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.
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HOMESERVICE MANUALSTOYOTA2003PRIUSREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM SELF DIAGNOSTICSINSPECTION MODE
2003 Toyota Prius
Inspection Mode
2003 Toyota PriusSECTION Inspection Mode
NOTE:
The engine is shut off when engine is at normal operating temperature and battery is fully charged and A/C is not turned on. It is necessary to put transit in inspection mode so engine will run continuously.
To put transit in inspection mode, perform the following steps within 60 seconds:
- Ensure ignition is off and then turn ignition on.
- Ensure transaxle is in Park and then fully depress accelerator pedal 2 times.
- Place transaxle in Neutral and then fully depress accelerator pedal 2 times.
- Place transaxle back in Park and then fully depress accelerator pedal 2 times.
- Check that master warning light on instrument cluster at center of instrument panel is flashing to indicate inspection mode operation. See Fig 1. Master warning light may also be referred to as hybrid system error warning light. Turn ignition switch to START position to start engine. Engine will now start and run continuously.
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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.