Fault Code 0929

Fault code 0929

Passenger's door lock (checkback)

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

Diagnostic conditions
- Ignition on
- Battery voltage Ok (11.4 to 14.5 V)
- Internal function test on driver's door control unit
- Passenger's door lock 'Unlock'
- Passenger's door lock 'Lock'
- Passenger's door lock 'Secure

Possible causes of fault
- Passenger's door lock could not be changed to required state
- Passenger's door lock faulty
- Open circuit

Affected pins
Passenger's door control unit: Plug C
- Pin 3 'central locking, Safe lock'

Diagnosis/troubleshooting

NOTE:
Visual inspection: In the next troubleshooting section, please check first that the affected pins on the passenger's door control unit plug connection are neither damaged nor corroded. The wiring and plugs of the affected components must also be checked for external damage and proper contact Repair damaged or corroded pins it 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.

NOTE: This fault is detected if the required target state is not reached within 2 seconds.