How to Proceed with Troubleshooting

1NZ-FXE ENGINE CONTROL SYSTEM: SFI SYSTEM:

HOW TO PROCEED WITH TROUBLESHOOTING

HINT: *: Use Techstream.

1. VEHICLE BROUGHT TO WORKSHOP
NEXT -- Continue to next step.
2. CUSTOMER PROBLEM ANALYSIS
NEXT -- Continue to next step.
3. CONNECT TECHSTREAM TO DLC3*

HINT: If the display indicates a communication fault in the tester, inspect the DLC3.

NEXT -- Continue to next step.
4. CHECK DTC AND FREEZE FRAME DATA*

HINT: Record or print DTCs and freeze frame data, if needed.

NEXT -- Continue to next step.
5. CLEAR DTC AND FREEZE FRAME DATA*
NEXT -- Continue to next step.
6. VISUAL INSPECTION
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7. SETTING CHECK MODE DIAGNOSIS*
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8. PROBLEM SYMPTOM CONFIRMATION
If the engine does not start, first perform the "CHECK DTC" procedures and "CONDUCT BASIC INSPECTION" procedures below.





B -- GO TO STEP 10
A -- Continue to next step.
9. SYMPTOM SIMULATION
NEXT -- Continue to next step.
10. DTC CHECK*





B -- GO TO STEP 12
A -- Continue to next step.
11. DTC CHART
NEXT -- GO TO STEP 14
12. BASIC INSPECTION





B -- GO TO STEP 17
A -- Continue to next step.
13. PERFORM SYMPTOMS TABLE





B -- GO TO STEP 17
A -- Continue to next step.
14. CHECK ECM POWER SOURCE CIRCUIT
NEXT -- Continue to next step.
15. CIRCUIT INSPECTION





B -- GO TO STEP 18
A -- Continue to next step.
16. CHECK FOR INTERMITTENT PROBLEMS
NEXT -- GO TO STEP 18
17. PARTS INSPECTION
NEXT -- Continue to next step.
18. IDENTIFICATION OF PROBLEM
NEXT -- Continue to next step.
19. ADJUSTMENT AND/OR REPAIR
NEXT -- Continue to next step.
20. CONFIRMATION TEST
NEXT -- END