ECD SYSTEM (w/o EGR Cooler) HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use these procedures to troubleshoot the ECD system.

  • *: 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 tester, inspect the DLC3.


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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. SET CHECK MODE DIAGNOSIS*


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  8. CONFIRM PROBLEM SYMPTOMS

    Tech Tips

    If the engine does not start, perform steps 10 and 12 first.

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

    B

    SIMULATE SYMPTOMS
    A

  9. CHECK DTC

    Result
    Result Proceed to
    Malfunction code A
    No malfunction code B

    B

    Go to step 11
    A

  10. REFER TO DTC CHART*


    NEXT
    Go to step 13

  11. CONDUCT BASIC INSPECTION

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

    B

    Go to step 16
    A

  12. REFER TO PROBLEM SYMPTOMS TABLE

    Tech Tips


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

    B

    Go to step 16
    A

  13. CHECK ECM POWER SOURCE CIRCUIT


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  14. CONDUCT CIRCUIT INSPECTION

    Result
    Result Proceed to
    Malfunction not confirmed A
    Malfunction confirmed B

    B

    Go to step 17
    A

  15. CHECK FOR INTERMITTENT PROBLEMS


    NEXT
    Go to step 18

  16. CONDUCT PARTS INSPECTION


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  17. IDENTIFY PROBLEM


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  18. ADJUST AND/OR REPAIR


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  19. CONDUCT CONFIRMATION TEST


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    END