Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GCQ5
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 04/2020]
Title: HYBRID / BATTERY CONTROL: FRAME WIRE: REMOVAL; 2020 MY Corolla Corolla HV [01/2019 - 04/2020]

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 floor under wire 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

Front wheel alignment adjustment
  1. Clear zero point calibration data.
  2. Perform yaw rate and acceleration sensor zero point calibration.
  • DTCs are stored
  • ABS warning light illuminates
  • Brake warning light / yellow (minor malfunction) illuminates
  • Slip indicator light illuminates
  • VSC disabled or malfunctions

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): CALIBRATION

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))

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

3. DISCONNECT ENGINE WIRE

CAUTION:

Be sure to wear insulated gloves.

NOTICE:

Do not allow any foreign matter or water to enter the inverter with converter assembly.

(a) Move each lock lever as shown in the illustration and disconnect the 2 inverter with converter assembly connectors.

NOTICE:

  • Do not touch the waterproof seal or terminals of the connector.
  • Do not damage the terminals, connector housing or inverter with converter assembly during disconnection.
  • Cover the hole where the cable was connected with tape (non-residue type) or equivalent to prevent entry of foreign matter.
  • Insulate the disconnected terminals with insulating tape.

(b) Remove the bolt.

(c) Disengage the clamp and disconnect the engine wire.

4. REMOVE CONNECTOR COVER ASSEMBLY

Click here 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; 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+

6. TEMPORARILY INSTALL CONNECTOR COVER ASSEMBLY

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

7. DISCONNECT HV FLOOR UNDER WIRE

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

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+

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+

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

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 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+

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 HV FLOOR UNDER WIRE

CAUTION:

Be sure to wear insulated gloves.

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

NOTICE:

Insulate the disconnected connectors with insulating tape.

*a

Shield Ground

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

19. REMOVE REAR FLOOR SIDE MEMBER COVER RH (w/ Cover)

Click here 2020 - 2021 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2020]; REAR SUSPENSION: REAR STABILIZER BAR (for Sedan): REMOVAL+

20. REMOVE FRONT FLOOR COVER RH

HINT:

Perform the same procedure as for the front floor cover LH.

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; 2ZR-FXE (INTAKE / EXHAUST): EXHAUST MANIFOLD: REMOVAL+

21. REMOVE FRONT SUSPENSION CROSSMEMBER SUB-ASSEMBLY

Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022]; FRONT SUSPENSION: FRONT SUSPENSION MEMBER: REMOVAL

22. REMOVE HV FLOOR UNDER WIRE

CAUTION:

Be sure to wear insulated gloves.

NOTICE:

Insulate the disconnected connectors with insulating tape.

(a) Remove the 2 nuts.

(b) Remove the 3 clamps.

NOTICE:

If the clamps are removed forcibly, the stud bolts may be damaged.

(c) Disengage the grommet and pull out the HV floor under wire from the floor panel hole.

(d) Remove the clamp (A).

(e) Disengage the clamp (B) to remove the HV floor under wire.