How to Proceed with Troubleshooting

1NZ-FXE ENGINE CONTROL SYSTEM: SFI SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

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
NEXT -- Continue to next step.

7. SETTING CHECK MODE DIAGNOSIS*
NEXT -- Continue to next step.

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