| Number | X-pin, colour | Description |
|---|---|---|
| X6303 | 9 -pin, Black | Plug connector Oxygen sensor relay |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | Not used | ||
| 2 | A | Terminal 87 | Connector, terminal 87 |
| 3 | Not used | ||
| 4 | M | Ground activation, terminal 85 | DME control unit |
| 5 | Not used | ||
| 6 | E | Continuous positive terminal 30 | Connector, terminal 87 |
| 7 | Not used | ||
| 8 | E | Continuous positive terminal 30 | Connector, terminal 87 |
| 9 | Not used | ||