| Number | X-pin, colour | Description |
|---|---|---|
| X671 | 5-pin, black | Plug connector Output stage |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | M | Ground | Blower motor |
| 2 | E | Component supply (terminal 15) | Heating blower relay |
| 3 | E | Signal Output stage | Heating and A/C control module |
| 4 | M | Ground | Ground point |
| 5 | A | Positive activation Blower motor | Blower motor |