How to Proceed with Troubleshooting

3MZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM:

HOW TO PROCEED WITH TROUBLESHOOTING

HINT: Techstream can be used in steps 2, 3, 4, 6 and 9.

1. VEHICLE BROUGHT TO WORKSHOP
NEXT -- Continue to next step.
2. CONNECT TECHSTREAM TO DLC3

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

NEXT -- Continue to next step.
3. CHECK DTC AND FREEZE FRAME DATA
(a) Check for DTC(s) and freeze frame data (Freeze Frame Data).

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

NEXT -- Continue to next step.
4. CLEAR DTC AND FREEZE FRAME DATA
(a) Clear the DTC(s) and freeze frame data (Freeze Frame Data).
NEXT -- Continue to next step.
5. CONDUCT VISUAL INSPECTION
NEXT -- Continue to next step.
6. SET CHECK MODE DIAGNOSIS
(a) Set the check mode (Check Mode Procedure).
NEXT -- Continue to next step.
7. CONFIRM PROBLEM SYMPTOMS

HINT: If the engine does not start, perform steps 9 and 11 first.

Result:





B -- GO TO STEP 9
A -- Continue to next step.
8. SIMULATE SYMPTOMS
NEXT -- Continue to next step.
9. CHECK FOR DTCS
(a) Check for DTCs (DTC Check / Clear).
Result:





B -- GO TO STEP 11
A -- Continue to next step.
10. REFER TO DTC CHART

HINT: Refer to the DTC chart (Engine Control System - SFI System).

NEXT -- GO TO STEP 13
11. CONDUCT BASIC INSPECTION

HINT: Refer to "BASIC INSPECTION" (Basic Inspection).

Result:





B -- GO TO STEP 16
A -- Continue to next step.
12. REFER TO PROBLEM SYMPTOMS TABLE

HINT: Refer to "PROBLEM SYMPTOMS TABLE" (Symptom Related Diagnostic Procedures).

Result:





B -- GO TO STEP 16
A -- Continue to next step.
13. CHECK ECM POWER SOURCE CIRCUIT

HINT: Refer to "ECM POWER SOURCE CIRCUIT" (ECM Power Source Circuit).

NEXT -- Continue to next step.
14. CONDUCT CIRCUIT INSPECTION
Result:





B -- GO TO STEP 17
A -- Continue to next step.
15. CHECK FOR INTERMITTENT PROBLEMS

HINT: Refer to "CHECK FOR INTERMITTENT PROBLEMS" (Check For Intermittent Problems).

NEXT -- GO TO STEP 17
16. CONDUCT PARTS INSPECTION
NEXT -- Continue to next step.
17. IDENTIFY PROBLEM
NEXT -- Continue to next step.
18. ADJUST AND/OR REPAIR
NEXT -- Continue to next step.
19. CONDUCT CONFIRMATION TEST
NEXT -- END