Self Diagnosis Function: Notes
WARNING: This page is about a different car, the 2011 Lincoln MKZ and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
The Transmission Control Module (TCM) monitors the communication status of each sensor, electronic component and the PCM. If any malfunctions occur, the TCM function warns the driver and stores the malfunction as a diagnosis code.