| Number | X-pin, colour | Description |
|---|---|---|
| X1312 | 18-pin, yellow | Plug connector Navigation control unit |
| X1313 | 18-pin, blue | Plug connector Navigation control unit |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | E | Reversing light signal | Light module |
| 2 | Not used | ||
| 3 | E | Terminal R | Fuse F32 |
| 4 | Not used | ||
| 5 | Not used | ||
| 6 | Not used | ||
| 7 | A | Navigation bus signal line | Radio/Hifi |
| 8 | E/A | Communication link TXD | GPS receiver |
| 9 | E/A | Communication link RXD | GPS receiver |
| 10 | E | Signal, rear left wheel speed | Connector, rear left speed sensor |
| 11 | Not used | ||
| 12 | Not used | ||
| 13 | Not used | ||
| 14 | Not used | ||
| 15 | Not used | ||
| 16 | E | Pulse per second | GPS receiver |
| 17 | E/A | Communication link TXDN | GPS receiver |
| 18 | E/A | Communication link RXDN | GPS receiver |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | E | Voltage supply terminal 30 | Fuse F50 |
| 2 | Not used | ||
| 3 | E/A | K-bus signal line | K-bus connector |
| 4 | Not used | ||
| 5 | Not used | ||
| 6 | Not used | ||
| 7 | Not used | ||
| 8 | Not used | ||
| 9 | A | AF signal + | Radio |
| 10 | M | Ground | Ground connector |
| 11 | Not used | ||
| 12 | Not used | ||
| 13 | Not used | ||
| 14 | Not used | ||
| 15 | Not used | ||
| 16 | Not used | ||
| 17 | Not used | ||
| 18 | A | AF signal - | Radio |