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

Work Instruction 1 - 4:

Work Instruction 5 - 6:

Work Instruction 7 - 10: