Electronic Ignition (EI) System Description

The PCM is responsible for maintaining proper spark and fuel injection timing for all driving conditions. Ignition Control (IC) spark timing is the method the PCM uses to control spark advance. To provide optimum driveability and emissions, the PCM monitors input signals from the following components in calculating ignition spark timing:
- The Ignition Control Module (ICM)
- The Throttle Position (TP) sensor
- The Engine Coolant Temperature (ECT) sensor
- The Mass Air Flow (MAF) sensor
- The Intake Air Temperature (IAT) sensor
- The Vehicle Speed Sensor (VSS)
- The transmission gear position or range information sensors
- The engine Knock Sensors (KS)