Fault Code 1271

Fault code 1271

Temperature valve servo motor

Diagnostic conditions
- Ignition on
- 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+/ground/to each other or open circuit
- Servo motor flap stiff
- Servo motor faulty
- Air-conditioning system regulator faulty

Affected pins
Air-conditioning system regulator control module, front: Plugs A and E
- Plug A: Pin 13 'Temp. valve (feedback signal lead for temperature valve)'
- Plug A: Pin 8 'Temp. valve (right temperature valve OPEN)'
- Plug A: Pin 16 'Temp. valve (right temperature valve CLOSED)'
- Plug E: Pin 1 '5 V reference voltage'
- Plug E: Pin 8 'Ground sensor'

Diagnosis/troubleshooting