CARPHONE Box (To Keypad Unit / CARPHONE Module (PHM)
Before measuring, read, see CONNECTING THE BREAKOUT BOX AND CHECKING THE GROUND TERMINAL .
| Stepper unit terminal | Breakout box terminal | Signal type | Ignition on | Other |
|---|---|---|---|---|
| C1 | #25 | Microphone signal | Alternating current when there is sound to the handset microphone | - |
| C2 | #26 | Analog ground reference | Ulow | - |
| C3 | #27 | - | - | - |
| C4 | #28 | - | - | - |
| C5 | #29 | Power supply to GSM unit | Ubat | - |
| C6 | #30 | Ground | Ulow | - |
| C7 | #31 | Mbus | Digital signal | - |
| C8 | #32 | Loudspeaker signal | Alternating current when there is sound in handset loudspeaker | - |
| C9 | #33 | Signal (-), hands-free | Alternating current when there is sound in the hands-free loudspeaker | - |
| C10 | #34 | Signal (+), hands-free | Alternating current when there is sound in the hands-free loudspeaker | - |
| C11 | #35 | - | - | - |
| C12 | #36 | - | - | - |
| C13 | #37 | - | - | - |
| C14 | #38 | Power supply to GSM unit | Ubat | - |
| C15 | #39 | Ground | Ulow | - |
| C16 | #40 | Signal ground (Mbus) | Ulow | - |