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
- CONNECT INTELLIGENT TESTER TO DLC3*
HINT:
If the display indicates a communication fault in the tester, inspect the DLC3.
- CHECK DTC AND FREEZE FRAME DATA*
HINT:
Record or print DTCs and freeze frame data, if necessary.
- CLEAR DTC AND FREEZE FRAME DATA*
- CONDUCT VISUAL INSPECTION
- SET CHECK MODE DIAGNOSIS*
- CONFIRM PROBLEM SYMPTOMS
HINT:
If the engine does not start, perform steps 10 and 12 first.
DTC RESULT DESCRIPTIONResult Proceed To Malfunction does not occur A Malfunction occurs B B: GO TO STEP 10
A: Go TO NEXT STEP
- SIMULATE SYMPTOMS
- CHECK DTC* DTC RESULT DESCRIPTION
Result Proceed To Malfunction code A No code B B: GO TO STEP 12
A: Go TO NEXT STEP
- REFER TO DTC TABLE
- CONDUCT BASIC INSPECTION DTC RESULT DESCRIPTION
Result Proceed To Malfunctioning parts not confirmed A Malfunctioning parts confirmed B B: GO TO STEP 17
A: Go TO NEXT STEP
- REFER TO PROBLEM SYMPTOMS TABLE DTC RESULT DESCRIPTION
Result Proceed To Malfunctioning circuit confirmed A Malfunctioning parts confirmed B B: GO TO STEP 17
A: Go TO NEXT STEP
- CHECK ECM POWER SOURCE CIRCUIT
- CONDUCT CIRCUIT INSPECTION DTC RESULT DESCRIPTION
Result Proceed To Malfunction not confirmed A Malfunction confirmed B B: GO TO STEP 18
A: Go TO NEXT STEP
- CHECK FOR INTERMITTENT PROBLEMS
- CONDUCT PARTS INSPECTION
- IDENTIFY PROBLEM
- ADJUST AND/OR REPAIR
- CONDUCT CONFIRMATION TEST
NEXT: END
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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.
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