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.


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  4. CHECK DTC AND FREEZE FRAME DATA*


    1. Check for DTCs Click here and freeze frame data Click here.

      Tech Tips

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


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  5. CLEAR DTC AND FREEZE FRAME DATA*


    1. Clear DTCs and freeze frame data Click here.


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  6. CONDUCT VISUAL INSPECTION


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  7. SET CHECK MODE DIAGNOSIS*


    1. Switch the ECM from normal mode to check mode.

      Tech Tips

      Refer to Check Mode Procedure Click here.


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  8. CONFIRM PROBLEM SYMPTOMS


    1. Confirm problem symptoms.

      Tech Tips


      • Refer to Problem Symptoms Table Click here.

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

      Result Proceed to
      Malfunction does not occur A
      Malfunction occurs B

      B

      GO TO STEP 10
      A

  9. SIMULATE SYMPTOMS

    Tech Tips

    Refer to Symptom Simulation Click here.


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  10. CHECK DTC*


    1. Check for DTCs.

      Tech Tips

      Refer to DTC Check / Clear Click here.

      Result
      Result Proceed to
      Malfunction code A
      No code B

      B

      GO TO STEP 12
      A

  11. REFER TO DTC CHART


    1. Refer to Diagnostic Trouble Code Chart Click here.


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  12. CONDUCT BASIC INSPECTION


    1. Conduct basic inspection Click here.

      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


    1. 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


    1. Check the ECM power source circuit.

      Tech Tips

      Refer to ECM Power Source Circuit Click here.


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  15. CONDUCT CIRCUIT INSPECTION

    Result Proceed to
    Malfunction not confirmed A
    Malfunction confirmed B

    B

    GO TO STEP 18
    A

  16. CHECK FOR INTERMITTENT PROBLEMS


    1. (a) Check for intermittent problems.

      Tech Tips

      Refer to Check for Intermittent Problems Click here.


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  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