| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | A | LH front loudspeaker voltage control | Amplifier |
| | | |
| 2 | A | RH front loudspeaker voltage control | Amplifier |
| | | |
| 3 | | Not used | |
| | | |
| 4 | E | Telephone mute signal | Splice, telephone |
| | | |
| 5 | E | Voltage supply terminal R | Unloader relay, terminal R |
| | | |
| 6 | | Not used | |
| | | |
| 7 | E/A | I/K-bus signal link | Connector, I/K-bus |
| | | |
| 8 | | Not used | |
| | | |
| 9 | E | Terminal 30 | Fuse F64 |
| | | |
| 10 | E | Speed signal | Instrument cluster Integrated instrument cluster control module (IKE) |
| | | |
| 11 | | Not used | |
| | | |
| 12 | | Not used | |
| | | |
| 13 | E | Nighttime illumination signal | Light module |
| | | |
| 14 | | Not used | |
| | | |
| 15 | M | Radio ground | Ground splice |
| | | |
| 16 | A | Radio ON/antenna signal | Diversity II |
| | | |
| 17 | | Not used | |
| | | |