Checking other diagnostic trouble codes (DTCs)

HINT: In the event of communication problems, the fault may exist in other parts of the communications network. The role of the central electronic module is to generally control the communications network and to store diagnostic trouble codes (DTCs) in the event of communication problems between control modules. 

HINT: If there are diagnostic trouble codes (DTC) stored in the central electronic module these must be fault traced accordingly. 

Fig 1: Identifying Ignition Switch ON Position

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition on
• Wait approximately 60 seconds
• Read off diagnostic trouble codes (DTCs).

  If there are diagnostic trouble codes (DTCs) for communication problems stored for the brake control module in the central electronic module, these must be fault traced first.

  Fig 2: Identifying VCT2000 Diagnostic Tool

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Were diagnostic trouble codes (DTCs) stored in the central electronic module? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  Refer to Checking diagnostic trouble codes (DTCs)