:  Dec 21, 2007



Principle of Operation

For information on the description and operation of the system, refer to section 206-09A - Anti-Lock Control - Traction Control in the workshop manual.

Many of the functions forming part of the anti-lock braking system (ABS) will communicate with the message center giving information to the driver about the operation of the system overall, which means that there are no real symptoms as such which are not covered by either a message or a diagnostic trouble code (DTC).

For information on the message center, refer to the relevant section in the workshop manual.

Inspection and Verification

. Verify the customer concern.

. Visually inspect for obvious mechanical or electrical faults.

Mechanical Electrical
  • Tire size, condition and installation
  • Wheel speed sensor condition and installation
  • steering angle sensor (SAS) condition and installation
  • Yaw rate sensor and accelerometer condition and installation
  • Hydraulic control unit (with attached ABS module) condition and installation
  • Fuses
  • Harnesses and connectors
  • Warning lamp operation
  • Wheel speed sensors
  • Central junction box
  • HDC switch
  • DSC switch
  • Stop lamp switch
  • Yaw rate sensor and accelerometer
  • steering angle sensor (SAS)
  • ABS module
  • Controller area network (CAN) circuits

. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step

. Use the approved diagnostic system or a scan tool to retrieve any DTCs before moving onto the DTC index.
  Make sure that all DTCs are cleared following rectification.
Make sure that all DTCs are cleared following rectification.

DTC index

:
  Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5 digits from the scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last 2 digits give extra information read by the manufacturer-approved diagnostic system).

DTC Description Possible causes Action
C110501 Brake Lamp Control General electrical failure
  • Brake lamp actuation (BLA) short to Power or ground Harness/connector damaged
Refer to the electrical guides and check harness connection to BLA. Ensure that harness is not shorted to either ground or supply.
C110567 Brake Lamp Control Signal incorrect after event
  • Harness issue
  • Brake lamp/hill decent control relay issue
Check operation of the Brake lamp relay (also known as HDC relay) and correct illumination of the brake lamps. Refer to the electrical guides and check the stop lamp switch and circuits.
C110924 Vehicle Dynamics Control Switch
  • Signal stuck high - DSC Switch operation fault (If the DSC switch is pressed for longer than 1 minute, the switch is deemed to be malfunctioning)
Refer to the electrical guides and check the DSC switch and circuits.
C1A0004 Control Module
  • Vehicle dynamics control module internal failure
Refer to the warranty policy and procedures manual if a module is suspect.
C1A0005 Control Module
  • Vehicle dynamics control module programming failure
Refer to the warranty policy and procedures manual if a module is suspect.
C1A0016 Control Module
  • Vehicle dynamics control module power supply circuit voltage below threshold
  • Harness/connector damaged
  • Charging circuit issue
  • Defective or flat battery
Check vehicle battery and charging system. Refer to the relevant section in the workshop manual. Refer to the electrical guides and check the power supply circuits to the module.
C1A0017 Control Module
  • Vehicle dynamics control module power supply circuit voltage above threshold
  • Charging circuit issue
  • Defective or flat battery
Check the battery voltage and charging system. Refer to the relevant section in the workshop manual. Refer to the electrical guides and check the power supply circuits to the module.
C1A001C Control Module
  • Vehicle dynamics control module power supply circuit voltage out of range
A momentary low voltage occurred, check vehicle battery and charging circuit. Refer to the relevant section in the workshop manual. Refer to the electrical guides and check the power supply circuits to the module.
C1A0041 Control Module
  • Vehicle dynamics control module general checksum failure
Refer to the warranty policy and procedures manual if a module is suspect.
C1A0042 Control Module
  • Vehicle dynamics control module general memory failure
Refer to the warranty policy and procedures manual if a module is suspect.
C1A0043 Control Module
  • Vehicle dynamics control module special memory failure
Refer to the warranty policy and procedures manual if a module is suspect.
C1A0044 Control Module
  • Vehicle dynamics control module data memory failure
Refer to the warranty policy and procedures manual if a module is suspect.
C1A0045 Control Module
  • Vehicle dynamics control module program memory failure
Clear the DTC and retest. If the problem reset after several attempts, renew the modulator. Refer to the warranty policy and procedures manual if a module is suspect.
C1A0046 Control Module
  • Incorrect car configuration file (CCF) data received from instrument pack cluster (IPC) or CCF incorrectly configured.
  • Modulator installed to unrecognized vehicle configuration
  • Vehicle dynamics control module calibration/parameter memory failure (internal error)
Configure the module using the approved diagnostic system. Clear the DTC and check if the DTC resets after ignition reset following >10 seconds ignition on. If the above is correct and the DTC persists, renew the modulator. Refer to the warranty policy and procedures manual if a module is suspect.
C1A0047 Control Module
  • Vehicle dynamics control module watchdog/safety microprocessor failure
Refer to the warranty policy and procedures manual if a module is suspect.
C1A0048 Control Module
  • Vehicle dynamics control module supervision software failure
Configure the module using the approved diagnostic system.
C1A0049 Control Module
  • Vehicle dynamics control module internal electronic failure
Refer to the warranty policy and procedures manual if a module is suspect.
C1A004A Control Module
  • Vehicle dynamics control module incorrect component installed
  • New modulator installed/not yet configured
Configure the module using the approved diagnostic system.
C1A004B Control Module
  • Vehicle dynamics control module over temperature
Allow the unit to cool, clear the DTC and retest. Do not renew the modulator as this is a protection function to ensure no valve damage occurs. The DTC may be set if the service tool diagnostic tester requests long periods of valve control.
C1A0062 Control Module
  • Vehicle dynamics control module signal compare failure
Refer to the warranty policy and procedures manual if a module is suspect.
C1A0063 Control Module
  • Vehicle dynamics control module component protection time-out
Refer to the warranty policy and procedures manual if a module is suspect.
C1A0064 Control Module
  • Vehicle dynamics control module signal plausibility failure
Refer to the warranty policy and procedures manual if a module is suspect.
C1A0068 Control Module
  • Vehicle dynamics control module event information
Check for an un-calibrated steering angle sensor, defective steering angle sensor, defective wheel speed sensor, defective yaw rate/lateral acceleration sensor. Rectify as necessary. Clear the DTC and retest.
C1A0088 Control Module
  • CAN bus off
  • CAN bus harness /wiring damaged
  • Incorrect CAN Master Config ID information from instrument pack
Refer to the Network Communications section in the workshop manual.
C1A7601 Valve Relay
  • Modulator internal fault
Refer to the warranty policy and procedures manual if a module is suspect.
C1A7604 Valve Relay
  • Modulator valve relay circuit internal failures
Refer to the warranty policy and procedures manual if a module is suspect.
C1A7716 Valve Relay Supply Circuit Circuit voltage below threshold
  • Fuse
  • Harness/connector damaged
Refer to the electrical guides and check the harness connection to the valve relay circuits.
C1A7804 Left Front Inlet Valve
  • Modulator internal fault
Refer to the warranty policy and procedures manual if a module is suspect.
C1A7809 Left Front Inlet Valve
  • Modulator internal fault
Refer to the warranty policy and procedures manual if a module is suspect.
C1A7904 Left Front Outlet Valve
  • Modulator internal fault
Refer to the warranty policy and procedures manual if a module is suspect.
C1A8004 Right Front Inlet Valve
  • Modulator internal fault
Refer to the warranty policy and procedures manual if a module is suspect.
C1A8104 Right Front Outlet Valve
  • Modulator internal fault
Refer to the warranty policy and procedures manual if a module is suspect.
C1A8204 Left Rear Inlet Valve
  • Modulator internal fault
Refer to the warranty policy and procedures manual if a module is suspect.
C1A8209 Left Rear Inlet Valve
  • Modulator internal fault
Refer to the warranty policy and procedures manual if a module is suspect.
C1A8304 Left Rear Outlet Valve
  • Modulator internal fault
Refer to the warranty policy and procedures manual if a module is suspect.
C1A8404 Right Rear Inlet Valve
  • Modulator internal fault
Refer to the warranty policy and procedures manual if a module is suspect.
C1A8504 Right Rear Outlet Valve
  • Modulator internal fault
Refer to the warranty policy and procedures manual if a module is suspect.
C1A8604 Commutation Valve # 1
  • Modulator internal fault
Refer to the warranty policy and procedures manual if a module is suspect.
C1A8609 Commutation Valve # 1
  • Modulator internal fault
Refer to the warranty policy and procedures manual if a module is suspect.
C1A8704 Commutation Valve # 2
  • Modulator internal fault
Refer to the warranty policy and procedures manual if a module is suspect.
C1A8804 High Pressure Switching Valve #1
  • Modulator internal fault
Refer to the warranty policy and procedures manual if a module is suspect.
C1A8904 High Pressure Switching Valve #2
  • Modulator internal fault
Refer to the warranty policy and procedures manual if a module is suspect.
C1A9012 Wheel Speed Sensor Supply
  • Wheel speed sensor supply circuit short circuit to power Harness/connector issue Sensor failure
Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9113 Left Front Wheel Speed Sensor
  • Wheel speed sensor circuit high resistance Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9125 Left Front Wheel Speed Sensor
  • Signal shape/waveform failure Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Test the vehicle to a speed greater than 20km/h (12.5mph) to confirm the success of any repair. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A912F Left Front Wheel Speed Sensor
  • Signal erratic Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Test the vehicle to a speed greater than 20km/h (12.5mph) to confirm the success of any repair. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9136 Left Front Wheel Speed Sensor
  • Signal frequency too low Harness/connector issue Incorrect mounting of sensor Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9138 Left Front Wheel Speed Sensor
  • Signal frequency incorrect Tone ring tooth missing or damaged
Remove the sensor and visually inspect the sensor ring on the constant velocity joint (CVJ) for missing or damaged teeth. If the sensor ring is damaged, renew the CVJ. Refer to the guided diagnostic routine for this code on the approved diagnostic system. Test the vehicle to a speed greater than 20km/h (12.5mph) to confirm the success of any repair.
C1A9162 Left Front Wheel Speed Sensor
  • Signal compare failure Incorrect wheel or tire size installed Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Test the vehicle to a speed greater than 20km/h (12.5mph) to confirm the success of any repair. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9164 Left Front Wheel Speed Sensor
  • Signal plausibility failure Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Test the vehicle to a speed greater than 20km/h (12.5mph) to confirm the success of any repair. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9165 Left Front Wheel Speed Sensor
  • Signal has too few transitions/events Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9178 Left Front Wheel Speed Sensor
  • Sensor alignment incorrect
  • Sensor air gap incorrect
Check the wheel speed sensor installation. Refer to the relevant section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9213 Left Rear Wheel Speed Sensor
  • Wheel speed sensor circuit high resistance Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9225 Left Rear Wheel Speed Sensor
  • Signal shape/waveform failure Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Test the vehicle to a speed greater than 20km/h (12.5mph) to confirm the success of any repair. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A922F Left Rear Wheel Speed Sensor
  • Signal erratic Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Test the vehicle to a speed greater than 20km/h (12.5mph) to confirm the success of any repair. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9236 Left Rear Wheel Speed Sensor
  • Signal frequency too low Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9238 Left Rear Wheel Speed Sensor
  • Signal frequency incorrect Tone ring tooth missing or damaged
Remove the sensor and visually inspect the sensor ring on the constant velocity joint (CVJ) for missing or damaged teeth. If the sensor ring is damaged, renew the CVJ. Refer to the guided diagnostic routine for this code on the approved diagnostic system. Test the vehicle to a speed greater than 20km/h (12.5mph) to confirm the success of any repair.
C1A9262 Left Rear Wheel Speed Sensor
  • Signal compare failure Incorrect wheel or tire size installed Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Test the vehicle to a speed greater than 20km/h (12.5mph) to confirm the success of any repair. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9264 Left Rear Wheel Speed Sensor
  • Signal plausibility failure Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Test the vehicle to a speed greater than 20km/h (12.5mph) to confirm the success of any repair. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9265 Left Rear Wheel Speed Sensor
  • Signal has too few transitions/events Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9278 Left Rear Wheel Speed Sensor
  • Sensor alignment incorrect
  • Sensor air gap incorrect
Check the wheel speed sensor installation. Refer to the relevant section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system
C1A9313 Right Rear Wheel Speed Sensor
  • Wheel speed sensor circuit high resistance Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9325 Right Rear Wheel Speed Sensor
  • Signal shape/waveform failure Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Test the vehicle to a speed greater than 20km/h (12.5mph) to confirm the success of any repair. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A932F Right Rear Wheel Speed Sensor
  • Signal erratic Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Test the vehicle to a speed greater than 20km/h (12.5mph) to confirm the success of any repair. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9336 Right Rear Wheel Speed Sensor
  • Signal frequency too low Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9338 Right Rear Wheel Speed Sensor
  • Signal frequency incorrect Tone ring tooth missing or damaged
Remove the sensor and visually inspect the sensor ring on the constant velocity joint (CVJ) for missing or damaged teeth. If the sensor ring is damaged, renew the CVJ. Refer to the guided diagnostic routine for this code on the approved diagnostic system. Test the vehicle to a speed greater than 20km/h (12.5mph) to confirm the success of any repair.
C1A9362 Right Rear Wheel Speed Sensor
  • Signal compare failure Incorrect wheel or tire size installed Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Test the vehicle to a speed greater than 20km/h (12.5mph) to confirm the success of any repair. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9364 Right Rear Wheel Speed Sensor
  • Signal plausibility failure Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Test the vehicle to a speed greater than 20km/h (12.5mph) to confirm the success of any repair. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9365 Right Rear Wheel Speed Sensor
  • Signal has too few transitions/events Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9378 Right Rear Wheel Speed Sensor
  • Sensor alignment incorrect
  • Sensor air gap incorrect
Check the wheel speed sensor installation. Refer to the relevant section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system
C1A9413 Right Front Wheel Speed Sensor
  • Wheel speed sensor circuit high resistance Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9425 Right Front Wheel Speed Sensor
  • Signal shape/waveform failure Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Test the vehicle to a speed greater than 20km/h (12.5mph) to confirm the success of any repair. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A942F Right Front Wheel Speed Sensor
  • Signal erratic Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Test the vehicle to a speed greater than 20km/h (12.5mph) to confirm the success of any repair. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9436 Right Front Wheel Speed Sensor
  • Signal frequency too low Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9438 Right Front Wheel Speed Sensor
  • Signal frequency incorrect Tone ring tooth missing or damaged
Remove the sensor and visually inspect the sensor ring on the constant velocity joint (CVJ) for missing or damaged teeth. If the sensor ring is damaged, renew the CVJ. Refer to the guided diagnostic routine for this code on the approved diagnostic system. Test the vehicle to a speed greater than 20km/h (12.5mph) to confirm the success of any repair.
C1A9462 Right Front Wheel Speed Sensor
  • Signal compare failure Incorrect wheel or tire size installed Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Test the vehicle to a speed greater than 20km/h (12.5mph) to confirm the success of any repair. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9464 Right Front Wheel Speed Sensor
  • Signal plausibility failure Harness/connector issue Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Test the vehicle to a speed greater than 20km/h (12.5mph) to confirm the success of any repair. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9465 Right Front Wheel Speed Sensor
  • Signal has too few transitions/events Sensor failure
Check the wheel speed sensor and refer to the electrical guides to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9478 Right Front Wheel Speed Sensor
  • Sensor alignment incorrect
  • Sensor air gap incorrect
Check the wheel speed sensor installation. Refer to the relevant section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system
C1A954A Wheel Speed Sensor
  • The incorrect wheel speed sensor has been installed
Check the wheel speed sensors. Clear the DTC and retest.
C1A9562 Wheel Speed Sensor
  • Signal compare failure Wheel speed sensor rotation plausibility
A wheel speed sensor is installed in the reverse direction. Check the wheel speed sensors for correct installation.
C1A9564 Wheel Speed Sensor
  • Signal plausibility failure Wheel speed sensor fault (any) Sensor ring damaged, incorrect or defective Harness fault
  • Incorrect wheel/tire assembly size
Check for correct wheel/tire sizes. Check the wheel speed sensors and circuits. Remove the sensor and visually inspect the sensor ring on the constant velocity joint (CVJ) for missing or damaged teeth. If the sensor ring is damaged, renew the CVJ. Renew sensors as necessary. Refer to the relevant section in the workshop manual.
C1A9613 Brake Light Switch
  • Stop lamp switch circuit high resistance Harness/connector issue
Check the stop lamp function. Refer to the electrical guides and check the stop lamp switch circuit, rectify as necessary.
C1A9624 Brake Light Switch
  • Stop lamp switch circuit short circuit to power Harness/connector issue
  • Stop lamp switch fault
  • Incorrect stop lamp switch mounting
Check the Stop lamp function. Refer to the electrical guides and check the Stop lamp switch circuit, rectify as necessary.
C1A9662 Brake Light Switch
  • Signal compare failure - Incorrect switching order of the two brake switch poles Harness/connector issue
  • Stop lamp switch fault
Check the stop lamp function. Refer to the electrical guides and check the stop lamp switch circuit, rectify as necessary.
C1A9664 Brake Light Switch
  • Signal plausibility failure Harness/connector issue
  • Stop lamp switch fault
  • Internal modulator issue
Check the Stop lamp function. Refer to the electrical guides and check the Stop lamp switch circuit, rectify as necessary. If the switch and circuits are okay, suspect an internal modulator fault. Refer to the warranty policy and procedures manual if a module is suspect.
C1A9724 Lateral Accelerometer
  • Signal stuck high Yaw rate/lateral acceleration sensor internal error
Check the combined lateral acceleration/yaw rate sensor installation. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/renew as necessary. Refer to the relevant section of the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9727 Lateral Accelerometer
  • Signal rate of change above threshold Harness/connector issue Yaw rate/lateral acceleration sensor internal error
Check the combined lateral acceleration/yaw rate sensor installation. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/renew as necessary. Refer to the relevant section of the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9728 Lateral Accelerometer
  • Signal bias level out of range/internal zero adjustment failure Yaw rate/lateral acceleration sensor internal error
Check the combined lateral acceleration/yaw rate sensor installation. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/renew as necessary. Refer to the relevant section of the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9729 Lateral Accelerometer
  • Signal invalid Yaw rate/lateral acceleration sensor internal error
Check the combined lateral acceleration/yaw rate sensor installation. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/renew as necessary. Refer to the relevant section of the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9749 Lateral Accelerometer
  • Internal electronic failure Possible open circuit on sensor harness connector, AY pin Yaw rate/lateral acceleration sensor internal error
Check the combined lateral acceleration/yaw rate sensor installation. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/renew as necessary. Refer to the relevant section of the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9764 Lateral Accelerometer
  • Signal plausibility failure Yaw rate/lateral acceleration sensor internal error
Check the combined lateral acceleration/yaw rate sensor installation. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/renew as necessary. Refer to the relevant section of the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9786 Lateral Accelerometer
  • Signal invalid Signal circuit high resistance Signal circuit short circuit to ground Signal circuit short circuit to power Yaw rate/lateral acceleration sensor internal error
Check the combined lateral acceleration/yaw rate sensor installation. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/renew as necessary. Refer to the relevant section of the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9796 Lateral Accelerometer
  • Component internal failure Yaw rate/lateral acceleration sensor internal error
Check the combined lateral acceleration/yaw rate sensor installation. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/renew as necessary. Refer to the relevant section of the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9801 Yaw Rate Sensor
  • General electrical failure Reference circuit high resistance (DRSR pin) Reference circuit short circuit to ground (DRSR pin) Reference circuit short circuit to power (DRSR pin) Yaw rate/lateral acceleration sensor internal error
Check the combined lateral acceleration/yaw rate sensor installation. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/renew as necessary. Refer to the relevant section of the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9822 Yaw Rate Sensor
  • Signal amplitude greater than specified maximum Yaw rate/lateral acceleration sensor internal error Un-calibrated steering angle sensor Defective steering angle sensor
Check the combined lateral acceleration/yaw rate sensor installation. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/renew as necessary. Refer to the relevant section of the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9827 Yaw Rate Sensor
  • Signal rate of change above threshold Yaw rate/lateral acceleration sensor internal error
Check the combined lateral acceleration/yaw rate sensor installation. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/renew as necessary. Refer to the relevant section of the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9828 Yaw Rate Sensor
  • Signal bias level out of range/internal zero adjustment failure Yaw rate/lateral acceleration sensor internal error
Check the combined lateral acceleration/yaw rate sensor installation. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/renew as necessary. Refer to the relevant section of the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9829 Yaw Rate Sensor
  • Signal invalid Yaw rate/lateral acceleration sensor internal error
Check the combined lateral acceleration/yaw rate sensor installation. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/renew as necessary. Refer to the relevant section of the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9861 Yaw Rate Sensor
  • Signal calculation failure Yaw rate/lateral acceleration sensor internal error Un-calibrated steering angle sensor Defective steering angle sensor
Check the combined lateral acceleration/yaw rate sensor installation. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/renew as necessary. Refer to the relevant section of the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9862 Yaw Rate Sensor
  • Signal compare failure Yaw rate/lateral acceleration sensor internal error Un-calibrated steering angle sensor Defective steering angle sensor
Check the combined lateral acceleration/yaw rate sensor installation. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/renew as necessary. Refer to the relevant section of the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9864 Yaw Rate Sensor
  • Signal plausibility failure Yaw rate/lateral acceleration sensor internal error Un-calibrated steering angle sensor Defective steering angle sensor
Check the combined lateral acceleration/yaw rate sensor installation. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/renew as necessary. Refer to the relevant section of the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9886 Yaw Rate Sensor
  • Signal invalid Signal circuit high resistance (DRSS pin) Signal circuit short circuit to ground (DRSS pin) Signal circuit short circuit to power (DRSS pin) Yaw rate/lateral acceleration sensor internal error
Check the combined lateral acceleration/yaw rate sensor installation. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/renew as necessary. Refer to the relevant section of the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9892 Yaw Rate Sensor
  • Performance or incorrect operation Check that the sensor is correctly oriented Yaw rate/lateral acceleration sensor internal error
Check the combined lateral acceleration/yaw rate sensor installation. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/renew as necessary. Refer to the relevant section of the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system. A drive test is required before the Instrument pack lamps will be cleared.
C1A9901 Pressure Sensor
  • General electrical failure Internal modulator error
Renew ABS modulator. Refer to the warranty policy and procedures manual if a module is suspect.
C1A9929 Pressure Sensor
  • Signal invalid Internal modulator error
Renew ABS modulator. Refer to the warranty policy and procedures manual if a module is suspect.
C1A9949 Pressure Sensor
  • Internal electronic failure Internal modulator error
Renew ABS modulator. Refer to the warranty policy and procedures manual if a module is suspect.
C1A9964 Pressure Sensor
  • Signal plausibility failure Internal modulator error
Renew ABS modulator. Refer to the warranty policy and procedures manual if a module is suspect.
C1B0027 steering angle sensor
  • Signal rate of change above threshold Un-calibrated steering angle sensor steering angle sensor issue
Check for steering angle sensor DTCs. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1B0029 steering angle sensor
  • Signal invalid Un-calibrated steering angle sensor steering angle sensor issue
Check for steering angle sensor DTCs. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1B0061 steering angle sensor
  • Signal calculation failure Un-calibrated steering angle sensor steering angle sensor issue
Check for steering angle sensor DTCs. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1B0064 steering angle sensor
  • Signal plausibility failure Un-calibrated steering angle sensor steering angle sensor issue
Check for steering angle sensor DTCs. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1B0092 steering angle sensor
  • Performance or incorrect operation Un-calibrated steering angle sensor steering angle sensor issue
Check for steering angle sensor DTCs. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1B0201 Return Pump
  • Return pump circuit general electrical failure Internal modulator error
Renew ABS modulator. Refer to the warranty policy and procedures manual if a module is suspect.
C1B0216 Return Pump
  • Return pump circuit voltage below threshold Harness / wiring damaged Defective fuse
Refer to the electrical guides and check the harness and fuses to the module and rectify as necessary.
C1B0249 Return Pump
  • Internal electronic failure Internal modulator error
Renew ABS modulator. Refer to the warranty policy and procedures manual if a module is suspect.
C1B2224 Hill Descent Switch
  • Signal stuck high If the HDC switch is pressed for longer than 1 minute, this DTC may be logged. Harness/connector issue
Refer to the electrical guides and check the switch and circuit for short to power. Check the operation of the HDC switch and rectify/renew as necessary.
U010087 Lost Communication With ECM/PCM "A"
  • CAN bus fault
  • ECM disconnected
  • ECM not configured
  • ECM failure
  • Harness/connector issue
Check the ECM installation/configuration. Refer to the Network Communications section in the workshop manual.
U010187 Lost Communication with TCM
  • CAN bus fault
  • TCM disconnected
  • TCM not configured
  • TCM failure
  • Harness/connector issue
Check the TCM installation/configuration. Refer to the Network Communications section in the workshop manual.
U010287 Lost Communication with Transfer Case Control Module
  • CAN bus fault
  • TCCM disconnected
  • TCCM not configured
  • TCCM failure
  • Harness/connector issue
Check the TCCM installation/configuration. Refer to the Network Communications section in the workshop manual.
U010487 Lost Communication With Cruise Control Module
  • CAN bus fault
  • Cruise control module disconnected
  • Cruise control module not configured
  • Cruise control module failure
  • Harness/connector issue
Check the control module installation/configuration. Refer to the Network Communications section in the workshop manual.
U012687 Lost Communication With steering angle sensor Module
  • CAN bus fault
  • steering angle sensor module disconnected
  • steering angle sensor module not configured
  • steering angle sensor module failure
  • Harness/connector issue
Check the control module installation/configuration. Refer to the Network Communications section in the workshop manual.
U012887 Lost Communication With Park Brake Control Module
  • CAN bus fault
  • PBM disconnected
  • PBM not configured
  • PBM failure
  • Harness/connector issue
Check the control module installation/configuration. Refer to the Network Communications section in the workshop manual.
U013287 Lost Communication With Suspension Control Module "A"
  • CAN bus fault
  • RLM disconnected
  • RLM not configured
  • RLM failure
  • Harness/connector issue
Check the control module installation/configuration. Refer to the Network Communications section in the workshop manual.
U013387 Lost Communication With Active Roll Control Module
  • CAN bus fault
  • ARC disconnected
  • ARC not configured
  • ARC failure
  • Harness/connector issue
Check the control module installation/configuration. Refer to the Network Communications section in the workshop manual.
U013687 Lost Communication With Differential Control Module - Rear
  • CAN bus fault
  • RDCM disconnected
  • RDCM not configured
  • RDCM failure
  • Harness/connector issue
Check the control module installation/configuration. Refer to the Network Communications section in the workshop manual.
U013887 Lost Communication with All Terrain Control Module
  • CAN bus fault
  • ATCM disconnected
  • ATCM not configured
  • ATCM failure
  • Harness/connector issue
Check the control module installation/configuration. Refer to the Network Communications section in the workshop manual.
U015587 Lost Communication With Instrument Panel Cluster (IPC) Control Module
  • CAN bus fault
  • IPC disconnected
  • IPC not configured
  • IPC failure
  • Harness/connector issue
Check the control module installation/configuration. Refer to the Network Communications section in the workshop manual.
U040168 Invalid Data Received from ECM/PCM A
  • Event information
Check for engine management DTCs. Refer to the relevant section in the workshop manual.
U040268 Invalid Data Received from TCM
  • Event information
Check for transmission DTCs. Refer to the relevant section in the workshop manual.
U040368 Invalid Data Received From Transfer Case Control Module
  • Event information
Check for transfer case DTCs. Refer to the relevant section in the workshop manual.
U040568 Invalid Data Received From Cruise Control Module
  • Event information
Check for cruise control DTCs. Refer to the relevant section in the workshop manual.
U041768 Invalid Data Received From Park Brake Control Module
  • Event information
Check for parking brake DTCs. Refer to the relevant section in the workshop manual.
U042168 Invalid Data Received from Suspension Control Module A
  • Event information
Check for dynamic suspension DTCs. Refer to the relevant section in the workshop manual.
U042468 Invalid Data Received From HVAC Control Module
  • Event information
Ignore this DTC.
U042868 Invalid Data Received From steering angle sensor Module
  • Event information
Check the steering angle sensor and circuits. Refer to the electrical guides. Test the vehicle on roads requiring varying steering input to confirm the success of any repair.
U1A4968 Invalid Data Received From All Terrain Control Module
  • Event information
Check for all-terrain DTCs. Refer to the relevant section in the workshop manual.
U1A4A68 Invalid Data Received From Differential Control Module - Rear
  • Event information
Check for RDCM DTCs. Refer to the relevant section in the workshop manual.
U200168 Reduced System Function
  • Event information Not a fault condition. System operation suspended while system cools. Customer may have seen the warning lamp illuminated during a period of reduced functionality or may have noticed the vehicle behaving differently in relation to a traction control event.
This Event is triggered if the ECU reduces the level of functionality, to prevent over heating of the foundation brakes. It is a normal function of the ECU and is not a fault. Clear/ignore this DTC.