Engine Controls - Theory & Operation
- Introduction
- Service Precautions
- Air Induction Systems
- Computerized Engine Controls
- Engine Control System
- Engine Immobilizer System
- Engine Control Module
- Hybrid Vehicle Control Electronic Control Unit
- Input Devices
- Notes
- Accelerator Pedal Position Sensor (Land Cruiser, 2001 MR2 With Sequential Manual Transaxle, Sequoia, Tundra 4.7L V8 & 4Runner)
- Accelerator Pedal Position Sensor (Prius)
- A/C Compressor Lock Sensor (Camry 2.2L 4-Cyl. CNG Models, Camry 2.2L 4-Cyl. Gasoline Models With Manual A/C, Camry Solara 2.2L 4-Cyl. With Manual A/C, Celica, Highlander, MR2 & RAV4)
- A/C Evaporator Temperature Sensor (Camry 2.2L 4-Cyl. CNG Models, Camry 2.2L 4-Cyl. Gasoline Models With Manual A/C & Camry Solara 2.2L 4-Cyl. With Manual A/C)
- A/C Switch (Avalon, Camry, Camry Solara, Celica, Corolla, ECHO, MR2, RAV4, Sequoia, Sienna, Tacoma, Tundra & 4Runner)
- Air/Fuel Sensor (Avalon, Camry 2.2L 4-Cyl. CNG & Gasoline Models, Camry 3.0L V6 With A/T, Camry Solara 2.2L 4-Cyl., Camry Solara 3.0L V6 With A/T, Highlander, RAV4, Sienna, Tacoma, Tundra 3.4L V6 & 4Runner)
- Airflow Meter (Avalon, Camry 3.0L V6, Camry Solara 3.0L V6, Celica, Corolla, ECHO, Highlander, Land Cruiser, MR2, Prius, RAV4, Sequoia, Sienna, Tacoma, Tundra & 4Runner)
- Battery Signal (Avalon, Camry, Camry Solara, Celica, ECHO, Highlander, MR2, Prius, RAV4, Sienna, Tacoma, Tundra 3.4L V6 & 4Runner)
- Battery Signal (Corolla)
- Battery Signal (Land Cruiser)
- Battery Signal (Sequoia & Tundra 4.7L V8)
- Brakelight Signal (Avalon, Camry With A/T, Camry Solara With A/T, Celica With A/T, Corolla With 4-Speed A/T, ECHO With A/T, Highlander, Land Cruiser, MR2, RAV4, Sequoia, Sienna, Tacoma With A/T, Tundra With A/T & 4Runner)
- Camshaft & Crankshaft Position Sensors (Avalon, Highlander 3.0L V6 & Sienna)
- Camshaft & Crankshaft Position Sensors (Camry 2.2L 4-Cyl. CNG & Gasoline Models, & Camry Solara 2.2L 4-Cyl.)
- Camshaft & Crankshaft Position Sensors (Camry 3.0L V6 & Camry Solara 3.0L V6)
- Camshaft & Crankshaft Position Sensors (Celica, Corolla, ECHO, Highlander 2.4L 4-Cyl., MR2, Prius & RAV4)
- Camshaft & Crankshaft Position Sensors (Land Cruiser & Sequoia)
- Camshaft & Crankshaft Position Sensors (Tacoma 2.4L 4-Cyl. & 2.7L 4-Cyl.)
- Camshaft & Crankshaft Position Sensors (Tacoma 3.4L V6, Tundra 3.4L V6 & 4Runner)
- Camshaft & Crankshaft Position Sensors (Tundra 4.7L V8)
- Center Air Bag Sensor Assembly (Camry 2.2L CNG Models, Celica, Corolla, Highlander, MR2, RAV4, Sequoia & Sienna)
- Center Air Bag Sensor Assembly (Prius)
- EGR Gas Temperature Sensor (Camry 3.0L V6, Camry Solara 3.0L V6 & Tacoma 2.7L 4-Cyl. 3RZ-FE)
- EGR Position Sensor (Camry 3.0L V6 & Camry Solara 3.0L V6)
- Electrical Load Signal (Avalon, Camry 3.0L V6, Camry Solara 3.0L V6 & Sienna)
- Electrical Load Signal (Camry 2.2L 4-Cyl. CNG & Gasoline Models, Camry Solara 2.2L 4-Cyl., Land Cruiser, RAV4, Sequoia, Tacoma 2.4L 4-Cyl. & 2.7L 4-Cyl., & Tundra 4.7L V8)
- Electrical Load Signal (Corolla)
- Electrical Load Signal (ECHO)
- Engine Coolant Temperature Sensor
- Engine Cranking Signal (Avalon, Camry, Camry Solara, Celica, Corolla, ECHO, Highlander, Land Cruiser, MR2, RAV4, Sequoia, Sienna, Tacoma, Tundra & 4Runner)
- Fuel Pipe Fuel Pressure Sensor (Camry 2.2L 4-Cyl. CNG Models)
- Fuel Rail Fuel Pressure Sensor (Camry 2.2L 4-Cyl. CNG Models)
- Fuel Rail Fuel Temperature Sensor (Camry 2.2L 4-Cyl. CNG Models)
- Fuel Tank Fuel Temperature Sensor (Camry 2.2L 4-Cyl. CNG Models)
- Heated Oxygen Sensor (All Models)
- Intake Air Temperature Sensor (Avalon, Camry 3.0L V6, Camry Solara 3.0L V6, Celica, Corolla, ECHO, Highlander, Land Cruiser, MR2, Prius, RAV4, Sequoia, Sienna, Tacoma, Tundra & 4Runner)
- Intake Air Temperature Sensor (Camry 2.2L 4-Cyl. CNG & Gasoline Models, & Camry Solara 2.2L 4-Cyl.)
- Knock Sensor (Avalon, Camry 3.0L V6, Camry Solara 3.0L V6, Highlander 3.0L V6, Land Cruiser, Sequoia, Sienna & Tundra 4.7L V8)
- Knock Sensor (Camry 2.2L 4-Cyl. Gasoline Models, Camry Solara 2.2L 4-Cyl., Celica, Corolla, ECHO, Highlander 2.4L 4-Cyl., MR2, Prius, RAV4 & Tacoma 2.4L 4-Cyl. & 2.7L 4-Cyl.)
- Knock Sensor (Tacoma 3.4L V6, Tundra 3.4L V6 & 4Runner)
- Manifold Absolute Pressure Sensor (Camry 2.2L 4-Cyl. CNG & Gasoline Models, & Camry Solara 2.2L 4-Cyl.)
- Park/Neutral Position Switch (Avalon, Camry, Camry Solara, Celica, Corolla, ECHO, Highlander, Land Cruiser, RAV4, Sequoia, Sienna, Tacoma, Tundra & 4Runner)
- Park/Neutral Position Switch (Prius)
- Power Steering Pressure Sensor (ECHO)
- Power Steering Pressure Switch (Avalon, Camry, Camry Solara, Celica, Corolla, Highlander, RAV4, Sienna, Tacoma, Tundra 3.4L V6 & 4Runner)
- Temperature Control Switch (ECHO)
- Throttle Position Sensor (Avalon, Camry, Camry Solara, Celica, Corolla, ECHO, Highlander, 2000 MR2, 2001 MR2 With Standard Type Manual Transaxle, RAV4, Sienna, Tacoma & Tundra 3.4L V6)
- Throttle Position Sensor (Land Cruiser, 2001 MR2 With Sequential Manual Transaxle, Prius, Sequoia, Tundra 4.7L V8 & 4Runner)
- Vacuum Sensor For Hydrocarbon Absorber Catalyst System (Prius)
- Vapor Pressure Sensor (Avalon, Camry 2.2L 4-Cyl. Gasoline Models, Camry 3.0L V6, Camry Solara, Celica, Corolla, Highlander, MR2, RAV4, Sequoia, Sienna & 4Runner)
- Vapor Pressure Sensor (ECHO)
- Vapor Pressure Sensor (Land Cruiser, Tacoma & Tundra)
- Vapor Pressure Sensor (Prius)
- Variable Valve Timing Sensor (Avalon, Highlander 3.0L V6 & Sienna)
- Variable Valve Timing Sensor (Celica, Corolla, ECHO, Highlander 2.4L 4-Cyl., MR2, Prius & RAV4)
- Vehicle Speed Sensor (Avalon)
- Vehicle Speed Sensor (Camry, Camry Solara, Celica, Corolla, ECHO, Land Cruiser, RAV4, Sequoia, Tacoma & Tundra)
- Vehicle Speed Sensor (Highlander)
- Vehicle Speed Sensor (MR2)
- Vehicle Speed Sensor (Prius)
- Vehicle Speed Sensor (Sienna)
- Vehicle Speed Sensor (4Runner)
- 4WD Input (Tacoma , Tundra 3.4L V6 & 4Runner)
- Output Signals
- Fuel Systems
- Fuel Delivery
- Notes
- A/F Heater Relay (Avalon, Camry 3.0L V6 With A/T, Camry Solara 3.0L V6 With A/T, Highlander & Sienna)
- A/F Heater Relay (RAV4)
- Circuit Opening Relay (Avalon)
- Circuit Opening Relay (Camry 2.2L 4-Cyl. CNG Models)
- Circuit Opening Relay (Camry 2.2L 4-Cyl. Gasoline Models, Camry 3.0L V6, Camry Solara & Highlander)
- Circuit Opening Relay (Celica, ECHO & Prius)
- Circuit Opening Relay (Corolla)
- Circuit Opening Relay (MR2)
- Circuit Opening Relay (RAV4)
- Circuit Opening Relay (Sequoia)
- Circuit Opening Relay (Sienna)
- Circuit Opening Relay (Tacoma & Tundra 3.4L V6)
- Circuit Opening Relay (Tundra 4.7L V8)
- Circuit Opening Relay (4Runner)
- EFI Main Relay (Avalon)
- EFI Main Relay (Camry 2.2L 4-Cyl. CNG Models)
- EFI Main Relay (Camry 2.2L 4-Cyl. Gasoline Models & Camry Solara 2.2L 4-Cyl.)
- EFI Main Relay (Camry 3.0L V6 & Camry Solara 3.0L V6)
- EFI Main Relay (Celica)
- EFI Main Relay (Corolla)
- EFI Main Relay (ECHO)
- EFI Main Relay (Highlander)
- EFI Main Relay (Land Cruiser)
- EFI Main Relay (MR2)
- EFI Main Relay (Prius)
- EFI Main Relay (RAV4)
- EFI Main Relay (Sequoia)
- EFI Main Relay (Sienna)
- EFI Main Relay (Tacoma 2.4L 4-Cyl. & 2.7L 4-Cyl.)
- EFI Main Relay (Tacoma 3.4L V6)
- EFI Main Relay (Tundra 3.4L V6)
- EFI Main Relay (Tundra 4.7L V8)
- EFI Main Relay (4Runner)
- Fuel Manual Shutoff Valve & Fuel Filter Assembly (Camry 2.2L 4-Cyl. CNG Models)
- Fuel Pump (Avalon, Camry 2.2L 4-Cyl. Gasoline Models, Camry 3.0L V6, Camry Solara, Celica, Corolla, ECHO, Highlander, MR2, Prius, RAV4, Sienna, Tacoma, Tundra 3.4L V6 & 4Runner)
- Fuel Pump (Land Cruiser)
- Fuel Pump (Sequoia & Tundra 4.7L V8)
- Fuel Pump Electronic Control Unit & Fuel Pump Switch (Land Cruiser)
- Fuel Pump Relay & Fuel Pump Resistor (Sequoia & Tundra 4.7L V8)
- Fuel Pressure Regulator (Avalon, Camry 2.2L 4-Cyl. Gasoline Models, Camry 3.0L V6, Camry Solara, Celica, Corolla, ECHO, Highlander, MR2, Prius, RAV4 & Sienna)
- Fuel Pressure Regulator (Camry 2.2L 4-Cyl. CNG Models)
- Fuel Pressure Regulator (Land Cruiser, Sequoia, Tacoma, Tundra & 4Runner)
- Fuel Pressure Regulator Fuel Shutoff Valve (Camry 2.2L 4-Cyl. CNG Models)
- Fuel Rail Fuel Shutoff Valve (Camry 2.2L 4-Cyl. CNG Models)
- Fuel Tank Fuel Shutoff Valve (Camry 2.2L 4-Cyl. CNG Models)
- Fuel Tank Valve Assembly (Camry 2.2L 4-Cyl. CNG Models)
- IG2 Relay (Avalon, Celica, MR2, Prius & RAV4)
- Fuel Control
- Fuel Clearing Control (Camry 2.2L 4-Cyl. CNG Models)
- Fuel Cut System (Avalon, Camry, Camry Solara, Celica, Corolla, ECHO, Land Cruiser, MR2, Prius, RAV4, Sequoia, Sienna, Tacoma, Tundra & 4Runner)
- Fuel Injectors
- Fuel Injector Unsticking Control (Camry 2.2L 4-Cyl. CNG Models)
- Fuel Leak Detection (Camry 2.2L 4-Cyl. CNG Models)
- Idle Speed
- A/C-Cut Control System (Camry 2.2L 4-Cyl. CNG & Gasoline Models, Camry Solara 2.2L 4-Cyl., Corolla, Highlander, MR2, Prius & RAV4)
- Dashpot (Tacoma 3.4L V6 With M/T)
- Idle Speed Control System (Avalon, Camry, Camry Solara, Celica, Corolla, ECHO, Highlander, 2000 MR2, 2001 MR2 With Standard Type Manual Transaxle, RAV4, Sienna, Tacoma & Tundra 3.4L V6)
- Throttle Control Motor (Land Cruiser, Prius, Sequoia, Tundra 4.7L V8 & 4Runner)
- Throttle Control Motor (2001 MR2 With Sequential Manual Transaxle)
- Throttle Opener (Avalon, Camry, Camry Solara, Sienna, Tacoma & Tundra 3.4L V6)
- Ignition Systems
- Emission Systems & Sub-Systems
- Exhaust Gas RECIRCULATION Control
- Hydrocarbon Absorber Catalyst System
- Fuel Evaporative System
- Notes
- Avalon, Camry 2.2L 4-Cyl. Gasoline Models, Camry 3.0L V6, Camry Solara, Celica, Corolla, Highlander, MR2, RAV4, Sequoia, Sienna & 4Runner
- Echo
- Land Cruiser, Tacoma & Tundra
- Prius
- On-Board Refilling Vapor Recovery System
- Avalon, Camry 2.2L 4-Cyl. Gasoline Models, Camry 3.0L V6, Camry Solara, Celica, Corolla, ECHO, Highlander, MR2, Prius, RAV4, Sequoia, Sienna & 4Runner
- Positive Crankcase Ventilation
- Self-Diagnostic Systems
- Variable Valve Lift System
- Variable Valve Timing System
- Miscellaneous Controls