Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001D0WS
Model Year Start: 2019 Model: Corolla Hatchback Prod Date Range: [06/2018 -           ]
Title: K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: REGISTRATION; 2019 - 2025 MY Corolla Corolla Hatchback [06/2018 -        ]

REGISTRATION

CAUTION / NOTICE / HINT

NOTICE:

  • When the continuously variable transaxle assembly is replaced, the transaxle compensation code must be registered to the TCM (Procedure 1).

    After the continuously variable transaxle assembly is installed, the Quick Response (QR) code label will be positioned where the code cannot be read. Therefore, before installing the continuously variable transaxle assembly, record the transaxle compensation code or register it using the Techstream.

  • When the TCM is replaced, the existing transaxle compensation code must be registered to the new TCM (Procedure 2).
  • Perform Reset Memory after replacing the continuously variable transaxle parts.

    Click here 2019 - 2022 MY Corolla Corolla Hatchback [06/2018 - 09/2022]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION 2023 MY Corolla Corolla Hatchback [09/2022 - 11/2022]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION

PROCEDURE

1. INPUT TRANSAXLE COMPENSATION CODE INTO TCM (Procedure 1)

NOTICE:

Transaxle compensation codes are unique, 60-digit alphanumeric values printed on a QR code label on the transaxle. If an incorrect transaxle compensation code is registered to the TCM, shift shock may occur.

(a) Record the transaxle compensation code specified on the QR code label.

*1

QR Code Label

*2

Transaxle Compensation Code

(b) Make sure the shift lever is in P or N.

(c) Connect the Techstream to the DLC3.

(d) Turn the engine switch on (IG).

NOTICE:

Do not start the engine.

(e) Turn the Techstream on.

(f) Enter the following menus: Powertrain / Transmission / Utility / A/T Code Registration.

Powertrain > Transmission > Utility

Tester Display

A/T Code Registration

(g) Select "Set Compensation Code".

(h) Register the transaxle compensation code.

(1) Select "Input".

(2) Manually input the transaxle compensation code. The code is a 60-digit alphanumeric value printed on the QR code label. After inputting the code, select "OK".

(i) Check that the transaxle compensation code displayed on the screen is correct by comparing it with the 60-digit alphanumeric value on the QR code label.

NOTICE:

If an incorrect transaxle compensation code is registered to the TCM, shift shock may occur.

(j) Select "NEXT" to register the transaxle compensation code to the TCM.

NOTICE:

  • If the registration process fails, the transaxle compensation code may be incorrect. Check the transaxle compensation code again.
  • If the attempted transaxle compensation code is correct, a problem with the wire harness or a bad connection with the DLC3 may cause registration failure. Check the wire harness and the DLC3 connection. If no problem is found, the TCM may be malfunctioning. Check the TCM and repeat this operation.

2. TRANSFER TRANSAXLE COMPENSATION CODE (Procedure 2)

NOTICE:

Transaxle compensation codes are unique, 60-digit alphanumeric values printed on a QR code label on the transaxle. If an incorrect transaxle compensation code is registered to the TCM, shift shock may occur.

HINT:

The following operation is available for use when the TCM that is being replaced can still transmit its registered transaxle compensation code to the Techstream.

(a) Read the transaxle compensation code.

(1) Make sure the shift lever is in P or N.

(2) Connect the Techstream to the DLC3.

(3) Turn the engine switch on (IG).

NOTICE:

Do not start the engine.

(4) Turn the Techstream on.

(5) Enter the following menus: Powertrain / Transmission / Utility / A/T Code Registration.

Powertrain > Transmission > Utility

Tester Display

A/T Code Registration

(6) Select "Read Compensation Code".

(7) Select "Save".

(8) Select "Save" or "Overwrite".

(9) Select "Exit".

NOTICE:

Do not use the code printed on the transaxle QR code label even if the transaxle compensation code cannot be read using the Techstream. The code printed on an in-service transaxle may not match its current characteristics. Replace the TCM with a new one and perform a road test to allow the TCM to learn the transaxle characteristics.

(10) Turn the engine switch off.

(b) Replace the TCM.

(c) Register the transaxle compensation code.

(1) Turn the engine switch on (IG).

NOTICE:

Do not start the engine.

(2) Turn the Techstream on.

(3) Enter the following menus: Powertrain / Transmission / Utility / A/T Code Registration.

Powertrain > Transmission > Utility

Tester Display

A/T Code Registration

(4) Select "Set Compensation Code".

(5) Select "Open".

(6) Select "Open" again to proceed.

(7) Select "Exit".