Engine Controls - Theory & Operation

• Introduction
• Computerized Engine Controls
  • Notes
  • Electronic Control Module (ECM)
    • Discovery Series II
    • Range Rover
  • ECM Power Source
    • Main Relay
  • Input Devices
    • Notes
    • Camshaft Position (CMP) Sensor
    • Crankshaft Position (CKP) Sensor
    • Engine Coolant Temperature (ECT) Sensor
    • Heated Oxygen Sensor (HO2S)
    • Knock Sensor (KS)
    • Mass Airflow (MAF)/Intake Air Temperature (IAT) Sensors (Discovery Series II & Range Rover)
    • Throttle Position (TP) Sensor
  • Output Signals
    • Notes
    • Malfunction Indicator Light
    • Fuel Injector
    • Fuel Pump
    • Fuel Pump Relay
    • Fuel Pressure Regulator
    • Inertia Fuel Shutoff Switch
    • Idle Air Control Valve
    • Ignition Relay
    • Secondary Air Injection
• Air Injection System
  • Secondary Air Injection
    • Discovery Series II & Range Rover
• Fuel System
  • Fuel Delivery
    • Fuel Pump
    • Fuel Pump Relay
    • Fuel Pressure Regulator (Discovery Series II & Range Rover)
    • Inertia Fuel Shutoff Switch (IFSS)
  • Fuel Control
    • Fuel Injector
  • Idle Speed
    • Idle Air Control (IAC) Valve
• Ignition System
  • Direct Ignition System (Dis)
    • Notes
    • Ignition Relay
• Evaporative Emission System (EVAP)
  • EVAP Control System (Discovery Series II)
    • EVAP System Operation
    • Purge Valve
    • Leak Detection Pump (LDP)
    • Anti-Trickle Fill Valve
    • EVAP Canister
    • EVAP Canister Purge Solenoid Valve
  • EVAP Control System (Range Rover)
    • EVAP Control System
    • Anti-Trickle Fill Valve
    • EVAP Control Canister
    • EVAP Canister Vent Solenoid Valve
    • Fuel Leak Detection System (Vacuum Type)
• Self-Diagnostic System
  • Notes
  • Malfunction Indicator Light (Mil)