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LOCATION:    1.3 Headlamp Range Adjustment (HRA)   >   13 Diagnosis - Complaint Related Diagnostic Chart


Diagnosis - Complaint Related Diagnostic Chart

Complaint/Problem Possible cause Test step/Remedy 1)
Headlamp range adjustment does not function. Model 129 without ADS and model 140
Rear axle sensor (A51) (headlamp range adjustment)
Front axle sensor (A52) (headlamp range adjustment)

Model 129 with ADS
Front axle level sensor (B22/2)
Rear axle level sensor (B22/3)

Wiring
Headlamp range adjustment motor (E1m1)
Headlamp range adjustment motor (E2m1)
Headlamp range adjustment control module (N71)
Test with HHT
Headlamprange adjustment can not be tested using the HHT:
- No communication between HHT and headlamp range adjustment control module (N71).
Wiring
Voltage supply		 23 1.0
1) Observe Preparation for Test, see 22.



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