Faulty Signal. Permanent Fault

Faulty signal. Permanent fault

Checking fuses
Check that carphone fuse #29 in the passenger compartment fusebox is not half burned by trying a new fuse.

Hint: After market carphone installations without VolvoOnCall are supplied with voltage through the radio fuses, #15 and #16 in the passenger compartment fusebox.
After market carphone installations with VolvoOnCall are supplied with voltage through fuse #29.

Other information:
- To access or replace the fuse, see Fusebox, passenger compartment, replacing Fusebox, Passenger Compartment, Replacing.
If the carphone is now OK, the fault was due to a bad fuse.

Is the carphone OK?

Yes - Fault Found

No - Checking the power supply

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Checking the power supply
Measure the power supply to the carphone module between terminal #A6 and the battery positive terminal.
Measure the battery voltage.
If the difference between the carphone supply voltage and battery voltage is less than 2.5 V there is an internal fault in the carphone module. If the difference is greater than 2.5 V the fault is in the supply cable.
Remedy as necessary.

Other information:
- To access or replace the carphone module, see Phone module (PHM), replacing Service and Repair
- To access the passenger compartment fuse box, see Fusebox, passenger compartment, replacing Fusebox, Passenger Compartment, 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 fuses

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