ECD 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 tester, inspect the DLC3. When any CAN communication system DTCs are output, perform troubleshooting on the CAN communication system first.

    Note

    Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.


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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
    Trouble code A
    No code B

    B

    GO TO STEP 12
    A

  11. REFER TO DTC CHART

    Tech Tips

    Refer to DTC 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


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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