Checking diagnostic trouble codes (DTCs)

Fig 1: Identifying Ignition Switch ON Position

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition on
• Read off diagnostic trouble codes (DTCs).

  Check to see if any other diagnostic trouble codes (DTCs) are stored.

  Any other diagnostic trouble codes (DTCs) that are stored must be remedied first.

  Fig 2: Identifying VCT2000 Diagnostic Tool

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Are any other diagnostic trouble codes (DTCs) stored? 

• YES 

  Refer to Fault-tracing information 

• NO 

  Refer to Programming or replacing the engine control module (ECM)