Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM100000001O2S0
Model Year Start: 2021 Model: Corolla Prod Date Range: [04/2020 - 09/2022]
Title: HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL; 2021 - 2022 MY Corolla Corolla HV [04/2020 - 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 hybrid vehicle control ECU 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 hybrid vehicle control ECU

Code registration (Smart Key System (for Start Function))
  • Wireless Door Lock Control System
  • Smart Key System (for Entry Function)
  • Smart Key System (for Start Function)
  • Steering lock function
  • Telematics System

2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION

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. DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; MAINTENANCE: 2ZR-FXE AUXILIARY BATTERY: REMOVAL+

2. REMOVE ECU INTEGRATION BOX RH

Click here 2019 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 09/2022]; NETWORKING: NETWORK GATEWAY ECU: REMOVAL

3. REMOVE HYBRID VEHICLE CONTROL ECU

(a) Disengage the 2 claws and remove the hybrid vehicle control ECU from the ECU integration box RH.

NOTICE:

  • If the ECU integration box RH is deformed or damaged, replace it.
  • Do not bend the 2 claws more than necessary.