V70 2.4 L5-2.4L VIN 61 B5244S (2001)
Trouble-shooting information
Condition
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No SWM diagnostic trouble codes are displayed in the CEM
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No diagnostic trouble codes are displayed in the PHM.
Possible source
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Open circuit, short-circuit to earth or short-circuit to voltage supply on the wire
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Defective RTI switch unit
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Defective audio/telephone switch unit
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Defective cruise-control switch unit.
Fault symptom[s]
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Audio/telephone switch unit does not work.
Checking the Audio / Carphone Switch
Checking the audio / carphone switch
Checking components
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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 not in the steering wheel module (SWM).
