SFI SYSTEM (w/ EGR 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 with the intelligent 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*

    Tech Tips

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


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  5. CLEAR DTC AND FREEZE FRAME DATA*


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  6. CONDUCT VISUAL INSPECTION


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  7. SELECT 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 DTC" procedure and "Conduct Basic Inspection" procedure 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 Problem Symptoms Table Click here.


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  10. CHECK DTC*

    Tech Tips

    Refer to DTC Check / Clear Click here.

    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

    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 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 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

    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