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Home >> Volvo >> 2008 >> XC70 >> Repair and Diagnosis (Single Page) >> Electrical >> Gauges >> Phone Module (PHM) And Subwoofer (Sub) Module Diagnostic Trouble Codes >> PHM-U300049: Control Module. System Internal Failures. Internal Electronic Failure (2009-12) >> Fault-Tracing >> Replacing A Component
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Replacing A Component

NOTE: Troubleshooting of this diagnostic trouble code requires that you delete diagnostic trouble codes, that is, why this diagnostic trouble code should be checked last of the diagnostic trouble codes in the Phone module (PHM).

Erase DTCs from the Phone module (PHM) and restart the control module by clicking the symbol for VCT2000. Continue according to the instructions there.

If the diagnostic trouble code is intermittent the problem has been solved during restart.

If the diagnostic trouble code is permanent, replace Phone module (PHM).

Other information 

Fig 1: Identifying VCT2000 Diagnostic Tool Symbol In VIDA
GLL100564Courtesy of VOLVO CARS CORPORATION
Fig 2: Identifying Control Module
GLL163991Courtesy of VOLVO CARS CORPORATION

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