Transmission Control Module (TCM)

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.