| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | A | Signal Transceiver/charging electronics | Connector X4547 |
| | | |
| 2 | | Not used | |
| | | |
| 3 | M | Ground | Ground connector |
| | | |
| 4 | E | Terminal 30 | Fuse F39 |
| | | |
| 5 | E | Terminal R | Fuse F7 |
| | | |
| 6 | A | Signal Transceiver/charging electronics | Connector X4556 |
| | | |
| 7 | E | Signal Interface | Interface |
| | | |
| 8 | E | Signal Transceiver/charging electronics | Connector X4554 |
| | | |
| 9 | | Not used | |
| | | |
| 10 | A | Signal Mute | Connector X4553 MUTE |
| | | |
| 11 | E | Signal Transceiver/charging electronics | Connector X4551 |
| | | |
| 12 | A | Signal DSC | Connector X4550 |
| | | |
| 13 | | Not used | |
| | | |
| 14 | A | Negative activation Microphone | Connector X1745 |
| | | |
| 15 | E | Positive activation Microphone | Connector X1744 |
| | | |
| 16 | E | Terminal 30 | Fuse F39 |
| | | |
| 17 | M | Ground | Ground connector |
| | | |
| 18 | A | Signal DSC | Connector X4549 |
| | | |
| 19 | E | AF signal Cellular telephone | Connector X18764 |
| | | |
| 20 | M | Ground | Shield |
| | | |
| 21 | E | Signal Interface | Interface |
| | | |
| 22 | E | K-bus signal | K-bus connector |
| | | |
| 23 | A | Signal Transceiver/charging electronics | Connector X4552 |
| | | |
| 24 | A | Electronic ground | Connector X4548 |
| | | |
| 25 | A | AF signal Cellular telephone | Connector X18765 |
| | | |