Diagnostic Trouble Code (DTC) Information HCM-U010000

Condition

The control module is continually supplied with necessary information from the Engine control module (ECM) via CAN communication. The control module checks the communication with the Engine control module (ECM).

The diagnostic trouble code (DTC) is stored if the control module detects that:

No communication with the Engine control module (ECM).

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.

Fig 1: Identifying Headlamp Control Module (HCM)

Courtesy of VOLVO CARS CORPORATION

Substitute Value

None.

Possible Source

Fault-trace in transmitting control module.

Fault symptom[s]

Active Bi-Xenon light; No Functionality
Automatic vertical aim control does not work