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 Techstream.
- VEHICLE BROUGHT TO WORKSHOP
NEXT: Go to next step
- CUSTOMER PROBLEM ANALYSIS
NEXT: Go to next step
- CONNECT TECHSTREAM TO DLC3
HINT:
If the display indicates a communication fault in the Techstream, inspect the DLC3.
NEXT: Go to next step
- CHECK DTC AND FREEZE FRAME DATA*
HINT:
Record or print DTCs and freeze frame data, if necessary.
NEXT: Go to next step
- CLEAR DTC AND FREEZE FRAME DATA*
NEXT: Go to next step
- CONDUCT VISUAL INSPECTION
NEXT: Go to next step
- SELECT CHECK MODE DIAGNOSIS*
NEXT: Go to next step
- CONFIRM PROBLEM SYMPTOMS
HINT:
If the engine does not start, first perform the "Check DTC" procedures and "Conduct Basic Inspection" procedures below.
Result Proceed to Malfunction does not occur A Malfunction occurs B B → GO TO STEP 10
A: Go to next step
- SIMULATE SYMPTOMS
HINT:
Refer to Problem Symptoms Table. Refer to PROBLEM SYMPTOMS TABLE .
NEXT: Go to next step
- CHECK DTC*
HINT:
Refer to DTC Check / Clear.
Result Proceed to Trouble code A No code B B → GO TO STEP 12
A: Go to next step
- REFER TO DTC CHART
HINT:
Refer to Diagnostic Trouble Code Chart. Refer to DIAGNOSTIC TROUBLE CODE CHART .
NEXT: Go to next step
- CONDUCT BASIC INSPECTION
HINT:
Refer to Basic Inspection. Refer to BASIC INSPECTION .
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
HINT:
Refer to Problem Symptoms Table. Refer to PROBLEM SYMPTOMS TABLE .
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
HINT:
Refer to ECM Power Source Circuit. Refer to ECM Power Source Circuit .
NEXT: Go to next step
- CONDUCT CIRCUIT INSPECTION
Result Proceed to Malfunction not confirmed A Malfunction confirmed B B → GO TO STEP 18
A: Go to next step
- CHECK FOR INTERMITTENT PROBLEMS
NEXT: Go to next step
- CONDUCT PARTS INSPECTION
NEXT: Go to next step
- IDENTIFY PROBLEM
NEXT: Go to next step
- ADJUST AND/OR REPAIR
NEXT: Go to next step
- 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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