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Home >> Toyota >> 2020 >> Corolla L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 211 (Automatic Transaxle System (K120 / K121) - Service Information (2 Of 5)) >> Continuously Variable Transaxle Assembly >> Removal [11/2022 - 03/2023] >> Caution / Notice / Hint

Caution / Notice / Hint

WARNING: This page is about a different variant/trim than selected.

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during continuously variable transaxle 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 ECM Vehicle Identification Number (VIN) registration MIL comes on Refer to REGISTRATION [06/2018 - ]
Update ECU security key Vehicle Control History (RoB) are stored Refer to UPDATE ECU SECURITY KEY [09/2022 - ]
ECU communication ID registration (Immobiliser system) Engine start function Refer to REGISTRATION [11/2022 - ]
  • Perform reset memory
  • CVT oil pressure calibration
  • Perform road test to allow TCM to learn
  • Large shift shock
  • Deterioration of fuel efficiency
Refer to INITIALIZATION [11/2022 - 09/2024] for Initialization
Refer to REGISTRATION [06/2018 - 09/2024] for Registration
Replacement of ECM*2 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*4
Refer to REGISTRATION [11/2022 - ]
Replacement of ECM*1 Code registration (Immobiliser system)
  • Engine start
  • Telematics System
Refer to REGISTRATION [11/2022 - ]
  • Replacement of engine assembly
  • Gas leak from exhaust system is repaired
Inspection after repair
  • Poor idle, etc.
  • Engine start function, etc.
Refer to INITIALIZATION [11/2022 - ]
Replacement of continuously variable transaxle assembly
  • Input transaxle compensation code into TCM
  • Perform reset memory
  • CVT oil pressure calibration
  • Perform road test to allow TCM to learn
  • Large shift shock
  • Deterioration of fuel efficiency
Refer to INITIALIZATION [11/2022 - 09/2024] for Initialization
Refer to REGISTRATION [06/2018 - 09/2024] for Registration
Replacement of TCM
(If transaxle compensation code read from TCM)
Update ECU security key Vehicle Control History (RoB) are stored Refer to UPDATE ECU SECURITY KEY [09/2022 - ]
  • Transfer transaxle compensation code
  • Perform reset memory*3
  • CVT oil pressure calibration
  • Perform road test to allow TCM to learn
  • Large shift shock
  • Deterioration of fuel efficiency
Refer to INITIALIZATION [11/2022 - 09/2024] for Initialization
Refer to REGISTRATION [06/2018 - 09/2024] for Registration
Replacement of TCM
(If transaxle compensation code not read from TCM)
Update ECU security key Vehicle Control History (RoB) are stored Refer to UPDATE ECU SECURITY KEY [09/2022 - ]
  • Reset transaxle compensation code
  • Perform reset memory*3
  • CVT oil pressure calibration
  • Perform road test to allow TCM to learn
  • Large shift shock
  • Deterioration of fuel efficiency
Refer to INITIALIZATION [11/2022 - 09/2024] for Initialization
Refer to REGISTRATION [06/2018 - 09/2024] for Registration
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
Refer to UTILITY [11/2022 - ] w/ Electric Parking Brake System
Refer to UTILITY [09/2022 - 09/2024] w/o Electric Parking Brake System
Replacement of CVT fluid ATF thermal degradation estimate reset The value of the Data List item "ATF Thermal Degradation Estimate" is not estimated correctly Refer to INITIALIZATION [11/2022 - 09/2024]

*1: w/o Smart Key System

*2: w/ Smart Key System

*3: Not necessary when TCM replaced with new one.

*4: w/ Steering Lock Function

WARNING:
  • To prevent burns, do not touch the engine, exhaust pipe or other high temperature components while the engine is hot.
    GTY563662Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  • Because the continuously variable transaxle assembly is extremely heavy, make sure to follow the work procedures described in the repair information.
    GTY559497Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Heavy object exceeding the capacity of the transmission jack
  • If work is not performed according to the procedures described in the repair information, there is a danger that the transmission jack could drop and components could fall down.

HINT: 

When the cable is disconnected / reconnected to the 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 Procedure not Performed Necessary Procedure Link
Front Camera System Drive the vehicle straight ahead at 15 km/h (9 mph) or more for 1 second or more. Refer to INITIALIZATION [11/2022 - ]
LEARNING COMPLETES WHEN VEHICLE IS OPERATED NORMALLY

Effect/Inoperative Function when Necessary Procedure not Performed Necessary Procedure Link
Power Door Lock Control System
  • Back door opener*1
Perform door unlock operation with door control switch or electrical key transmitter sub-assembly switch. Refer to INITIALIZATION [11/2022 - ]

*1: for Hatchback