Checking components and wiring
HINT: The hands-free microphone is connected to the phone module (PHM) via a connector in the right-hand A-post.
HINT: The hands-free loudspeaker is connected to the phone module (PHM) via a connector under the driver's seat.
- Ignition off.
Check the hands-free speaker and phone module (PHM) connectors. Check for loose connections. See Contact resistance and oxidation .
Check the cable between the phone module (PHM) connector A4 (terminal #4) and hands-free loudspeaker connector B10. Check the cable between phone module (PHM) connector A5 (terminal #5) and hands-free loudspeaker connector B9. Check for an open-circuit. See Open-circuit, permanent faults .
Check the cable between phone module (PHM) connector terminal A11 (terminal #11) and hands-free microphone connector C terminal B. Check for a short-circuit to supply voltage. See Short-circuit to supply voltage. Permanent faults .
Try a new hands-free loudspeaker.
Try a new hands-free microphone.
Remedy as necessary.
Other information:
- To access or replace the hands-free unit, see Handsfree equipment, replacing
- To access and replace the phone module (PHM), see Telephone module/-control module (PHM), changing
- For information about signals and connectors, see Signal description. Phone module (PHM)
- To connect the breakout box, see Connecting the breakout box. Carphone module .