Engine Controls - Theory & Operation

• Introduction
• Air Induction System
  • Turbochargers
• Computerized Engine Controls
  • Notes
  • Engine Control Module (ECM)
  • Input Devices
    • Notes
    • A/C Switch
    • Coolant Temperature Sensor (CTS)
    • Knock Sensor (Motronic System)
    • Gear Selector Switch
    • Heated Oxygen Sensor (HO2S)
    • Intake Air Temperature (IAT) Sensor
    • Manifold Absolute Pressure (MAP) Sensor
    • Mass Airflow (MAF) Sensor
    • Throttle Position (TP) Sensor
    • Vehicle Speed Sensor (VSS)
  • Output Signals
    • Notes
    • Idle Air Control (IAC) Valve
    • Canister Purge Solenoid
    • CHECK ENGINE Light
    • Fuel Pump Relay
    • Fuel Injectors
    • Idle-Up Solenoid
    • Ignition Coil(s)
    • Heated Oxygen Sensor
    • Secondary Air Injection Pump
    • Self-Diagnostics
    • Wastegate Solenoid
• Fuel System
  • Fuel Delivery
    • Notes
    • Fuel Pressure Regulator
    • Fuel Pump
    • Fuel Pump Relay
  • Fuel Control
    • ECM
    • Fuel Injectors
    • Heated Oxygen Sensor
  • Idle Speed
    • Idle Air Control (IAC) Valve
• Ignition System
  • MOTRONIC Ignition System
  • TRIONIC Ignition System
• Emission Systems
  • Engine Controls - Theory & Operation
    • Pulsed Secondary Air Injection
    • Three-Way Catalytic Converter
    • Fuel Evaporative System
    • Positive Crankcase Ventilation
    • Secondary Air Injection System
• Self-Diagnostic System
  • Notes
  • Malfunction Indicator Light (Mil)
• Miscellaneous Controls
  • Notes
  • A/C Clutch
  • Cooling Fan
    • Cooling Fan Motor
    • Cooling Fan Control Relay