Structure and inner electrical connection
The heating and air conditioning system control box is connected to the vehicle electrical system by means of a 4-pin plug connection.
NOTE:
The electrical connection varies depending on the headunit or radio version. Observe wiring diagram!
The request signals from the audio control panel are sent to the air conditioning control unit via a local interconnect network bus.
The heating and air conditioning system control unit supplies the heating and air conditioning system control box with terminal 30F and terminal 31E (electronics earth/ground).
| Item | Explanation |
|---|---|
| 1 | Audio control panel |
Pin assignments
| Pin | Explanation |
|---|---|
| Terminal 30F | Terminal 30F switch-off in event of fault |
| Terminal 31E | Terminal 31, electronics earth (ground) |
| LIN | LIN bus |
| 1 pin not used. | |