Functional networking
In the following graphic, the functional networking for the integrated automatic heating/air conditioning system is displayed.
| Item | Explanation |
|---|---|
| 1 | Refrigerant pressure sensor |
| 2 | Water valve (F3x only) |
| 3 | Air conditioning compressor |
| 4 | Power distribution box, engine compartment |
| 5 | Front fuse and relay module |
| 6 | Automatic air recirculation control sensor |
| 7 | Front Electronic Module (FEM) |
| 8 | Integrated automatic heating/air conditioning system (IHKA) |
| 9 | Rear compartment ventilation grille |
| 10 | Relays |
| 11 | Rear Electronic Module (REM) |
| 12 | Evaporator temperature sensor |
| 13 | Footwell temperature sensor, right |
| 14 | Footwell temperature sensor, left |
| 15 | Mixing flap drive, left |
| 16 | Mixing flap drive, right |
| 17 | Recirculated-air-flap motor |
| 18 | Electric auxiliary heater |
| 19 | Front right stratification-flap motor |
| 20 | Front left stratification-flap motor |
| 21 | Rear compartment flap motor |
| 22 | Front right footwell flap motor |
| 23 | Front left footwell flap motor |
| 24 | Defroster flap motor |
| 25 | Control box of heating and air conditioning system (connections dependent on equipment) |
| 26 | Audio control panel (connections depend on vehicle equipment levels) |
| 27 | Ventilation temperature sensor, front right |
| 28 | Front center ventilation grille |
| 29 | Ventilation temperature sensor, front left |
| 30 | Rain-light-solar-condensation sensor |
| 31 | Blower output stage |
| 32 | Blower motor |