Powertrain Control Module (PCM)

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WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. 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.