K120 / K121 (CVT): REVOLUTION SENSOR (NC1 SENSOR): REMOVAL; 2023 - 2025 MY Corolla Corolla Hatchback [03/2023

Last Modified: 07-31-2024	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:

for K121:

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:

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:

Registration:

PROCEDURE

1. REMOVE TRANSMISSION VALVE BODY ASSEMBLY

for K120:
Click here
for K121:
Click here

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.