Fault Code 29

Fault Code 29

Outside Air/Recirculation Air Flap Motor - No Reaction To Activation, Signal Implausible

Diagnostic conditions
- Ignition on
- No control unit fault stored
- No sensor supply voltage fault stored (5 V)

Possible cause of fault
- Short circuit to B+/ground/between wires or open circuit in wiring between air-conditioning system regulator and outside air/recirculation air flap
- Outside air/recirculation air flap stiff
- Outside air/recirculation air flap drive motor faulty
- Air-conditioning system regulator faulty

Affected pins
Plug B, pins 4, 9 and 20
Plug D, pins 5 and 13

Diagnosis/troubleshooting

Work Instruction 1 - 3:

Work Instruction 4 - 8:

Work Instruction 9 - 12: