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Home >> Lexus >> 2023 >> ES 300h Base >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Electric Motor Systems >> Hybrid Battery Control System - Service Information (2 Of 3) >> HV BATTERY (for NICKEL METAL HYDRIDE BATTERY) >> Removal [08/2021 - 09/2022] >> Procedure

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

  1. PRECAUTION 

    Refer to PRECAUTION [06/2018 - ]

  2. REMOVE SERVICE PLUG GRIP 

    Refer to REMOVAL [08/2021 - 09/2022]

  3. DISCONNECT ENGINE ROOM MAIN WIRE 

    Refer to PROCEDURE - Step 3

  4. REMOVE CONNECTOR COVER ASSEMBLY 

    Refer to PROCEDURE - Step 10

  5. CHECK TERMINAL VOLTAGE 

    Refer to PROCEDURE - Step 11

  6. INSTALL CONNECTOR COVER ASSEMBLY 
    WARNING:

    Be sure to wear insulated gloves.

    1. Using a T25 "TORX" socket wrench, install the connector cover assembly to the inverter with converter assembly with the bolt (A).

      Torque: 4.5 N.m (46 kgf/cm, 40 in.lbf) 

      NOTE:

      Do not touch the waterproof seal of the connector cover assembly.

      GTY744251Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Bolt (A)
      *b Bolt (B)
    2. Install the bolt (B).

      Torque: 8.0 N.m (82 kgf/cm, 71 in.lbf) 

  7. CONNECT ENGINE ROOM MAIN WIRE 

    Refer to PROCEDURE - Step 18

  8. REMOVE BATTERY COOLING BLOWER ASSEMBLY 

    Refer to REMOVAL [06/2018 - ]

  9. REMOVE NO. 1 HV BATTERY COVER PANEL RH 
    WARNING:

    Be sure to wear insulated gloves.

    1. Using the service plug grip, remove the battery cover lock striker.
      GTY757694Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Service Plug Grip
      *2 Battery Cover Lock Striker
      *a Projection
      *b Turn
      *c Button

      HINT: 

      Insert the projection of the service plug grip and turn the button of the battery cover lock striker counterclockwise to release the lock.

    2. Remove the 3 bolts, 3 nuts and No. 1 HV battery cover panel RH from the HV battery.
  10. DISCONNECT FLOOR UNDER WIRE 
    WARNING:

    Be sure to wear insulated gloves.

    1. Disconnect the 2 HV battery junction block assembly connectors.
      GTY758635Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Shield Ground
      NOTE:

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

    2. Disconnect the shield ground from the HV battery.
    3. Disconnect the floor wire connector.
      GTY762797Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. 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.
  12. REMOVE NO. 2 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY 

    Refer to PROCEDURE - Step 4

  13. DISCONNECT FLOOR WIRE 
    WARNING:

    Be sure to wear insulated gloves.

    1. Disengage the 2 clamps to disconnect the floor wire.
      GTY773437Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  14. REMOVE NO. 1 HYBRID BATTERY EXHAUST DUCT 
    WARNING:

    Be sure to wear insulated gloves.

    1. Remove the clip.
      GTY762795Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disengage the claw to remove the No. 1 hybrid battery exhaust duct from the HV battery.
  15. DISCONNECT FLOOR WIRE 
    WARNING:

    Be sure to wear insulated gloves.

    1. Disengage the clamp.
      GTY762796Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the battery voltage sensor connector.
  16. REMOVE HV BATTERY 
    WARNING:

    Be sure to wear insulated gloves.

    1. Remove the 5 bolts and HV battery from the vehicle body.
      GTY773434Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:
      • Do not allow foreign matter, such as grease or oil, to adhere to the bolts of the HV battery.
      • To prevent the wire harness from being caught, make sure to bundle the wire harness using insulating tape or equivalent.
      • Use cardboard or another similar material to protect the HV battery and vehicle body from damage.
      • Since the HV battery is very heavy, 2 people are needed to remove it. When removing the HV battery, be careful not to damage the parts around it.
      • When removing the HV battery from the vehicle, do not allow it to contact the vehicle.
      • When removing/installing/moving the HV battery, make sure not to tilt it more than 80°.
      • Insulate the disconnected terminals or connectors with insulating tape.
      • If the HV battery has been struck or dropped, replace it.
  17. REMOVE NO. 4 HV BATTERY SHIELD SUB-ASSEMBLY 
    WARNING:

    Be sure to wear insulated gloves.

    1. Remove the 4 nuts and No. 4 HV battery shield sub-assembly from the HV battery.
      GTY773436Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  18. REMOVE NO. 3 HV BATTERY SHIELD SUB-ASSEMBLY 
    WARNING:

    Be sure to wear insulated gloves.

    1. Remove the 4 nuts and No. 3 HV battery shield sub-assembly from the HV battery.
      GTY762794Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  19. REMOVE NO. 4 HV BATTERY END PLATE SUB-ASSEMBLY 
    WARNING:

    Be sure to wear insulated gloves.

    1. Remove the 2 bolts, 2 nuts and No. 4 HV battery end plate sub-assembly from the HV battery.
      GTY750754Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Bolt
      *b Nut
  20. REMOVE NO. 5 HV BATTERY END PLATE SUB-ASSEMBLY 
    WARNING:

    Be sure to wear insulated gloves.

    1. Remove the 12 nuts and No. 5 HV battery end plate sub-assembly from the HV battery.
      GTY762793Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  21. REMOVE UPPER HV BATTERY COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 3

  22. REMOVE NO. 1 HV BATTERY SHIELD PANEL 

    Refer to PROCEDURE - Step 4

  23. REMOVE BATTERY VOLTAGE SENSOR 

    Refer to PROCEDURE - Step 5

  24. REMOVE HYBRID BATTERY TERMINAL BLOCK 

    Refer to PROCEDURE - Step 4

  25. REMOVE HV BATTERY JUNCTION BLOCK ASSEMBLY 

    Refer to PROCEDURE - Step 19

  26. REMOVE NO. 2 HYBRID BATTERY SHIELD SUB-ASSEMBLY 

    See step  4

  27. REMOVE NO. 1 HV BATTERY INTAKE DUCT LH 

    See step  5