Headlamp Control Module A (HCM)

WARNING: This page is about a different car, the 2012 Land Rover Range Rover Sport and 2011 Land Rover Range Rover Sport. 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.

NOTE: If the control module or a component is suspect and the vehicle remains under manufacturer warranty, refer to the Warranty Policy and Procedures information, or determine if any prior approval program 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: 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 DTCs 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.

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 Information. Refer to HEADLAMPS .

DTC	Description	Possible Causes	Action
B1041-04	Levelling Control - System internal failures	No headlamp levelling functionality - Module internal failure	Install a new headlamp Control module as required. Refer to the Warranty Policy and Procedures information
B1041-54	Levelling Control - Missing calibration	Levelling 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 levelling sensor calibration routine using the manufacturer approved diagnostic system
B1087-83	LIN Bus "A" - Value of signal protection calculation incorrect	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 information
B1087-86	LIN Bus "A" - Signal invalid	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 information
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. Check for other related DTCs
B10AE-11	Headlamp Levelling Motor - Circuit short to ground	Headlamp Levelling motor Control circuit - short to ground	Refer to the electrical circuit diagrams and check headlamp levelling motor Control circuit for short to ground and the motor signal voltage
B10AE-12	Headlamp Levelling Motor - Circuit short to battery	Headlamp levelling motor Control circuit - short to power	Refer to the electrical circuit diagrams and check headlamp levelling motor Control circuit for short to power
B10AE-64	Headlamp Levelling Motor - Signal plausibility failure	signal plausibility failure	Refer to the electrical circuit diagrams and check the LIN bus circuit. Check for other related DTCs
B1A59-11	Sensor 5 Volt Supply - Circuit short to ground	Headlamp levelling sensor 5 volt supply circuit - short to ground	Refer to the electrical circuit diagrams and check headlamp levelling sensor 5 volt supply circuit for short to ground
B1A59-12	Sensor 5 Volt Supply - Circuit short to battery	Headlamp levelling sensor 5 volt supply circuit - short to power	Refer to the electrical circuit diagrams and check headlamp levelling sensor 5 volt supply circuit for short 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
B1D64-04	Left Headlamp Swivelling Motor - System internal failures	System internal failures - 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 and re-test. If the DTC persists, install a new headlamp
B1D64-87	Left Headlamp Swivelling Motor - Missing message	Missing message	Check the headlamp connections, clear DTC and re-test. If DTC remains install a new headlamp
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
B1D65-04	Right Headlamp Swivelling Motor - System internal failures	System internal failures - 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 and re-test. If the DTC persists, install a new headlamp
B1D65-87	Right Headlamp Swivelling Motor - Missing message	Missing message	Check the headlamp connections, clear DTC and re-test, if DTC remains install a new headlamp
B1D68-00	Left Headlamp Swivelling Feedback Sensor - No sub type information	sensor not detected	Check the headlamp connector for integrity. Refer to the circuit diagrams and check headlamp circuit. Clear DTC and re-test, if DTC remains install a new headlamp
B1D69-00	Right Headlamp Swivelling Feedback Sensor - No sub type information	sensor not detected	Check the headlamp connector for integrity. Refer to the circuit diagrams and check headlamp circuit. Clear DTC and re-test, if DTC remains install a new headlamp
C1A04-11	Right Front Height Sensor - Circuit short to ground	Height sensor harness wiring short circuit to ground	Check the Ride Level Module for DTCs. Check the sensor connector for damage. Refer to the electrical circuit diagrams and check the sensor circuit for continuity or short circuit. Check sensor signal changes when sensor is rotated. If any height sensor fixings are slackened or found to be loose, or a height sensor has been changed, the vehicle ride height must be re-calibrated. Calibrate the system using the approved diagnostic system
C1A04-15	Right Front Height Sensor - Circuit short to battery or open	Height sensor harness wiring short circuit to power	Check the Ride Level Module for DTCs. Check the sensor connector for damage. Refer to the electrical circuit diagrams and check the sensor circuit for continuity or short circuit. Check sensor signal changes when sensor is rotated. If any height sensor fixings are slackened or found to be loose, or a height sensor has been changed, the vehicle ride height must be re-calibrated. Calibrate the system using the approved diagnostic system
C1A04-64	Right Front Height Sensor - Signal plausibility failure	Height sensor signal plausibility failure	Check the Ride Level Module for DTCs. Check the sensor connector for damage. Refer to the electrical circuit diagrams and check the sensor circuit for continuity or short circuit. Check sensor signal changes when sensor is rotated. If any height sensor fixings are slackened or found to be loose, or a height sensor has been changed, the vehicle ride height must be re-calibrated. Calibrate the system using the approved diagnostic system
C1A06-11	Right Rear Height Sensor - Circuit short to ground	Height sensor harness wiring short circuit to ground	Check the Ride Level Module for DTCs. Check the sensor connector for damage. Refer to the electrical circuit diagrams and check the sensor circuit for continuity or short circuit. Check sensor signal changes when sensor is rotated. If any height sensor fixings are slackened or found to be loose, or a height sensor has been changed, the vehicle ride height must be re-calibrated. Calibrate the system using the approved diagnostic system
C1A06-15	Right Rear Height Sensor - Circuit short to battery or open	Height sensor harness wiring short circuit to power	Check the Ride Level Module for DTCs. Check the sensor connector for damage. Refer to the electrical circuit diagrams and check the sensor circuit for continuity or short circuit. Check sensor signal changes when sensor is rotated. If any height sensor fixings are slackened or found to be loose, or a height sensor has been changed, the vehicle ride height must be re-calibrated. Calibrate the system using the approved diagnostic system
C1A06-64	Right Rear Height Sensor - Signal plausibility failure	Height sensor signal plausibility failure	Check the Ride Level Module for DTCs. Check the sensor connector for damage. Refer to the electrical circuit diagrams and check the sensor circuit for continuity or short circuit. Check sensor signal changes when sensor is rotated. If any height sensor fixings are slackened or found to be loose, or a height sensor has been changed, the vehicle ride height must be re-calibrated. Calibrate the system using the approved diagnostic system
U0001-88	High Speed CAN Communication Bus - Bus off	Bus off	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
U0101-00	Lost Communication with TCM - No sub type information	CAN Bus communication error	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 Headlamp Control Module
U0102-00	Lost Communication with Transfer Case Control Module - No sub type information	CAN Bus communication error	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 Transfer Case Control Module and Headlamp Control Module
U0121-00	Lost Communication With Anti-Lock Brake System (ABS) Control Module - No sub type information	CAN Bus communication error	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 ABS Module and Headlamp Control Module
U0126-00	Lost Communication With Steering Angle Sensor Module - No sub type information	CAN Bus communication error	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 Steering Angle Sensor Control Module and Headlamp Control Module
U0140-00	Lost Communication With Body Control Module - No sub type information	CAN Bus communication error	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 Headlamp Control Module
U0142-00	Lost Communication With Body Control Module "B" - No sub type information	CAN Bus communication error	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 Headlamp Control Module
U0300-00	Internal Control Module Software Incompatibility - No sub type information	Car Configuration File information incompatible to ECU	Check/amend Car Configuration File using the manufacturer approved diagnostic system
U0402-00	Invalid Data Received From Transmission Control Module - No sub type information	No sub type information	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	No sub type information	Check the Transfer Case Control Module for related DTCs and refer to the relevant DTC index
U0415-00	Invalid Data Received From Anti-Lock Brake 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	No sub type information	Check the steering angle sensor module for related DTCs and refer to the relevant DTC index
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 ECU	Check/amend Car Configuration File using manufacturer approved diagnostic system
U3002-81	Vehicle Identification Number - Invalid serial data received	Stored VIN does not match most recent VIN	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 workshop information. Refer to the electrical information 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 workshop information. Refer to the electrical information 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 workshop information. Refer to the electrical circuit diagrams and check the power and ground supply circuits to both modules