Caution / Notice / Hint

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus UX 250h, 2023 Lexus UX 250h, 2022 Lexus UX 250h, 2021 Lexus UX 250h, and 2020 Lexus UX 250h. 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 the engine assembly 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
Disconnect cable from negative auxiliary battery terminal	Perform steering sensor zero point calibration	Lane Control System	Refer to INITIALIZATION [07/2022 - ]
		Parking Support Brake System*1
		Pre-collision system
		Lighting System (EXT)
	Initialize back door lock	Power door lock control system	Refer to INITIALIZATION [10/2018 - ]
	Reset back door close position	Power Back Door System	Refer to INITIALIZATION [07/2022 - ]
Replacement of engine assembly Air leaks from intake system is repaired Gas leaks from exhaust system is repaired	Inspection After Repair	Poor idle, etc. Engine start function, etc.	Refer to INITIALIZATION [08/2021 - ]
Inverter with converter assembly	Resolver learning	DTCs are stored Slight vibration at a vehicle speed of 5 km/h (3 mph) or less Shock or vibration during acceleration	Refer to UTILITY [10/2018 - ]
Hybrid vehicle transaxle assembly	Resolver learning Initialize resolver		Refer to UTILITY [10/2018 - ]
Front wheel alignment adjustment	Clear zero point calibration data Perform yaw rate and acceleration sensor zero point calibration	DTCs are stored ABS warning light illuminates Brake warning light / yellow (minor malfunction) illuminates Slip indicator light illuminates VSC disabled or malfunctions	Refer to CALIBRATION [10/2018 - ]
Suspension, tires, etc.*2	Rear television camera assembly optical axis (Back camera position setting)	Parking Assist Monitor System	Refer to CALIBRATION [07/2022 - ]
Suspension, tires, etc.*2	Perform headlight ECU sub-assembly LH initialization	Lighting System (EXT)	Refer to INITIALIZATION [10/2020 - ]

*1: When performing learning using the Techstream.*2: If the vehicle height has changed due to suspension or tire replacement

WARNING:

Because the weight of the engine with transaxle assembly is extremely heavy, make sure to follow the work procedures described in the service information.

Fig 1: Warning: Weight Of The Engine With Transmission Assembly Is Extremely Heavy

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Heavy object exceeding the capacity of the engine lifter

If work is not performed according to the procedures described in the service information, there is a danger that the engine lifter could drop and components could fall down.

Do not touch the engine or exhaust manifold converter sub-assembly when they are hot.

Fig 2: Warning: Do Not Touch Hot Exhaust Manifold Sub-Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a High temperature areas
Touching the engine or exhaust manifold converter sub-assembly when they are hot could result in burns.

Never perform work on fuel system components near any possible ignition sources.

Fig 3: Warning: Possible Ignition Sources
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Vaporized fuel could ignite, resulting in a serious accident.

Do not perform work on fuel system components without first disconnecting the cable from the negative (-) auxiliary battery terminal.

Fig 4: Warning: Disconnect Cable From Negative Battery Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Sparks could cause vaporized fuel to ignite, resulting in a serious accident.

NOTE:

This procedure includes the removal of small-head bolts. Refer to Small-Head Bolts of Basic Repair Hint to identify the small-head bolts.