HYBRID BATTERY SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • *: Use the intelligent tester

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


  1. VEHICLE BROUGHT TO WORKSHOP


    NEXT
  2. CUSTOMER PROBLEM ANALYSIS


    NEXT
  3. CONNECT INTELLIGENT TESTER TO THE DLC3*

    Tech Tips

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


    NEXT
  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.


    NEXT
  5. CLEAR DTC AND FREEZE FRAME DATA* Click here


    NEXT
  6. CONDUCT VISUAL INSPECTION


    NEXT
  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
    A
  8. DUPLICATE CONDITIONS THAT PRODUCE SYMPTOMS


    NEXT
  9. CHECK FOR DTCS* Click here

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

    B
    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.



    NEXT
  11. CONDUCT BASIC INSPECTION

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

    B
    A
  12. CHECK ECU POWER SOURCE CIRCUIT


    NEXT
  13. CONDUCT CIRCUIT INSPECTION

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

    B
    A
  14. CHECK FOR INTERMITTENT PROBLEMS Click here


    NEXT
  15. CONDUCT PARTS INSPECTION


    NEXT
  16. IDENTIFY PROBLEM


    NEXT
  17. ADJUST AND/OR REPAIR


    NEXT
  18. CONDUCT CONFIRMATION TEST


    NEXT