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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 33 (Hybrid Battery Control System - Service Information (3 Of 3)) >> HV RELAY ASSEMBLY (for LITHIUM-ION BATTERY) >> Removal [09/2022 - ] >> Procedure

Removal [09/2022 - ]: Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
  1. REMOVE SERVICE PLUG GRIP 

    Refer to REMOVAL [09/2022 - ] 

  2. DISCONNECT ENGINE ROOM MAIN WIRE 

    See step  3

  3. REMOVE CONNECTOR COVER ASSEMBLY 

    Refer to PROCEDURE - Step 10

  4. CHECK TERMINAL VOLTAGE 

    Refer to PROCEDURE - Step 11

  5. INSTALL CONNECTOR COVER ASSEMBLY 

    Refer to PROCEDURE - Step 6

  6. CONNECT ENGINE ROOM MAIN WIRE 

    See step  18

  7. REMOVE REAR SEAT CUSHION ASSEMBLY 

    Refer to PROCEDURE - Step 3

  8. REMOVE REAR SEAT CUSHION LOCK HOOK 

    Refer to PROCEDURE - Step 5

  9. REMOVE REAR DOOR SCUFF PLATE LH 

    Refer to PROCEDURE - Step 9

  10. REMOVE REAR UNDER SIDE COVER LH 

    See step  4

  11. REMOVE REAR DOOR SCUFF PLATE RH 

    HINT: 

    Use the same procedure as for the LH side.

  12. REMOVE REAR UNDER SIDE COVER RH 

    See step  6

  13. REMOVE REAR UNDER COVER 

    See step  7

  14. REMOVE REAR SEAT CUSHION LEG SUB-ASSEMBLY 

    See step  8

  15. REMOVE NO. 1 HV BATTERY COVER PANEL RH 

    Refer to PROCEDURE - Step 9

  16. DISCONNECT FLOOR UNDER WIRE 
    WARNING:

    Be sure to wear insulated gloves.

    1. Disconnect the 2 HV battery junction block assembly connectors.
      NOTE:

      Insulate each disconnected high-voltage connector with insulating tape. Wrap the connector from the wire harness side to the end of the connector.

      GTY1092206Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A Type A *B Type B
      *a Shield Ground - -
    2. Disconnect the shield ground from the HV battery.
  17. DISCONNECT FLOOR WIRE 

    Refer to PROCEDURE - Step 11

  18. REMOVE HV BATTERY JUNCTION BLOCK ASSEMBLY 
    WARNING:

    Be sure to wear insulated gloves and protective goggles.

    1. Disengage the claw and open the wiring harness protector.
      GTY1095386Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A Type A *B Type B
    2. Disconnect the HV battery junction block assembly connector.
      NOTE:

      Insulate the disconnected high-voltage connector with insulating tape.

      GTY1091042Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A Type A *B Type B
    3. Disconnect the hybrid battery terminal block connector.
      NOTE:

      Insulate the disconnected high-voltage connector with insulating tape.

    4. Remove the bolt and electric vehicle battery plug assembly from the HV battery.
      GTY773737Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Disconnect the 2 HV battery junction block assembly connectors.
      NOTE:

      Insulate the disconnected high-voltage connectors with insulating tape.

      GTY1093375Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A Type A *B Type B
    6. Using a screwdriver with its tip wrapped with protective tape, disengage the claw and remove the wiring harness protector.
      GTY1097029Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A Type A *B Type B
      *a Protective Tape - -
    7. Remove the 4 nuts and HV battery junction block assembly from the HV battery.
      NOTE:

      If the HV battery junction block assembly has been struck or dropped, replace it with a new one.

      GTY764150Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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