ECD SYSTEM (w/ 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. VISUAL INSPECTION


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  7. SET CHECK MODE DIAGNOSIS*


    1. Refer to the check mode procedure Click here.


      NEXT

  8. CONFIRM PROBLEM SYMPTOMS

    Tech Tips

    If the engine does not start, first perform the "CHECK DTC" procedures and "BASIC INSPECTION" procedures below.

    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*


    1. Refer to the diagnostic trouble code chart Click here.


      NEXT
      Go to step 13

  11. 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

    If the customer's problem description is applicable to one of the following problems, refer to the troubleshooting on the pages shown below:

    Symptom Condition See page
    Engine difficult to or stalling

    • Engine difficult to start with cold engine

    • Engine difficult to start with warm engine

    • Engine stalls soon after starting

    • Any condition other than those listed above

    Click here

    Black smoke emitted

    • When idling

    • When driving

    Click here

    Rough idling or excessive engine vibration

    • Abnormal initial idling

    • High engine idling speed

    • Low engine idling speed

    Click here

    Lack of power or hesitation

    • Hunting with cold engine

    • Hunting with warm engine

    • Surging with cold engine

    • Surging with warm engine

    • Poor acceleration

    • Poor driveability

    Click here

    Engine knocking or rattling

    • When idling

    • When driving

    Click here

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

    B

    Go to step 16
    A

  13. CHECK ECM POWER SOURCE CIRCUIT


    NEXT

  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. PARTS INSPECTION


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  17. IDENTIFY PROBLEM


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  18. ADJUST AND/OR REPAIR


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  19. CONFIRMATION TEST


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    END