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.
Inspection Procedure
- CHECK FOR WATER DAMAGE
- Check the main body ECU, peripheral components, and wire harnesses for traces of water.
OK:
There are no traces of water.
NG: TAKE APPROPRIATE MEASURES AGAINST CAUSE OF WATER DAMAGE AND REPLACE MAIN BODY ECU
OK: Go to Next Step
- CHECK DTC OUTPUT
- Delete the DTCs (See
DTC CHECK / CLEAR ).
HINT:
After all DTCs are cleared, check if the trouble occurs again 30 seconds after the power switch is turned on (IG).
- Check for DTCs again.
OK:
No DTC is output.
NG: REPLACE MAIN BODY ECU
OK: END
- Delete the DTCs (See
DTC CHECK / CLEAR ).
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.