Engine Controls - Theory & Operation

• Introduction
• Air Induction System
  • Acoustic Control Induction System (ACIS)
    • Notes
    • Es300 & RX300
    • GS300, GS400, LS400, SC300 & SC400
  • Electronic Throttle Control System (ETCS)
    • GS300, GS400, LS400, Lx470, SC300 & SC400
• Computerized Engine Controls
  • Engine Control Module (ECM)
  • Engine Immobilizer System
  • Variable Valve Timing (VVT) System
    • Notes
    • Es300 & RX300
    • GS300 & SC300
    • GS400, LS400 & SC400
  • Input Devices
    • Notes
    • Accelerator Pedal Position Sensor (GS300, GS400, LS400, LX470, SC300 & SC400)
    • Air/Fuel (A/F) Ratio Sensor (ES300 & RX300)
    • A/C Switch
    • Battery Signal
    • Brakelight Signal
    • Camshaft Position Sensor
    • Crankshaft Sensor
    • Engine Coolant Temperature (ECT) Sensor
    • Heated Oxygen Sensor (HO2S)
    • Intake Air Temperature (IAT) Sensor
    • Knock Sensor
    • Ignitor (GS300 & SC300)
    • Mass Airflow (MAF) Sensor
    • Park/Neutral Position (PNP) Switch
    • Throttle Position (TP) Sensor
    • Vapor Pressure Sensor (ES300, LS400, RX300, SC300 & SC400)
    • Vapor Pressure Sensor (GS300, GS400 & LX470)
    • Variable Valve Timing Sensor (ES300, GS400, LS400, RX300 & SC400)
    • Vehicle Speed Sensor (GS300, LS400, LX470, SC300 & SC400)
    • Vehicle Speed Sensor (ES300, GS400 & RX300)
  • Output Signals
    • Notes
    • ACIS Vacuum Switching Valve (VSV)
    • A/F Heater Relay
    • Circuit Opening Relay
    • EFI Main Relay
    • Electronically Controlled Transmission/Transaxle
    • Electronic Spark Advance System
    • EVAP Canister Vacuum Switching Valve
    • Fuel Injectors
    • Fuel Pump
    • Fuel Pump Electronic Control Unit
    • Idle Speed Control System
    • Intake Air Control Valve
    • Malfunction Indicator Light
    • Self-Diagnostics
    • Throttle Control Motor
• Fuel System
  • Fuel Delivery
    • Air/Fuel (A/F) Heater Relay (ES300 & RX300)
    • Circuit Opening Relay (ES300 & RX300)
    • Circuit Opening Relay (LS400)
    • EFI Main Relay (ES300 & RX300)
    • EFI Main Relay (GS300, GS400, SC300 & SC400)
    • EFI Main Relay (LS400)
    • EFI Main Relay (LX470)
    • Fuel Pump (ES300 & RX300)
    • Fuel Pump & Fuel Pump Electronic Control Unit (GS300 & GS400)
    • Fuel Pump, Fuel Pump Electronic Control Unit & Fuel Pump Switch (LX470)
    • Fuel Pump & Fuel Pump Electronic Control Unit (SC300 & SC400)
    • Fuel Pump, Fuel Pump Relay & Fuel Pump Resistor (LS400)
    • Fuel Pressure Regulator (Except LX470)
    • Fuel Pressure Regulator (LX470)
    • Fuel Pressure Pulsation Damper
  • Fuel Control
    • Fuel-Cut System
    • Fuel Injectors
  • Idle Speed
    • Idle Speed Control System (ES300 & RX300)
    • Throttle Opener (ES300 & RX300)
    • Throttle Control Motor (GS300, GS400, LS400, LX470, SC300 & SC400)
• Ignition System
  • DISTRIBUTORLESS Ignition System
    • Notes
    • Es300 & RX300
    • GS300 & SC300
    • GS400, LS400, Lx470 & SC400
• Emission Systems
  • Evaporative Emission (EVAP) System
    • Es300, LS400, RX300, SC300 & SC400
    • GS300, GS400 & Lx470
  • On-Board Refilling Vapor Recovery (ORVR) System
    • Es300, GS300, GS400 & RX300
  • Positive Crankcase Ventilation (PCV) System
• Self-Diagnostic System
  • Malfunction Indicator Light (Mil)
• Miscellaneous Controls
  • Notes
  • Transmission/Transaxle
    • Electronically Controlled Transmission/Transaxle