Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information HCM-8F20

Condition
The Headlamp Control Module (HCM) checks the signal from the position sensors.
The diagnostic trouble code (DTC) is stored if the control module detects:
- Incorrect signal from rear position sensor.
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
- Short-circuit to supply voltage in the signal cable.

Fault symptom[s]
- Text window and warning symbol/Text message
- Headlights/Headlight aim is off