Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000002B9WW
Model Year Start: 2023 Model: Corolla Hatchback Prod Date Range: [03/2023 -           ]
Title: K120 / K121 (CVT): REVOLUTION SENSOR (NC1 SENSOR): REMOVAL; 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 -        ]

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed, installed, or replaced during transmission revolution sensor (NC1) removal/installation are shown below.

Necessary Procedure After Parts Removed/Installed/Replaced

Replacement Part or Procedure

Necessary Procedure

Effect/Inoperative when not Performed

Link

Replacement of CVT fluid

ATF thermal degradation estimate reset

The value of the Data List item "ATF Thermal Degradation Estimate" is not estimated correctly

for K120: 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION

for K121: 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 -        ]; K120 / K121 (CVT): K121 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION

Replacement of transmission valve body assembly

for K120

  • Reset transaxle compensation code
  • Perform reset memory
  • CVT oil pressure calibration
  • Perform road test to allow TCM to learn
  • Large shift shock
  • Deterioration of fuel efficiency

Initialization: 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION

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

for K121

  • Reset transaxle compensation code
  • Perform reset memory
  • CVT oil pressure calibration
  • Perform road test to allow ECM to learn
  • Large shift shock
  • Deterioration of fuel efficiency

Initialization: 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 -        ]; K120 / K121 (CVT): K121 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION

Registration: 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 -        ]; K120 / K121 (CVT): K121 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: REGISTRATION

PROCEDURE

1. REMOVE TRANSMISSION VALVE BODY ASSEMBLY

  • for K120:

    Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; K120 / K121 (CVT): K120 VALVE BODY ASSEMBLY: REMOVAL

  • for K121:

    Click here 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 -        ]; K120 / K121 (CVT): K121 VALVE BODY ASSEMBLY: REMOVAL

2. REMOVE TRANSMISSION REVOLUTION SENSOR (NC1)

(a) Disconnect the transmission revolution sensor (NC1) connector.

(b) Remove the bolt and transmission revolution sensor (NC1) from the transaxle case sub-assembly.