Theory and Operation: Theory/Operation

• Introduction
  • Notes
  • Electronic Control Module (ECM)
  • Input Devices
    • Coolant Temperature Sensor (CTS)
    • Distributor Reference Signal
    • Exhaust Gas Oxygen (O2) Sensor
    • Manifold Absolute Pressure (MAP) Sensor
    • Manifold Air Temperature (MAT) Sensor (2.0L)
    • Park/Neutral (P/N) Switch
    • Throttle Position Sensor (TPS)
    • Vehicle Speed Sensor (VSS)
  • Output Signals
• Fuel System
  • Fuel Delivery
    • Fuel Pressure Regulator
    • Fuel Pump
    • Fuel Pump Relay
  • Fuel Control
    • Fuel Injector Solenoid
  • Idle Control
    • Idle Air Control Valve (IACV)
    • A/C Compressor Clutch (ECM Controlled)
• Ignition System
  • High Energy Ignition (HEI)
  • Electronic Spark Timing (Est) Control
• Emission Systems
  • Exhaust Gas RECIRCULATION (EGR) System
• Self-Diagnostic System
  • "Service Engine Soon" (SES) Light
  • ALDL Connector
• Transmission Controls
  • Transmission Converter Clutch (TCC) Solenoid
  • Transmission Shift Light (Manual Transmission)
• Miscellaneous ECM Controlled Signals
  • Engine Cooling Fan