Transmission Control Module (TCM) Diagnostic Functions: Notes

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2014 Volvo XC90, 2013 Volvo XC90, 2012 Volvo XC90, 2011 Volvo XC90, and 2010 Volvo XC90. However, it is still accessible from the selected car via links, so may be relevant.

GENERAL

Fig 1: Identifying Transmission Control Module

Courtesy of VOLVO CARS CORPORATION

The control module has a built-in diagnostic system, the Volvo on-board diagnostic (OBD) system. This system continuously monitors its own system and the input and output signals.