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 on the CAN communication system first.


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  4. CHECK DTC AND FREEZE FRAME DATA*


    1. Check the DTC Click here and check the 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. Check the DTCs and freeze frame data Click here.


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  6. CONDUCT VISUAL INSPECTION


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  7. SELECT 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

      If the engine does not start, first perform the "Check 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

    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
      DTC is output A
      DTC is not output B

      B

      GO TO STEP 12
      A

  11. REFER TO DTC CHART

    Tech Tips

    Refer to Diagnostic Trouble Code Chart Click here.


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  12. CONDUCT BASIC INSPECTION


    1. Conduct basic inspection.

      Tech Tips

      Refer to 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

    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


    1. Check the ECM power source circuit.

      Tech Tips

      Refer to the ECM Power Source Circuit 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


    1. 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