| Number | X-pin, colour | Description |
|---|---|---|
| X521 | 6-pin, blue | Plug connector ASC/DSC button |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | Not used | ||
| 2 | E | Signal Locator lighting | Connector, instrument and locator lighting |
| 3 | A | Voltage supply Terminal 15 | ABS/ASC unit |
| 4 | M | Ground | Ground connector |
| 5 | A | ASC passive button | ABS/ASC unit |
| 6 | E | Terminal 15 | Fuse F33 |