Checking diagnostic trouble codes (DTCs)

Fig 1: Identifying Ignition On Position

Courtesy of VOLVO CARS OF NORTH AMERICA.

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

  Check whether any of diagnostic trouble codes (DTCs) ECM-903C, ECM-9150, ECM-9160 or ECM-9170 are stored in the engine control module (ECM).

  If any of these diagnostic trouble codes (DTCs) are stored, these must be remedied first.

  Fig 2: Identifying VCT2000

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Are any of the above diagnostic trouble codes (DTCs) stored? 

• YES 

  Refer to Fault-tracing information 

• NO 

  Refer to Checking components and wiring