Structure and inner electrical connection
The air-distribution-flap motor is connected via a 4-pin plug connection with the control unit of the heater/air conditioning system.
The flap motors are switched in series on the LIN bus. The pin assignment depends on the installation location of the flap motor. If the flap motor is the last flap motor in the topology in the series connection of the LIN bus, only 3 pins are used.
The graphic below shows the flap motor with 4 pins used.
| Index | Explanation |
|---|---|
| 1 | Electronic component |
| 2 | Air distribution flap motor |
PIN ASSIGNMENT SPECIFICATION
| Pin | Explanation |
|---|---|
| Terminal 31L | Terminal 31L, load earth |
| LIN in | LIN bus input |
| LIN out* | LIN bus output |
| U | Supply voltage |
The graphic below shows the flap motor with 3 pins used.
| Index | Explanation |
|---|---|
| 1 | Electronic component |
| 2 | Air distribution flap motor |
PIN ASSIGNMENT SPECIFICATION
| Pin | Explanation |
|---|---|
| Terminal 31L | Terminal 31L, load earth |
| LIN | LIN bus |
| U | Supply voltage |
| 1 pin not used | |