Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM100000001GCPS
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 09/2022]
Title: HYBRID / BATTERY CONTROL: HV BATTERY (for NICKEL METAL HYDRIDE BATTERY): REMOVAL; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during HV battery removal/installation are shown below.

Necessary Procedures After Parts Removed/Installed/Replaced

Replaced Part or Performed Procedure

Necessary Procedure

Effect/Inoperative Function when Necessary Procedure not Performed

Link

Auxiliary battery terminal is disconnected/reconnected

Perform steering sensor zero point calibration

Lane Control System

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; PRE-COLLISION: PRE-COLLISION SYSTEM (for HV Model): INITIALIZATION

Pre-collision System

Replacement of HV battery

Battery status info update

HV battery status information cannot be updated

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): UTILITY

CAUTION:

  • Orange wire harnesses and connectors indicate high-voltage circuits. To prevent electric shock, always follow the procedure described in the repair manual.

    Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): PRECAUTION

  • To prevent electric shock, wear insulated gloves when working on wire harnesses and components of the high voltage system.

NOTICE:

  • If the HV battery has been struck or dropped, replace it.
  • When connecting a connector to the HV battery, confirm that the connector is securely connected through the following:

    - Push the connector until a click sound is heard.

    - Visually check and confirm that the connector is securely connected by pulling on it.

  • Make sure to insulate the high-voltage connectors and terminals of the HV battery with insulating tape after removing it.

    If the HV battery stored without insulating the connectors and terminals, electric shock or fire may result.

  • When performing repairs around the HV battery, such as using a tap, do not allow metal shavings to enter the HV battery.
  • Do not touch any high voltage wire harnesses, connectors or parts with bare hands.
  • Hold the areas shown in the illustration and lift the HV battery.
  • Do not allow foreign matter, such as grease or oil, to adhere to the bolts or nuts of the HV battery.
  • Do not put your hands into the openings of the HV battery.

    *a

    Opening
  • When removing/installing/moving the HV battery assembly, make sure not to tilt it more than 80°.
  • Do not climb on top of or stand on the HV battery.
  • Do not allow any foreign matter or water to enter the HV battery.
  • If any bolts, nuts or clips are dropped into the HV battery, make sure to remove them.
  • After the power switch is turned off, the radio and display receiver assembly records various types of memory and settings. As a result, after turning the power switch off, make sure to wait at least 85 seconds before disconnecting the cable from the negative (-) auxiliary battery terminal. (for Audio and Visual System (for HV Model))

HINT:

When disposing of an HV battery, make sure to return it through an authorized collection agent who is capable of handling it safely. If the HV battery is returned via the manufacturer specified route, it will be returned properly and in a safe manner by an authorized collection agent.

PROCEDURE

1. PRECAUTION

Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

2. REMOVE SERVICE PLUG GRIP

Click here 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; HYBRID / BATTERY CONTROL: SERVICE PLUG GRIP: REMOVAL 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: SERVICE PLUG GRIP: REMOVAL

3. DISCONNECT ENGINE WIRE

Click here 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; HYBRID / BATTERY CONTROL: FRAME WIRE: REMOVAL+ 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: FRAME WIRE: REMOVAL+

4. REMOVE CONNECTOR COVER ASSEMBLY

Click here 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; HYBRID / BATTERY CONTROL: INVERTER WITH CONVERTER: REMOVAL+ 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: INVERTER WITH CONVERTER: REMOVAL+

5. CHECK TERMINAL VOLTAGE

Click here 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; HYBRID / BATTERY CONTROL: INVERTER WITH CONVERTER: REMOVAL+ 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: INVERTER WITH CONVERTER: REMOVAL+

6. INSTALL CONNECTOR COVER ASSEMBLY

CAUTION:

Be sure to wear insulated gloves.

(a) 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}

NOTICE:

  • Do not touch the connector cover assembly waterproof seal.
  • Do not allow any foreign matter or water to enter the inverter with converter assembly.

*a

Bolt (A)

*b

Bolt (B)

(b) Install the bolt (B).

Torque:

8.0 N·m {82 kgf·cm, 71 in·lbf}

7. CONNECT ENGINE WIRE

Click here 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; HYBRID / BATTERY CONTROL: FRAME WIRE: INSTALLATION+ 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: FRAME WIRE: INSTALLATION+

8. DISCONNECT REAR SEAT CENTER LAP TYPE BELT ASSEMBLY

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; SEAT: REAR SEAT ASSEMBLY: REMOVAL+

9. REMOVE REAR SEAT CUSHION ASSEMBLY

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; SEAT: REAR SEAT ASSEMBLY: REMOVAL+

10. REMOVE REAR SEAT CUSHION LOCK HOOK

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; SEAT: REAR SEAT ASSEMBLY: REMOVAL+

11. REMOVE REAR DOOR SCUFF PLATE LH

Click here 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; INTERIOR PANELS / TRIM: ROOF HEADLINING (for Sedan): REMOVAL+ 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 04/2020]; INTERIOR PANELS / TRIM: ROOF HEADLINING (for Sedan): REMOVAL+ 2021 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [04/2020 - 09/2022]; INTERIOR PANELS / TRIM: ROOF HEADLINING (for Sedan): REMOVAL+

12. REMOVE REAR UNDER SIDE COVER LH

Click here 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; INTERIOR PANELS / TRIM: ROOF HEADLINING (for Sedan): REMOVAL+ 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 04/2020]; INTERIOR PANELS / TRIM: ROOF HEADLINING (for Sedan): REMOVAL+ 2021 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [04/2020 - 09/2022]; INTERIOR PANELS / TRIM: ROOF HEADLINING (for Sedan): REMOVAL+

13. REMOVE REAR DOOR SCUFF PLATE RH

HINT:

Use the same procedure as for the LH side.

14. REMOVE REAR UNDER SIDE COVER RH

HINT:

Use the same procedure as for the LH side.

15. REMOVE REAR UNDER COVER

(a) Disengage the 2 clips.

(b) Disengage the 2 guides to remove the rear under cover from the rear seat cushion leg sub-assembly.

16. REMOVE REAR SEAT CUSHION LEG SUB-ASSEMBLY

(a) Remove the 6 bolts and rear seat cushion leg sub-assembly.

17. REMOVE BATTERY COOLING BLOWER ASSEMBLY

Click here 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; HYBRID / BATTERY CONTROL: BATTERY BLOWER: REMOVAL+ 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: BATTERY BLOWER: REMOVAL+

18. REMOVE NO. 1 HV BATTERY COVER PANEL RH

CAUTION:

Be sure to wear insulated gloves.

(a) Using the service plug grip, remove the battery cover lock striker.

HINT:

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

*1

Service Plug Grip

*2

Battery Cover Lock Striker

*a

Projection

*b

Turn

*c

Button

(b) Remove the 3 bolts, 2 nuts and No. 1 HV battery cover panel RH from the HV battery.

19. DISCONNECT FLOOR UNDER WIRE

CAUTION:

Be sure to wear insulated gloves.

(a) Disconnect the 2 HV battery junction block assembly connectors.

NOTICE:

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

*a

Shield Ground

(b) Disconnect the shield ground from the HV battery.

20. DISCONNECT FLOOR WIRE

CAUTION:

Be sure to wear insulated gloves.

(a) Disengage the clamp.

(b) Disconnect the electric vehicle battery plug assembly connector.

(c) Disconnect the HV battery junction block assembly connector.

21. REMOVE NO. 1 HYBRID BATTERY EXHAUST DUCT

(a) Remove the clip.

(b) Disengage the claw to remove the No. 1 hybrid battery exhaust duct from the HV battery.

22. DISCONNECT FLOOR WIRE

CAUTION:

Be sure to wear insulated gloves.

(a) Disengage the clamp.

(b) Disconnect the battery voltage sensor connector.

23. REMOVE HV BATTERY

CAUTION:

Be sure to wear insulated gloves.

(a) Remove the 5 bolts and HV battery from the vehicle.

NOTICE:

  • 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.

24. REMOVE UPPER NO. 1 HYBRID BATTERY COVER SUB-ASSEMBLY

CAUTION:

Be sure to wear insulated gloves and protective goggles.

(a) Remove the 6 bolts, 5 nuts and upper No. 1 hybrid battery cover sub-assembly from the HV battery.

25. REMOVE NO. 1 HV BATTERY SHIELD PANEL

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: BATTERY VOLTAGE SENSOR (for NICKEL METAL HYDRIDE BATTERY): REMOVAL+

26. REMOVE BATTERY VOLTAGE SENSOR

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: BATTERY VOLTAGE SENSOR (for NICKEL METAL HYDRIDE BATTERY): REMOVAL+

27. REMOVE HYBRID BATTERY TERMINAL BLOCK

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: FUSE BOX (for NICKEL METAL HYDRIDE BATTERY): REMOVAL+

28. REMOVE HV BATTERY JUNCTION BLOCK ASSEMBLY

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HV RELAY ASSEMBLY (for NICKEL METAL HYDRIDE BATTERY): REMOVAL+

29. REMOVE NO. 1 HYBRID BATTERY SHIELD SUB-ASSEMBLY

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HV BATTERY THERMISTOR (for NICKEL METAL HYDRIDE BATTERY): REMOVAL+

30. REMOVE NO. 1 HYBRID BATTERY INTAKE DUCT

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HV BATTERY THERMISTOR (for NICKEL METAL HYDRIDE BATTERY): REMOVAL+