Headlamp Control Module (HCM)

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

CAUTION: 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

NOTE: 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)

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

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

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

NOTE: 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

NOTE: Where an 'on demand self-test' is referred to, this can be accessed via the 'DTC Monitor' tab on the manufacturers approved diagnostic system

The table below lists all diagnostic trouble codes (DTCs) that could be logged in the headlamp control module, for additional diagnosis and testing information refer to the relevant diagnosis and testing section. For additional information, refer to DIAGNOSIS AND TESTING .

DTC	Description	Possible Causes	Action
B1041-04	Leveling Control - System internal failures	No headlamp control module functionality- module internal failure	Install a new headlamp control module as required. Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module
B1041-54	Leveling Control - missing calibration	Leveling sensor calibration routine not carried out	NOTE: Sensor calibration routine must be carried out with the vehicle unladen and with correct tire pressures Carry out the leveling sensor calibration routine using the manufacturer approved diagnostic system
B1087-83	LIN Bus ""A"" - value of signal protection calculation incorrect	LIN bus circuit fault - checksum error	Clear the DTC and re-test. If the DTC remains, install a new headlamp control module. Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module
B1087-86	LIN Bus ""A"" - signal invalid	LIN bus circuit fault - signal invalid	Clear the DTC and re-test. If the DTC remains, install a new headlamp control module. Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module
B1087-88	LIN Bus ""A"" - bus off	Bus off - LIN bus circuit short circuit to ground	Refer to the electrical circuit diagrams and check the LIN bus circuit for short circuit to ground. Check for other related DTCs
B10AE-11	Headlamp Leveling Motor - circuit short to ground	Headlamp leveling motor control circuit - short circuit to ground	Refer to the electrical circuit diagrams and check headlamp leveling motor control circuit for short circuit to ground and the headlamp leveling motor signal voltage
B10AE-12	Headlamp Leveling Motor - circuit short to battery	Headlamp leveling motor control circuit - short circuit to power	Refer to the electrical circuit diagrams and check headlamp leveling motor control circuit for short circuit to power
B10AE-64	Headlamp Leveling Motor - signal plausibility failure	Headlamp leveling motor - signal plausibility failure	Refer to the electrical circuit diagrams and check the DC motor signal circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Check for other related DTCs
B1A59-11	Sensor 5 Volt Supply - circuit short to ground	Headlamp leveling sensor 5 volt supply circuit - short circuit to ground	Refer to the electrical circuit diagrams and check headlamp leveling sensor 5 volt supply circuit for short circuit to ground
B1A59-12	Sensor 5 Volt Supply - circuit short to battery	Headlamp leveling sensor 5 volt supply circuit - short circuit to power	Refer to the electrical circuit diagrams and check headlamp leveling sensor 5 volt supply circuit for short circuit to power
B1D64-01	Left Headlamp Swivelling Motor - general electrical failure	General electrical failure - left headlamp swivelling motor error	Check the headlamp connections, clear the DTC and re-test. If the DTC remains, install a new headlamp. Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new component
B1D64-04	Left Headlamp Swivelling Motor - system internal failures	System internal failure - left headlamp swivelling motor error	Check the headlamp connections, clear the DTC, switch off the ignition and allow sufficient time for the module to power down - then re-test. If the DTC persists, install a new headlamp. Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new component
B1D64-87	Left Headlamp Swivelling Motor - missing message	Left headlamp swivelling motor - missing message	Check the headlamp connections. Refer to the electrical circuit diagrams and check power and ground supplies to headlamp adaptive front lighting system modules. Clear DTC and re-test. If DTC remains, install a new headlamp. Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new component
B1D65-01	Right Headlamp Swivelling Motor - general electrical failure	General electrical failure - right headlamp swivelling motor error	Clear the DTC and re-test. If the DTC remains, install a new headlamp. Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new component
B1D65-04	Right Headlamp Swivelling Motor - system internal failures	System internal failure - right headlamp swivelling motor error	Check the headlamp connections, clear the DTC, switch off the ignition and allow sufficient time for the module to power down - then re-test. If the DTC persists, install a new headlamp. Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new component
B1D65-87	Right Headlamp Swivelling Motor - missing message	Right headlamp swivelling motor - missing message	Check the headlamp connections. Refer to the electrical circuit diagrams and check power and ground supplies to headlamp adaptive front lighting system modules. Clear DTC and re-test. If DTC remains, install a new headlamp. Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new component
B1D68-00	Left Headlamp Swivelling Feedback Sensor - no sub type information	Left headlamp swivelling feedback sensor not detected	Check the headlamp connector for integrity. Refer to the electrical circuit diagrams and check headlamp circuit. Clear DTC and re-test, if DTC remains, install a new headlamp. Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new component
B1D69-00	Right Headlamp Swivelling Feedback Sensor - no sub type information	Right headlamp swivelling feedback sensor not detected	Check the headlamp connector for integrity. Refer to the electrical circuit diagrams and check headlamp circuit. Clear DTC and re-test, if DTC remains, install a new headlamp. Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new component
C1A04-11	Right Front Height Sensor - circuit short to ground	Front height sensor harness wiring - short circuit to ground	Check the ride level control module for DTCs. Check the sensor connector for damage. Refer to the electrical circuit diagrams and check the sensor circuit for short circuit to ground, open circuit, high resistance. Check sensor signal changes when sensor is rotated. If any height sensor fixings are slackened or found to be loose, or if a height sensor has been changed, the vehicle ride height must be re-calibrated. Carry out the calibration routine using the manufacturer approved diagnostic system
C1A04-15	Right Front Height Sensor - circuit short to battery or open	Front height sensor harness wiring - short circuit to power, open circuit, high resistance	Check the ride level control module for DTCs. Check the sensor connector for damage. Refer to the electrical circuit diagrams and check the sensor circuit for short circuit to power, open circuit, high resistance. Check sensor signal changes when sensor is rotated. If any height sensor fixings are slackened or found to be loose, or if a height sensor has been changed, the vehicle ride height must be re-calibrated. Carry out the calibration routine using the manufacturer approved diagnostic system
C1A04-64	Right Front Height Sensor - signal plausibility failure	Front height sensor - signal plausibility failure	NOTE: This DTC may be logged if the vehicle's wheels have been raised from the floor Check the ride level control module for DTCs. Check the sensor connector for damage. Refer to the electrical circuit diagrams and check the sensor circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Check sensor signal changes when sensor is rotated. If any height sensor fixings are slackened or found to be loose, or if a height sensor has been changed, the vehicle ride height must be re-calibrated. Carry out the calibration routine using the manufacturer approved diagnostic system
C1A06-11	Right Rear Height Sensor - circuit short to ground	Rear height sensor harness wiring - short circuit to ground	Check the ride level control module for DTCs. Check the sensor connector for damage. Refer to the electrical circuit diagrams and check the sensor circuit for short circuit to ground, open circuit, high resistance. Check sensor signal changes when sensor is rotated. If any height sensor fixings are slackened or found to be loose, or if a height sensor has been changed, the vehicle ride height must be re-calibrated. Carry out the calibration routine using the manufacturer approved diagnostic system
C1A06-15	Right Rear Height Sensor - circuit short to battery or open	Rear height sensor harness wiring - short circuit to power, open circuit, high resistance	Check the ride level control module for DTCs. Check the sensor connector for damage. Refer to the electrical circuit diagrams and check the sensor circuit for short circuit to power, open circuit, high resistance. Check sensor signal changes when sensor is rotated. If any height sensor fixings are slackened or found to be loose, or if a height sensor has been changed, the vehicle ride height must be re-calibrated. Carry out the calibration routine using the manufacturer approved diagnostic system
C1A06-64	Right Rear Height Sensor - signal plausibility failure	Rear height sensor - signal plausibility failure	NOTE: This DTC may be logged if the vehicle's wheels have been raised from the floor Check the ride level control module for DTCs. Check the sensor connector for damage. Refer to the electrical circuit diagrams and check the sensor circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Check sensor signal changes when sensor is rotated. If any height sensor fixings are slackened or found to be loose, or if a height sensor has been changed, the vehicle ride height must be re-calibrated. Carry out the calibration routine using the manufacturer approved diagnostic system
U0001-88	High Speed CAN Communication Bus - bus off	Bus off - CAN bus communication error	Refer to the electrical circuit diagrams and check the power and ground connections to the central junction box. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network
U0101-00	Lost Communication with Transmission Control Module - no sub type information	Lost communication with transmission control module - CAN bus communication error	Refer to the electrical circuit diagrams and check the power and ground connections to the transmission control 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 headlamp control module
U0102-00	Lost Communication with Transfer Case Control Module - no sub type information	Lost communication with transfer case control module - CAN bus communication error	Refer to the electrical circuit diagrams and check the power and ground connections to the transfer case control 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 transfer case control module and headlamp control module
U0121-00	Lost Communication With ABS Control Module - no sub type information	Lost communication with ABS control module - CAN bus communication error	Refer to the electrical circuit diagrams and check the power and ground connections to the ABS 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 ABS module and headlamp control module
U0126-00	Lost Communication With Steering Angle Sensor Module - no sub type information	Lost communication with steering angle sensor module - CAN bus communication error	Refer to the electrical circuit diagrams and check the power and ground connections to the steering angle sensor 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 steering angle sensor control module and headlamp control module
U0140-00	Lost Communication With Body Control Module - no sub type information	Lost communication with central junction box - CAN bus communication error	Refer to the electrical circuit diagrams and check the power and ground connections to central junction box. 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 headlamp control module
U0142-00	Lost Communication With Body Control Module ""B"" - no sub type information	Lost communication with rear junction box - CAN bus communication error	Refer to the electrical circuit diagrams and check the power and ground connections to the rear junction box. 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 rear junction box and headlamp control module
U0300-00	Internal Control Module Software Incompatibility - no sub type information	Car configuration file information incompatible to engine control unit	Check/amend car configuration file using the manufacturer approved diagnostic system
U0402-00	Invalid Data Received From Transmission Control Module - no sub type information	Invalid data received from transmission control module	Check the transmission control module for related DTCs and refer to the relevant DTC index
U0403-00	Invalid Data Received From Transfer Case Control Module - no sub type information	Invalid data received from transfer case control module	Check the transfer case control module for related DTCs and refer to the relevant DTC index
U0415-00	Invalid Data Received From Anti-Lock Braking System Control Module - no sub type information	Invalid data received from ABS module	Check the ABS module for related DTCs and refer to the relevant DTC index
U0428-00	Invalid Data Received From Steering Angle Sensor Module - no sub type information	Invalid data received from steering angle sensor module	Check the steering angle sensor module for related DTCs and refer to the relevant DTC index
U0443-00	Invalid Data Received From Body Control Module ""B"" - no sub type information	Invalid data received from rear junction box	Check the rear junction box for stored DTCs. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to electrical circuit diagrams - check the CAN network between the adaptive front lighting system control module and the rear junction box
U2100-00	Initial Configuration Not Complete - no sub type information	Car configuration file information not received completely	Check/amend car configuration file using manufacturer approved diagnostic system
U2101-00	Control Module Configuration Incompatible - no sub type information	Car configuration file information incompatible to engine control unit	Check/amend car configuration file using manufacturer approved diagnostic system
U3002-81	Vehicle Identification Number - invalid serial data received	Stored vehicle identification number does not match most recent vehicle identification number	Check/amend car configuration file using manufacturer approved diagnostic system
U3003-16	Battery Voltage - circuit voltage below threshold	Circuit voltage below threshold	Check vehicle battery and charging system. Refer to the relevant information. Refer to the electrical circuit diagrams and check the power and ground supply circuits to the module
U3003-17	Battery Voltage - circuit voltage above threshold	Circuit voltage above threshold	Check vehicle battery and charging system. Refer to the relevant information. Refer to the electrical circuit diagrams and check the power and ground supply circuits to the module
U3003-62	Battery Voltage - signal compare failure	Mis-match in battery voltage between central junction box and headlamp control module of 2 volts or more	Check vehicle battery and charging system. Refer to the relevant information. Refer to the electrical circuit diagrams and check the power and ground supply circuits to central junction box and headlamp control module