Engine Controls - System & Component Testing

• Introduction
• Component Locations
• Computerized Engine Controls (Gems)
  • Engine Control Module (ECM)
    • Ground Circuits (Discovery)
    • Power Circuits (Discovery)
• Computerized Engine Controls (BOSCH)
  • Engine Control Module (ECM)
    • Ground Circuits (Discovery Series II & Range Rover)
    • Power Circuits (Discovery Series II)
    • Power Circuits (Range Rover)
• Sensors & Switches (Gems)
  • Camshaft Position (CMP) Sensor & Crankshaft Position (CKP) Sensor Synchronization
  • Camshaft Position (CMP) Sensor Circuit
  • Crankshaft Position (CKP) Sensor Circuit
  • Engine Coolant Temperature (ECT) Sensor
  • Engine Fuel Temperature (Eft) Sensor
  • Heated Oxygen Sensor (Ho2S) Circuit
  • Intake Air Temperature (IAT) Sensor
  • Knock Sensor (KS)
  • Mass Airflow Sensor (MAF) Circuit
  • Park/Neutral Switch
  • Throttle Position (TP) Sensor
  • Vehicle Speed Sensor
• Sensors & Switches (BOSCH)
  • Camshaft Position (CMP) Sensor Circuit
  • Crankshaft Position (CKP) Sensor Circuit
  • Engine Coolant Temperature (ECT) Sensor
  • Heated Oxygen Sensor (Ho2S)
  • Mass Airflow/Intake Air Temperature (MAF/IAT) Sensor Circuit
  • Knock Sensor (KS)
  • Throttle Position (TP) Sensor
• Motors, Relays & Solenoids
  • Canister Purge Solenoid (Discovery)
  • Fuel Injector Solenoids
    • Discovery
    • Discovery Series II & Range Rover
  • Fuel Pump Relay
    • Discovery
  • Fuel Pump Relay Circuit
    • Discovery
    • Discovery Series II
    • Range Rover
  • Idle Speed Control (ISC) Stepper Motor
  • Main Relay
    • Discovery
  • Main Relay Circuit
    • Discovery
    • Discovery Series II
    • Range Rover
• Fuel System
  • Fuel System Pressure Release
  • Fuel Delivery
    • Fuel Pressure Test (Discovery)
    • Fuel Pressure Test (Discovery Series II & Range Rover)
  • Fuel Control
    • Notes
    • Fuel Pump Current Draw
    • Fuel Injector Balance Test
    • Fuel Injector Electrical Test
• Idle Control System (Gems)
  • Idle Speed Control (ISC) Stepper Motor
    • Idle Speed Control (ISC) Stepper Motor
  • Park/Neutral Switch
    • Park/Neutral Switch
• Idle Control System (BOSCH)
  • Idle Air Control Valve Circuit (IACV)
• Ignition System
  • Notes
  • Timing Control Systems
• Emission Systems & Sub-Systems
  • Advanced EVAP System (Discovery)
    • Notes
    • EVAP System Pressure Test
    • EVAP System Pressure Test Drive Cycle
  • Advanced EVAP System (Discovery Series II & Range Rover)
    • EVAP System Pressure Test
    • EVAP System Pressure Test Drive Cycle
  • Secondary Air Injection (SAI) System (BOSCH)
    • Discovery Series II
    • Range Rover
• Miscellaneous Controls
  • Notes
  • A/C Request/Grant Signals
    • Discovery
    • Discovery Series II & Range Rover
• Wiring Diagrams