/6 8/6 9/6 10/6 11/6 Control module Single control module, axles 1 and 4 left-hand side Single control module, axles 1 and 4 right-hand side Double control module, axle 2 left-hand side Double control module, axle 2 right-hand side Double control module, axle 3 left-hand side, single control module, tag axle Double control module, axle 3 right-hand side
12/6
Cause: The software in the control module is not compatible with the software in the control unit. Remarks: The ABS warning lamp and the lamp for low brake pressure are on. The control module is disengaged by the control unit and braking of both wheels on the axle concerned is carried out by the pneumatic brake system via the back-up circuit. In addition, the ABS and TC functions and the load-sensing system become inoperative.
34
1060t21b.mkr
Flash codes
Action: Either replace the control module with one that is compatible with the control unit in the vehicle or replace the control unit with one that is compatible with the control modules in the vehicle.
1060t21b.mkr
35
Flash codes
Fault: The control module cannot send the requested pressure to the brake chamber. Flash code 7/7 8/7 9/7 10/7 11/7 Control module Single control module, axles 1 and 4 left-hand side Single control module, axles 1 and 4 right-hand side Double control module, axle 2 left-hand side Double control module, axle 2 right-hand side Double control module, axle 3 left-hand side, single control module, tag axle Double control module, axle 3 right-hand side
12/7
Cause: The control module has attempted to send the requested pressure to the brake cylinder for some time, but has been unsuccessful. (In order for the flash code to be generated, the requested pressure must be below 4 bar). Remarks: The ABS warning lamp and the lamp for low brake pressure are on. This fault code will be prevented if the control unit senses that the low-pressure indicator indicates low supply pressure. The control module is disconnected by the control unit and braking of the wheel is carried out by the pneumatic brake system via the backup circuit. In addition, the ABS and TC functions and the load-sensing system become inoperative.
36
1060t21b.mkr
Flash codes
Action: 1. Check that brake pressure in the front and rear circuits is normal. 2. Check the supply line to the control module. 3. Check the control module for normal operation. 4. Check the low-pressure indicator. 5. Check the cable between the low-pressure indicator and the control unit. Note: The value from the control modules' pressure sensors can be read out using Scania Diagnos.
1060t21b.mkr
37
Flash codes
Fault: Internal fault in the control module. Flash code 7/8 8/8 9/8 10/8 11/8 Control module Single control module, axles 1 and 4 left-hand side Single control module, axles 1 and 4 right-hand side Double control module, axle 2 left-hand side Double control module, axle 2 right-hand side Double control module, axle 3 left-hand side, single control module, tag axle Double control module, axle 3 right-hand side
12/8
Cause: Automatic self-test in the control module failed. Remarks: The ABS warning lamp and the lamp for low brake pressure are on. The control module is disengaged by the control unit and braking of both wheels on the axle concerned is carried out by the pneumatic brake system via the back-up circuit. In addition, the ABS and TC functions and the load-sensing system become inoperative.
38
1060t21b.mkr
Flash codes
Action: Clear the fault code memory. If the fault code recurs after it has been cleared, the control module must be renewed.
1060t21b.mkr
39
Flash codes
Fault: The rolling circumference differs too much from that of the other wheels. Flash code 7/9 8/9 9/9 10/9 11/9 Cause: The control unit has sensed that the rolling circumference differs from the mean value for the other wheels by more than 9%. The rolling circumference differs too much from that of the other wheels. Remarks: ABS warning lamp is on. The TC function becomes inoperative. ABS control becomes inoperative on this wheel. Action: Check the tyre sizes on front and rear axles and change any tyres that are not of the right size. Location Left-hand wheel, axle 1 Right-hand wheel, axle 4 Left-hand wheel, axle 2 Right-hand wheel, axle 3 Left-hand wheel, axle 3.
40
1060t21b.mkr
Flash codes
Fault: The rolling circumference differs too much from that of the other wheels. Flash code 7/10 8/10 9/10 10/10 11/10 12/10 Cause: The control unit has sensed that the rolling circumference differs from the mean value for the other wheels by more than 9%. Remarks: ABS warning lamp is on. The TC function becomes inoperative. ABS control becomes inoperative on this wheel. Action: Check the tyre sizes on front and rear axles and change any tyres that are not of the right size. Location Left-hand wheel, axle 4 Right-hand wheel, axle 1 Left-hand wheel, axle 3 Right-hand wheel, axle 2 Right-hand wheel, axle 3 Right-hand wheel, axle 3
1060t21b.mkr
41
Flash codes
Fault: Incorrect signal from load-sensing pressure sensor in air bellows. Cause: The voltage between pins F-1 and F-4 of the double control module is out of range. Remarks: ABS warning lamp is on. The system does not use the load-sensing function but operates at full axle pressure. Action: Check the cables and connectors between the control module and the load-sensing pressure sensor in air bellows (T46). Check for open circuit or short circuit. Permitted voltage to load-sensing pressure sensor in air bellows between pin F-1 and pin F4 on double control module: 4.55 V -> 5.45 V.
42
1060t21b.mkr
Flash codes
Fault: Pressure difference between control modules. Flash code 7/12 9/12 11/12 Location Shaft 1 Shaft 2 Shaft 3
Cause: If a pressure difference > 0.8 bar occurs for more than 3 seconds between the control modules. The current pressure values can be obtained by using Scania Diagnos. Remarks: The ABS warning lamp and the lamp for low brake pressure are on. The system enters backup mode for axle. Action: Check the pressure of each control module. Renew the defective control module.
1060t21b.mkr
43
Flash codes
Fault: Automatic pulse test in the control module failed. Flash code 7/13 8/13 9/13 10/13 11/13 Control module Single control module, axles 1 and 4 left-hand side Single control module, axles 1 and 4 right-hand side Double control module, axle 2 left-hand side Double control module, axle 2 right-hand side Double control module, axle 3 left-hand side, single control module, tag axle Double control module, axle 3 right-hand side
12/13
Cause: The control module has sensed a residual pressure of more than 0.8 bar during the pulse test. Remarks: The warning lamp for low brake pressure is on. The fault code is generated when the pulse test, which starts automatically when the ignition is switched on, leaves a residual pressure of more than 0.8 bar. This may occur when an air line is blocked or if the control module is defective.
44
1060t21b.mkr
Flash codes
Action: 1. Check that the air can pass freely through the air lines to the control module. 2. Check the control module for normal operation. 3. Renew the control module.
1060t21b.mkr
45
Flash codes
Fault: Internal fault in the control module or fault in the air supply to the control module. Flash code 7/14 8/14 9/14 10/14 11/14 Control module Single control module, axles 1 and 4 left-hand side Single control module, axles 1 and 4 right-hand side Double control module, axle 2 left-hand side Double control module, axle 2 right-hand side Double control module, axle 3 left-hand side, single control module, tag axle Double control module, axle 3 right-hand side
12/14
Cause: 1. The fault occurs if the compressed air lines are closed or dirty. 2. Defective service brake valve. 3. Internal fault in the control module. Remarks: The ABS warning lamp and the lamp for low brake pressure are on. The control module is disengaged by the control unit and braking of both wheels on the axle concerned is carried out by the pneumatic brake system via the back-up circuit. In addition, the ABS and TC functions and the load-sensing system become inoperative.
46
1060t21b.mkr
Flash codes
Action: 1. Check the pressure in port 4 (backup circuit). 2. Check that the air can pass freely through the air lines to the control module. 3. Check the control module for normal operation. 4. Renew the control module.
1060t21b.mkr
47
Flash codes
Remarks: ABS warning lamp is on. EBS function without limitations in the vehicle. Trailer control module is supplied with voltage. Action: Clear fault codes. Renew the trailer control module if the fault code recurs.
48
1060t21b.mkr
Flash codes
Fault: Internal fault in the trailer control module. Cause: Remarks: ABS warning lamp is on. EBS function without limitations in the vehicle. Trailer control module is supplied with voltage. Action: Clear fault codes. Renew the trailer control module if the fault code recurs.
1060t21b.mkr
49
Flash codes
Fault: Incorrect pressure value in trailer control module Cause: The trailer control module has recorded an implausible value from the pressure sensor when braking. Remarks: ABS warning lamp is on. EBS function without limitations in the vehicle. The control module is not supplied with voltage. Action: Clear fault codes. Renew the trailer control module if the fault code recurs. Check the compressed air lines to the trailer control module. Check the trailer control module for normal operation; when the service brake is not applied, the reading from the pressure sensor should be 0 bar. This value can be read out using Scania Diagnos.
50
1060t21b.mkr
Flash codes
Remarks: ABS warning lamp is on. EBS function without limitations in the vehicle. The trailer control module is not supplied with voltage. Action: Clear fault codes. Renew the trailer control module if the fault code recurs.
1060t21b.mkr
51
Flash codes
Fault: The software in the control unit is not compatible with the trailer control module. Cause: Remarks: ABS warning lamp is on. EBS function without limitations in the vehicle. The trailer control module is not supplied with voltage. Action: Replace the control unit or trailer control module with a unit containing the correct software.
52
1060t21b.mkr
Flash codes
Fault: Internal fault in the trailer control module. Cause: The module has not recorded a sufficiently high air pressure for a long period. A pressure of <4 bar indicates a fault. Remarks: The current pressure is read out using Scania Diagnos 2. ABS warning lamp is on. EBS function without limitations in the vehicle. The trailer control module is not supplied with voltage. Action: Check the function of the trailer control module. Check the compressed air supply to the trailer control module. Renew the trailer control module if the fault persists.
1060t21b.mkr
53
Flash codes
Fault: Internal fault in the trailer control module. Cause: Remarks: ABS warning lamp is on. EBS function without limitations in the vehicle. The trailer control module is not supplied with voltage. Action: Clear the fault code. Check the cables for the trailer control module power supply and earth. Check the cables for the trailer control module CAN communication.
54
1060t21b.mkr
Flash codes
Fault: Internal fault in the trailer control module. Cause: Remarks: ABS warning lamp is on. EBS function without limitations in the vehicle. The trailer control module is not supplied with voltage. Action: Clear the fault code. Check the cables for the trailer control module power supply and earth. Check the cables for the trailer control module CAN communication.
1060t21b.mkr
55
Flash codes
Fault: The system has recorded a too high pressure difference between the trailer control module and the axle control module. Cause: The system has recorded a too high pressure difference between the trailer control module and the concerned control unit in the axle control module. The pressure difference has been >1.2 bar for more than 2.5 seconds. Remarks: ABS warning lamp is on. EBS function without limitations in the vehicle. The trailer control module is not supplied with voltage. Action: Check the function of the trailer control module. Check the compressed air supply to the trailer control module. Renew the trailer control module if the fault persists.
56
1060t21b.mkr
Flash codes
Fault: Interruption in CAN signal to EDC and Retarder. Cause: There has been an interruption in the CAN signal between EBS, EDC and Retarder. Remarks: ABS warning lamp is on. The system is operative, but without engine control function. Action: Check for open or short circuit in the CAN cables between EBS and EDC.
1060t21b.mkr
57
Flash codes
Fault: Response time too long for CAN signal between EBS and EDC. Cause: The EBS control unit has detected that the EDC control unit has not responded to the CAN signal within the specified time. Remarks: ABS warning lamp is on. The system is operative, but without engine control function. Action: Check for open or short circuit in the CAN cable between EBS and EDC. Check the EDC control unit for normal operation.
58
1060t21b.mkr
1060t21b.mkr
59
V83
T12
D39
T11
V82
T13
Electrical components, EBS 2.0 Component No. B50/B51 B52/53 B54/55 B56/57 C8 C56 C92 C93 C94 C95 C98 D39 E43 E46 Component description Brake pad wear wire Brake pad wear wire Brake pad wear wire Brake pad wear wire Connector Terminal block Connector Connector Connector Connector Connector Potentiometer Control unit Trailer sensing unit Axle 1 LH Axle 1 RH axle 2 LH Axle 2 RH For CAN and diagnosis Trailer socket for ABS Circuit 6 42 56 92 161 138 169 14, 34, 64, 84, 103 172 113 109 159
60
1060t22b.mkr
103 113
Component No. G4 G11 G13 G18 O1 P2 R1 S90 S95 T11 T12 T13 T14 T46 T39 T40 T41 T42 V82 V83 V84 V85 W3 W8 W15 W18
Component description Ground terminal Ground terminal Ground terminal Ground terminal Instrument cluster Central electric unit Flasher relay Switch Switch Wheel sensor Wheel sensor Wheel sensor Wheel sensor Pressure sensor Wear sensor Wear sensor Wear sensor Wear sensor Control module Control module Control module Control module Warning lamp Warning lamp Warning lamp Information lamp
Circuit 118, 130 11 150, 172 13, 151 165 117 129 24 27 74 77 103 2 45 52 97 12 31 62 81 153 153 153 134
TC OFFROAD Diagnosis Axle 1 LH Axle 1 RH Axle 2 LH Axle 2 RH Axle 1 LH Axle 1 RH Axle 2 LH Axle 2 RH Axle 1 LH Axle 1 RH Axle 2 LH Axle 2 RH TC ABS/truck ABS/trailer Brake pad wear
1060t22b.mkr
61
Circuit paths 1 - 25
62
1060t22b.mkr
Circuit paths 26 - 50
Circuit paths 51 - 75
1060t22b.mkr
63
64
1060t22b.mkr
1060t22b.mkr
65
E46
V86
T46
C92
V83
T12
D39
T11
T13
Electrical components in EBS Component No. B50/51 B52/53 B54/55 B56/57 B64/65 B66/67 C8 C56 C92 C93 C94 C95 C98 D39 E43 Component description Brake pad wear wire Brake pad wear wire Brake pad wear wire Brake pad wear wire Brake pad wear wire Brake pad wear wire Connector Junction block Connector Connector Connector Connector Connector Potentiometer Control unit Axle 1 LH Axle 1 RH Axle 2 LH Axle 2 RH Axle 3 LH Axle 3 RH For CAN and diagnosis Trailer socket for ABS Circuit path 82 116 135 166 210 194 60 40 68 90, 108 5, 140, 158, 182 68, 73 15 12
66
1060t23b.mkr
108 577
Component No. E46 G4 G11 G13 G18 O1 R1 S90 S95 T11 T12 T13 T14 T28 T30 T39 T40 T41 T42 T46 T51 T52 V82 V83 V84 V85 V86 W3 W8 W15 W18
Component description Electronic unit Ground terminal Ground terminal Ground terminal Ground terminal Instrument cluster Flasher relay Switch Brake pad wear Wheel sensor Wheel sensor Wheel sensor Wheel sensor Wheel sensor Wheel sensor Wear sensor Wear sensor Wear sensor Wear sensor Pressure sensor Wear sensor Wear sensor Control module Control module Control module Control module Control module Warning lamp Warning lamp Warning lamp Warning lamp
Trailer sensing
TC Off Road Flash diagnosis Axle 1 LH Axle 1 RH Axle 2 LH Axle 2 RH Axle 3 LH Axle 3 RH Axle 1 LH Axle 1 RH Axle 2 LH Axle 2 RH air suspension, rear Axle 3 LH Axle 3 RH Axle 1 LH Axle 1 RH Axle 2 LH Axle 2 RH Axle 3 TC ABS/truck ABS/trailer Brake pad wear
Circuit path 60 19, 31 88 49, 72 89 53 66 20 31 97 103 147 154 219 178 79 122 128 172 6 207 197 90 107 137 156 180 53 53 55 36
1060t23b.mkr
67
Wiring diagrams
Circuit paths, EBS 2.1
Circuit paths 1 - 25
68
1060t23b.mkr
Circuit paths 26 - 50
Circuit paths 51 - 75
1060t23b.mkr
69
70
1060t23b.mkr
1060t23b.mkr
71
72
1060t23b.mkr
1060t23b.mkr
73
T51
V83
T12 D39
T88
T11
T39
V82 V48
T13
T41
Electrical components in EBS Component No. C6 C8 C56 C92 C93 C94 C95 D34 D39 E43 E46 G4 G13 G18 Component description Connector Connector Junction block Connector Connector Connector Connector Resistor Potentiometer Control unit Electronic unit Ground terminal Ground terminal Ground terminal Circuit 49 78 4, 10, 14, 22, 27, 33, 38 106 120, 126, 138, 301, 328 163, 178, 213, 238, 278 106 5 53 84 61 95
74
1060t24b.mkr
115 221
T40
T90
T87
T89
Component No. O1 R1 S50 S90 T11 T12 T13 T14 T28 T30 T39 T40 T41 T42 T46 T51 T52 T87 T88 T89 T90 V48 V82 V83 V86 V95 V96 W3 W8 W15 W18
Component description Instrument cluster Flasher relay Switch Switch Wheel sensor Wheel sensor Wheel sensor Wheel sensor Wheel sensor Wheel sensor Wear sensor Wear sensor Wear sensor Wear sensor Pressure sensor Wear sensor Wear sensor Wheel sensor Wheel sensor Wear sensor Wear sensor Trailer control module Control module Control module Control module Control module Control module Warning lamp Warning lamp Warning lamp Warning lamp
Diagnosis TC Off Axle 1 LH Axle 1 RH Axle 2 LH Axle 2 RH Axle 3 LH Axle 3 RH Axle 1 LH Axle 1 RH Axle 2 LH Axle 2 RH Air suspension, rear Axle 3 LH Axle 3 RH Axle 4 LH Axle 4 RH Axle 4 LH Axle 4 RH Axles 1 and 4 LH Axles 1 and 4 RH Tag axle Axles 2 and 3 Axle 3 TC ABS/truck ABS/trailer Brake pad wear
Circuit 96 80 65 61 131, 309 144, 334 156, 230, 258 169, 244, 283 183, 206, 260 185, 219, 285 136, 321 148, 346 161, 236 173, 248 151, 226 196, 211 192, 223 311 336 317 342 121 126, 303 138, 328 178 151, 226, 251, 276 201 98 98 97 77
1060t24b.mkr
75
Wiring diagrams
Circuit paths 1 - 25
76
1060t24b.mkr
Circuit paths 26 - 50
Circuit paths 51 - 75
1060t24b.mkr
77
78
1060t24b.mkr
1060t24b.mkr
79
80
1060t24b.mkr
1060t24b.mkr
81
82
1060t24b.mkr
1060t24b.mkr
83