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:
The Techstream can be used in steps 2, 3, 4, 6 and 9.
- VEHICLE BROUGHT TO WORKSHOP
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
- Check for DTC(s) and freeze frame data. Refer to FREEZE FRAME DATA .
HINT:
Record or print the DTCs and freeze frame data, if necessary.
NEXT: Go to next step
- Check for DTC(s) and freeze frame data. Refer to FREEZE FRAME DATA .
- CLEAR DTC AND FREEZE FRAME DATA
- Clear the DTC(s) and freeze frame data. Refer to FREEZE FRAME DATA .
NEXT: Go to next step
- Clear the DTC(s) and freeze frame data. Refer to FREEZE FRAME DATA .
- CONDUCT VISUAL INSPECTION
NEXT: Go to next step
- SET CHECK MODE DIAGNOSIS
- Set the check mode. Refer to CHECK MODE PROCEDURE .
NEXT: Go to next step
- Set the check mode. Refer to CHECK MODE PROCEDURE .
- CONFIRM PROBLEM SYMPTOMS
HINT:
If the engine does not start, perform steps 9 and 11 first.
Result
Result Proceed to Malfunction does not occur A Malfunction occurs B B → GO TO STEP 9
A: Go to next step
- SIMULATE SYMPTOMS
NEXT: Go to next step
- CHECK FOR DTCS
- Check for DTCs. Refer to DTC CHECK / CLEAR .
Result
Result Proceed to Trouble code A No code B B → GO TO STEP 11
A: Go to next step
- Check for DTCs. Refer to DTC CHECK / CLEAR .
- REFER TO DTC CHART
HINT:
Refer to the DTC chart. Refer to DIAGNOSTIC TROUBLE CODE CHART .
NEXT → GO TO STEP 13
- CONDUCT BASIC INSPECTION
HINT:
Refer to "BASIC INSPECTION". Refer to BASIC INSPECTION .
Result
Result Proceed to Malfunctioning parts not confirmed A Malfunctioning parts confirmed B B → GO TO STEP 16
A: Go to next step
- REFER TO PROBLEM SYMPTOMS TABLE
HINT:
Refer to "PROBLEM SYMPTOMS TABLE". Refer to PROBLEM SYMPTOMS TABLE .
Result
Result Proceed to Malfunctioning circuit confirmed A Malfunctioning parts confirmed B B → GO TO STEP 16
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
Result Proceed to Malfunction not confirmed A Malfunction confirmed B B → GO TO STEP 17
A: Go to next step
- CHECK FOR INTERMITTENT PROBLEMS
HINT:
Refer to "CHECK FOR INTERMITTENT PROBLEMS". Refer to CHECK FOR INTERMITTENT PROBLEMS .
NEXT → GO TO STEP 17
- 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
Use the Manual With the Right Hardware
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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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