| Number | X-pin, colour | Description |
|---|---|---|
| X2090 | 2 -pin, Black | Plug connector Changeover valve, radiator shutter |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | M | Terminal 31 | Ground connector |
| 2 | E | Signal, temperature switch radiator shutter | Temperature switch, radiator shutter |