General Information

Description and Operation Powertrain Control Module (PCM) Description

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, it the vehicle has this equipment

- The generator

- The evaporative emission (EVAP) purge

- The A/C clutch control

- The cooling fan control

- The on-board diagnostics for the powertrain functions