How to Proceed with Troubleshooting

3MZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

HINT
The Techstream should be used in steps 3, 4, 5, 7 and 10.

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 with the Techstream, 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 necessary.

NEXT -- Continue to next step.

5. CLEAR DTC AND FREEZE FRAME DATA

NEXT -- Continue to next step.

6. CONDUCT VISUAL INSPECTION

NEXT -- Continue to next step.

7. SET CHECK MODE DIAGNOSIS

NEXT -- Continue to next step.

8. CONFIRM PROBLEM SYMPTOMS

HINT
If the engine does not start, perform steps 10 and 12 first.

Result:





B -- GO TO STEP 10
A -- Continue to next step.

9. SIMULATE SYMPTOMS

NEXT -- Continue to next step.

10. CHECK FOR DTC

Result:





B -- GO TO STEP 12
A -- Continue to next step.

11. REFER TO DTC CHART

NEXT -- GO TO STEP 14

12. CONDUCT BASIC INSPECTION

Result:





B -- GO TO STEP 17
A -- Continue to next step.

13. REFER TO PROBLEM SYMPTOMS TABLE

Result:





B -- GO TO STEP 17
A -- Continue to next step.

14. CHECK ECM POWER SOURCE CIRCUIT

NEXT -- Continue to next step.

15. CONDUCT CIRCUIT INSPECTION

Result:





B -- GO TO STEP 18
A -- Continue to next step.

16. CHECK FOR INTERMITTENT PROBLEMS

NEXT -- GO TO STEP 18

17. CONDUCT PARTS INSPECTION

NEXT -- Continue to next step.

18. IDENTIFY PROBLEM

NEXT -- Continue to next step.

19. ADJUST AND/OR REPAIR

NEXT -- Continue to next step.

20. CONDUCT CONFIRMATION TEST

NEXT -- END