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Volvo
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2002
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S60 Base, 2.4 61, Standard
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Repair and Diagnosis
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Accessories & Equipment
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Infotainment
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Audio Module (AUM), Phone Module (PHM), Road Traffic Information (RTI) - Diagnostic Trouble Codes
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Diagnostic Testing Procedures
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Checking wiring and terminals, permanent faults
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Intermittent fault-tracing
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Intermittent communication problems
Intermittent communication problems
Intermittent communication problems could be due to:
Electromechanical interference
Oxidation / loose connections in the connectors
Defective signal cables.