Keypad unit / Carphone module (PHM) (to carphone box)
Before measuring, read Connecting the breakout box and checking the ground terminal .
| Control module terminal | Breakout box terminal | Signal type | Ignition on / carphone on | Other |
|---|---|---|---|---|
| B1 | #25 | Microphone signal | Alternating current when there is sound to the handset microphone | - |
| B2 | #26 | Analog ground reference | Ulow | - |
| B3 | #27 | - | - | - |
| B4 | #28 | - | - | - |
| B5 | #29 | Power supply to GSM unit | Ubat | - |
| B6 | #30 | Ground | Ulow | - |
| B7 | #31 | Mbus | Digital signal | - |
| B8 | #32 | Loudspeaker signal | Alternating current when there is sound in handset loudspeaker | - |
| B9 | #33 | Signal (-), handsfree | Alternating current when there is sound in the handsfree loudspeaker | - |
| B10 | #34 | Signal (+), handsfree | Alternating current when there is sound in the handsfree loudspeaker | - |
| B11 | #35 | - | - | - |
| B12 | #36 | - | - | - |
| B13 | #37 | - | - | - |
| B14 | #38 | Power supply to GSM unit | Ubat | - |
| B15 | #39 | Ground | Ulow | - |
| B16 | #40 | Signal ground (Mbus) | Ulow | - |