Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2002 Toyota PriusFACTORY OEM SERVICE PROCEDURE
Engine Control System & Component Testing - 4-Cylinder
- Introduction
- Service Precautions
- Programming
- Air Induction Systems
- Computerized Engine Controls
- Engine Sensors & Switches
- Accelerator Pedal Position Sensor
- A/C Compressor Lock Sensor
- A/C Evaporator Temperature Sensor
- Air/Fuel Sensor
- Airflow Meter
- BRAKELIGHT Switch
- Camshaft Position Sensor
- Crankshaft Position Sensor
- EGR Gas Temperature Sensor
- Engine Coolant Temperature Sensor
- Heated Oxygen Sensor
- Ignition Switch
- Intake Air Temperature Sensor
- Knock Sensor
- Park/Neutral Position Switch
- Positive Temperature Coefficient Heater
- Power Steering Pressure Sensor
- Power Steering Pressure Switch
- Throttle Position Sensor
- Vacuum Sensor For Hydrocarbon ADSORBER Catalyst System
- Vapor Pressure Sensor
- Variable Valve Timing Sensor
- Vehicle Speed Sensor
- Modules, Motors, Relays & Solenoids
- Fuel Systems
- Idle Control Systems
- Ignition Systems
- Emission Systems & Sub-Systems
- Notes
- Exhaust Gas RECIRCULATION System
- Hydrocarbon ADSORBER Catalyst System (PRIUS)
- Fuel Evaporative System
- Notes
- Fuel EVAP System Test (Camry & Highlander)
- Fuel EVAP System Test (Camry Solara, Celica, Corolla, MR2, RAV4 & Tacoma)
- Fuel EVAP System Test (ECHO)
- Fuel EVAP System Test (Prius)
- Canister Closed Valve Vacuum Switching Valve (Camry, Camry Solara, Celica, Corolla, ECHO, Highlander, MR2, RAV4 & Tacoma)
- Canister Closed Valve Vacuum Switching Valve (Prius)
- Charcoal Canister
- Cut-Off Valve
- EVAP Vacuum Switching Valve (All Models)
- Overfill Check Valve
- Pressure Switching Valve Vacuum Switching Valve (Camry, Camry Solara, Celica, Corolla, Highlander, MR2, RAV4 & Tacoma)
- Purge Flow Switching Valve Vacuum Switching Valve (Prius)
- Vapor Pressure Sensor (Camry)
- Vapor Pressure Sensor (Camry Solara, Corolla, MR2 & RAV4)
- Vapor Pressure Sensor (Celica & ECHO)
- Vapor Pressure Sensor (Highlander)
- Vapor Pressure Sensor (Prius)
- Vapor Pressure Sensor (Tacoma)
- Positive Crankcase Ventilation
- Throttle Controls
- Variable Valve Lift System
- Variable Valve Timing System
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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