Fault Code 27

Fault Code 27

Central 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 central flap
- Central flap stiff
- Central flap drive motor faulty
- Air-conditioning system regulator faulty

Affected pins
Plug B, pins 9, 14 and 20
Plug D, pins 4 and 12

Diagnosis/troubleshooting

Work Instruction 1 - 4:

Work Instruction 5 - 12: