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
The hand-held tester can be used at step 3, 4, 5, 7, 10.
- VEHICLE BROUGHT TO WORKSHOP
- Go to next step
- CUSTOMER PROBLEM ANALYSIS (See CUSTOMER PROBLEM ANALYSIS CHECK )
- Go to next step
- CONNECT HAND-HELD TESTER TO DLC3
HINT:
If the display indicates a communication fault in the tool, inspect DLC3.
- Go to next step
- CHECK DTC AND FREEZE FRAME DATA (See DTC CHECK/CLEAR )
HINT:
Record or print DTC and freeze frame data, if needed.
- Go to next step
- CLEAR DTC AND FREEZE FRAME DATA (See DTC CHECK/CLEAR )
- Go to next step
- VISUAL INSPECTION
- Go to next step
- SETTING CHECK (TEST) MODE DIAGNOSIS (See CHECK MODE PROCEDURE )
- Go to next step
- PROBLEM SYMPTOM CONFIRMATION
HINT:
If the engine does not start, perform steps 10 and 12 first.
MALFUNCTION REFERENCEA Malfunction does not occur B Malfunction occurs - B: GO TO step 10
- A: GO TO NEXT STEP.
- SYMPTOM SIMULATION
- Go to next step
- DTC CHECK (See DTC CHECK/CLEAR ) MALFUNCTION CODE REFERENCE
A Malfunction code B No code - B: GO TO step 12
- A: GO TO NEXT STEP.
- DTC CHART (See DTC CHECK/CLEAR )
- GO TO step 14
- BASIC INSPECTION (See BASIC INSPECTION ) BASIC INSPECTION REFERENCE
A Wrong parts not confirmed B Wrong parts confirmed - B: GO TO step 17
- A: GO TO NEXT STEP.
- PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE ) PROBLEM SYMPTOMS REFERENCE
A Wrong circuit confirmed B Wrong parts confirmed - B: GO TO step 17
- A: GO TO NEXT STEP.
- CHECK ECM POWER SOURCE CIRCUIT (See ECM POWER SOURCE CIRCUIT )
- Go to next step
- CIRCUIT INSPECTION MALFUNCTION REFERENCE
A Malfunction not confirmed B Malfunction confirmed - B: GO TO step 18
- A: GO TO NEXT STEP.
- CHECK FOR INTERMITTENT PROBLEMS (See CHECK FOR INTERMITTENT PROBLEMS )
- GO TO STEP TO 18
- PARTS INSPECTION
- GO TO NEXT STEP.
- IDENTIFICATION OF PROBLEM
- GO TO NEXT STEP.
- ADJUSTMENT, REPAIR
- GO TO NEXT STEP.
- CONFIRMATION TEST
- END
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.
