DTC: 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.

NOTE: If a control module or 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, before the replacement of a 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 (DMM) accurate to three decimal places, and with an up-to-date calibration certificate. When testing resistance always take the resistance of the DMM 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 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 leveling control module, for additional Diagnosis and Testing information refer to the relevant Diagnosis and Testing Information. Refer to HEADLAMPS .

DTC	Description	Possible Cause	Action
B1041-04	Leveling Control - System Internal Failures	Headlamp leveling control module internal failure	Install a new headlamp leveling control module as required
B1041-54	Leveling Control - Missing Calibration	NOTE: This DTC will normally be logged when a new module has been installed. Leveling sensor calibration routine not carried out	NOTE: Sensor calibration routine must be carried out with the vehicle unladen. Calibrate the headlamp leveling sensors using the manufacturer approved diagnostic system, carry the out routine 'Headlamp Control Module System Calibration'
B1087-83	LIN Bus "A" - Value of signal protection calculation incorrect	LIN Bus circuit fault No communication on the LIN Bus LIN bus EMC interference	NOTE: This circuit uses shielded cable Refer to the electrical circuit diagrams and check the LIN bus circuit for harness damage
B1087-86	LIN Bus "A" - Signal Invalid	LIN Bus circuit fault No communication on the LIN Bus LIN bus EMC interference	NOTE: This circuit uses shielded cable Refer to the electrical circuit diagrams and check the LIN bus circuit for harness damage
B1087-88	LIN Bus "A" - Bus Off	LIN Bus circuit fault No communication on the LIN Bus	NOTE: This circuit uses shielded cable Refer to the electrical circuit diagrams and check the LIN bus circuit for harness damage
B10AE-11	Headlamp Leveling Motor - Circuit short to ground	Headlamp Leveling Motor control circuit short to ground	NOTE: Circuit - DCM R/L - Refer to the electrical circuit diagrams and check headlamp leveling motor control circuit for short to ground
B10AE-12	Headlamp Leveling Motor - Circuit short to battery	Headlamp Leveling Motor control circuit short to power	NOTE: Circuit - DCM R/L - Refer to the electrical circuit diagrams and check headlamp leveling motor control circuit for short to power
B10AE-64	Headlamp Leveling Motor - Signal plausibility failure	Signal plausibility failure (voltage out of range)	NOTE: Circuit - DCM R/L - Refer to the electrical circuit diagrams and check headlamp leveling motor circuits for failure. Disconnect one headlamp connector, clear DTC and re-test. If DTC cleared, suspect headlamp leveling control module or circuits to the disconnected side of the failure. If DTC remains, reconnect first headlamp and disconnect second, clear DTC and re-test. If DTC cleared, suspect headlamp leveling control module or circuits to the disconnected side of the failure. If DTC remains, suspect common circuits of the failure. Refer to the electrical circuit diagrams and check as required
B1A59-11	Sensor 5 Volt Supply - Circuit short to ground	Headlamp Leveling Sensor 5 volt supply circuit short to ground	NOTE: Circuit - DCM R/L - Refer to electrical circuit diagrams and check headlamp leveling sensor 5 volt supply circuit for short to ground
B1A59-12	Sensor 5 Volt Supply - General Electrical Failure	Headlamp Leveling Sensor 5 volt supply circuit short to power	NOTE: Circuits - SVSF+ - SVSR+ - Refer to electrical circuit diagrams and check headlamp leveling sensor 5 volt supply circuit for short to power
B1D64-01	Left Headlamp Swivelling Motor - General Electrical Failure	Internal Headlamp Motor Fault Internal Headlamp Circuit Fault	NOTE: Circuit - LIN - Using the manufacturer approved diagnostic system perform an on demand self test, look for any errors in movement (compare with other headlamp) and visually inspect the lamp for internal damage or dislocation (ball joints out). Refer to the electrical circuit diagrams and check for circuit fault between the headlamp leveling control module and the headlamp swivelling motor. If no mechanical or circuit faults are evident, suspect headlamp internal fault, replace as required
B1D64-87	Left Headlamp Swivelling Motor - Missing message	Missing message	NOTE: Circuit - LIN - Using the manufacturer approved diagnostic system perform an on demand self test, look for any errors in movement (compare with other headlamp) and visually inspect the lamp for internal damage or dislocation (ball joints out). Refer to the electrical circuit diagrams and check for circuit fault between the headlamp leveling control module and the headlamp swivelling motor. If no mechanical or circuit faults are evident, suspect headlamp internal fault, replace as required
B1D65-01	Right Headlamp Swivelling Motor - General electrical failure	Internal Headlamp Motor Fault Internal Headlamp Circuit Fault	NOTE: Circuit - LIN - Using the manufacturer approved diagnostic system perform an on demand self test, look for any errors in movement (compare with other headlamp) and visually inspect the lamp for internal damage or dislocation (ball joints out). Refer to the electrical circuit diagrams and check for circuit fault between the headlamp leveling control module and the headlamp swivelling motor. If no mechanical or circuit faults are evident, suspect headlamp internal fault, replace as required
B1D65-87	Right Headlamp Swivelling Motor - Missing message	Missing message	NOTE: Circuit - LIN - Using the manufacturer approved diagnostic system perform an on demand self test, look for any errors in movement (compare with other headlamp) and visually inspect the lamp for internal damage or dislocation (ball joints out). Refer to the electrical circuit diagrams and check for circuit fault between the headlamp leveling control module and the headlamp swivelling motor. If no mechanical or circuit faults are evident, suspect headlamp internal fault, replace as required
B1D68-00	Left Headlamp Swivelling Feedback Sensor - No sub type information	Internal Headlamp Sensor Fault Internal Headlamp Circuit Fault	Using the manufacturer approved diagnostic system perform an on demand self test, look for any errors in movement (compare with other headlamp) and visually inspect the lamp for internal damage or dislocation (ball joints out). Refer to the electrical circuit diagrams and check for circuit fault between the headlamp leveling control module and the headlamp swivelling feedback sensor. If no mechanical or circuit faults are evident, suspect headlamp internal fault, replace as required
B1D69-00	Right Headlamp Swivelling Feedback Sensor - No sub type information	Internal headlamp sensor fault Internal headlamp circuit fault	Using the manufacturer approved diagnostic system perform an on demand self test, look for any errors in movement (compare with other headlamp) and visually inspect the lamp for internal damage or dislocation (ball joints out). Refer to the electrical circuit diagrams and check for circuit fault between the headlamp leveling control module and the headlamp swivelling feedback sensor. If no mechanical or circuit faults are evident, suspect headlamp internal fault, replace as required
C1A03-12	Left Front Height Sensor - Circuit short to battery	Left front height sensor circuit short to power	NOTE: Circuit - SF ANALOGUE - Refer to the electrical circuit diagrams, and check left front height sensor circuit for short to power
C1A03-14	Left Front Height Sensor - Circuit short to ground or open	Left front height sensor circuit short to ground or open circuit	NOTE: Circuit - SF ANALOGUE - Refer to the electrical circuit diagrams, and check left front height sensor circuit for short to ground or open circuit
C1A05-12	Left Rear Height Sensor - Circuit short to battery	Left rear height sensor circuit short to power	NOTE: Circuit - SR ANALOGUE - Refer to the electrical circuit diagrams, and check left rear height sensor circuit for short to power
C1A05-14	Left Rear Height Sensor - Circuit short to ground or open	Left rear height sensor circuit short to ground or open circuit	NOTE: Circuit - SR ANALOGUE - Refer to the electrical circuit diagrams, and check left rear height sensor circuit for short to ground or open circuit
U0001-88	High Speed CAN Communication Bus - Bus off	CAN bus off CAN bus circuit fault	Check other control modules for related DTCs. Carry out the CAN network integrity test using the manufacturer approved diagnostic system
U0101-00	Lost communication with TCM - No sub type information	Lost communication with the transmission control module CAN network fault	Check the transmission control module for stored DTCs. Using the manufacturer approved diagnostic system, complete the CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network between the headlamp leveling control module and the transmission control module
U0121-00	Lost communication with Anti-lock Brake System (ABS) Control Module - No sub type information	Lost communication with the anti-lock brake system control module CAN network fault	Check the anti-lock brake system control module for stored DTCs. Using the manufacturer approved diagnostic system, complete the CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network between the headlamp leveling control module and the anti-lock brake system control module
U0126-00	Lost communication with Steering Angle Sensor Module - No sub type information	Lost communication with the steering angle sensor module CAN network fault	Check the steering angle sensor module for stored DTCs. Using the manufacturer approved diagnostic system, complete the CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network between the headlamp leveling control module and the steering angle sensor module
U0140-00	Lost communication with Body Control Module - No sub type information	Lost communication with the central junction box CAN network fault	Check the central junction box for stored DTCs. Using the manufacturer approved diagnostic system, complete the CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network between the headlamp leveling control module and the central junction box
U0300-00	Internal Control Module Software Incompatibility - No sub type information	Car configuration file information incompatible to the headlamp leveling control module	NOTE: The car configuration file parameters required are 'Vehicle type', 'Headlamp type', 'Gearbox type' and 'Dayrunning light' Re-configure the car configuration file as required using the manufacturer approved diagnostic system. Clear DTC and re-test. If the DTC remains suspect the headlamp leveling control module
U0402-00	Invalid Data Received From Transmission Control Module - No sub type information	Invalid data received from the transmission control module Transmission component fault	Check the transmission control module for related DTCs and refer to the relevant DTC index
U0415-00	Invalid Data Received From Anti-Lock Brake System (ABS) Control Module - No sub type information	Invalid data received from anti-lock brake system control module Anti-lock brake system component fault	Check the anti-lock brake system control module for related DTCs and refer to the relevant DTC index
U0422-00	Invalid data from Body Control Module - No sub type information	Invalid signal from the Central Junction Box Central junction box fault	Check the central junction box 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 the steering angle sensor module Steering Angle Sensor Module fault	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	NOTE: The car configuration file parameters required are 'Vehicle type', 'Headlamp type', 'Gearbox type' and 'Dayrunning light' Re-configure the car configuration file as required using the manufacturer approved diagnostic system. Clear DTC and re-test. If the DTC remains suspect the headlamp leveling control module
U2101-00	Control Module Configuration Incompatible - No sub type information	Car configuration file information incompatible to the headlamp leveling control module	Check the correct headlamp leveling control module is installed to vehicle specification. Refit original or replace the module as required
U3003-16	Battery Voltage - Circuit voltage below threshold	The power supply to the headlamp leveling control module has been below 9 volts for more than 1000 milliseconds	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 the headlamp leveling control module
U3003-17	Battery Voltage - Circuit voltage above threshold	The power supply to the headlamp leveling control module has been above 16 volts for more than 1000 milliseconds	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 the headlamp leveling control module
U3003-62	Battery Voltage - Signal compare failure	Difference in battery voltage, of 2 volts or more, between the central broadcast voltage (via CAN bus) and headlamp leveling control module	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 the central junction box and the headlamp leveling control module