How to Proceed with Troubleshooting

2UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

HOW TO PROCEED WITH TROUBLESHOOTING
HINT: *: Use the 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 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, first perform the "CHECK DTC" procedures and "CONDUCT BASIC INSPECTION" procedures below.

Result





B -- GO TO STEP 10
A -- Continue to next step.
9. SIMULATE SYMPTOMS
NEXT -- Continue to next step.
10. CHECK 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