Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2004 Volvo V70 Base, 2.4 61, StandardFACTORY OEM SERVICE PROCEDURE
Connector A, Carphone Module (PHM)
| Control module terminal | Breakout box terminal | Signal type | Ignition on | Other |
|---|---|---|---|---|
| A1 | #1 | Hands-free microphone, signal | Alternating current when there is sound from the hands-free microphone | - |
| A2 | #2 | Handset signal, ground | Ulow | - |
| A3 | #3 | Handset signal, microphone | Alternating current when there is sound from the handset microphone | Difficult to measure |
| A4 | #4 | Signal hands-free speaker (-) | Alternating current when there is sound in the hands-free loudspeaker | - |
| A5 | #5 | Signal hands-free speaker (+) | Alternating current when there is sound in the hands-free loudspeaker | - |
| A6 | #6 | 30 supply | Ubat | - |
| A7 | #7 | - | - | - |
| A8 | #8 | - | - | - |
| A9 | #9 | - | - | - |
| A10 | #10 | CANL | Digital signal | - |
| A11 | #11 | Hands-free microphone, ground | Ulow | - |
| A12 | #12 | Signal, handset. loudspeaker | Alternating current when there is sound in the handset loudspeaker | - |
| A13 | #13 | Power supply, handset | 12 V | - |
| A14 | #14 | Cradle signal, handset | U=8 V at cradle off, cradle on U=0 V, Disconnected connector U=5 V | - |
| A15 | #15 | - | - | - |
| A16 | #16 | - | - | - |
| A17 | #17 | Collision cable from the SRS | U=12 V when activated SRS, otherwise U=0 V | - |
| A18 | #18 | Ground | Ulow | - |
| A19 | #19 | - | - | - |
| A20 | #20 | - | - | - |
| A21 | #21 | - | - | - |
| A22 | #22 | CANH | Digital signal | - |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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