Engine Controls - Theory & Operation

• Introduction
• Air Induction System
  • Intake Air Control Valve System
    • Camry 3.0L & Supra Non-Turbo
  • Variable Induction System
    • Celica Turbo & MR2 Turbo
  • Turbochargers
    • Celica Turbo, MR2 Turbo & Supra Turbo
• Computerized Engine Controls
  • TOYOTA Computer Control System (TCCS)
  • Control Unit
  • Input Devices
    • Notes
    • A/C Switch
    • Airflow Sensor (Except Camry 2.2L, Celica 1.6L 4A-FE & 2.2L 5S-FE, Corolla, MR2 2.2L, Paseo & Tercel)
    • Battery Signal
    • Brakelight Signal
    • Coolant Temperature Sensor (CTS)
    • Coolant Temperature Switch (Land Cruiser & Paseo A/T)
    • Electrical Load Signal (Camry 2.2L, Celica Turbo & 2.2L 5S-FE, Corolla, MR2 & Paseo)
    • Engine Cranking Signal
    • EGR Gas Temperature Sensor
    • Intake Air Temperature Sensor
    • Knock Sensor
    • Neutral/Start Switch (A/T)
    • Oil Pressure Switch Signal (Supra Turbo)
    • Oxygen (O2) Sensor
    • RPM Signal
    • Sub-Oxygen Sensor (California Only)
    • Throttle Position Sensor (TPS)
    • Turbocharging Pressure Sensor (Celica Turbo & MR2 Turbo)
    • Vacuum Sensor (Camry 2.2L, Celica 1.6L 4A-FE & 2.2L 5S-FE, Corolla, MR2 Non-Turbo, Paseo & Tercel)
    • Vehicle Speed Sensor
    • 4WD Switch (Land Cruiser, Pickup & 4Runner)
  • Output Signals
    • Notes
    • A/C Cut Control System
    • A/C Idle-Up System
    • Air Injection System Vacuum Switching Valve (VSV)
    • Air Suction System Vacuum Switching Valve (VSV)
    • Circuit Opening Relay
    • Electronic Spark Advance
    • EGR System Vacuum Switching Valve (VSV)
    • Electronically Controlled Transmission/Transaxle (ECT)
    • Fuel Pressure Control System Vacuum Switching Valve (VSV)
    • Fuel Pump
    • Idle Speed Control System
    • Idle-Up System
    • Intake Air Control Valve System
    • Oxygen Sensor Heater
    • Self-Diagnostic System
    • Turbocharging Vacuum Switching Valve (VSV)
    • Variable Induction System Vacuum Switching Valve (VSV)
• Fuel System
  • Fuel Delivery
    • EFI Main Relay
    • Circuit Opening Relay
    • Fuel Pump Relay & Fuel Pump Resistor (Celica Turbo, Cressida, MR2 Turbo & Supra)
    • Fuel Pump
    • Fuel Pressure Regulator
    • Fuel Pressure Ctrl Sys (Camry 3.0L, Land Cruiser, MR2 Non-Turbo, Paseo, Pickup, Previa, Supra Turbo, Tercel & 4Runner)
    • Fuel Pulsation Damper
  • Fuel Control
    • Cold Start Injector
    • Cold Start Injector Time Switch
    • Fuel-Cut System
    • Fuel Injectors
    • Injector Resistor (Celica Turbo, MR2 Turbo & Supra Turbo)
    • Oxygen Sensor Heater
  • Idle Speed
    • A/C Cut Control System (Camry 2.2L, Celica 1.6L 4A-FE & 2.2L5S-FE, Corolla, MR2 Non-Turbo, Paseo & Previa)
    • A/C Idle-Up System (Camry 2.2L & Celica 2.2L 5S-FE)
    • Auxiliary Air Valve (Celica 1.6L 4A-FE, Paseo, Pickup, Tercel & 4Runner)
    • Idle Speed Control System (Camry, Celica Turbo & 2.2L 5S-FE, Corolla, Cressida, Land Cruiser, MR2, Previa & Supra)
    • Idle-Up System (Celica 1.6L 4A-FE, Corolla & Tercel)
• Ignition System
  • DISTRIBUTORLESS Ignition System
    • Supra Turbo
  • Electronic Ignition System
    • Notes
    • Except Supra Turbo
• Emission Systems
  • Air Injection System
    • Land Cruiser
  • Air Suction System
    • Notes
    • Pickup & 4Runner
  • Crankcase Ventilation
  • Exhaust Gas RECIRCULATION (EGR) System
  • Evaporative Emission (EVAP) System
• Self-Diagnostic System
• Miscellaneous Controls
  • Transmission Controls
    • Notes
    • Electronically Controlled Transmission/Transaxle (ECT)