Caution / Notice / Hint

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. 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 exhaust manifold assembly RH 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
Auxiliary battery terminal is disconnected/reconnected	Operate the multiplex network master switch assembly (retractable outer mirror switch) to extend and retract the outer rear view mirror assembly	Parking Support Brake System*	Refer to INITIALIZATION [09/2023 - ]
Replacement of engine assembly Replacement of EGR valve assembly Replacement of air fuel ratio sensor (sensor 1) Gas leak from exhaust system is repaired	Inspection After Repair	Poor idle, etc. Engine start function, etc.	Refer to INITIALIZATION [12/2023 - ]
Replacement of ECM	Perform Vehicle Identification Number (VIN) registration	DTC is output	Refer to REGISTRATION [12/2023 - ]
Replacement of ECM	Update ECU security key	Vehicle Control History (RoB) are stored	Refer to UPDATE ECU SECURITY KEY [09/2023 - ]
Replacement of hybrid motor control inverter assembly	ECU configuration	-	Refer to ECU CONFIGURATION [09/2023 - ]
Replacement of hybrid motor control inverter assembly	Front Resolver Correction value Registration Front Resolver Correction value Writing	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 [12/2023 - ]
Replacement of service plug grip	High voltage fuse accumulated load history reset	DTCs are stored	Refer to UTILITY [12/2023 - ]
Replacement of hybrid vehicle transaxle assembly	Front Resolver Correction value Writing	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 [12/2023 - ]
Suspension parts	Rear television camera assembly optical axis (Back camera position setting)	Parking Assist Monitor System	Refer to CALIBRATION [09/2023 - ]
	Parking assist ECU initialization	Panoramic View Monitor System	Refer to CALIBRATION [09/2023 - ]
	Parking assist ECU initialization	Advanced Park	Refer to CALIBRATION [09/2023 - ]
	w/ Automatic Headlight Beam Level Control System: Perform headlight ECU (headlight assembly LH) initialization	Lighting System (EXT)	Refer to INITIALIZATION [09/2023 - ]
Tires	Initialization12 Tire Position Identification12	Tire Pressure Warning System	Refer to Procedures Necessary When Replacing Parts (for Tire Pressure Warning System) table below Refer to WORK PROCEDURE [12/2023 - ]
	Rear television camera assembly optical axis (Back camera position setting)	Parking Assist Monitor System	Refer to CALIBRATION [09/2023 - ]
	Parking assist ECU initialization	Panoramic View Monitor System	Refer to CALIBRATION [09/2023 - ]
	Parking assist ECU initialization	Advanced Park	Refer to CALIBRATION [09/2023 - ]
Replacement of front bumper assembly*3	Front television camera view adjustment	Panoramic View Monitor System	Refer to CALIBRATION [09/2023 - ]
Replacement of front bumper assembly*3	Front television camera view adjustment	Advanced Park	Refer to CALIBRATION [09/2023 - ]
Front wheel alignment adjustment	Perform "Calibration"	DTCs are stored ABS warning light illuminates Brake system warning light (yellow indicator) illuminates Slip indicator light illuminates Electronically controlled brake system disabled or malfunctions	Refer to RESET MEMORY / CALIBRATION [09/2023 - ]

*: When "[Parking Support Brake System icon] System Stopped See Owner's Manual" is displayed on the multi-information display.*1: Also necessary after performing a tire rotation.*2: It is not necessary to perform this procedure if the tire pressure warning valve and transmitters are installed to the same location.*3: Even when not replacing the part, it is necessary to perform the specified necessary procedures after installation.

WARNING:

Orange wire harnesses and connectors indicate high-voltage circuits. To prevent electric shock, always follow the procedure described in the service information.

Fig 1: Charging System Precaution
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Refer to PRECAUTION [09/2023 - ]
To prevent electric shock, wear insulated gloves when working on wire harnesses and components of the high voltage system.

Fig 2: Wear Insulated Gloves
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.

Fig 3: 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.

Fig 4: Do Not Touch The Engine, Exhaust Manifold Or Other High Temperature Components While The Engine Is Hot
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NOTE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Refer to BEFORE DISCONNECTING BATTERY [09/2023 - ]
To prevent the key from being locked in the vehicle, make sure to enter e-latch inspection mode and enable the manual release handle before disconnecting the cable from the negative (-) auxiliary battery terminal.
Refer to INSPECTION MODE PROCEDURE [09/2023 - ]
When disconnecting a wire harness of any component connected to the supply power of the integrated capacitor (integration control supply) or when removing the integrated capacitor (integration control supply), make sure to wait 5 minutes or more after turning the ignition switch off for self-diagnosis to complete and the voltage of the integrated capacitor (integration control supply) to discharge.

HINT:

When the cable is disconnected / reconnected to the auxiliary 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 Procedures are not Performed	Necessary Procedures	Link
Lighting System (w/ Automatic Headlight Beam Level Control System)	Drive the vehicle straight ahead at 15 km/h (10 mph) or more for 1 second or more.	Refer to INITIALIZATION [09/2023 - ]
Front Camera System
Adaptive High Beam System

LEARNING COMPLETES WHEN VEHICLE IS OPERATED NORMALLY

Effect/Inoperative Function When Necessary Procedures are not Performed	Necessary Procedures	Link
Power Back Door System	Reset back door close position	Refer to INITIALIZATION [09/2023 - ]
Air Conditioning System	After the ignition switch is turned to ON, the servo motor standard position is recognized.	-

COMPONENTS (REMOVAL)

Fig 1: Exhaust Manifold (For Bank 1) Removal Components

Procedure		Part Name Code
1	ENGINE ASSEMBLY WITH TRANSAXLE	-	-	-	-
2	EGR VALVE ASSEMBLY	25620	-	-	-
3	AIR FUEL RATIO SENSOR (for Bank 1 Sensor 1)	89467C	See step 3	-	-
4	MANIFOLD STAY	17118	-	-	-
5	EXHAUST MANIFOLD ASSEMBLY RH	17140	See step 5	-	-
6	EXHAUST MANIFOLD TO HEAD GASKET	17173	-	-	-
7	STUD BOLT	-	See step 7	-	-

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Non-reusable part