Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information HCM-U300316

Condition
The Headlamp Control Module (HCM) checks its own system voltage by comparing the DC voltage to the system voltage in the Central electronic module (CEM). Information about the system voltage in the Central electronic module (CEM) is transmitted via CAN to the Headlamp Control Module (HCM).
The diagnostic trouble code (DTC) is stored if the control module detects that:
- Direct voltage to control module is lower than 9.0 V.
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
- None.

Possible source

- Contact resistance, oxidation or open-circuit in the terminals.
- Low battery
- Short-circuit to ground in the power supply cable.

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