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.
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HOMESERVICE MANUALSVOLVO2007XC90 AWD L6-3.2L VIN 98 B6324SREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSPHM CODES (PHONE MODULE)PHM-0022SIGNAL TOO HIGH
2007 Volvo XC90 AWD L6-3.2L VIN 98 B6324S
Signal Too High
2007 Volvo XC90 AWD L6-3.2L VIN 98 B6324SSECTION Signal Too High
Signal too high
Checking the component and wiring
- Ignition off
- Disconnect connector A from the phone module (PHM)
- Disconnect the handset connector
- Ignition on.
Check the power supply cable. Check for a short-circuit to supply voltage.
Take a reading at connector A for the phone module (PHM) between terminals #7 (#7) and #6 (#6).
Try replacing the carphone handset if no fault is found in the wiring.
Remedy as necessary.
Other information:
- For further information about the fuses and relays, see the Wiring Diagram
- Connecting the breakout box Connecting the Breakout Box, Phone Module (PHM)
- Location of components Locations
- Phone module (PHM), replacing Phone Module (PHM), Replacing
- Handset, replacing Handset, Replacing
- Checking wiring and terminals Checking Wiring and Terminals
Select Continue.
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off
- Reinstall the connectors, components etc.
- Ignition on
- Activate the carphone.
Make a call so that both the handset and the hands-free system are used. See 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 - Troubleshooting procedure complete
No - 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 - Exit Fault-tracing
No - Attempt New Test
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Attempt New Test - Checking the component and wiring
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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.