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HYBRID BATTERY SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

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Tip:

  • *: Use the intelligent tester

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


  1. Click here

    VEHICLE BROUGHT TO WORKSHOP


    • NEXT
  2. Click here

    CUSTOMER PROBLEM ANALYSIS


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  3. Click here

    CONNECT INTELLIGENT TESTER TO THE DLC3*

    Tip:

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


    • NEXT
  4. Click here

    CHECK DTC AND SAVE FREEZE FRAME DATA* (Click here), (Click here)

    Tip:

    • 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. Click here

    CLEAR DTC AND FREEZE FRAME DATA*Click here


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  6. Click here

    CONDUCT VISUAL INSPECTION


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  7. Click here

    CONFIRM PROBLEM SYMPTOMS

    Tip:

    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
    • A
  8. Click here

    DUPLICATE CONDITIONS THAT PRODUCE SYMPTOMS


    • NEXT
  9. Click here

    CHECK FOR DTCS* (Click here)

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

    • B
    • GO TO STEP 11
    • A
  10. Click here

    REFER TO DTC CHART (Click here)


    • NEXT
    • GO TO STEP 13
  11. Click here

    CONDUCT BASIC INSPECTION

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

    • B
    • GO TO STEP 15
    • A
  12. Click here

    CHECK ECU POWER SOURCE CIRCUIT


    • NEXT
  13. Click here

    CONDUCT CIRCUIT INSPECTION

    Result
    Result Proceed to
    Malfunction not confirmed A
    Malfunction confirmed B

    • B
    • GO TO STEP 16
    • A
  14. Click here

    CHECK FOR INTERMITTENT PROBLEMS (Click here)


    • NEXT
    • GO TO STEP 16
  15. Click here

    CONDUCT PARTS INSPECTION


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  16. Click here

    IDENTIFY PROBLEM


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  17. Click here

    ADJUST AND/OR REPAIR


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  18. Click here

    CONDUCT CONFIRMATION TEST


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    • END