Checking the control module

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition on
• Read off the check sum and calculated check sum.

  Check that the check sums correspond.

  If they do not correspond this indicates an internal fault in the control module.

  Fig 2: Identifying VCT2000 Diagnostic Tool

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 3: Identifying Transmission Control Module

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Are the values correct? 

• YES 

  FAULT NOT FOUND:  Troubleshooting has been completed.

• NO 

  Refer to Replacing the control module and programming