B3934

B3934 52

Mirror Motor Potentiometer, Motion in Reverse Order Detected







Fault symptom
- Memory functions not working

On-board diagnosis

Type of diagnosis:
- Each time the door module checks if the electric mirror button is depressed or not.

Enable criteria:
- When electric mirrors are operated.

Fault criteria:
- When the electric mirror position potentiometer detects movement in the opposite direction in relation to the engine.

System reaction to a fault:
- Memory functions not working
- Manual electric mirror operation working.

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.