General Information

The Powertrain Control Module (PCM) is designed to maintain exhaust emission levels while maintaining excellent driveability and fuel efficiency. The PCM controls the following operations:
^ The fuel control
^ The ignition control (IC)
^ The knock sensor (KS) system
^ The automatic transmission shift functions
^ The manual transmission 1-4 Upshift and Reverse Inhibit
^ The cruise control enable, if the vehicle has this equipment
^ The generator
^ The Evaporative Emission (EVAP) purge
^ The A/C clutch control
^ The cooling fan control
^ The secondary Air Injection (AIR)
^ The Exhaust Gas Recirculation (EGR)
^ The on-board diagnostics for the powertrain functions