Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information HCM-2987

Condition
The control module is continually supplied with necessary information from the Brake control module (BCM) via CAN communication. The control module checks the communication with the Brake control module (BCM).
The diagnostic trouble code (DTC) is stored if the control module detects that:
- Interrupted or missing communication with the Brake control module (BCM).
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Activated control module.

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
- Limited functionality in the Headlamp Control Module (HCM) (Limp-home).

Possible source
- Fault-trace in transmitting control module.

Fault symptom[s]
- Text window and warning symbol/Text message
- Headlights/Vertical adjustment not influenced by steering wheel
- Headlights/Headlight aim is off