The headlamp levelling switch signal from the main light switch module is missing or faulty.
â–¶ How to fix
1. Check harness to the main light switch module (pin C35 and C36). 2. Replace the main light switch module.
What you'll see
No driver-visible symptom recorded.
System reaction
The headlamp levelling is controlled as follows: 1. In case a valid value have been received during the current driving cycle the last valid position is used. 2. In case no valid value have been received during the current driving cycle "Position 1" is used.
Diagnostic depth
Detection
The headlamp levelling switch signal from the main light switch module is missing or faulty.
Possible cause
The harness to the main light switch module may be broken or short cicuited. The main light switch module may be broken.