Fault Code 0940

Fault code 0940

Adjustment motor for passenger's door mirror

NOTE: This fault was detected by the 'passenger's door' control module.

Diagnostic conditions
- Ignition on
- Battery voltage OK (11.4 to 14.5 V)
- Internal function test on passenger's door control module
- Move passenger's door mirror in all directions using mirror adjustment switch

Possible causes of fault
- Adjustment motor for passenger's door mirror faulty
- Wiring faulty

Affected pins
Passenger's door control module, plug B:
- Pin 1 'adjustment motor X/Y'
- Pin 2 'adjustment motor X'
- Pin 10 'adjustment motor Y'

NOTE: Two different adjustment motors are fitted.

'Type 1': adjustment motor without seat memory






'Type 2': adjustment motor with seat memory










Diagnosis/troubleshooting

NOTE:
Visual inspection: In the next troubleshooting section, please check first that the affected pins on the passenger's door control module plug connection are neither damaged nor corroded. The wiring and plugs of the affected components must also be checked for external damage and correct contacts. Repair damaged or corroded pins if possible, otherwise replace affected pins. Repair or replace damaged wires.

NOTE:
Sporadic faults: In the event of faults that occur sporadically, the wiring positions that are linked to moving parts on and in the vehicle must be checked for each system. Various statuses that can cause faults must be simulated with the help of the wiring diagram.

NOTE:
Battery voltage: A battery voltage of between 11.4 and 14.5 V is required for the following troubleshooting procedure. This must be checked and provided, if necessary. On the vehicle electrical system, the voltage to the fuse (input side) must be guaranteed.