SFI SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips

*: Use the intelligent tester.


  1. VEHICLE BROUGHT TO WORKSHOP


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  2. CUSTOMER PROBLEM ANALYSIS


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  3. CONNECT INTELLIGENT TESTER TO DLC3*

    Tech Tips

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

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


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  4. CHECK DTC AND FREEZE FRAME DATA*

    Tech Tips

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




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  5. CLEAR DTC AND FREEZE FRAME DATA*

    Tech Tips

    Refer to the relevant pages Click here.


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  6. CONDUCT VISUAL INSPECTION


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  7. SET CHECK MODE DIAGNOSIS*

    Tech Tips

    Refer to Check Mode Procedure Click here.


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  8. CONFIRM PROBLEM SYMPTOMS

    Tech Tips


    • Refer to Problem Symptoms Table Click here.

    • If the engine does not start, first perform the Check for DTC procedure and Conduct Basic Inspection procedure below.

      Result
      Result Proceed to
      Malfunction does not occur A
      Malfunction occurs B

    B

    GO TO STEP 10
    A

  9. SIMULATE SYMPTOMS


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  10. CHECK FOR DTC*

    Tech Tips

    Refer to the relevant pages Click here.

    Result
    Result Proceed to
    Trouble code output A
    No trouble code output B

    B

    GO TO STEP 12
    A

  11. REFER TO DTC CHART

    Tech Tips

    Refer to the relevant pages Click here.


    NEXT
    GO TO STEP 14

  12. CONDUCT BASIC INSPECTION

    Result
    Result Proceed to
    Malfunctioning parts not confirmed A
    Malfunctioning parts confirmed B

    B

    GO TO STEP 17
    A

  13. REFER TO PROBLEM SYMPTOMS TABLE

    Tech Tips

    Refer to Problem Symptoms Table Click here.

    Result
    Result Proceed to
    Malfunctioning circuit confirmed A
    Malfunctioning parts confirmed B

    B

    GO TO STEP 17
    A

  14. CHECK ECM POWER SOURCE CIRCUIT

    Tech Tips

    Refer to the relevant pages Click here.


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  15. CONDUCT CIRCUIT INSPECTION

    Result
    Result Proceed to
    Malfunction not confirmed A
    Malfunction confirmed B

    B

    GO TO STEP 18
    A

  16. CHECK FOR INTERMITTENT PROBLEMS


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    GO TO STEP 18

  17. CONDUCT PARTS INSPECTION


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  18. IDENTIFY PROBLEM


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  19. ADJUST AND/OR REPAIR


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  20. CONDUCT CONFIRMATION TEST


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    END