Replacing transmission control module (TCM)
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.
CAUTION:
When transferring the transmission control module (TCM) between different cars be sure to make a note of any diagnostic trouble codes (DTCs) before removing the transmission control module (TCM) from the car.
Turn off the ignition before removing the transmission control module (TCM) from the car.
NOTE:
Always check the transmission control module (TCM) and control module box connector have the required pins and sockets and that these have not been pressed out of their locking positions. Damaged or loose pins or sockets can cause a fault.