XC90 L5-2.5L Turbo VIN 59 B5254T2 (2004)
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Ignition off
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Disconnect the RTI switch
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Ignition on.
Activate and read off the status of the buttons in the audio/carphone switch.
If the readings give a correct result, the fault is in the RTI switch.
Other information:
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To access the RTI switch, see Keypad steering wheel, replacing, TF-80SC AWD, AW50/51 AWD, M66 AWD See: Steering Mounted Controls
Assembly/Service and Repair/Keypad Steering Wheel, Replacing.
Was the audio/carphone switch status OK?
Yes - Troubleshooting procedure complete
No - Checking components and wiring
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