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 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
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 throttle body with motor assembly Cleaning the deposits from the throttle body with motor assembly Replacement of camshaft (for intake or exhaust camshaft) Replacement of camshaft timing gear assembly Replacement of camshaft timing exhaust gear assembly Replacement of fuel (engine room side) pump assembly (for high pressure side) Replacement of ignition coil assembly Replacement of EGR valve assembly Gas leak from exhaust system is repaired Replacement of engine assembly Replacement of cylinder head sub-assembly Replacement of direct fuel injector assembly Replacement of engine coolant temperature sensor Replacement of spark plug Replacement of knock control sensor	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.

NOTE:

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 - ]

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: Engine Unit Removal Components (1 Of 16)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
1	DRIVE SHAFT BEARING BRACKET	43457	-	-	-
2	ENGINE OIL LEVEL DIPSTICK GUIDE	11452	-	-	-
3	V-RIBBED BELT	16361A	See step 3	-	-
4	COMPRESSOR WITH MOTOR ASSEMBLY	88370	See step 4	-	-
5	HV WATER PUMP BRACKET	G9141F	-	-	-
6	NO. 1 COMPRESSOR MOUNTING BRACKET	88431	-	-	-
7	NO. 4 CYLINDER BLOCK INSULATOR	12584	-	-	-
8	NO. 5 CYLINDER BLOCK INSULATOR	12585	-	-	-

*1	ENGINE OIL LEVEL DIPSTICK	*2	BRACKET
•	Non-reusable part	-	-

Fig 2: Engine Unit Removal Components (2 Of 16)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
9	DISCONNECT WATER BY-PASS HOSE	16261	-	-	-
10	NO. 2 WATER BY-PASS HOSE	16264	-	-	-
11	THROTTLE BODY WITH MOTOR ASSEMBLY	22030	See step 11	-	-
12	THROTTLE BODY GASKET	22271	-	-	-
13	NO. 2 WATER BY-PASS PIPE	16278	-	-	-
14	REMOVE WATER BY-PASS HOSE	16261	-	-	-
15	VENTILATION HOSE	12261	-	-	-
16	WATER BY-PASS HOSE SUB-ASSEMBLY	-	-	-	-
17	NO. 2 SURGE TANK STAY	17126	-	-	-
18	INTAKE AIR SURGE TANK ASSEMBLY	17190	See step 18	-	-
19	AIR SURGE TANK TO INTAKE MANIFOLD GASKET	17176	-	-	-

•

Non-reusable part

Fig 3: Engine Unit Removal Components (3 Of 16)

Procedure		Part Name Code
20	NO. 1 FUEL HOSE	23801F	See step 20	-	-
21	WIRE HARNESS CLAMP BRACKET	-	-	-	-
22	REAR ENGINE MOUNTING STAY RH	12327	-	-	-
23	INTAKE MANIFOLD	17111	See step 23	-	-
24	NO. 1 INTAKE MANIFOLD TO HEAD GASKET	17177	-	-	-

•

Non-reusable part

Fig 4: Engine Unit Removal Components (4 Of 16)

Procedure		Part Name Code
25	FUEL PUMP PROTECTOR	23214A	-	-	-
26	NO. 1 FUEL PIPE SUB-ASSEMBLY	23801P	See step 26	-	-
27	FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY	23100X	-	-	-
28	FUEL PUMP LIFTER ASSEMBLY	23470	-	-	-
29	FUEL PUMP SPACER GASKET	23224D	-	-	-

*1	FUEL PUMP LIFTER GUIDE	-	-
•	Non-reusable part	-	-

Fig 5: Engine Unit Removal Components (5 Of 16)

Procedure		Part Name Code
30	NO. 1 ENGINE COVER	12611	-	-	-
31	VENTILATION HOSE	12261	-	-	-
32	NO. 2 VENTILATION HOSE	-	-	-	-
33	NO. 2 WATER BY-PASS HOSE	16264	-	-	-
34	NO. 6 WATER BY-PASS HOSE	16283	-	-	-
35	WIRE HARNESS CLAMP BRACKET	-	-	-	-
36	FUEL HOSE BRACKET	23881B	-	-	-
37	IGNITION COIL ASSEMBLY	19500	See step 37	-	-
38	WATER PUMP PULLEY	16173	See step 38	-	-