Transmission Control Module (TCM)

WARNING: This page is about a different car, the 2006 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.

TCC Brake Switch: Displays ON or OFF status of the TCC Brake switch.
IMS A/B/C/P: Displays PARK / NEUTRAL / INVALID / REVERSE / DRIVE or LOW or HI for the state of each of the four inputs from the IMS. LOW displayed indicates a low voltage signal (0 volts) being monitored at the TCM. HI displayed indicates a high voltage signal (B+) being monitored at the TCM.