AHL / B3440 05
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Message appears in display.
Headlamp beam adjustment not working.
RH Stepper Motor Circuit, Open/Short to B+
Fault symptom
Message appears in display.
Headlamp beam adjustment not working.
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Stepping motor activated. |
| Battery voltage greater than 9 V. |
Fault criteria:
| Control module output short-circuit to B+/open-circuit. |
System reaction to a fault:
| Control module outputs to stepping motor switched off. |
Checking the wiring harness
Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force.
Diagnostic help
Before fault diagnosis begins, read the document "Safety and handling directions, xenon lights" under Technical description.
