HYBRID CONTROL SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

DTC Code DTC Name
HOW TO PROCEED WITH TROUBLESHOOTING

CAUTION / NOTICE / HINT

Tech Tips


  • *: Use the intelligent tester

  • Use the following procedure to troubleshoot the hybrid control system.

PROCEDURE


  1. VEHICLE BROUGHT TO WORKSHOP

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  2. CUSTOMER PROBLEM ANALYSIS

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  3. CONNECT INTELLIGENT TESTER TO THE DLC3*

    Tech Tips

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

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  4. CHECK DTC AND SAVE FREEZE FRAME DATA*

    Click here

    Tech Tips


    • Make sure to save freeze frame data because the data is necessary for a simulation test.

    • For the hybrid vehicle control system, there are many DTCs, many of which can be stored due to a single malfunction. As a result, in some of the diagnosis procedures an instruction is provided to check for other DTCs and their corresponding INF codes. By following the diagnosis path based on the combination of output DTCs and INF codes, it is possible to narrow down the problem early and avoid unnecessary diagnosis.

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  5. CLEAR DTC AND FREEZE FRAME DATA*

    Click here

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  6. CONDUCT VISUAL INSPECTION

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  7. CONFIRM PROBLEM SYMPTOMS

    Tech Tips

    If the engine does not start, perform steps 9 and 11 first.

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

    B

    GO TO STEP 10 Click here

    A

  8. DUPLICATE CONDITIONS THAT PRODUCE SYMPTOMS

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  9. CHECK FOR DTCS*

    Click here

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

    B

    CONDUCT BASIC INSPECTION Click here

    A

  10. REFER TO DTC CHART

    Tech Tips

    DTCs for the hybrid control system and hybrid battery system are displayed using the same menus on the intelligent tester. It is necessary to check the DTC charts for hybrid control system and hybrid battery system.


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    GO TO STEP 13 Click here

  11. CONDUCT BASIC INSPECTION

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

    B

    CONDUCT PARTS INSPECTION Click here

    A

  12. CHECK ECU POWER SOURCE CIRCUIT

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    NEXT

    NEXT

  13. CONDUCT CIRCUIT INSPECTION

    Result
    Result Proceed to
    Malfunction not confirmed. A
    Malfunction confirmed. B

    B

    GO TO STEP 16 Click here

    A

  14. CHECK FOR INTERMITTENT PROBLEMS

    Click here

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    NEXT

    GO TO STEP 16 Click here

  15. CONDUCT PARTS INSPECTION

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  16. IDENTIFY PROBLEM

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  17. ADJUST AND/OR REPAIR

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  18. CONDUCT CONFIRMATION TEST

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    END