Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001HZEA
Model Year Start: 2020 Model: Corolla Hatchback Prod Date Range: [03/2019 - 09/2022]
Title: K120 / K121 (CVT): K120 TCM: REMOVAL; 2020 - 2022 MY Corolla Corolla Hatchback [03/2019 - 09/2022]

REMOVAL

CAUTION / NOTICE / HINT

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

Necessary Procedure After Parts Removed/Installed/Replaced

Replacement Part or Procedure

Necessary Procedure

Effect/Inoperative when not Performed

Link
*1: Not necessary when TCM replaced with new one.

*2: for Hatchback

Disconnect cable from negative battery terminal

Perform steering sensor zero point calibration

Lane Control System (for Gasoline Model)

2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]; PRE-COLLISION: PRE-COLLISION SYSTEM (for Gasoline Model): INITIALIZATION

Pre-collision System (for Gasoline Model)

Lighting System (w/ AFS)(EXT)

Initialize back door lock*2

Power Door Lock Control System (for Hatchback, Gasoline Model)

2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]; DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM (for Hatchback, Gasoline Model): INITIALIZATION

Replacement of TCM

(If transaxle compensation code read from TCM)
  • Transfer transaxle compensation code
  • Perform reset memory*1
  • Deceleration sensor zero point calibration
  • CVT oil pressure calibration
  • Perform road test to allow TCM to learn
  • Large shift shock
  • Deterioration of fuel efficiency

2019 - 2022 MY Corolla Corolla Hatchback [06/2018 - 09/2022]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION for Initialization

2019 - 2025 MY Corolla Corolla Hatchback [06/2018 -        ]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: REGISTRATION for Registration

Replacement of TCM

(If transaxle compensation code not read from TCM)
  • Reset transaxle compensation code
  • Perform reset memory*1
  • Deceleration sensor zero point calibration
  • CVT oil pressure calibration
  • Perform road test to allow TCM to learn

NOTICE:

After the ignition switch is turned off, the radio and display receiver assembly records various types of memory and settings. As a result, after turning the ignition switch off, make sure to wait at least 85 seconds before disconnecting the cable from the negative (-) battery terminal. (for Navigation System and Audio and Visual System (for Gasoline Model))

PROCEDURE

1. PRECAUTION

NOTICE:

After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

Click here 2020 - 2022 MY Corolla Corolla Hatchback [03/2019 - 09/2022]; MAINTENANCE: M20A-FKS BATTERY: REMOVAL+

3. REMOVE NO. 1 ENGINE UNDER COVER ASSEMBLY

Click here 2020 MY Corolla Corolla Hatchback [03/2019 - 09/2019]; M20A-FKS (ENGINE MECHANICAL): ENGINE ASSEMBLY: REMOVAL+ 2020 - 2021 MY Corolla Corolla Hatchback [09/2019 - 06/2021]; M20A-FKS (ENGINE MECHANICAL): ENGINE ASSEMBLY: REMOVAL+ 2022 MY Corolla Corolla Hatchback [06/2021 - 09/2022]; M20A-FKS (ENGINE MECHANICAL): ENGINE ASSEMBLY: REMOVAL+

4. REMOVE REAR ENGINE UNDER COVER LH

Click here 2020 MY Corolla Corolla Hatchback [03/2019 - 09/2019]; M20A-FKS (ENGINE MECHANICAL): ENGINE ASSEMBLY: REMOVAL+ 2020 - 2021 MY Corolla Corolla Hatchback [09/2019 - 06/2021]; M20A-FKS (ENGINE MECHANICAL): ENGINE ASSEMBLY: REMOVAL+ 2022 MY Corolla Corolla Hatchback [06/2021 - 09/2022]; M20A-FKS (ENGINE MECHANICAL): ENGINE ASSEMBLY: REMOVAL+

5. REMOVE TCM

(a) Remove the bolt to disconnect the engine wire from the No. 2 transmission control ECU bracket.

(b) Disengage the claw, rotate the lever and disconnect the TCM connector.

Remove in this Direction

(c) Remove the 2 bolts and TCM from the continuously variable transaxle assembly.

6. REMOVE NO. 1 TRANSMISSION CONTROL ECU BRACKET

(a) Remove the 2 screws and No. 1 transmission control ECU bracket from the TCM.

7. REMOVE NO. 2 TRANSMISSION CONTROL ECU BRACKET

(a) Remove the 2 screws and No. 2 transmission control ECU bracket from the TCM.