| Number | X-pin, colour | Description |
|---|---|---|
| X6220 | 4 -pin, Black | Plug connector Heated oxygen sensor |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | E | Signal, oxygen sensor heater | DME control unit |
| 2 | M | Oxygen sensor signal | DME control unit |
| 3 | M | Terminal 31 | Ground connector |
| 4 | E | Terminal 87 | Connector, terminal 87 |