Caution / Notice / Hint

WARNING: This page is about a different car, the 2024 Lexus ES 250, 2023 Lexus ES 250, 2022 Lexus ES 250, and 2021 Lexus ES 250. 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 and installed, or replaced during engine unit 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 Tracing Assist System	Refer to INITIALIZATION [08/2021 - ]
		Pre-collision System
		Parking Support Brake System (for Gasoline Model)*
		Lighting System (for Gasoline Model)
	Memorize steering angle neutral point	Parking Assist Monitor System (for Gasoline Model)	Refer to INITIALIZATION [06/2018 - 09/2022]
	Memorize steering angle neutral point	Panoramic View Monitor System (for Gasoline Model)	Refer to INITIALIZATION [06/2018 - 09/2022]
	Initialize power trunk lid system	Power Trunk Lid System (for Gasoline Model)	Refer to INITIALIZATION [06/2018 - ]
Replacement of ECM	Vehicle Identification Number (VIN) registration	MIL comes on	Refer to REGISTRATION [08/2020 - ]
Replacement of ECM	ECU communication ID registration (Immobiliser system)	Engine start function	Refer to REGISTRATION [08/2020 - 09/2022]
Replacement of engine assembly Gas leak from exhaust system is repaired Replacement of throttle body with motor assembly Cleaning the deposits from the throttle body with motor assembly Replacement of cam timing control motor with EDU assembly Removal and installation of a cam timing control motor with EDU assembly Replacement of camshaft timing gear assembly Removal and installation of a camshaft timing gear assembly Replacement of cylinder head sub-assembly Replacement of camshaft (for intake or exhaust camshaft) Replacement of camshaft timing exhaust gear assembly Replacement of port fuel injector assembly Replacement of direct fuel injector assembly Replacement of fuel pump assembly (for high pressure side) Replacement of engine coolant temperature sensor Replacement of spark plug Replacement of ignition coil assembly Replacement of EGR valve assembly Replacement of knock control sensor	Inspection after repair	Poor idle, etc. Engine start function, etc.	Refer to INITIALIZATION [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*1 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*1 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. (The vehicle height changes because of suspension or tire replacement.)	Rear television camera assembly optical axis adjustment (Back camera position setting)	Parking Assist Monitor System (for Gasoline Model)	Refer to INITIALIZATION [06/2018 - 09/2022] for Initialization Refer to CALIBRATION [06/2018 - 09/2022] for Calibration
Replacement of front bumper assembly	Front television camera view adjustment	Panoramic View Monitor System (for Gasoline Model)	Refer to INITIALIZATION [06/2018 - 09/2022] for Initialization Refer to CALIBRATION [06/2018 - 09/2022] for Calibration
Suspension, tires, etc. (The vehicle height changes because of suspension or tire replacement.)	Parking assist ECU initialization Adjust steering angle Rear television camera assembly optical axis (Back camera position setting)	Panoramic View Monitor System (for Gasoline Model)
Replacement of ECM	Code registration (Smart access system with push-button start (for Start Function, Gasoline Model)	Wireless Door Lock Control System Smart Access System with Push-button Start (for Entry Function, Gasoline Model) Smart Access System with Push-button Start (for Start Function, Gasoline Model) Steering lock function	Refer to REGISTRATION [08/2020 - 09/2022]
Suspension, tires, etc. (The vehicle height changes because of suspension or tire replacement.)	Perform headlight ECU sub-assembly LH initialization*2	Lighting System (for Gasoline Model)	Refer to INITIALIZATION [08/2021 - ]
Front wheel alignment adjustment	Perform "Reset Memory". Perform acceleration sensor zero point calibration and store system information memorization.	VSC disabled or malfunctioning DTCs are output Slip indicator light illuminated ABS warning light illuminated	Refer to UTILITY [06/2018 - ]

*: When performing learning using the Techstream.

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

*2: for LED Type Turn Signal Light

NOTE:

After the engine switch is turned off, the radio receiver assembly records various types of memory and settings. As a result, after turning the engine switch off, make sure to wait at least 85 seconds before disconnecting the cable from the negative (-) battery terminal. (for Audio and Visual System)
After the engine switch is turned off, the radio receiver assembly records various types of memory and settings. As a result, after turning the engine switch off, make sure to wait at least 85 seconds before disconnecting the cable from the negative (-) battery terminal. (for Navigation System)
This procedure includes the removal of small-head bolts. Refer to Small-Head Bolts of Basic Repair Hint to identify the small-head bolts.
Refer to PRECAUTION [06/2018 - ]