Heating System H02

Fault code 25

Supply voltage sensors (5 V) - too high/too low/short circuit to B+/ground short

Diagnostic conditions
- Ignition on
- No control module fault 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 four flap sensors
- one of the four flap servo motors faulty
- Air-conditioning system regulator faulty

Affected pins
Connector B, pin 9 and pin 20

Diagnosis/troubleshooting