Engine Controls - Theory & Operation

• Introduction
• Computerized Engine Controls
  • Notes
  • Electronic Control Module (ECM)
  • Input Devices
    • Notes
    • A/C Switch
    • Mass Airflow (MAF) Sensor
    • Ignition Switch
    • Starter Switch
    • Intake Air Temperature (IAT) Sensor
    • Pressure Sensor
    • Camshaft Position (CMP) Sensor
    • Crankshaft Position (CKP) Sensor
    • Engine Coolant Temperature (ECT) Sensor
    • Inhibitor Switch (A/T)
    • Knock Sensor (KS)
    • Neutral Position Switch
    • Front And Rear Oxygen Sensors (O2S)
    • Throttle Position (TP) Sensor
    • Vehicle Speed Sensor (VSS)
    • Fuel Temperature Sensor
    • Fuel Lever Sensor
    • Fuel Tank Pressure Sensor
  • Output Signals
    • Notes
    • Idle Air Control (IAC) Valve
    • Canister Purge Control Valve (CPCV)
    • Malfunction Indicator Light (MIL)
    • EGR Control Valve (A/T)
    • Fuel Injector(s)
    • Fuel Pump Relay
    • Power Transistor
    • Self-Diagnostics
    • Vent Control Solenoid Valve
• Fuel System
  • Fuel Delivery
    • Fuel Pump
    • Fuel Pump Relay
    • Fuel Pressure Regulator
  • Fuel Control (SFI)
    • Fuel Injectors
  • Idle Speed
    • Fast Idle Control Device (FICD) Solenoid
    • Idle Air Control (IAC) Solenoid Valve
    • Idle Speed Control (ISC) Valve
• Ignition Systems
  • DISTRIBUTORLESS Ignition
  • Ignition Timing Control System
    • Knock Sensor (KS)
    • Ignition Timing Advance Control
• Emission Systems
  • Exhaust Gas RECIRCULATION (EGR)
  • Fuel Evaporative System
    • Purge Control Solenoid (PCS) Valve
    • Canister Purge Control Valve (CPCV)
    • Vent Control Solenoid Valve (VCSV)
    • Fuel Cut Valve (FCV)
    • Two-Way Valve (2.2L)
    • Roll Over Valve
  • Positive Crankcase Ventilation (PCV)
• Self-Diagnostic System
  • Malfunction Indicator Light (Mil)