Daytime Running Lamp: Testing and Inspection

Checking the daytime running lamps

Checking the daytime running lamps

Note! If fault code CEM-8C10, CEM-8C11, CEM-2F60, or CEM-2F61 is stored, troubleshoot these first.

Note! This symptom troubleshooting only applies to vehicles equipped with daytime running lights.

Daytime running lights are controlled by the Central electronic module (CEM). The relay for daytime running lights, which is the same that supplies voltage to the front fog lights in other vehicles, can only be diagnosed in Central electronic module (CEM).
However, there are no diagnostics for the circuit from the relay to the bulbs so that no fault codes can be stored in case of any problems with the bulb or circuit.
If the customer has problems with the daytime running lights the cause may be:
- Fault position Light switch module (LSM).
- Damaged fuse.
- Cable for voltage supply to relevant daytime running light is short-circuited to ground.
- Open circuit on cable for power supply of relevant daytime running light.
- Cable for voltage supply to relevant daytime running light is short-circuited to voltage.
- Daytime running light missing or broken.
- Damaged twilight sensor.

Other information
Checking wiring and terminals Checking Wiring and Terminals

Continue - DONE

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