Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000002B8P3
Model Year Start: 2023 Model: Corolla Hatchback Prod Date Range: [03/2023 -           ]
Title: K120 / K121 (CVT): K121 VALVE BODY ASSEMBLY: 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 valve body assembly 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

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

Replacement of transmission valve body assembly
  • 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

HINT:

Shift shock may increase after replacing the transmission valve body assembly. In this case, shift shock will reduce as the vehicle is driven.

PROCEDURE

1. REMOVE TRANSAXLE SIDE COVER SUB-ASSEMBLY

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

2. REMOVE TRANSMISSION VALVE BODY ASSEMBLY

(a) Disengage the clamp to disconnect the transmission wire from the solenoid lock plate.

(b) Disconnect the 8 solenoid valve connectors.

(c) Remove the bolt and temperature sensor clamp from the transmission valve body assembly.

(d) Disconnect the temperature sensor from the transmission valve body assembly.

(e) Remove the O-ring from the temperature sensor.

(f) Remove the 11 bolts and transmission valve body assembly from the transaxle case sub-assembly.

(g) Remove the front oil pump cover gasket from the transaxle case sub-assembly.

(h) Type A:

(1) Remove the 4 transaxle case gaskets from the transaxle case sub-assembly.

(i) Type B:

(1) Remove the 3 transaxle case gaskets from the transaxle case sub-assembly.