2008 Volvo XC70FACTORY OEM SERVICE PROCEDURE

Headlamp Control Module (HCM) DTCS

HEADLAMP CONTROL MODULE (HCM) - DTC INDEX

DTC Volvo Code Description
B103C HCM-B103C04 Left Headlamp Control. General Failure Information. System Internal Failures
B103D HCM-B103D04 Right Headlamp Control. General Failure Information. System Internal Failures
B1040 HCM-B104076 Lamp Unit. Mechanical Failures. Wrong mounting position
B1041 HCM-B104154 Levelling Control. System Programming Failures. Missing calibration
B1042 HCM-B104251 Automatic Vertical Aim Control. System Programming Failures. Not programmed
B1043 HCM-B104301 Front Axle Sensor. General Failure Information. General electrical failure
B1043 HCM-B10431C Front Axle Sensor. General Electrical Failures. Circuit voltage out of range
B1044 HCM-B104401 Rear Axle Sensor. General Failure Information. General electrical failure
B1044 HCM-B10441C Rear Axle Sensor. General Electrical Failures. Circuit voltage out of range
B1A57 HCM-B1A5701 Left Headlamp Levelling Motor Circuit. General Failure Information. General electrical failure
B1A58 HCM-B1A5801 Right Headlamp Levelling Motor Circuit. General Failure Information. General electrical failure
B1D64 HCM-B1D6401 Left Headlamp Swivelling Motor Circuit. General Failure Information. General electrical failure
B1D64 HCM-B1D6477 Left Headlamp Swivelling Motor Circuit. Mechanical Failures. Commanded position not reachable
B1D65 HCM-B1D6501 Right Headlamp Swivelling Motor Circuit. General Failure Information. General electrical failure
B1D65 HCM-B1D6577 Left Headlamp Swivelling Motor Circuit. Mechanical Failures. Commanded position not reachable
B1D66 HCM-B1D6601 Left Headlamp Power Module. General Failure Information. General electrical failure
B1D67 HCM-B1D6701 Right Headlamp Power Module. General Failure Information. General electrical failure
B1D68 HCM-B1D6801 Left Headlamp Swivelling Feedback Sensor Circuit. General Failure Information. General electrical failure
B1D69 HCM-B1D6901 Right Headlamp Swivelling Feedback Sensor Circuit. General Failure Information. General electrical failure
U0001 HCM-U000100 High Speed CAN Communication Bus. General Failure Information. No sub type information
U0100 HCM-U010000 Lost Communication With Engine control module. Bus Signal/Message Failures. Missing message
U0121 HCM-U012100 Lost Communication With Brake Control Module. Bus Signal/Message Failures. Missing message
U0122 HCM-U012200 Lost Communication With Suspension module. Bus Signal/Message Failures. Missing message
U0126 HCM-U012600 Lost Communication With Steering Angle Sensor Module. Bus Signal/Message Failures. Missing message
U0140 HCM-U014000 Lost Communication With Central electronic module. General Failure Information. No sub type information
U0300 HCM-U030000 Internal Control Module Software Incompatibility. General Failure Information. No sub type information
U0401 HCM-U040181 Invalid Data Received From Engine control module. Bus Signal/Message Failures. Invalid serial data received
U0418 HCM-U041881 Invalid Data Received From Brake Control Module. Bus Signal/Message Failures. Invalid serial data received
U0428 HCM-U042881 Invalid Data Received From Steering Angle Sensor Module. Bus Signal/Message Failures. Invalid serial data received
U043A HCM-U043A86 Invalid Data Received From Suspension Control Module "B". Bus Signal/Message Failures. Signal invalid
U0542 HCM-U054283 Invalid Data Received From Headlamp Control Module "A". Bus Signal/Message Failures. Value of signal protection calculation incorrect
U0542 HCM-U054286 Invalid Data Received From Headlamp Control Module "A". Bus Signal/Message Failures. Signal invalid
U0543 HCM-U054383 Invalid Data Received From Headlamp Control Module "B". Bus Signal/Message Failures. Value of signal protection calculation incorrect
U0543 HCM-U054386 Invalid Data Received From Headlamp Control Module "B". Bus Signal/Message Failures. Signal invalid
U1A38 HCM-U1A3801 Lost Communication With Left Headlamp Module. General Failure Information. General electrical failure
U1A38 HCM-U1A3887 Lost Communication With Left Headlamp Module. Bus Signal/Message Failures. Missing message
U1A39 HCM-U1A3901 Lost Communication With Right Headlamp Module. General Failure Information. General electrical failure
U1A39 HCM-U1A3987 Lost Communication With Right Headlamp Module. Bus Signal/Message Failures. Missing message
U2100 HCM-U210000 Control Module Not Configured. General Failure Information. No sub type information
U2101 HCM-U210100 Control Module Configuration Incompatible. General Failure Information. No sub type information
U3000 HCM-U300004 Control Module. General Failure Information. System Internal Failures
U3003 HCM-U300316 Battery Voltage. General Electrical Failures. Circuit voltage below threshold
U3003 HCM-U300317 Battery Voltage. General Electrical Failures. Circuit voltage above threshold
U3003 HCM-U300362 Battery Voltage. Algorithm Based Failures. Signal compare failure
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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