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 - ]
	for K121 ECU configuration	-	Refer to ECU CONFIGURATION [09/2022 - ]
	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 - ]
	for K120 Perform reset memory CVT oil pressure calibration Perform road test to allow TCM to learn	Large shift shock Deterioration of fuel efficiency	Initialization: Refer to INITIALIZATION [11/2022 - 09/2024] Registration: Refer to REGISTRATION [06/2018 - 09/2024]
	for K121 Transfer transaxle compensation code5 Reset transaxle compensation code6 CVT oil pressure calibration Perform road test to allow ECM to learn	Large shift shock Deterioration of fuel efficiency	Initialization: Refer to INITIALIZATION [03/2023 - ] Registration: Refer to REGISTRATION [03/2023 - ]
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	for K120 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	Initialization: Refer to INITIALIZATION [11/2022 - 09/2024] Registration: Refer to REGISTRATION [06/2018 - 09/2024]
Replacement of continuously variable transaxle assembly	for K121 Input transaxle compensation code into ECM Perform reset memory CVT oil pressure calibration Perform road test to allow ECM to learn	Large shift shock Deterioration of fuel efficiency	Initialization: Refer to INITIALIZATION [03/2023 - ] Registration: Refer to REGISTRATION [03/2023 - ]
for K120 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	Initialization: Refer to INITIALIZATION [11/2022 - 09/2024] Registration: Refer to REGISTRATION [06/2018 - 09/2024]
for K120 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	Initialization: Refer to INITIALIZATION [11/2022 - 09/2024] Registration: Refer to REGISTRATION [06/2018 - 09/2024]
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	for K120: Refer to INITIALIZATION [11/2022 - 09/2024] for K121: Refer to INITIALIZATION [03/2023 - ]

*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

*5: If transaxle compensation code read from ECM

*6: If transaxle compensation code not read from ECM

WARNING:

To prevent burns, do not touch the engine, exhaust pipe or other high temperature components while the engine is hot.

Courtesy 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.

Courtesy 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