Fault Code 1189

Fault code 1189

Servo motor for front air distribution

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 display
- No or incorrect basic setting/adaptation
- Short circuit to ground
- Open circuit/short circuit to B+

Affected pins
Air-conditioning system regulator control module, front: Plugs A and E
- Plug A: Pin 14 'Air flap (feedback signal lead for temperature valve)'
- Plug A: Pin 23 'Air flap (right temperature valve OPEN)'
- Plug A: Pin 24 'Air flap (right temperature valve CLOSED)'
- Plug E: Pin 1 '5 V reference voltage'
- Plug E: Pin 8 'Ground sensor'

Diagnosis/troubleshooting