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.
Intermittent Problems Check (Hand-Held Tester Only)
By putting the vehicle's engine control module (ECM) in the check mode, the 1 trip detection logic is possible instead of the 2 trip detection logic and the sensitivity to detect open circuits is increased. This makes it easier to detect intermittent problems.
- Clear the DTC. See CLEARING DIAGNOSTIC TROUBLE CODES .
- Set the check mode. See CHECK MODE CODE RETRIEVAL (TOYOTA HAND-HELD TESTER ONLY) under RETRIEVING DIAGNOSTIC TROUBLE CODES.
- Simulate the conditions of the malfunction described by customer.
- Check the connector and terminal.
- Wiggle the connector.
NO RELATED
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.