Powertrain Control Module (PCM) Description: Notes

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 on-board diagnostics for the powertrain functions