Fault Code 28

Fault Code 28

Footwell/defrost Flap Motor - No reaction to activation, signal unclear

Diagnostic Conditions:
- Ignition on

NOTE:
- No control module fault stored
- No fault with supply voltage (5 V)

Possible cause of fault:
- Short circuit to voltage/ground or open circuit in the wiring between the air-conditioning system regulator and the footwell/defrost flap
- Servo motor for footwell/defrost flap faulty or flap does not open/close smoothly.

Affected Terminals:
- Plug B, terminals 3, 9 and 20
- Plug D, terminals 3 and 11

Diagnosis/troubleshooting

Work Instruction 1 - 2:

Work Instruction 3 - 5:

Work Instruction 6 - 11: