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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 >> Removal [08/2021 - 09/2022] >> Procedure

Removal [08/2021 - 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 [08/2021 - 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 NO. 2 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY 

    Refer to REMOVAL [06/2018 - ]

  8. REMOVE REAR DOOR SCUFF PLATE LH 

    Refer to PROCEDURE - Step 9

  9. REMOVE REAR UNDER SIDE COVER LH 

    See step  4

  10. REMOVE REAR DOOR SCUFF PLATE RH 

    HINT: 

    Use the same procedure as for the LH side.

  11. REMOVE REAR UNDER SIDE COVER RH 

    See step  6

  12. REMOVE REAR UNDER COVER 

    See step  7

  13. REMOVE REAR SEAT CUSHION LEG SUB-ASSEMBLY 

    See step  8

  14. REMOVE NO. 1 HV BATTERY COVER PANEL RH 

    Refer to PROCEDURE - Step 9

  15. DISCONNECT FLOOR UNDER WIRE 

    Refer to PROCEDURE - Step 10

  16. DISCONNECT FLOOR WIRE 
    WARNING:

    Be sure to wear insulated gloves.

    1. Disengage the clamp.
      GTY762800Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the electric vehicle battery plug assembly connector.
    3. Disconnect the HV battery junction block assembly connector.
    4. Disengage the 2 clamps to disconnect the floor wire.
      GTY773437Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  17. REMOVE NO. 1 HYBRID BATTERY EXHAUST DUCT 

    Refer to PROCEDURE - Step 14

  18. REMOVE UPPER HV BATTERY COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 3

  19. REMOVE HV BATTERY JUNCTION BLOCK ASSEMBLY 
    WARNING:

    Be sure to wear insulated gloves and protective goggles.

    1. Remove the bolt and disconnect the electric vehicle battery plug assembly.
      GTY762990Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the HV battery junction block assembly connector.
      GTY762992Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Insulate the disconnected connectors with insulating tape.

    3. Disengage the clamp.
    4. Disengage the 2 claws and open the wiring harness protector.
      GTY762987Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Disconnect the HV battery junction block assembly connector.
      NOTE:

      Insulate the disconnected connectors with insulating tape.

      GTY762988Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using a screwdriver with its tip wrapped with protective tape, disengage the 2 claws and remove the wiring harness protector.
      GTY753646Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Protective Tape
    7. Disconnect the HV battery junction block assembly connector.
      GTY773479Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. 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.

      GTY762984Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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