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 unit

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 unit, 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)
- Connector E: Pin 1 5 V reference voltage
- Connector E: Pin 8 Ground sensor

Diagnosis/troubleshooting

Work Instruction 1 - 4:

Work Instruction 5 - 6:

Work Instruction 7 - 10: