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 steps 3, 4, 6, and 9.
- Vehicle Brought to Workshop
- Customer Problem Analysis (SEE CUSTOMER PROBLEM ANALYSIS CHECK )
- Connect the OBD II scan tool or hand-held tester to DLC3
- Check and Clear DTC and Freeze Frame Data (SEE DTC CHECK/CLEAR )
- Visual Inspection
- Setting the Check Mode Diagnosis (SEE CHECK MODE PROCEDURE )
- Problem Symptom Confirmation (SEE ROAD TEST )
Symptom does not occur: Go to step 8
Symptom occur: Go to step 9
- Symptom Simulation (SEE )
- DTC Check (SEE DTC CHECK/CLEAR )
DTC is not output: Go to step 10
DTC is output: Go to step 18
- Basic Inspection (SEE ON-VEHICLE INSPECTION
, ADJUSTMENT
and ADJUSTMENT
)
NG: GO TO STEP 20
OK: Go to next step.
- Mechanical System Test (SEE MECHANICAL SYSTEM TESTS )
NG: GO TO NEXT STEP 17
OK: Go to next step.
- Hydraulic Test (SEE HYDRAULIC TEST )
NG: Go to step 17
OK:
- Manual Shifting Test (SEE MANUAL SHIFTING TEST )
NG: Go to next step 15
OK:
- Problem Symptoms Table Chapter 1 (SEE PROBLEM SYMPTOMS TABLE )
NG: Go to step 19
OK:
- Problem Symptoms Table Chapter 2 (SEE PROBLEM SYMPTOMS TABLE )
NG: Go to next step.
- Part Inspection
Go to step 20
- DTC Chart (SEE DIAGNOSTIC TROUBLE CODE CHART )
- Circuit Inspection
- Identification of Problem
- Repair
- Confirmation Test
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.