Anti-Lock Braking System (ABS)

WARNING: This page is about a different car, the 2011 Jaguar XKR, 2011 Jaguar XK, 2010 Jaguar XKR, and 2010 Jaguar XK. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor vehicle

When probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part number 3548-1358-00

NOTE: If the control module or a component is suspect and the vehicle remains under manufacturer warranty, refer to the warranty policy and procedures manual (section B1.2), or determine if any prior approval programme is in operation, prior to the installation of a new module/component

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)

When performing voltage or resistance tests, always use a digital multimeter accurate to three decimal places and with a current calibration certificate. When testing resistance, always take the resistance of the digital multimeter leads into account

Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests

Inspect connectors for signs of water ingress, and pins for damage and/or corrosion

If diagnostic trouble codes are recorded and, after performing the pinpoint tests, a fault is not present, an intermittent concern may be the cause. Always check for loose connections and corroded terminals

Where an 'on demand self-test' is referred to, this can be accessed via the 'diagnostic trouble code monitor' tab on the manufacturers approved diagnostic system

The table below lists all Diagnostic Trouble Codes (DTCs) that could be logged in the anti-lock braking system module, for additional diagnosis and testing information. For additional information, refer to ANTI-LOCK CONTROL - STABILITY ASSIST .

DTC	Description	Possible Cause	Action
C0021-09	Brake Booster Performance	No vacuum available from engine due to split/leaking hose etc. Brake booster servo has failed due to lack of vacuum	Check integrity of brake booster vacuum hose. Check and install a new brake booster as required
C0030-38	Left Front Tone Wheel - signal frequency incorrect	Left front magnetic pulse ring damaged/contaminated Incorrect component installed * Sensor internal fault	Check the left front magnetic pulse ring for damage or contamination. Clean or replace as required. If no damage/contamination found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair and extinguish the lamps, the vehicle needs to be driven above 9mph/15kph for more than 10 seconds
C0031-12	Left Front Wheel Speed Sensor - short to battery	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for short to power. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C0031-14	Left Front Wheel Speed Sensor - circuit short to ground or open	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for short to ground or open circuit. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C0031-25	Left Front Wheel Speed Sensor - signal shape/waveform failure	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for partial or intermittently grounded signal circuit. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair and extinguish the lamps, the vehicle needs to be driven above 9mph/15kph
C0031-2F	Left Front Wheel Speed Sensor -signal erratic	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for intermittent short to power, ground or open circuit. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair and extinguish the lamps, the vehicle needs to be driven above 9mph/15kph
C0031-31	Left Front Wheel Speed Sensor - no signal	Electrical wiring harness fault Magnetic pulse ring de-magnetised or damaged Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for open circuit or high resistance. Check connectors for damage or corrosion. Check the wheel speed sensor for correct location and contamination. Check the magnetic pulse wheel for contamination, damage or de-magnetisation. Clean or replace the sensor or wheel bearing as required. Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair and extinguish the lamps, the vehicle needs to be driven above 9mph/15kph
C0031-62	Left Front Wheel Speed Sensor - signal compare failure	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for intermittent short to power, ground or open circuit. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair and extinguish the lamps, the vehicle needs to be driven above 9mph/15kph
C0031-64	Left Front Wheel Speed Sensor - signal plausibility failure	Incorrect wheels/tyres installed Electrical wiring harness fault EMC influences on left front wheel speed sensor and supply line Magnetic pulse wheel damaged/contaminated, de-magnetised Sensor internal fault	Check the correct wheels and tyres are installed. Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for intermittent short to power, or ground. Check for EMC influences on the speed sensor and circuits. Check magnetic pulse wheel for damage/contamination and de-magnetisation. Repair Wiring harness, install a new sensor or wheel bearing as required. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C0032-11	Left Front wheel Speed Sensor Supply - circuit short to ground	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for short to ground. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C0033-38	Right Front Tone Wheel - signal frequency incorrect	Right front magnetic pulse ring damaged/contaminated Incorrect component installed * Sensor internal fault	Check the right front magnetic pulse ring for damage or contamination. Clean or replace as required. If no damage/contamination found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair and extinguish the lamps, the vehicle needs to be driven above 9mph/15kph for more than 10 seconds
C0034-12	Right Front Wheel Speed Sensor - short to battery	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for short to power. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C0034-14	Right Front Wheel Speed Sensor - circuit short to ground or open	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for short to ground or open circuit. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C0034-25	Right Front Wheel Speed Sensor - signal shape/waveform failure	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for partial or intermittently grounded signal circuit. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair and extinguish the lamps, the vehicle needs to be driven above 9mph/15kph
C0034-2F	Right Front Wheel Speed Sensor -signal erratic	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for intermittent short to power, ground or open circuit. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair and extinguish the lamps, the vehicle needs to be driven above 9mph/15kph
C0034-31	Right Front Wheel Speed Sensor - no signal	Electrical wiring harness fault Magnetic pulse ring de-magnetised or damaged Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for open circuit or high resistance. Check connectors for damage or corrosion. Check the wheel speed sensor for correct location and contamination. Check the magnetic pulse wheel for contamination, damage or de-magnetisation. Clean or replace the sensor or wheel bearing as required. Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair and extinguish the lamps, the vehicle needs to be driven above 9mph/15kph
C0034-62	Right Front Wheel Speed Sensor - signal compare failure	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for intermittent short to power, ground or open circuit. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair and extinguish the lamps, the vehicle needs to be driven above 9mph/15kph
C0034-64	Right Front Wheel Speed Sensor - signal plausibility failure	Incorrect wheels/tyres installed Electrical wiring harness fault EMC influences on right front wheel speed sensor and supply line Magnetic pulse wheel damaged/contaminated, de-magnetised Sensor internal fault	Check the correct wheels and tyres are installed. Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for intermittent short to power, or ground. Check for EMC influences on the speed sensor and circuits. Check magnetic pulse wheel for damage/contamination and de-magnetisation. Repair wiring harness, install a new sensor or wheel bearing as required. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C0035-11	Right Front Wheel Speed Sensor Supply - circuit short to ground	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for short to ground. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C0036-38	Left Rear Tone Wheel - signal frequency incorrect	Left rear magnetic pulse ring damaged/contaminated Incorrect component installed * Sensor internal fault	Check the left rear magnetic pulse ring for damage or contamination. Clean or replace as required. If no damage/contamination found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair and extinguish the lamps, the vehicle needs to be driven above 9mph/15kph for more than 10 seconds
C0037-12	Left Rear Wheel Speed Sensor - short to battery	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for short to power. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C0037-14	Left Rear Wheel Speed Sensor - circuit short to ground or open	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for short to ground or open circuit. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C0037-25	Left Rear Wheel Speed Sensor - signal shape/waveform failure	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for partial or intermittently grounded signal circuit. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair and extinguish the lamps, the vehicle needs to be driven above 9mph/15kph
C0037-2F	Left Rear Wheel Speed Sensor -signal erratic	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for intermittent short to power, ground or open circuit. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair and extinguish the lamps, the vehicle needs to be driven above 9mph/15kph
C0037-31	Left Rear Wheel Speed Sensor - no signal	Electrical wiring harness fault Magnetic pulse ring de-magnetised or damaged Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for open circuit or high resistance. Check connectors for damage or corrosion. Check the wheel speed sensor for correct location and contamination. Check the magnetic pulse wheel for contamination, damage or de-magnetisation. Clean or replace the sensor or wheel bearing as required. Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair and extinguish the lamps, the vehicle needs to be driven above 9mph/15kph
C0037-62	Left Rear Wheel Speed Sensor - signal compare failure	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for intermittent short to power, ground or open circuit. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair and extinguish the lamps, the vehicle needs to be driven above 9mph/15kph
C0037-64	Left Rear Wheel Speed Sensor - signal plausibility failure	Incorrect wheels/tyres installed Electrical wiring harness fault EMC influences on left rear wheel speed sensor and supply line Magnetic pulse wheel damaged/contaminated, de-magnetised Sensor internal fault	Check the correct wheels and tyres are installed. Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for intermittent short to power, or ground. Check for EMC influences on the speed sensor and circuits. Check magnetic pulse wheel for damage/contamination and de-magnetisation. Repair Wiring harness, install a new sensor or wheel bearing as required. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C0038-11	Left Rear Wheel Speed Sensor Supply - circuit short to ground	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for short to ground. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C0039-38	Right Rear Tone Wheel - signal frequency incorrect	Right rear magnetic pulse ring damaged/contaminated Incorrect component installed Sensor internal fault	Check the right rear magnetic pulse ring for damage or contamination. Clean or replace as required.. If no damage/contamination found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair and extinguish the lamps, the vehicle needs to be driven above 9mph/15kph for more than 10 seconds
C003A-12	Right Rear Wheel Speed Sensor - short to battery	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for short to power. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C003A-14	Right Rear Wheel Speed Sensor - circuit short to ground or open	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for short to ground or open circuit. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C003A-25	Right Rear Wheel Speed Sensor - signal shape/waveform failure	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for partial or intermittently grounded signal circuit. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair and extinguish the lamps, the vehicle needs to be driven above 9mph/15kph
C003A-2F	Right Rear Wheel Speed Sensor -signal erratic	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for intermittent short to power, ground or open circuit. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair and extinguish the lamps, the vehicle needs to be driven above 9mph/15kph
C003A-31	Right Rear Wheel Speed Sensor - no signal	Electrical wiring harness fault Magnetic pulse ring de-magnetised or damaged Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for open circuit or high resistance. Check connectors for damage or corrosion. Check the wheel speed sensor for correct location and contamination. Check the magnetic pulse wheel for contamination, damage or de-magnetisation. Clean or replace the sensor or wheel bearing as required. Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair and extinguish the lamps, the vehicle needs to be driven above 9mph/15kph
C003A-62	Right Rear Wheel Speed Sensor - signal compare failure	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for intermittent short to power, ground or open circuit. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair and extinguish the lamps, the vehicle needs to be driven above 9mph/15kph
C003A-64	Right Rear Wheel Speed Sensor - signal plausibility failure	Incorrect wheels/tyres installed Electrical wiring harness fault EMC influences on left rear wheel speed sensor and supply line Magnetic pulse wheel damaged/contaminated, de-magnetised Sensor internal fault	Check the correct wheels and tyres are installed. Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for intermittent short to power, or ground. Check for EMC influences on the speed sensor and circuits. Check magnetic pulse wheel for damage/contamination and de-magnetisation. Repair Wiring harness, install a new sensor or wheel bearing as required. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C003B-11	Right Rear Wheel Speed Sensor Supply - circuit short to ground	Electrical wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the wheel speed sensor circuit for short to ground. Repair harness as required. If no harness fault found, suspect wheel speed sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C0047-16	Brake Booster Pressure Sensor - circuit voltage below threshold	Brake booster pressure sensor supply circuit - voltage below threshold HCU failure	Carry out any pinpoint test associated with this DTC using the manufacturer approved diagnostic system. Refer to the electrical circuit diagrams and check brake booster pressure sensor power supply for short to ground. Check and install a new HCU as required, refer to the new module/component installation note at the top of the DTC Index
C0047-1C	Brake Booster Pressure Sensor - circuit voltage out of range	Brake booster pressure sensor supply circuit - voltage out of range 4.5v-5.3v Brake booster pressure sensor failure HCU failure	Carry out any pinpoint test associated with this DTC using the manufacturer approved diagnostic system. Refer to the electrical circuit diagrams and check brake booster pressure sensor power supply for short, high resistance. Establish if sensor or HCU is at fault. Check and install a new brake booster pressure sensor or HCU as required, refer to the new module/component installation note at the top of the DTC Index
C0047-29	Brake Booster Pressure Sensor - signal invalid	Brake booster pressure sensor signal 1 circuit - short to ground, power, open circuit Brake booster pressure sensor signal 2 circuit - short to ground, power, open circuit Brake booster pressure sensor failure	Carry out any pinpoint test associated with this DTC using the manufacturer approved diagnostic system. Refer to the electrical circuit diagrams and check brake booster signal 1 and 2 circuits for short to ground, power, open circuit. Clear DTC and re-test. If DTC remains, suspect the brake booster pressure sensor, check and install a new sensor as required, refer to the new module/component installation note at the top of the DTC Index. To validate the repair and extinguish the lamps, start the engine and apply the foot brake
C0047-62	Brake Booster Pressure Sensor - signal compare failure	NOTE: Fault detected during braking event Brake booster pressure sensor signal circuits 1 and 2 - shorted together	Carry out any pinpoint test associated with this DTC using the manufacturer approved diagnostic system. Refer to the electrical circuit diagrams and check brake booster pressure sensor signal circuits 1 and 2 for shorting together. Repair any harness faults found and retest. To validate the repair and extinguish the lamps, start the engine and apply the foot brake
C0047-64	Brake Booster Pressure Sensor - signal plausibility failure	NOTE: Fault detected during non-braking event Signal plausibility failure Electrical wiring harness fault Brake booster pressure sensor failure	Carry out any pinpoint test associated with this DTC using the manufacturer approved diagnostic system. Refer to the electrical circuit diagrams and check brake booster signal 1 and 2 circuits for short to ground, power, open circuit or high resistance. Check connectors for damage or corrosion. Repair any harness faults found and retest. If DTC remains, suspect the brake booster pressure sensor, check and install a new sensor as required, refer to the new module/component installation note at the top of the DTC Index. To validate the repair and extinguish the lamps, start the engine and apply and release the foot brake
C0062-28	Longitudinal Acceleration Sensor - signal bias level out of range/zero adjustment failure	Yaw sensor insecurely mounted Yaw sensor fault	Check the yaw sensor is securely mounted. If the mounting is secure suspect the yaw sensor, Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C0062-54	Longitudinal Acceleration Sensor - missing calibration	The longitudinal acceleration sensor has not been calibrated Mounting bracket bent/misaligned	Check the longitudinal acceleration sensor has been calibrated If it has been calibrated check that the sensor is aligned correctly, check for bent mounting bracket To validate the calibration/repair, ignition on and wait 10 seconds. Check lamps remain extinguished
C0063-08	Yaw Rate Sensor - bus signal /message failures	Wiring harness fault Yaw sensor fault	Refer to the electrical wiring diagrams and check the integrity of the power and ground supplies to the yaw sensor. Check the integrity of the bus connections. Repair any harness faults found and retest. If no harness faults are found suspect the yaw sensor, Refer to the Warranty Policy and Procedures manual if a module/component is suspect. To validate the repair, ignition on and wait 10 seconds. Check lamps remain extinguished.
C0063-14	Yaw Rate Sensor - circuit short to ground or open	Wiring harness fault Sensor fault	Refer to the electrical wiring diagrams and check the high speed CAN circuit between the yaw sensor and the Anti-Lock Braking System Hydraulic Control Unit for short to ground or open circuit. Repair any harness faults found and retest. If no harness faults are found suspect the yaw sensor, Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C0063-1C	Yaw Rate Sensor - circuit voltage out of range	Yaw rate sensor power distribution fault Wiring harness fault Yaw sensor internal fault	Refer to the electrical wiring diagrams and check the power and ground supplies to the yaw sensor. Check power circuit for short to ground or open circuit. Check ground circuit for short to power or open circuit. Repair any harness faults found and retest. If no harness faults are found suspect the yaw sensor, Refer to the Warranty Policy and Procedures manual if a module/component is suspect To confirm the repair and extinguish the warning lamps, clear the DTC, cycle the ignition state to off, then return the ignition state to on and wait up to 10 seconds
C0063-27	Yaw Rate Sensor - signal rate of change	Yaw sensor insecurely mounted Yaw sensor connector insecure Wiring harness fault Yaw sensor fault Anti-Lock Braking System Hydraulic Control Unit fault	Check the yaw sensor is securely mounted. Check the yaw sensor harness connector is securely located. Refer to the electrical wiring diagrams and check the power and ground supplies to the yaw sensor. Check circuits for intermittent open circuit or high resistance. Repair any harness faults found and retest. If no harness faults are found suspect the yaw sensor or Anti-Lock Braking System Hydraulic Control Unit, Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C0063-28	Yaw Rate Sensor - signal bias level out of range/zero adjustment failure	Yaw sensor insecurely mounted Yaw sensor fault	Check the yaw sensor is securely mounted. If the mounting is secure suspect the yaw sensor, Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C0063-41	Yaw Rate Sensor - checksum error	Yaw sensor fault Anti-Lock Braking System Hydraulic Control Unit fault	Replace the yaw sensor, clear the DTC and retest the system. If the DTC remains install a new Anti-Lock Braking System Hydraulic Control Unit. Refer to the Warranty Policy and Procedures manual if a module/component is suspect To confirm the repair and extinguish the warning lamps, clear the DTC, cycle the ignition state to off, then return the ignition state to on and wait up to 10 seconds
C0063-49	Yaw Rate Sensor - internal electronic failure	Yaw rate sensor internal electronic failure Wiring harness fault	Refer to the electrical wiring diagrams and check the power and ground supplies to the yaw sensor. Repair any harness faults found and retest. If no harness faults are found suspect the yaw sensor, Refer to the Warranty Policy and Procedures manual if a module/component is suspect To confirm the repair and extinguish the warning lamps, clear the DTC, cycle the ignition state to off, then return the ignition state to on and wait up to 10 seconds
C0063-64	Yaw Rate Sensor - signal plausibility failure	The vehicle has been operated on a dynamometer/rolling road Yaw rate sensor incorrectly installed Yaw rate sensor fault	NOTE: This DTC can be set if the vehicle is operated on a dynamometer/rolling road, if this is the case the DTC should be stored as a historic DTC This DTC is set if the information coming from the yaw sensor is deemed to be implausible when compared with other sensor information such as steering angle sensor. Check that the yaw sensor is correctly installed on the vehicle. If the sensor is installed correctly suspect the sensor has an internal fault. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C0063-95	Yaw Rate Sensor - incorrect assembly	Incorrect yaw sensor installed	Check the part number of the yaw sensor and fit the correct sensor as required To confirm the repair and extinguish the warning lamps, clear the DTC, cycle the ignition state to off, then return the ignition state to on and wait up to 10 seconds
C101F-49	Generic Valve Failure - internal electronic failure	Anti-Lock Braking System Hydraulic Control Unit fault	Refer to the Warranty Policy and Procedures manual if a module/component is suspect. Check and install a new Anti-Lock Braking System Hydraulic Control Unit
C1A77-16	Valve Relay Supply Circuit - voltage below threshold	Valve relay supply circuit fault Valve relay ground circuit fault	Refer to the electrical wiring diagrams and check the valve relay supply circuit for open circuit or short to ground. Check the valve relay ground circuit for open circuit To confirm the repair and extinguish the warning lamps, clear the DTC, cycle the ignition state to off, then return the ignition state to on and wait up to 10 seconds. If required road test the vehicle at a speed above 20 KPH
C1A90-12	Wheel speed Sensor - incorrect component installed	Wiring harness fault	This DTC is set if at least one wheel speed sensor supply circuit is short to power. Refer to the electrical wiring diagrams and check the wheel speed sensor circuits for short to power. Repair wiring harness as required. Clear the DTC and retest the system
C1A95-4A	Wheel Speed Sensor - signal plausibility failure	Incorrect wheel speed sensor installed	Check and install the correct wheel speed sensor To confirm the repair and extinguish the warning lamps, clear the DTC, cycle the ignition state to off, then return the ignition state to on and wait up to 30 seconds
C1A95-64	Wheel Speed Sensor - signal plausibility failure	Incorrect wheels/tyres installed Electrical wiring harness fault Magnetic pulse wheel damaged/contaminated or de-magnetised EMC influences on wheel speed sensors and supply circuits Wheel speed sensor internal fault	NOTE: This DTC could be set by a flat tyre which would give a continuous different rate of speed when compared to other 3 wheels, if this is the case the DTC should be stored as a historic DTC. Check that approved wheels and tyres are installed. Refer to the electrical circuit diagrams and check the wheel speed sensor circuits for intermittent short to power, or ground. Check the wheel speed sensors and pulse wheels for contamination/damage or de-magnetisation. Clear the DTC and retest the vehicle. If the fault remains check the wheel speed sensor circuits for possible EMC interference. Examine the output from the sensors using an oscilloscope to identify inconsistent patterns or spikes. Repair wiring harness or replace wheel speed sensors or wheel bearings as required. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C1A96-64	Brake Light Switch - signal plausibility failure	Brake pedal switch out of adjustment Brake pedal switch circuit faults Brake pedal switch fault	This DTC is set when the signal from the brake pedal position switch is contradicted by the signal from the master cylinder pressure sensor. Check the adjustment of the brake pedal position switch. Check the Engine Control Module for brake pedal switch related DTCs. Check brake pedal switch circuits for open circuit. Repair wiring as required or install a replacement switch as required. Switch the ignition state to on, press and release brake pedal at least once
C1A97-24	Lateral Accelerometer - signal stuck high	Sensor Internal Fault	This DTC is set when the lateral accelerometer produces an erroneous signal with the vehicle stationary. Suspect sensor, refer to the Warranty Policy and Procedures manual if a module/component is suspect
C1A98-49	Yaw Rate Sensor	Internal electronic failure	Check and install a new sensor as required, refer to the Warranty Policy and Procedures manual if a module/component is suspect
C1A98-64	Yaw Rate Sensor	NOTE: This DTC may set due to a sustained period of steep uphill driving (>35% for four seconds) Yaw rate sensor incorrectly mounted to the vehicle Yaw rate sensor failure	Check the Yaw rate sensor is correctly installed to the vehicle. Check and install a new sensor as required, refer to the Warranty Policy and Procedures manual if a module/component is suspect
C1A98-92	Yaw Rate Sensor - performance or incorrect operation	Yaw rate sensor incorrectly mounted to the vehicle.	Check the mounting of the yaw rate sensor and correct or replace sensor as required. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C1A98-96	Yaw Rate Sensor - component internal failure	Yaw rate sensor incorrectly installed Yaw rate sensor wiring fault EMC influences on yaw rate sensor and circuits Yaw rate sensor internal fault	Clear the DTC and retest the system. If the fault remains check for additional DTCs and refer to the DTC index. Check the Yaw sensor is mounted correctly on the vehicle. Check the wiring connections to the sensor are correct and secure. Check for any sources of EMC interference with the sensor or circuits. If no external causes are evident suspect the sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C1A98-2F	Yaw Rate Sensor - signal erratic	The signal from the yaw rate sensor has been suspicious for > 2 minutes but has not yet moved fully to fault condition	NOTE: This DTC may be stored even though no fault condition is present and should be ignored. Clear the DTC and retest. Verify the customer concern prior to diagnosis Information only, regard as normal operation. Clear the DTC and retest the system
C1A99-28	Pressure Sensor - signal bias level out of range / zero adjustment failure	Pedal box adjustment incorrect Pedal box fault Anti-Lock Braking System Control Module fault	Check the pedal box is adjusted/operating correctly, perform any necessary adjustments, clear DTC and retest system. If DTC resets suspect Anti-Lock Braking System Control Module. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C1B00-16	Steering Angle Sensor - circuit voltage below threshold	Steering angle sensor not initialised and calibrated Wiring harness fault Sensor internal fault	The sensor is calibrated at every new ignition cycle, every time the vehicle is driven away from standstill. The DTC indicates that the steering offset exceeded allowed values and that the calibration process was restarted. Check for a disturbance of the ignition supply to the sensor. Refer to the electrical circuit diagrams and check the steering angle sensor wiring harness and circuits for open circuits, short to ground. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C1B00-1C	Steering Angle Sensor - circuit voltage out of range	Wiring harness fault Sensor internal fault	Refer to the electrical circuit diagrams and check the steering angle sensor wiring harness and sensor signal circuits for open circuits, short to power or ground. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C1B00-27	Steering Angle Sensor - signal rate of change above threshold	Harness fault Sensor internal fault	Refer to the electrical circuit diagrams, check the wiring harness connection at the steering angle sensor for security and check circuits for intermittent faults. Clear DTC and retest system. The sensor is calibrated at every new ignition cycle, every time the vehicle is driven away from standstill. If fault returns suspect sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C1B00-49	Steering Angle Sensor - internal electronic failure	Steering angle sensor not installed in the correct position Steering angle sensor internal fault	Check the installed position of the steering angle sensor. Remove and reinstall if required. Clear DTC. The sensor is calibrated at every new ignition cycle, every time the vehicle is driven away from standstill. Retest system. If fault returns suspect sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C1B00-64	Steering Angle Sensor - signal plausibility failure	Steering angle sensor not installed in the correct position Yaw rate sensor not installed in the correct position Steering angle sensor internal fault	This DTC is set when there is conflicting information coming from the Steering Angle Sensor and the Yaw Rate Sensor. Check both of these sensors to ensure they are correctly installed on the vehicle. Check for other related DTCs. Clear the DTC. The sensor is calibrated at every new ignition cycle, every time the vehicle is driven away from standstill. If the DTC returns suspect the Steering Angle Sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
C1B00-66	Steering Angle Sensor - signal has too many transitions/events	Wiring harness fault Steering angle sensor internal fault	Refer to the electrical circuit diagrams and check the steering angle circuits for short circuit to each other. If no harness faults are found suspect the steering angle sensor, refer to the Warranty Policy and Procedures manual if a module/component is suspect
C1B00-68	Steering Angle Sensor - event information	Conditions not met under which the sensor can learn the centre position	Information only, regard as normal operation. Clear the DTC and retest the system. Switch the ignition state to on, engine running, accelerate > 5.4 kph with steering input
C1B02-16	Return Pump - circuit voltage below threshold	Wiring harness fault	Refer to the electrical circuit diagrams and check the return pump supply and ground circuits for short to ground or open circuit To confirm the repair and extinguish the warning lamps, clear the DTC, cycle the ignition state to off, then return the ignition state to on and drive the vehicle above 9mph/15kph
C1B02-49	Return Pump - internal electronic failure	Internal fault within the Anti-Lock Braking System Hydraulic Control Unit	Install a new hydraulic control unit. Refer to the Warranty Policy and Procedures manual if a module/component is suspect To confirm the repair and extinguish the warning lamps, clear the DTC, cycle the ignition state to off, then return the ignition state to on and drive the vehicle above 9mph/15kph
C2009-95	Front Axle Wheel Speed Sensors Swapped - incorrect assembly	Vehicle unevenly loaded Incorrect tyres installed Wiring harness fault	Check the vehicle is not unevenly loaded (heavy on one side). Check that approved wheels and tyres are installed. Refer to electrical circuit diagrams and check if the front wheel speed sensor connectors are transposed or incorrectly attached at the wiring harness connector
C200A-95	Rear Axle Wheel Speed Sensors Swapped - incorrect assembly	Vehicle unevenly loaded Incorrect tyres installed Wiring harness fault	Check the vehicle is not unevenly loaded (heavy on one side). Check that approved wheels and tyres are installed. Refer to electrical circuit diagrams and check if the rear wheel speed sensor connectors are transposed or incorrectly attached at the wiring harness connector
U0001-88	High Speed CAN Communication bus - bus off	Wiring harness fault	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network
U0074-13	Control Module Communication Bus B off - circuit open	Wiring harness fault	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Refer to the electrical circuit diagrams and check the private CAN bus circuits between the Yaw Rate Sensor and the Anti-Lock Braking System control module for open circuit
U0074-88	Control Module Communication Bus B off - bus off	Wiring harness fault	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Refer to the electrical circuit diagrams and check the private CAN bus circuits between the Yaw Rate Sensor and the Anti-Lock Braking System control module for short to ground, short to power open circuit. check for insecure connectors
U0100-00	Lost Communication With ECM/PCM A - no sub type information	Power distribution fault Wiring harness fault	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network between the Engine Control Module and the Anti-Lock Braking System Control Module To confirm the repair and extinguish the warning lamps, clear the DTC, cycle the ignition state to off, then return the ignition state to on and wait up to 10 seconds
U0100-87	Lost Communication With ECM/PCM "A" - Missing message	Power distribution fault Wiring harness fault	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network between the Engine Control Module and the Anti-Lock Braking System Control Module To confirm the repair and extinguish the warning lamps, clear the DTC, cycle the ignition state to off, then return the ignition state to on and wait up to 10 seconds
U0101-00	Lost Communication With TCM - no sub type information	Power distribution fault Wiring harness fault	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network between the Transmission Control Module and the Anti-Lock Braking System Control Module
U0101-87	Lost Communication with TCM - missing message	Power distribution fault Wiring harness fault	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network between the Transmission Control Module and the Anti-Lock Braking System Control Module
U0103-00	Lost Communication With Gear Shift Control Module A - no sub type information	Power distribution fault Wiring harness fault	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network between the Transmission Shift Control Module and the Anti-Lock Braking System Control Module
U0103-87	Lost Communication With Gear Shift Module - Missing message	Power distribution fault Wiring harness fault	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network between the Transmission Shift Control Module and the Anti-Lock Braking System Control Module
U0104-00	Lost Communication With Cruise Control Module - no sub type information	Power distribution fault Wiring harness fault	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network between the Adaptive Speed Control Module and the Anti-Lock Braking System Control Module
U0104-87	Lost Communication With Cruise Control Module - missing message	Invalid brake demand pressure received from the Adaptive Speed Control Module Power distribution fault Wiring harness fault	NOTE: This DTC can be set by either lost communication over CAN or by the ABS receiving an invalid brake demand pressure from the Adaptive Speed Control Module Check for Adaptive Speed Control Module related DTCs Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network between the Adaptive Speed Control Module and the Anti-Lock Braking System Control Module
U0123-00	Lost Communication With Yaw Rate Sensor Module - no sub type information	Power distribution fault Wiring harness fault Sensor failure	Refer to the electrical circuit diagrams and check the power and ground connections to the Yaw Rate Sensor. Refer to the electrical circuit diagrams and check the CAN network between the Yaw Rate Sensor Module and the Anti-Lock Braking System Control Module If no harness faults are found, suspect the yaw rate sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect To confirm the repair and extinguish the warning lamps, clear the DTC, cycle the ignition state to off, then return the ignition state to on and wait up to 10 seconds
U0123-87	Lost Communication With Yaw Rate Sensor Module - missing message	Yaw rate sensor HS CAN circuit - open circuit Yaw rate sensor ignition supply circuit - short to ground, open circuit Sensor failure	Refer to the electrical circuit diagrams and check the power and ground connections to the Yaw Rate Sensor. Refer to the electrical circuit diagrams and check the CAN network between the Yaw Rate Sensor Module and the Anti-Lock Braking System Control Module If no harness faults are found, suspect the yaw rate sensor. Refer to the Warranty Policy and Procedures manual if a module/component is suspect To confirm the repair and extinguish the warning lamps, clear the DTC, cycle the ignition state to off, then return the ignition state to on and wait up to 10 seconds
U0128-00	Lost Communication With Park Brake Control Module - no sub type information	Power distribution fault Wiring harness fault	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network between the Park Brake Control Module and the Anti-Lock Braking System Control Module
U0128-87	Lost Communication With Park Brake Control Module - Missing message	Power distribution fault Wiring harness fault	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network between the Park Brake Control Module and the Anti-Lock Braking System Control Module
U0139-00	Lost Communication With Suspension Control Module B - no sub type information	Power distribution fault Wiring harness fault	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network between the Anti-Lock Braking System Control Module and the Adaptive Damping Control Module
U0140-00	Lost Communication With Central Junction Box - no sub type information	Power distribution fault Wiring harness fault	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network between the Central Junction Box and the Anti-Lock Braking System Control Module
U0155-00	Lost Communication With Instrument Panel Cluster (IPC) Control Module - no sub type information	Power distribution fault Wiring harness fault	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network between the Anti-Lock Braking System Control Module and the Instrument Panel Cluster (IPC) Control Module
U0300-00	Internal Control Module Software Incompatibility - no sub type information	The Anti-Lock Braking System Control Module is not compatible with the vehicle	Check the Anti-Lock Braking System control module part number, install the correct part as required. Refer to the Warranty Policy and Procedures manual if a module/component is suspect To confirm the repair and extinguish the warning lamps, clear the DTC, cycle the ignition state to off, then return the ignition state to on and wait up to 10 seconds
U0401-68	Invalid Data Received From ECM/PCM - event information	Event information - engine control module related concern	Check the Engine Control Module for related DTCs and refer to the relevant DTC index To confirm the repair and extinguish the warning lamps, clear the DTC, cycle the ignition state to off, then return the ignition state to on and wait up to 10 seconds
U0402-68	Invalid Data Received From Transmission Control Module - event information	Event information - Transmission Control Module related concern	Check the Transmission Control Module for related DTCs and refer to the relevant DTC index
U0404-68	Invalid Data Received From Gear Shift Module A - event information	Event information - transmission shift module related concern	Check the Transmission Shift Module for Dynamic Stability Control switch related DTCs and refer to the relevant DTC index
U0405-68	Invalid Data Received From Cruise Control Module - event information	Event information - speed control module related concern	Check the Speed Control Module for related DTCs and refer to the relevant DTC index
U0417-68	Invalid Data Received From Park Brake Control Module - event information	Event information - electric park brake control module related concern	Check the Electric Park Brake Control Module for related DTCs and refer to the relevant DTC index
U0443-68	Invalid Data Received From Body Control Module "B"	Event information	Check the RJB for related DTCs and refer to the relevant DTC Index
U1A14-00	CAN Initialisation Failure - no sub type information	Power distribution fault Wiring harness fault	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network
U2001-68	Reduced System Function - event information	Event information - The pump motor wear estimator has reached a preset limit which mean that the Anti-Lock Braking System control module will no longer support adaptive speed control	Refer to the Warranty Policy and Procedures manual if a module/component is suspect. Check and install a new Anti-Lock Braking System Hydraulic Control Unit as required
U200D-14	Control Module Output Power A - circuit short to ground or open	Wiring harness fault Vacuum boost pressure sensor failure (V6 petrol variants only) Steering angle sensor fault HCU failure	NOTE: This monitoring is based on detecting that the supply voltage from the ABS modulator is out of range (4.5V - 5.3 V) Refer to the electrical circuit diagrams and check the power and ground connections to the Anti-Lock Braking System Control Module. Check the circuits between the steering angle sensor and the Anti-Lock Braking System Control Module, in particular check the steering angle sensor ground at the Anti-Lock Braking System Control Module connector pin. On V6 Petrol variants check the circuits between the vacuum boost pressure sensor and the Anti-Lock Braking System Control Module, in particular check the vacuum boost pressure sensor power supply at the Anti-Lock Braking System Control Module connector pin. If no wiring harness faults are found and the power and ground supplies to the vacuum boost pressure sensor, steering angle sensor and Anti-Lock Braking System Control Module are ok then suspect (1) the vacuum boost pressure sensor, (2) the steering angle sensor, (3) the Anti-Lock Braking System Control Module. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
U2101-00	Control Module configuration Incompatible - no sub type information	Anti-Lock Braking System Control Module variant code value not supported on this vehicle	Check/amend the car configuration file in the Central Junction Box using the manufacturer approved diagnostic system
U2101-68	Control Module configuration Incompatible - event information	Anti-Lock Braking System Control Module has been substituted from another vehicle A new Anti-Lock Braking System Control Module has been installed	NOTE: The DTC is only for information and the system will have full functionality Check if the Anti-Lock Braking System Control Module has been previously installed to another vehicle, if so: Install the correct Anti-Lock Braking System Control Module for this vehicle. If the Anti-Lock Braking System Control Module is new, cycle the ignition ON/OFF and clear the DTC. Retest the system
U2300-54	Central Configuration - missing calibration	Configuration missing	Check/amend the car configuration file using the manufacturer approved diagnostic system
U3000-45	Control Module - program memory failure	Anti-Lock Braking System Control Module memory failure	Check Anti-Lock Braking System Control Module, clear DTC and retest system. If the fault returns install a new Anti-Lock Braking System Hydraulic control Unit. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
U3000-49	Control Module - internal electronic failure	Anti-Lock Braking System Control Module internal electronic failure	Refer to the Warranty Policy and Procedures manual if a module/component is suspect. Install a new Anti-Lock Braking System Hydraulic Control Unit
U3000-4B	Control Module - over temperature	Anti-Lock Braking System valve overheat protection has been activated	NOTE: This DTC may be set if the manufacturer approved diagnostic system has been operating the valves for a prolonged period Allow the Anti-Lock Braking System Hydraulic Control Unit to cool, Clear the DTC and retest the system
U3000-68	Control Module - event information	Event information - Anti-Lock Braking System intervention in progress for an unfeasible length of time	Check for other DTCs relating to wheel speed, yaw rate, steering angle and component failures. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
U3000-87	Control Module - missing message	Error/mismatch in Car Configuration file	Download the Car Configuration File from the RJB using the manufacturer approved diagnostic system, check and amend to suit vehicle specification
U3002-81	Vehicle Identification Number - invalid serial data received	The Anti-Lock Braking System Hydraulic Control Unit has previously been installed to another vehicle	NOTE: The module will continue to work normally even with the stored DTC Check and install the original, or a new Anti-Lock Braking System Hydraulic Control Unit. Refer to the Warranty Policy and Procedures manual if a module/component is suspect
U3003-62	Battery Voltage - signal compare failure	There is a difference of more than 2 volts between the power supply to the Anti-Lock Braking System Hydraulic Control Unit and the Central Junction Box	Refer to the electrical circuit diagrams and check the power and ground supply circuits to the Central Junction Box and the Anti-Lock Braking System Hydraulic Control Unit. Repair wiring as required, clear the DTC and retest the system
U3006-16	Control Module Input Power A - circuit voltage below threshold	Power supply voltage low at Anti-Lock Braking System Hydraulic Control Unit	Refer to the electrical circuit diagrams and check the power and ground supply circuits to the Anti-Lock Braking System Hydraulic Control Unit for open circuit, short to ground. Repair wiring as required, clear the DTC and retest the system
U3006-17	Control Module Input Power A - circuit voltage above threshold	Power supply voltage high at Anti-Lock Braking System Hydraulic Control Unit	Suspect overcharging. Check the Engine Control Module for charging related DTCs and refer to the relevant DTC index. Refer to the information and battery care manual and check the vehicle charging circuit performance. Rectify any charging circuit concerns and clear the DTC. Retest the system
U3006-1C	Control Module Input Power A - circuit voltage out of range	Power supply voltage momentarily low at the Anti-Lock Braking System Hydraulic Control Unit	Refer to the electrical circuit diagrams and check the power and ground supply circuits to the Anti-Lock Braking System Hydraulic Control Unit for intermittent open circuit, short to ground, or high resistance. Check the Engine Control Module for charging related DTCs and refer to the relevant DTC index. Refer to the information and battery care manual and check the vehicle battery condition and charging circuit performance. Rectify any battery or charging circuit concerns and clear the DTC. Retest the system