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.
How To Proceed With Troubleshooting
HINT:
*: Use the intelligent tester.
- VEHICLE BROUGHT TO WORKSHOP
- CUSTOMER PROBLEM ANALYSIS
- Interview the customer and confirm the trouble (See HOW TO PROCEED WITH TROUBLESHOOTING ).
- CHECK DTC AND FREEZE FRAME DATA*
- Check and record a DTC and Freeze Frame Data.
- Clear the DTC and Freeze Frame Data (See DTC CHECK / CLEAR , or FREEZE FRAME DATA ).
- Reconfirm the DTC.
- Reconfirm the DTC based on the recorded DTC and Freeze Frame Data (See
DTC CHECK/CLEAR , or
FREEZE FRAME DATA ).
HINT:
If any of the DTCs U0100/65, U0123/62, U0124/95, and U0126/63 is output together with a CAN communication DTC, first check the appropriate sensor for a momentary open circuit (See CHECK FOR INTERMITTENT PROBLEMS ).
Result
RESULT CHARTCondition Proceed to DTC is output A DTC is not output (Problem symptom does not occur) B DTC is not output (Problem symptom occurs) C
- Reconfirm the DTC based on the recorded DTC and Freeze Frame Data (See
DTC CHECK/CLEAR , or
FREEZE FRAME DATA ).
B: GO TO STEP 5
C: GO TO STEP 6
A: Go to Next Step
- DIAGNOSTIC TROUBLE CODE CHART
- Proceed to DIAGNOSTIC TROUBLE CODE CHART .
NEXT: GO TO STEP 7
- SYMPTOM SIMULATION
- Proceed to DIAGNOSIS SYSTEM .
- PROBLEM SYMPTOMS TABLE
- Proceed to PROBLEM SYMPTOMS TABLE .
- CIRCUIT INSPECTION*
- IDENTIFICATION OF PROBLEM
- REPAIR OR REPLACEMENT
- CONFIRMATION TEST*
NEXT: END
NO RELATED
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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.