Caution / Notice / Hint

WARNING: This page is about a different car, the 2025 Lexus RX 450h+, 2025 Lexus RX 350h, 2024 Lexus RX 450h+, 2024 Lexus RX 350h, and 2023 Lexus RX 350h. 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*1	Refer to INITIALIZATION [10/2022 - ]
Replacement of ECM	Perform Vehicle Identification Number (VIN) registration	DTC is output	Refer to REGISTRATION [10/2022 - ]
	ECU configuration	-	Refer to ECU CONFIGURATION [10/2022 - ]
	Update ECU security key	Vehicle Control History (RoB) are stored	Refer to UPDATE ECU SECURITY KEY [10/2022 - ]
Replacement of hybrid motor control inverter 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	for THS-HEV Model: Refer to UTILITY [10/2022 - ] for PHEV Model: Refer to UTILITY [08/2023 - ]
Replacement of hybrid vehicle transaxle assembly	Resolver learning Initialize resolver
Tires	Initialization23 Tire Position Identification23	Tire Pressure Warning System	Refer to Procedures Necessary When Replacing Parts (for Tire Pressure Warning System) table below Refer to WORK PROCEDURE [08/2023 - ]
	Rear television camera assembly optical axis (Back camera position setting)*5	Parking Assist Monitor System	Refer to CALIBRATION [10/2022 - ]
	Parking assist ECU initialization*5	Panoramic View Monitor System	Refer to CALIBRATION [10/2022 - ]
	Parking assist ECU initialization*5	Advanced Park	Refer to CALIBRATION [10/2022 - ]
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 assembly4 Replacement of camshaft timing gear assembly4 Replacement of engine 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 (engine room side) 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 Gas leak from exhaust system is repaired Replacement of knock control sensor	Inspection after repair	Poor idle, etc. Engine start function, etc.	Refer to INITIALIZATION [10/2022 - ]
Replacement of front bumper assembly*4	Front television camera view adjustment	Panoramic View Monitor System	Refer to CALIBRATION [10/2022 - ]
Replacement of front bumper assembly*4	Front television camera view adjustment	Advanced Park	Refer to CALIBRATION [10/2022 - ]
Suspension parts	Rear television camera assembly optical axis (Back camera position setting)	Parking Assist Monitor System	Refer to CALIBRATION [10/2022 - ]
	Parking assist ECU initialization	Panoramic View Monitor System	Refer to CALIBRATION [10/2022 - ]
	Parking assist ECU initialization	Advanced Park	Refer to CALIBRATION [10/2022 - ]
	Perform headlight ECU sub-assembly LH initialization	Lighting System (w/ Automatic Headlight Beam Level Control System)	Refer to INITIALIZATION [10/2022 - ]
Front wheel alignment adjustment	Perform "Calibration"	DTCs are stored ABS warning light illuminates Slip indicator light illuminates Electronically controlled brake system does not operate correctly	except PHEV Model: Refer to RESET MEMORY / CALIBRATION [10/2022 - ] for PHEV Model: Refer to RESET MEMORY / CALIBRATION [08/2023 - ]

*1: When "[Parking Support Brake System icon] System Stopped See Owner's Manual" is displayed on the multi-information display.

*2: Also necessary after performing a tire rotation.

*3: It is not necessary to perform this procedure if the tire pressure warning valve and transmitters are installed to the same location.

*4: Even when not replacing the part, it is necessary to perform the specified necessary procedures after installation.

*5: The vehicle height changes because of tire replacement.

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.
Refer to PRECAUTION [10/2022 - ]
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 [10/2022 - ]

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 Procedure not Performed	Necessary Procedure	Link
Front Camera System	Drive the vehicle straight ahead at 35 km/h (22 mph) or more for 5 seconds or more.	Refer to INITIALIZATION [10/2022 - ]
Adaptive High Beam System
Lighting System (w/ Automatic Headlight Beam Level Control System)

LEARNING COMPLETES WHEN VEHICLE IS OPERATED NORMALLY

Effect/Inoperative Function when Necessary Procedure not Performed	Necessary Procedure	Link
Power Back Door System	Reset back door close position	Refer to INITIALIZATION [10/2022 - ]
Air Conditioning System	except PHEV Model: After the ignition switch is turned to ON, the servo motor standard position is recognized. for PHEV Model: After the ignition switch is turned to ON, the servo motor and cooler expansion valve standard position is recognized.	-

Effect/Inoperative Function when Necessary Procedure not Performed

Necessary Procedure

Link

Power Back Door System

Reset back door close position

Refer to INITIALIZATION [10/2022 - ]

Air Conditioning System

except PHEV Model:

After the ignition switch is turned to ON, the servo motor standard position is recognized.

for PHEV Model:

After the ignition switch is turned to ON, the servo motor and cooler expansion valve standard position is recognized.

COMPONENTS (REMOVAL)

Fig 1: Engine Unit Removal Components [08/2023 - ] (1 Of 4)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
1	DRIVE SHAFT BEARING BRACKET	43457	-	-	-
2	COMPRESSOR WITH MOTOR ASSEMBLY	88370	See step 2	-	-
3	NO. 2 WATER BY-PASS PIPE SUB-ASSEMBLY	16207	-	-	-
4	FLOW SHUTTING VALVE (WATER BY-PASS HOSE ASSEMBLY)	16260	-	-	-
5	NO. 1 EXHAUST MANIFOLD HEAT INSULATOR	17167	See step 5	-	-
6	MANIFOLD STAY	17118	See step 6	-	-
7	EXHAUST MANIFOLD	17141	See step 7	-	-
8	EXHAUST MANIFOLD TO HEAD GASKET	17173	-	-	-

*1	STUD BOLT	*2	WATER HOSE CLAMP BRACKET
•	Non-reusable part	-	-

Fig 2: Engine Unit Removal Components [08/2023 - ] (2 Of 4)

Procedure		Part Name Code
9	NO. 5 WATER BY-PASS HOSE	16282	-	-	-
10	THROTTLE BODY WITH MOTOR ASSEMBLY	22030	See step 10	-	-
11	NO. 6 WATER BY-PASS HOSE	16283	See step 11	-	-
12	THROTTLE BODY GASKET	22271	-	-	-
13	NO. 3 WATER BY-PASS HOSE	16267	-	-	-
14	NO. 4 WATER BY-PASS HOSE	16281	-	-	-
15	EGR COOLER ASSEMBLY	25680	-	-	-
16	EGR VALVE GASKET	25627	-	-	-
17	NO. 1 EGR COOLER GASKET	25685	-	-	-
18	NO. 1 EGR PIPE SUB-ASSEMBLY	25601	See step 18	-	-
19	EGR VALVE ADAPTER GASKET	25629	-	-	-
20	EGR INLET GASKET	25628	-	-	-
21	NO. 4 WATER BY-PASS HOSE	16281	-	-	-
22	NO. 8 WATER BY-PASS HOSE	16296	-	-	-
23	EGR VALVE ASSEMBLY	25620	See step 23	-	-
24	NO. 3 WATER BY-PASS PIPE	16279	See step 24	-	-
25	NO. 2 WATER BY-PASS PIPE	16278	See step 25	-	-
26	INTAKE MANIFOLD	17111	See step 26	-	-
27	NO. 1 INTAKE MANIFOLD TO HEAD GASKET	17177	-	-	-
28	FUEL PIPE CLAMP	23841K	-	-	-
29	FUEL TUBE SUB-ASSEMBLY	23910A	See step 29	-	-
30	NO. 1 FUEL PIPE SUB-ASSEMBLY	23801P	See step 30	-	-
31	FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY	23100X	See step 31	-	-
32	FUEL PUMP SPACER GASKET	23224D	-	-	-
33	FUEL PUMP LIFTER ASSEMBLY	23470	-	-	-

*A	for Type A	*B	for Type B
*C	w/ Stud Bolt	*D	w/o Stud Bolt
*1	FUEL PUMP FLANGE	-	-
•	Non-reusable part	-	-

Fig 3: Engine Unit Removal Components [08/2023 - ] (3 Of 4)

Procedure		Part Name Code
34	NO. 7 WATER BY-PASS HOSE	16295	-	-	-
35	SENSOR WIRE	82219A	See step 35	-	-
36	NO. 6 ENGINE WIRE	82126A	-	-	-
37	WIRE HARNESS CLAMP BRACKET	-	See step 37	-	-
38	FUEL DELIVERY PIPE SUB-ASSEMBLY	23807	See step 38	-	-
39	NO. 1 DELIVERY PIPE SPACER	23807V	-	-	-
40	INJECTOR VIBRATION INSULATOR	23291	-	-	-
41	NO. 5 ENGINE WIRE	82125N	-	-	-
42	PORT FUEL INJECTOR ASSEMBLY	23250F	See step 42	-	-
43	FUEL DELIVERY PIPE	23814B	See step 43	-	-
44	DIRECT FUEL INJECTOR ASSEMBLY	23250E	See step 44	-	-
45	NOZZLE HOLDER CLAMP	23695A	-	-	-
46	NO. 3 FUEL INJECTOR BACK-UP RING	23258	See step 46	-	-
47	NO. 1 FUEL INJECTOR BACK-UP RING	23256	-	-	-
48	C-RING	-	-	-	-
49	INJECTOR VIBRATION INSULATOR	23291A	-	-	-
50	FUEL INJECTOR SEAL	23255A	See step 50	-	-

•

Non-reusable part

Fig 4: Engine Unit Removal Components [08/2023 - ] (4 Of 4)

Procedure		Part Name Code
51	IGNITION COIL ASSEMBLY	19500	See step 51	-	-
52	ENGINE OIL LEVEL DIPSTICK GUIDE	11452	See step 52	-	-
53	NO. 3 EXHAUST MANIFOLD HEAT INSULATOR	17169A	-	-	-

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