| Number | X-pin, colour | Description |
|---|---|---|
| X638 | 6-pin, black | Plug connector Electrical fuel pump (EKP I) |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | M | Ground | Ground point |
| 2 | E | Voltage supply, terminal 15 | Fuel pump relay 1 |
| 3 | Not used | ||
| 4 | E | Sensor ground I | Integrated electronic control unit (IKE) |
| 5 | Not used | ||
| 6 | A | Tank content I | Integrated electronic control unit (IKE) |