Engine Controls - Theory & Operation
- Introduction
- Air Induction System
- Computerized Engine Controls
- Engine Control System
- Engine Immobilizer System
- Engine Control Module (ECM)
- Variable Valve Timing (VVT) System
- Input Devices
- Notes
- Accelerator Pedal Position Sensor (Land Cruiser, LX470 & Supra Non - Turbo)
- Air/Fuel (A/F) Sensor (Avalon Calif. Emission Vehicles, Camry 2.2L 4-Cyl. Calif. Emission Vehicles, Camry 3.0L V6 Calif. Emission Vehicles With A/T & RAV4 Calif. Emission Vehicles)
- A/C Switch (All Models)
- Airflow Meter (Avalon, Camry 3.0L V6, Land Cruiser, LX470, Sienna, Supra, Tacoma, T100 & 4Runner)
- Battery Signal (Avalon, Camry, Celica, RAV4, Sienna, Tacoma, Tercel, T100 & 4Runner
- Battery Signal (Corolla)
- Battery Signal (Land Cruiser & LX470)
- Battery Signal (Supra Non-Turbo)
- Battery Signal (Supra Turbo)
- Brakelight Signal (Avalon, Camry, Corolla With A/T, Land Cruiser, Sienna & Supra)
- Brakelight Signal (Celica, RAV4 With A/T, Tacoma, T100 & 4Runner)
- Camshaft & Crankshaft Position Sensors (Avalon & Camry 3.0L V6)
- Camshaft & Crankshaft Position Sensors (Camry 2.2L 4-Cyl.)
- Camshaft & Crankshaft Position Sensors (Celica)
- Camshaft & Crankshaft Position Sensors (Corolla)
- Camshaft & Crankshaft Position Sensors (Land Cruiser & LX470)
- Camshaft & Crankshaft Position Sensors (RAV4)
- Camshaft & Crankshaft Position Sensors (Sienna)
- Camshaft & Crankshaft Position Sensors (Supra Non-Turbo)
- Camshaft & Crankshaft Position Sensors (Supra Turbo)
- Camshaft & Crankshaft Position Sensors (Tacoma 2.4L 4-Cyl. & 2.7L 4-Cyl., T100 2.7L 4-Cyl. & 4Runner 2.7L 4-Cyl.)
- Camshaft & Crankshaft Position Sensors (Tacoma 3.4L V6, T100 3.4L V6 & 4Runner 3.4L V6)
- Camshaft & Crankshaft Position Sensors (Tercel)
- EGR Gas Temperature Sensor (Avalon, Camry 3.0L V6, Supra Turbo, Tacoma 2.4L 4-Cyl & 2.7L 4-Cyl., Tacoma 3.4L V6 2WD All Models & 4WD Regular Cab, T100 2.7L 4-Cyl., T100 3.4L V6 2WD 1/2 Ton & 4Runner 2.7L 4-Cyl.)
- EGR Position Sensor (Avalon & Camry 3.0L V6)
- Electrical Load Signal (Avalon, Camry 3.0L V6, Sienna & Supra Non-Turbo)
- Electrical Load Signal (Camry 2.2L 4-Cyl., Celica, RAV4 & Supra Turbo)
- Electrical Load Signal (Corolla)
- Electrical Load Signal (Land Cruiser & LX470)
- Engine Coolant Temperature (ECT) Sensor (All Models)
- Engine Cranking Signal (All Models)
- Intake Air Temperature Sensor (Avalon, Camry 3.0L V6, Land Cruiser, Sienna, Supra, Tacoma, T100 & 4Runner)
- Intake Air Temperature Sensor (Camry 2.2L 4-Cyl., Celica, Corolla, RAV4 & Tercel)
- Knock Sensor (Avalon & Camry 3.0L V6, Land Cruiser, LX470 & Sienna)
- Knock Sensor (Camry 2.2L 4-Cyl., Celica, Corolla, Tacoma 2.4L 4-Cyl. & 2.7L 4-Cyl., T100 2.7L 4-Cyl. & 4Runner 2.7L 4-Cyl.)
- Knock Sensor (RAV4 & Tercel)
- Knock Sensor (Supra, Tacoma 3.4L V6, T100 3.4L V6 & 4Runner 3.4L V6)
- Manifold Absolute Pressure (MAP) Sensor (Camry 2.2L 4-Cyl., Celica, Corolla, RAV4 & Tercel)
- Oxygen Sensor (All Models)
- Park/Neutral Position Switch (A/T Models)
- Power Steering Pressure Switch (Avalon, Camry, Corolla, Sienna, Tacoma 3.4L V6, T100 3.4L V6 & 4Runner 3.4L V6)
- Power Steering Pressure Switch (Supra Non-Turbo)
- Sub-Throttle Position Sensor (Supra Turbo)
- Throttle Position (TP) Sensor (Avalon, Camry, Celica, Corolla, RAV4, Sienna, Supra Turbo, Tacoma, Tercel, T100 & 4Runner)
- Throttle Position (TP) Sensor (Land Cruiser, LX470 & Supra Non - Turbo)
- Turbo Pressure Sensor (Supra Turbo)
- Vapor Pressure Sensor (Avalon, Camry, Celica Calif. Emission Vehicles, Corolla, Land Cruiser, LX470, RAV4, Sienna, Supra Non - Turbo, Tacoma, Tercel, T100 & 4Runner)
- Vehicle Speed Sensor (Avalon, Camry, Celica, Corolla, Land Cruiser, RAV4, Supra Turbo, Tacoma 2.7L 4-Cyl. 3RZ-FE & 4Runner 2.7L 4-Cyl.)
- Vehicle Speed Sensor (Sienna, Tacoma 3.4L V6 & 4Runner 3.4L V6)
- Vehicle Speed Sensor (Supra Non-Turbo)
- Vehicle Speed Sensor (Tacoma 2.4L 2RZ-FE 4-Cyl., Tercel & T100)
- 4WD Switch (Tacoma, T100 & 4Runner)
- Output Signals
- Fuel System
- Fuel Delivery
- Notes
- Circuit Opening Relay (Avalon, Camry & Corolla)
- Circuit Opening Relay (Celica)
- Circuit Opening Relay (RAV4)
- Circuit Opening Relay (Sienna)
- Circuit Opening Relay (Tacoma & T100)
- Circuit Opening Relay (Tercel)
- Circuit Opening Relay (4Runner)
- EFI Main Relay (Avalon & Camry)
- EFI Main Relay (Celica)
- EFI Main Relay (Corolla)
- EFI Main Relay (Land Cruiser & LX470)
- EFI Main Relay (RAV4)
- EFI Main Relay (Sienna, Tacoma, Tercel, T100 & 4Runner)
- EFI Main Relay (Supra Non-Turbo)
- EFI Main Relay & EFI No. 2 Relay (Supra Turbo)
- Fuel Pump (Avalon, Camry, Celica, Corolla, RAV4, Sienna, Tacoma, Tercel, T100 & 4Runner
- Fuel Pump (Land Cruiser & LX470)
- Fuel Pump (Supra)
- Fuel Pump Electronic Control Unit (ECU) & Fuel Pump Switch (Land Cruiser & LX470)
- Fuel Pump Electronic Control Unit (ECU) (Supra)
- Fuel Pressure Regulator (Avalon, Camry, Corolla, RAV4, Sienna, Supra Non-Turbo & Tercel)
- Fuel Pressure Regulator (Celica, Land Cruiser, LX470, Supra Turbo, Tacoma, T100 & 4Runner)
- Fuel Pressure Control System & Vacuum Switching Valve (VSV) (Supra Turbo)
- Fuel Control
- Idle Speed
- A/C-Cut Control System (Camry, Celica, Corolla, Land Cruiser, LX470, RAV4, Supra & Tercel)
- Dashpot (Supra Turbo, Tacoma 3.4L V6 With M/T, T100 3.4L V6 With M/T & 4Runner 3.4L V6 With M/T)
- Idle Speed Control System (Avalon, Camry, Celica, Corolla, RAV4, Sienna, Supra Turbo, Tacoma, Tercel, T100 & 4Runner)
- Throttle Control Motor (Land Cruiser, LX470 & Supra Non-Turbo)
- Throttle Opener (Avalon, Camry, Celica, RAV4, Sienna, Supra Turbo, Tacoma, T100 & 4Runner)
- Ignition System
- Emission Systems
- Exhaust Gas RECIRCULATION (EGR) System
- Evaporative Emission (EVAP) System
- Notes
- Avalon, Camry, Celica Calif. Emission Vehicles, Corolla, Land Cruiser, RAV4, Sienna, Supra Non-Turbo, Tacoma, Tercel, T100 & 4Runner
- Celica Except Calif. Emission Vehicles
- Supra Turbo
- On-Board Refilling Vapor Recovery (ORVR) System
- Positive Crankcase Ventilation
- Self-Diagnostic System
- Miscellaneous Controls