Air Conditioning
Fault code 0538Reference voltage (5 V sensor supply voltage)
Diagnostic conditions
- Ignition on for min. 10 s.
- Battery voltage OK (11.4 to 14.5 V)
- Internal function test completed on air-conditioning system regulator control module
Possible causes of fault
- Short circuit to B+
- Short circuit to ground
- Air-conditioning system regulator faulty
Affected pins
- 2-zone and 4-zone air conditioning systems
Front air-conditioning system regulator control module: Plug E, pin 1 '5 V reference voltage'
- Manual air conditioning
Front air-conditioning system regulator control module: Plug E, pin 1 '5 V reference voltage'
Diagnosis/troubleshooting
- 2-zone and 4-zone air conditioning systems
- Manual air conditioning
