Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information HCM-B103C04

Condition
The Headlamp Control Module (HCM) communicates with the Left headlamp control unit (LHCU).
The diagnostic trouble code (DTC) is stored if the control module detects that:
- The Left headlamp control unit (LHCU) detects an internal fault.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Ignition switch position II.

Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.





Substitute value
- Shortest headlamp range will be used.

Possible source
- Damaged Left headlamp control unit (LHCU).

Fault symptom[s]
- Faulty low beam adjustment
- Automatic vertical aim control does not work
- Active Bi-Xenon light; No Functionality
- Text window and warning symbol/Text message