Fault Code 0710

Fault code 0710

Defrost flap 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
- No or incorrect basic setting
- Short circuit to ground
- Open circuit/short circuit to B+
- Servo motor flap stiff
- Servo motor faulty
- Front air-conditioning system regulator faulty

Affected pins
- 2-zone and 4-zone air conditioning systems

Air-conditioning system regulator control module, front: Plugs A, C and E
- Plug A: Pin 2 'Defrost flap (feedback signal lead, defrost flap servo motor)'
- Plug C: Pin 6 'Defrost flap (defrost flap servo motor OPEN)'
- Plug C: Pin 24 'Defrost flap (defrost flap servo motor CLOSED)'
- Plug E: Pin 1 '5 V reference voltage'
- Plug E: Pin 8 'Ground signal'
- Manual air conditioning

Air-conditioning system regulator control module, front: Plugs A, C and E
- Plug A: Pin 1 'Defrost flap (defrost flap servo motor CLOSED)'
- Plug A: Pin 9 'Defrost flap (defrost flap servo motor OPEN)'
- Plug C: Pin 15 'Defrost flap (feedback signal lead, defrost flap servo motor)'
- Plug E: Pin 1 '5 V reference voltage'
- Plug E: Pin 8 'Ground signal'

Diagnosis/Troubleshooting.
- 2-zone and 4-zone air conditioning systems












- Manual air conditioning