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.
Problem Symptoms Table
If a normal code is displayed during the DTC check but the trouble still occurs, check the circuits for each symptom in the order given in the tables on the following references and proceed to the page given for troubleshooting.
The Matrix Table is divided into 3 chapters.
- Chapter 1: Electronic circuit matrix table
- Chapter 2: On-vehicle repair matrix table
- Chapter 3: Off-vehicle repair matrix table
If the instruction "Proceed to next circuit inspection shown on matrix table" is given in the flow chart for each circuit, proceed to the circuit with the next highest number in the table to continue the check.
If the trouble still occurs even though there are no abnormalities in any of the other circuits, check and replace the ECM.
Chapter 1: Electronic Circuit Matrix Table
Chapter 2: On-vehicle Repair
(*: See OVERHAUL - U340E & U341E article.)
Chapter 3: Off-vehicle Repair
(*: See OVERHAUL - U340E & U341E article.)
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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.