SFI SYSTEM (w/o Secondary Air Injection System) HOW TO PROCEED WITH TROUBLESHOOTING

When using intelligent tester, troubleshoot in accordance with the procedures shown below.

Tech Tips

*: Use the intelligent tester.


  1. VEHICLE BROUGHT TO WORKSHOP


    NEXT

  2. CUSTOMER PROBLEM ANALYSIS


    NEXT

  3. CONNECT INTELLIGENT TESTER TO DLC3*

    Tech Tips

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


    NEXT

  4. CHECK DTC AND FREEZE FRAME DATA*

    Tech Tips

    Record or print DTCs and freeze frame data if needed.


    NEXT

  5. CLEAR DTC AND FREEZE FRAME DATA*


    NEXT

  6. CONDUCT VISUAL INSPECTION


    NEXT

  7. SET CHECK MODE DIAGNOSIS*


    NEXT

  8. CONFIRM PROBLEM SYMPTOMS

    Tech Tips

    If the engine does not start, first perform "check DTC" procedures and "conduct basic inspection" procedures below.

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

    B

    Go to step 10
    A

  9. SIMULATE SYMPTOMS


    NEXT

  10. CHECK DTC*

    Result
    Result Proceed to
    DTC is output A
    DTC is not output B

    B

    Go to step 12
    A

  11. REFER TO DTC CHART


    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

    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 Click here.


      NEXT

  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


    NEXT
    Go to step 18

  17. CONDUCT PARTS INSPECTION


    NEXT

  18. IDENTIFY PROBLEM


    NEXT

  19. ADJUST AND/OR REPAIR


    NEXT

  20. CONDUCT CONFIRMATION TEST


    NEXT
    END
When not using intelligent tester, troubleshoot in accordance with the procedures shown below.

  1. VEHICLE BROUGHT TO WORKSHOP


    NEXT

  2. CUSTOMER PROBLEM ANALYSIS


    NEXT

  3. CHECK AND CLEAR DTC


    NEXT

  4. CONFIRM PROBLEM SYMPTOMS

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

    B

    SIMULATE SYMPTOM
    A

  5. CHECK DTC

    Result
    Result Proceed to
    DTC is output A
    DTC is not output B

    B

    Go to step 7
    A

  6. REFER TO DTC CHART


    NEXT
    Go to step 9

  7. CONDUCT BASIC INSPECTION

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

    B

    Go to step 12
    A

  8. REFER TO PROBLEM SYMPTOMS TABLE

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

    B

    Go to step 12
    A

  9. CHECK ECM POWER SOURCE CIRCUIT


    1. Check the ECM power source Click here.


      NEXT

  10. CONDUCT CIRCUIT INSPECTION

    Result
    Result Proceed to
    Malfunction not confirmed A
    Malfunction confirmed B

    B

    Go to step 13
    A

  11. CHECK FOR INTERMITTENT PROBLEMS


    NEXT
    Go to step 13

  12. CONDUCT PARTS INSPECTION


    NEXT

  13. IDENTIFY PROBLEM


    NEXT

  14. ADJUST AND/OR REPAIR


    NEXT

  15. CONDUCT CONFIRMATION TEST


    NEXT
    END