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Fault Code 28, - As of My 2002



Fault Code 28, - As Of MY 2002

Footwell/defrost valve motor - No reaction to activation, signal unclear

Diagnostic conditions
- Ignition on
- No control module fault stored
- No fault with power supply sensors (5 V) stored

Possible cause of fault
- Short circuit to B+/ground/between one another or open circuit in the wiring between the air-conditioning system regulator and the footwell/defrost valve.
- Footwell/defrost valve stiff
- Servo motor for footwell/defrost valve faulty
- Air-conditioning system regulator faulty

Affected pins
Connector B, pin 3, pin 9, and pin 20
Plug D, pin 3 and pin 11

Diagnosis/troubleshooting


Diagnosis/troubleshooting (Part 1):




Diagnosis/troubleshooting (Part 2):




Diagnosis/troubleshooting (Part 3):




Diagnosis/troubleshooting (Part 4):