Carphone (for handsfree microphone)
Before measuring, read Connecting the breakout box and checking the ground terminal .
| Pin no. | Signal type | Ignition on | Other |
| D1 | Power supply and microphone signal | Analog signal | The microphone signal is retained over DC |
| D2 | - | - | - |
| D3 | Signal ground, handsfree microphone | Ulow | - |
| D4 | - | - | - |
| D5 | - | - | - |