Engine Controls - System & Component Testing

• Introduction
• Computerized Engine Controls
  • Engine Control Module (ECM)
    • Power & Ground Circuits (G20)
    • Power & Ground Circuits (Q45)
• Engine Sensors & Switches
  • Notes
  • Absolute Pressure (AP) Sensor
  • Crankshaft Position (CKP) Sensor
  • Camshaft Position (CMP) Sensor
  • Engine Coolant Temperature (ECT) Sensor
  • EGR Temperature Sensor
  • Fuel Level Sensor (G20)
  • Fuel Tank Temperature Sensor
  • Ignition Switch (Start Signal)
  • Intake Air Temperature (IAT) Sensor
  • Front Heated Oxygen Sensor (Ho2S)
  • Rear Heated Oxygen Sensor (Ho2S)
  • Knock Sensor (KS)
  • Mass Airflow (MAF) Sensor
  • Power Steering Pressure Switch
  • Power Steering Pressure Switch System Test
    • G20
    • Q45
  • Throttle Position (TP) Sensor
  • Vehicle Speed Sensor (VSS)
• Relays & Solenoids
  • Relays
    • A/C Clutch Relay
    • ECCS, ECM & Fuel Pump Relays
  • Solenoids
• Fuel System
  • Fuel Pressure Release
  • Fuel Delivery
    • Notes
    • Fuel Pump Control System (G20)
    • Fuel Pump Control System (Q45)
    • Fuel Pump Control Module (FPCM) - Q45
    • Fuel Pump Relay
  • Fuel Control
    • Fuel Injector
    • Fuel Injector Circuits (G20)
    • Fuel Injector Circuits (Q45)
• Idle Control System
  • Idle Air Control Valve-Auxiliary Air Control (IACV-AAC) Valve
  • Idle Air Control Valve-Fast Idle Control Device (IACV-FICD)
    • Q45
• Ignition System
  • Notes
  • DISTRIBUTORLESS Ignition System
    • Ignition Coil
    • Power Transistor
    • Camshaft Position (CMP) Sensor
  • Ignition Timing Control System
    • Timing Advance System
• Emission Systems & Sub-Systems
  • PCV Valve
  • Exhaust Gas RECIRCULATION (EGR)
    • EGR System Check
    • EGR Backpressure Transducer (Q45)
    • EGRC Solenoid (Q45)
    • EGR Temperature Sensor
    • EGR Valve (G20 & Q45)
    • EGR Volume Control Valve (EGR-VCV) - G20
  • Fuel Evaporation (EVAP) Control System
    • EVAP System Leak Test
    • EVAP Canister Test
  • On Board Refueling Vapor Recovery (ORVR) System
    • Notes
    • Refueling Control Valve Test
    • Refueling EVAP Vapor Cut Valve Test
    • Strong Fuel Odor From EVAP Canister (G20)
    • Strong Fuel Odor From EVAP Canister (Q45)
    • Cannot Refuel/Fuel Odor From Fuel Filler While Refueling (G20)
    • Cannot Refuel/Fuel Odor From Fuel Filler While Refueling (Q45)
  • Positive Crankcase Ventilation (PCV)
• Miscellaneous Controls
  • Notes
  • A/C Clutch Relay
  • Electrical Load Signal
    • G20
    • Q45
• Component Locations