Replacing the component

Check the battery voltage

Check the generator (GEN) charging voltage

Check the cable between system relay terminal 3 and control module terminal A70 (#B10) for contact resistance and oxidation according to Contact resistance and oxidation .

Other information: 

• To fault-trace the charging system see Fault-tracing and testing the voltage supply system .

Fig 1: Identifying Voltage Display

Courtesy of VOLVO CARS OF NORTH AMERICA.

Was a fault detected? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  FAULT TRACING FAILED:  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.