Replacing the transmission control module (TCM): Information
WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. 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, make a note of any diagnostic trouble codes (DTCs) and the status of counters and frozen values
before removing the control module from the car. Turn off the ignition before removing the control module from the car.
NOTE:
Always check that the control module and cable harness connector pins and sockets are undamaged and that these have not been pressed out of their locking positions. Damaged or loose pins or sockets may cause a fault.