Caution / Notice / Hint

WARNING: This page is about a different car, the 2021 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed, installed, or replaced during automatic transaxle assembly removal/installation are shown below.

NECESSARY PROCEDURES AFTER PARTS REMOVED/INSTALLED/REPLACED

Replaced Part or Performed Procedure	Necessary Procedure	Effect/Inoperative Function when Necessary Procedure not Performed	Link
Battery terminal is disconnected/reconnected	Perform steering sensor zero point calibration	Lane Departure Alert System (w/ Steering Control)	Refer to INITIALIZATION [04/2018 - 08/2021] , or refer to INITIALIZATION [08/2021 - ]
		Pre-collision System
		Intelligent Clearance Sonar System*1
		Lighting System (for HV Model with Cornering Light)
	Memorize steering angle neutral point	Parking Assist Monitor System	Refer to INITIALIZATION [04/2018 - ]
	Memorize steering angle neutral point	Panoramic View Monitor System	Refer to INITIALIZATION [04/2018 - ]
Replacement of engine assembly Gas leak from exhaust system is repaired	Inspection after repair	Poor idle, etc. Engine start function, etc.	Refer to INITIALIZATION [08/2020 - ]
Replacement of ECM	Vehicle Identification Number (VIN) registration	MIL comes on	Refer to REGISTRATION [08/2020 - ]
	ECU communication ID registration (Immobiliser system)	Engine start function	Refer to REGISTRATION [08/2020 - ]
	Code registration (Smart Key System (for Start Function, Gasoline Model))	Wireless Door Lock Control System Smart Key System (for Entry Function, Gasoline Model) Smart Key System (for Start Function, Gasoline Model) Steering lock function	Refer to REGISTRATION [08/2020 - ]
Replacement of 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	Refer to INITIALIZATION [08/2020 - ] for UB80F Initialization Refer to REGISTRATION [08/2020 - ] for UB80F Registration
Replacement of ECM (If transaxle compensation code read from ECM)	Perform reset memory*2 Transfer transaxle compensation code Perform road test to allow ECM to learn
Replacement of ECM (If transaxle compensation code not read from ECM)	Perform reset memory*2 Reset transaxle compensation code Perform road test to allow ECM to learn
Replacement of automatic transaxle fluid	ATF thermal degradation estimate reset	The value of the Data List item "ATF Thermal Degradation Estimate" is not estimated correctly	Refer to INITIALIZATION [08/2020 - ]
Suspension, tires, etc.*3 (The vehicle height changes because of suspension or tire replacement)	Measure ultrasonic sensor detection angle Ultrasonic sensor detection angle registration	Intelligent Clearance Sonar System Intuitive Parking Assist System	Refer to CALIBRATION [04/2018 - ]
	Rear television camera assembly optical axis adjustment (Back camera position setting)	Parking Assist Monitor System	Refer to INITIALIZATION [04/2018 - ] for Initialization Refer to CALIBRATION [04/2018 - ] for Calibration
Replacement of front bumper assembly	Front television camera view adjustment	Panoramic View Monitor System	Refer to INITIALIZATION [04/2018 - ] for Initialization Refer to CALIBRATION [04/2018 - ] for Calibration
Suspension, tires, etc.*3 (The vehicle height changes because of suspension or tire replacement)	Parking assist ECU initialization Adjust steering angle Television camera assembly optical axis adjustment (Back camera position setting)	Panoramic View Monitor System
Front wheel alignment adjustment	Perform system variant learning and acceleration sensor zero point calibration.	VSC is disabled or malfunctions DTCs are output Slip indicator light illuminates ABS warning light illuminates	Refer to CALIBRATION [04/2018 - 08/2021] , or refer to CALIBRATION [08/2021 - ]

*1: When performing learning using the Techstream.*2: Not necessary when ECM replaced with new one.*3: If the vehicle height has changed due to suspension or tire replacement.

WARNING:

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*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 service information, or the transmission jack may suddenly drop.

*a	An Object Exceeding Weight Limit of Transmission Jack