Functional networking
In the following graphic, the functional networking for the integrated automatic heating/air conditioning system is displayed.
| Index | Explanation |
|---|---|
| 1 | Electronic Gearbox Control |
| 2 | Digital Engine Electronics (DME) or Digital Diesel Electronics (DDE) |
| 3 | Electric fan |
| 4 | Electric fan relays |
| 5 | Front power distribution box |
| 6 | Air conditioning compressor with control valve |
| 7 | Refrigerant pressure sensor |
| 8 | AUC sensor |
| 9 | Power distributor in junction box |
| 10 | Junction Box Electronics (JBE) |
| 11 | Rear stratification potentiometer |
| 12 | Heated rear window relay |
| 13 | Wave trap |
| 14 | Controller (CON) |
| 15 | PTC (diesel fuel only) |
| 16 | Heated rear window |
| 17 | Air distribution flap motor (IHKA-Basic only) |
| 18 | Defroster flap motor (IHKA-High only) |
| 19 | Footwell flap motor (IHKA-High only) |
| 20 | Right mixing flap drive (IHKA-High only) |
| 21 | Rear compartment stratification flap motor (IHKA-High only) |
| 22 | Mixing flap motor, left |
| 23 | Stratification flap motor (IHKA-High only) |
| 24 | Ventilation flap motor (IHKA-High only) |
| 25 | Fresh air/recirculated air flap motor |
| 26 | Evaporator temperature sensor |
| 27 | Ventilation temperature sensor |
| 28 | Footwell temperature sensor |
| 29 | IHKA control unit |
| 30 | Left ventilation outlet lighting |
| 31 | Stratification adjuster with lighting |
| 32 | Right ventilation outlet lighting |
| 33 | Footwell module (FRM) |
| 34 | Central gateway module (ZGM) |
| 35 | Central Information Display (CID) |
| 36 | Rain-light-solar-condensation sensor |
| 37 | Blower motor and blower output stage |
| 38 | Roof function center (FZD) |
| LIN | local interconnect network bus |
| PT-CAN | Powertrain CAN |
| Terminal 30F | Shutdown of terminal 30F in event of failure |
| Terminal 31L | Terminal 31L, load earth |
| Body CAN | Body CAN |
| K-CAN2 | Body CAN2 |
| Terminal 30 | Terminal 30 permanent positive |
| Terminal 15N | Switch off terminal 15N with after-run |
| D-CAN | Diagnosis-on-CAN |
| Terminal 30B | Terminal 30B, base operation |
| * The stepper motors are switched in series on the LIN bus. | |