Work Instruction 5 - 12
Fault Code 28
Fault Code 28
Footwell/Defroster 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 footwell/defroster flap
- Footwell/defroster flap stiff
- Footwell/defroster flap drive motor
- Air-conditioning system regulator faulty