| Number | X-pin, colour | Description |
|---|---|---|
| X521 | 6-pin, Blue | Plug connector ASC/DSC switch |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | Not used | ||
| 2 | E | Night light signal | Light module |
| 3 | A | ASC passive signal | Not used |
| 4 | M | Ground | Ground connector |
| 5 | E | Terminal 15 | Fuse F17 |
| 6 | A | ASC passive signal | ABS/ASC control unit |