Signal Too High. Permanent Fault

Signal too high. Permanent fault

Checking the wiring and component

Hint: The hands-free loudspeaker is connected to the carphone module via a connector under the driver's seat.




- Ignition off.
Check the cable between carphone module connector A5 (terminal #5) and hands-free loudspeaker connector B9 for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check the cable between carphone module connector A4 (terminal #4) and hands-free loudspeaker connector B10 for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Try replacing the hands-free loudspeaker if no fault is found in the wiring.
Remedy as necessary.

Other information:
- To access or replace the carphone module, see Phone module (PHM), replacing Service and Repair
- To access or replace the hands-free unit, see Handsfree equipment, replacing
- To connect the breakout box, see Connecting the breakout box. Carphone module Connecting the Breakout Box
- For information about signals and connectors, see Signal description. Phone module (PHM) Signal Description, Phone Module (PHM).













Select "Continue" when the fault has been remedied.

Continue - Verification

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Verification




Verification

Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on
- Switch on the carphone.
Make a call so that both the handset and the hands-free system are used. See the instruction manual.
Ignition off.
Ignition on.
Read off the diagnostic trouble codes (DTCs).
Check that the relevant diagnostic trouble code (DTC) has switched status from permanent to intermittent fault.





Has the status of the diagnostic trouble code (DTC) changed?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - Fault Found

VERIFICATION FAILED - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the wiring and component

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