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Removal [11/2022 - ]: Procedure

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  1. PRECAUTION 
    NOTE:

    After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal.

    Refer to BEFORE DISCONNECTING BATTERY [11/2022 - 11/2023] , or refer to BEFORE DISCONNECTING BATTERY [11/2023 - ]

  2. WHEN REPLACING BATTERY ECU ASSEMBLY 

    HV battery learning values are stored in the battery ECU assembly and ECM and are used to detect malfunctions and illuminate the hybrid battery indicator light in the combination meter assembly. When either of these ECUs is replaced, the new ECU receives the HV battery learning values from the other ECU and stores them.

    GTY993405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:
    • Do not replace the battery ECU assembly and ECM at the same time as the HV battery learning values will be lost. However, if it is necessary to replace both ECUs at the same time, replace them by following the procedure below.
    • Do not replace the battery ECU assembly or ECM with a used one from another vehicle.
    1. GTY1109297Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Procedure when replacing both battery ECU assembly and ECM:

        1. Disconnect the cable from the negative (-) auxiliary battery terminal.

        2. Replace either ECU.

        3. Connect the cable to the negative (-) auxiliary battery terminal.

        4. Turn the ignition switch on (READY) and wait for 5 minutes or more.

        5. Turn the ignition switch off and disconnect the cable from the negative (-) auxiliary battery terminal.

        6. Replace the other ECU.

        7. Connect the cable to the negative (-) auxiliary battery terminal.

        8. Check that the ignition switch can be turned on (READY).

        HINT: 

        If the battery ECU assembly and ECM are replaced at the same time without following the above procedure, replace either of the ECUs with its original one and then replace it again by following the above procedure. If the correct procedure is not followed, perform the procedure again from the beginning.

  3. REMOVE SERVICE PLUG GRIP 

    Refer to REMOVAL [11/2022 - ] 

  4. REMOVE CONNECTOR COVER ASSEMBLY 
    GTY993405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    		 See step  4 [11/2022 - 12/2024], or see step  4 [12/2024 - ]
  5. CHECK TERMINAL VOLTAGE 
    GTY993405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    		 See step  5 [11/2022 - 12/2024], or see step  5 [12/2024 - ]
  6. INSTALL CONNECTOR COVER ASSEMBLY 
    GTY993405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    		 See step  6
  7. DISCONNECT REAR CENTER SEAT OUTER BELT ASSEMBLY 

    Refer to PROCEDURE - Step 1

  8. REMOVE BENCH TYPE REAR SEAT CUSHION ASSEMBLY 

    Refer to PROCEDURE - Step 3

  9. REMOVE REAR SEAT CUSHION LOCK HOOK 

    Refer to PROCEDURE - Step 6

  10. REMOVE REAR DOOR SCUFF PLATE RH 

    Refer to PROCEDURE - Step 16

  11. REMOVE REAR UNDER SIDE COVER RH 

    See step  11

  12. REMOVE REAR DOOR SCUFF PLATE LH 
    1. Use the same procedure as for the RH side.
  13. REMOVE REAR UNDER SIDE COVER LH 
    1. Use the same procedure as for the RH side.
  14. REMOVE REAR UNDER COVER 

    See step  14

  15. REMOVE REAR SEAT CUSHION LEG SUB-ASSEMBLY 

    See step  15

  16. REMOVE NO. 1 HYBRID BATTERY SHIELD SUB-ASSEMBLY 
    GTY993405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    		 See step  21
  17. REMOVE UPPER HV BATTERY COVER SUB-ASSEMBLY 
    GTY993405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    WARNING:

    Be sure to wear insulated gloves and protective goggles.
    1. GTY1108968Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  18. REMOVE BATTERY ECU ASSEMBLY 
    GTY993405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    WARNING:

    Be sure to wear insulated gloves and protective goggles.

    NOTE:
    • Insulate each disconnected high-voltage connector with insulating tape. Wrap the connector from the wire harness side to the end of the connector.
    • If the battery ECU assembly has been struck or dropped, replace it.
    1. GTY1106181Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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