Last Modified: 12-11-2024 6.11:8.1.0 Doc ID: RM100000002OT8A
Model Year Start: 2025 Model: GR Corolla Prod Date Range: [09/2024 -           ]
Title: UC80F (AUTOMATIC TRANSMISSION / TRANSAXLE): DIFFERENTIAL OIL SEAL (for RH Side): REPLACEMENT; 2025 MY Corolla Corolla Hatchback GR Corolla [09/2024 -        ]

REPLACEMENT

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during front drive shaft oil seal RH and front transaxle case oil seal removal/installation are shown below.

Necessary Procedure After Parts Removed/Installed/Replaced

Replaced Part or Performed Procedure

Necessary Procedure

Effect/Inoperative Function when Necessary Procedure not Performed

Link
*1:w/ Steering Lock Function

*2: Not necessary when ECM replaced with new one.

*3: If transaxle compensation code read from ECM

*4: If transaxle compensation code not read from ECM

Replacement of ECM

Vehicle Identification Number (VIN) registration

MIL comes on

2023 - 2025 MY GR Corolla [09/2022 -        ]; G16E-GTS (ENGINE CONTROL): SFI SYSTEM: REGISTRATION

ECU configuration

-

2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; SETUP: WHEN REPLACING OR REMOVING/INSTALLING PARTS: ECU CONFIGURATION

Update ECU security key

Vehicle Control History (RoB) are stored

2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; SETUP: WHEN REPLACING OR REMOVING/INSTALLING PARTS: UPDATE ECU SECURITY KEY

Heavy Knock History

-

2023 - 2025 MY GR Corolla [09/2022 -        ]; G16E-GTS (ENGINE CONTROL): SFI SYSTEM: REGISTRATION

ECU communication ID registration (Immobiliser system)

Engine start function

2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

Code registration (Smart Key System (for Gasoline Model, Start Function))
  • Wireless Door Lock Control System (for Gasoline Model with Smart Key System)
  • Smart Key System (for Gasoline Model, Entry Function)
  • Smart Key System (for Gasoline Model, Start Function)
  • Steering lock function*1

2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

  • Perform reset memory*2
  • Transfer transaxle compensation code*3
  • Reset transaxle compensation code*4
  • Perform road test to allow ECM to learn
  • Large shift shock
  • Deterioration of fuel efficiency

Initialization: 2025 MY Corolla Corolla Hatchback GR Corolla [09/2024 -        ]; UC80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: INITIALIZATION

Registration: 2025 MY Corolla Corolla Hatchback GR Corolla [09/2024 -        ]; UC80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: REGISTRATION

  • Replacement of engine assembly
  • Gas leaks from exhaust system is repaired

Inspection after repair
  • Poor idle, etc.
  • Engine start function, etc.

2023 - 2025 MY GR Corolla [09/2022 -        ]; G16E-GTS (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

Automatic transaxle assembly
  • Perform reset memory
  • Input transaxle compensation code into ECM
  • Perform road test to allow ECM to learn
  • Large shift shock
  • Deterioration of fuel efficiency

Initialization: 2025 MY Corolla Corolla Hatchback GR Corolla [09/2024 -        ]; UC80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: INITIALIZATION

Registration: 2025 MY Corolla Corolla Hatchback GR Corolla [09/2024 -        ]; UC80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: REGISTRATION

Automatic transaxle fluid

ATF thermal degradation estimate reset

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

2025 MY Corolla Corolla Hatchback GR Corolla [09/2024 -        ]; UC80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: INITIALIZATION

Front wheel alignment adjustment
  • Perform "Reset Memory"
  • Perform "Calibration"
  • VSC is disabled or malfunctions
  • DTCs are output
  • Slip indicator light illuminates
  • ABS warning light illuminates

2025 MY Corolla Corolla Hatchback GR Corolla [09/2024 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System TMC Made): UTILITY

Tire

ECU Data Initialization (When performing tire replacement after RoB code X2104 is output)

Active Torque Split AWD System

2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 -        ]; GF1A (TRANSFER / 4WD / AWD): ACTIVE TORQUE SPLIT AWD SYSTEM: CALIBRATION

CAUTION:

  • The engine assembly with transaxle is very heavy. Be sure to follow the procedure described in the repair manual, or the engine lifter may suddenly drop or the engine assembly with transaxle may fall off the engine lifter.

    *a

    An Object Exceeding Weight Limit of Engine Lifter
  • To prevent burns, do not touch the engine, exhaust manifold or other high temperature components while the engine is hot.
  • The automatic transaxle assembly is very heavy. Be sure to follow the procedure described in the repair manual, or the transmission jack may suddenly drop.

    *a

    An Object Exceeding Weight Limit of Transmission Jack

NOTICE:

If automatic transaxle assembly parts are replaced, refer to Parts Replacement Compensation Table to determine if any additional operations are necessary.

Click here 2025 MY Corolla Corolla Hatchback GR Corolla [09/2024 -        ]; UC80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: PRECAUTION

HINT:

When the cable is disconnected / reconnected to the auxiliary battery terminal, systems temporarily stop operating. However, each system has a function that completes learning the first time the system is used.

  • Learning completes when vehicle is driven

    Effect/Inoperative Function When Necessary Procedures are not Performed

    Necessary Procedures

    Link

    Front Camera System

    Drive the vehicle straight ahead at 35 km/h (22 mph) or more for 5 seconds or more.

    2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; ADVANCED DRIVER ASSISTANCE SYSTEM: FRONT CAMERA SYSTEM: INITIALIZATION

  • Learning completes when vehicle is operated normally

    Effect/Inoperative Function When Necessary Procedures are not Performed

    Necessary Procedures

    Link

    Power door lock control system

    • Back door opener

    Perform door unlock operation with door control switch or electrical key transmitter sub-assembly switch.

    2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: INITIALIZATION

PROCEDURE

1. PRECAUTION

NOTICE:

If automatic transaxle assembly parts are replaced, refer to Parts Replacement Compensation Table to determine if any additional operations are necessary.

Click here 2025 MY Corolla Corolla Hatchback GR Corolla [09/2024 -        ]; UC80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: PRECAUTION

2. REMOVE TRANSFER ASSEMBLY

Click here 2025 MY Corolla Corolla Hatchback GR Corolla [09/2024 -        ]; GF1A (TRANSFER / 4WD / AWD): TRANSFER ASSEMBLY: REMOVAL

3. REMOVE FRONT TRANSAXLE CASE OIL SEAL

(a) Using a screwdriver with its tip wrapped with protective tape, remove the front transaxle case oil seal from the transaxle housing.

NOTICE:

Do not damage the front differential case or transaxle housing.

*a

Protective Tape

4. REMOVE FRONT DRIVE SHAFT OIL SEAL RH

(a) Using SST, remove the front drive shaft oil seal RH from the front differential case.

SST: 09308-00010

NOTICE:

Do not damage the front differential case.

5. INSTALL FRONT DRIVE SHAFT OIL SEAL RH

(a) Coat the lip of a new front drive shaft oil seal RH with MP grease.

(b) Using SST and a hammer, install the front drive shaft oil seal RH to the front differential case.

SST: 09950-60011

09951-00410

SST: 09950-70010

09951-07200

Standard Depth:

21.5 to 22.5 mm (0.846 to 0.886 in.)

NOTICE:

  • Make sure to install the front drive shaft oil seal RH as specified, otherwise malfunctions such as a fluid leak will occur.
  • Do not damage the lip of the front drive shaft oil seal RH.

*a

Depth

6. INSTALL FRONT TRANSAXLE CASE OIL SEAL

(a) Coat the lip of a new front transaxle case oil seal with MP grease.

(b) Using SST and a hammer, install the front transaxle case oil seal to the transaxle housing.

SST: 09649-17010

SST: 09950-70010

09951-07200

Standard Depth:

5.5 to 6.5 mm (0.217 to 0.256 in.)

NOTICE:

  • Be sure to install the front transaxle case oil seal in the correct direction.
  • Make sure to install the front transaxle case oil seal as specified, otherwise malfunctions such as a fluid leak will occur.
  • Do not damage the lip of the front transaxle case oil seal.

*a

Depth

7. INSTALL TRANSFER ASSEMBLY

Click here 2025 MY Corolla Corolla Hatchback GR Corolla [09/2024 -        ]; GF1A (TRANSFER / 4WD / AWD): TRANSFER ASSEMBLY: INSTALLATION