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

Diagnosis/troubleshooting (Part 1):

Diagnosis/troubleshooting (Part 2):

Diagnosis/troubleshooting (Part 3):