Fault overview
PROBLEM SYMPTOM
| Fault code | Fault text | Fault effect |
|---|---|---|
| 21 | Ouside temperature sensor Open circuit/short to ground | Substitute value |
| 22 | Interior temperature sensor Open circuit/short to ground | Substitute value |
| 23 | Footwell blower outlet sensor Open circuit/ short to ground | Substitute value |
| 24 | Supply voltage terminal 15 Voltage too high/ too low | Function failure |
| 25 | Supply voltage (5 V) Voltage too high/ too low | Entry of all flaps in fault memory, system error, no control |
| 26 | Temperature mixing valve motor Signal unclear | Flap adjustment not possible |
| 27 | Central flap motor Signal unclear | Flap adjustment not possible |
| 28 | Footwell defrost flap motor Signal unclear | Flap adjustment not possible |
| 29 | Outside air/recirculation air motor Signal unclear | Flap adjustment not possible |
| 30 | AC signal unclear | Air-conditioning failure |
| 31 | Fresh-air blower motor voltage too low/ too high | Disturbance of function |
| 32 | Control unit control unit fault | No control |
| 34 | Air-conditioning CAN BUS off | - |
| 35 | Interface for instrument cluster (see INSTRUMENT CLUSTER FS ) | Substitute values |
| 36 | CAN-timeout instrument cluster | Substitute values |
| 37 | CAN signal PCM | Substitute values |
| 38 | CAN-timeout PCM | Substitute values |