Checking the Transmission Control Module (TCM)

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off.
Try a new transmission control module (TCM) according to Replacing The Transmission Control Module (TCM) .
NOTE:
Mark the old control module so that it cannot be mistaken for the new one.
Ignition on.
Erase any diagnostic trouble codes (DTCs) stored in the new control module.

Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA
Courtesy of VOLVO CARS OF NORTH AMERICA.

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