Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GCPO
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 09/2022]
Title: HYBRID / BATTERY CONTROL: BATTERY VOLTAGE SENSOR (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 battery voltage sensor 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

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:

  • 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))
  • The type of battery voltage sensor to be used varies depending on the vehicle model.
  • The type of battery voltage sensor can be confirmed by the color of the label.

    *a

    Black Label
  • If the wrong type of battery voltage sensor is installed, the power switch cannot be turned on (READY).
  • After installing the battery voltage sensor, perform the following to check that the power switch can be turned on (READY).
    • Turn the power switch on (READY).
    • Turn the power switch off and wait for 30 seconds or more.
    • Turn the power switch on (READY) again.

PROCEDURE

1. 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

2. 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+

3. 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+

4. 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+

5. INSTALL CONNECTOR COVER ASSEMBLY

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

6. 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+

7. 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+

8. REMOVE REAR SEAT CUSHION 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 LOCK HOOK

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

10. 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+

11. 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+

12. REMOVE REAR DOOR SCUFF PLATE RH

HINT:

Use the same procedure as for the LH side.

13. REMOVE REAR UNDER SIDE COVER RH

HINT:

Use the same procedure as for the LH side.

14. REMOVE REAR UNDER COVER

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

15. REMOVE REAR SEAT CUSHION LEG SUB-ASSEMBLY

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

16. 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+

17. REMOVE NO. 1 HV BATTERY COVER PANEL RH

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

18. DISCONNECT FLOOR UNDER WIRE

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

19. DISCONNECT FLOOR WIRE

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

20. REMOVE NO. 1 HYBRID BATTERY EXHAUST DUCT

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

21. DISCONNECT FLOOR WIRE

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

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

CAUTION:

Be sure to wear insulated gloves and protective goggles.

(a) Remove the 5 bolts.

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.
  • If the HV battery has been struck or dropped, replace it.

(b) Move the HV battery toward the front of the vehicle.

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

*a

Bolt

*b

Nut

23. REMOVE NO. 1 HV BATTERY SHIELD PANEL

CAUTION:

Be sure to wear insulated gloves and protective goggles.

(a) Disengage the clamp.

(b) Disconnect the battery voltage sensor connector.

(c) Remove the bolt and 2 nuts.

(d) Pull back the No. 2 hybrid battery shield sub-assembly and remove the No. 1 HV battery shield panel from the HV battery.

*1

No. 1 HV Battery Shield Panel

*2

No. 2 Hybrid Battery Shield Sub-assembly

Pull Back

HINT:

Pull back the No. 2 hybrid battery shield sub-assembly until it is separated from the 2 stud bolts of the No. 1 HV battery shield panel.

24. REMOVE BATTERY VOLTAGE SENSOR

CAUTION:

Be sure to wear insulated gloves and protective goggles.

(a) Disconnect the battery voltage sensor connector.

NOTICE:

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

(b) Remove the bolt and battery voltage sensor from the HV battery.

NOTICE:

If the battery voltage sensor has been struck or dropped, replace it.