How to Proceed with Troubleshooting

2TR-FE ENGINE CONTROL: SFI SYSTEM: 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.

When any CAN communication system DTCs are output, perform troubleshooting for the CAN communication system first.

NEXT -- Continue to next step.

4. CHECK DTC AND FREEZE FRAME DATA*

HINT
If necessary, record or print DTCs and freeze frame data.

* Check for DTCs DTC Check / Clear.
* Check the freeze frame data Freeze Frame Data.
NEXT -- Continue to next step.

5. CLEAR DTC AND FREEZE FRAME DATA*

HINT
Refer to the relevant section DTC Check / Clear.

NEXT -- Continue to next step.

6. CONDUCT VISUAL INSPECTION

NEXT -- Continue to next step.

7. SET CHECK MODE DIAGNOSIS*

HINT
Refer to Check Mode Procedure Check Mode Procedure.

NEXT -- Continue to next step.

8. CONFIRM PROBLEM SYMPTOMS

HINT
* Refer to Problem Symptoms Table Symptom Related Diagnostic Procedures.
* If the engine does not start, first perform the Check for DTC procedure and Conduct Basic Inspection procedure below.






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

9. SIMULATE SYMPTOMS

NEXT -- Continue to next step.

10. CHECK FOR DTC*

HINT
Refer to the relevant section DTC Check / Clear.





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

11. REFER TO DTC CHART

HINT
Refer to the relevant section Engine Control System - SFI System.

NEXT -- GO TO STEP 14

12. CONDUCT BASIC INSPECTION





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

13. REFER TO PROBLEM SYMPTOMS TABLE

HINT
Refer to Problem Symptoms Table Symptom Related Diagnostic Procedures.





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

14. CHECK ECM POWER SOURCE CIRCUIT

HINT
Refer to the relevant section ECM Power Source Circuit.

NEXT -- Continue to next step.

15. CONDUCT CIRCUIT INSPECTION





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