| Number | X-pin, color | Description |
|---|---|---|
| X18787 | 10-pin, black | Pin assignments at in-line connector Plug connector, ventilation unit |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | Terminal 58 light signal | Terminal 58 splice | |
| 2 | Not used | ||
| 3 | Not used | ||
| 4 | Component ground | Terminal 31 splice | |
| 5 | Component power (terminal 15) | Heating and A/C control module | |
| 6 | Component power (terminal 15) | Heating and A/C control module | |
| 7 | Component power (terminal 15) | Heating and A/C control module | |
| 8 | Mixing air actuator actual value | Heating and A/C control module | |
| 9 | Sensor ground (terminal 31) | Terminal 31 splice | |
| 10 | Not used | ||