WARNING: This page is about a different car, the 2002 Volvo C70, 2001 Volvo C70, 2000 Volvo C70, 1999 Volvo C70, and 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Gearbox Control Module
Courtesy of VOLVO CARS OF NORTH AMERICA.
Switch off the ignition
Move the gear shift lever to position P.
Remove the cover over the control module.
NOTE:
The gearbox control module (TCM) is the module closest to the engine.