Powertrain Control Module (PCM)
WARNING: This page is about a different car, the 2003 Pontiac Sunfire and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
Current Gear: Displays current gear position of the transmission
TCC Brake Switch: Displays ON or OFF status of the TCC Brake switch.
TR Sw. A/B/C/P: Displays 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 PCM. Hi displayed indicates a high voltage signal (B+) being monitored at the PCM.