| Number | X-pin, colour | Description |
|---|---|---|
| X18787 | 10-pin, black | Pin assignments at intermediate connector Plug connector, ventilation unit |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | Light signal, terminal 58 | Connector terminal 58 | |
| 2 | Not used | ||
| 3 | Not used | ||
| 4 | Component ground | Connector terminal 31 | |
| 5 | Component supply (terminal 15) | Heating and A/C control module | |
| 6 | Component supply (terminal 15) | Heating and A/C control module | |
| 7 | Component supply (terminal 15) | Heating and A/C control module | |
| 8 | Actual value mixing air actuator | Heating and A/C control module | |
| 9 | Sensor ground (terminal 31) | Connector terminal 31 | |
| 10 | Not used | ||