Caution / Notice / Hint

WARNING: This page is about a different car, the 2025 Lexus NX 250, 2024 Lexus NX 250, 2023 Lexus NX 250, and 2022 Lexus NX 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 assembly 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
Replacement of ECM	Update ECU security key	Vehicle Control History (RoB) are stored	Refer to UPDATE ECU SECURITY KEY [11/2021 - ]
	Perform Vehicle Identification Number (VIN) registration	DTC is output	Refer to REGISTRATION [11/2021 - ]
	Code registration	Engine start function	Refer to REGISTRATION [11/2021 - ]
Replacement of engine assembly Gas leak from exhaust system is repaired	Inspection after repair	Poor idle, etc. Engine start function, etc.	Refer to INITIALIZATION [11/2021 - ]
Replacement of starter assembly*1	Clear the number of starter operations	Stop and Start System	Refer to REGISTRATION [11/2021 - ]
Replacement of battery	Integrated current value initialization	Stop and Start System	Refer to REGISTRATION [11/2021 - ]
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	for UB80E, UB80FInitialization: Refer to INITIALIZATION [11/2021 - ] for UB80E, UB80F Registration: Refer to REGISTRATION [11/2021 - ]
Replacement of ECM (If transaxle compensation code read from ECM)	Perform reset memory*2 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*2 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 [11/2021 - ]
Tires	Initialization56 Tire Position Identification56	Tire Pressure Warning System	Refer to Procedures Necessary When Replacing Parts (for Tire Pressure Warning System) table below Refer to WORK PROCEDURE [11/2021 - 03/2023] , or refer to WORK PROCEDURE [03/2023 - 03/2024]
	Rear television camera assembly optical axis (Back camera position setting)	Parking Assist Monitor System	Refer to CALIBRATION [11/2021 - ]
	Parking assist ECU initialization	Panoramic View Monitor System	Refer to CALIBRATION [11/2021 - 03/2024]
for A25A-FKS (Type B) Tire	ECU Data Initialization (When performing tire replacement after RoB code X2104 is output)	Dynamic Torque Control AWD System (for T24A-FTS, A25A-FKS (Type B))	Refer to CALIBRATION [11/2021 - 03/2023] , or refer to CALIBRATION [03/2023 - ]
Wheel alignment adjustment	Perform reset memory Perform "Calibration"	DTCs are stored ABS warning light illuminates Slip indicator light illuminates Electronically controlled brake system does not operate correctly	Refer to RESET MEMORY / CALIBRATION [11/2021 - ]
Steering intermediate shaft assembly*4	Automatic rack centering	-	Refer to POWER STEERING ECU INITIAL SETTING [11/2021 - ]
Replacement of front bumper assembly*3	Front television camera view adjustment	Panoramic View Monitor System	Refer to CALIBRATION [11/2021 - 03/2024]
Suspension parts	Rear television camera assembly optical axis (Back camera position setting)	Parking Assist Monitor System	Refer to CALIBRATION [11/2021 - ]
	Parking assist ECU initialization	Panoramic View Monitor System	Refer to CALIBRATION [11/2021 - 03/2024]
	Perform headlight ECU sub-assembly LH initialization	Lighting System (w/ Automatic Headlight Beam Level Control System)	Refer to INITIALIZATION [11/2021 - 03/2022] , or refer to INITIALIZATION [03/2022 - ]

*1: When the starter assembly is replaced, "ST No. 1 relay" must be also replaced.

*2: Not necessary when ECM replaced with new one

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

*4: If matchmarks were not placed when removing parts related to steering operation, perform automatic rack centering.

*5: Also necessary after performing a tire rotation.

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

WARNING:

The engine assembly with transaxle is very heavy. Be sure to follow the procedure described in the repair information, or 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.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NOTE:

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.
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 (-) battery terminal.
Refer to INSPECTION MODE PROCEDURE [11/2021 - ]

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 15 km/h (10 mph) or more for 1 second or more.	Refer to INITIALIZATION [11/2021 - ]
Adaptive High Beam System
Lighting System (EXT)
Stop and Start System	Idle the engine for approximately 5 to 60 minutes or drive the vehicle until stop and start control is permitted.	Refer to PRECAUTION [11/2021 - 03/2023] , or refer to PRECAUTION [03/2023 - 03/2024]

LEARNING COMPLETES WHEN VEHICLE IS OPERATED NORMALLY

Effect/Inoperative Function when Necessary Procedure not Performed	Necessary Procedure	Link
E-latch System Back door opener	Perform door unlock operation with door control switch or electrical key transmitter sub-assembly switch.	Refer to INITIALIZATION [11/2021 - ]
Power Back Door System	Reset back door close position	Refer to INITIALIZATION [11/2021 - ]
Air Conditioning System	After the ignition switch is turned to ON, the servo motor standard position is recognized.	-

COMPONENTS (REMOVAL)

Fig 1: Engine Assembly Removal Components [11/2021 - 03/2024] (1 Of 9)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Callout - Procedure		Part Name Code
1	PRECAUTION	-	See step 1	-	-
2	RECOVER REFRIGERANT FROM REFRIGERATION SYSTEM	-	-	See step 2	-
3	DISCHARGE FUEL SYSTEM PRESSURE	-	See step 3	-	-
4	BATTERY	-	-	-	-
5	ALIGN FRONT WHEELS FACING STRAIGHT AHEAD	-	See step 5	-	-
6	SECURE STEERING WHEEL	-	See step 6	-	-
7	FRONT WHEELS	-	-	-	-
8	FRONT FENDER FRONT SPLASH SHIELD LH	53896B	-	-	-
9	FRONT FENDER FRONT SPLASH SHIELD RH	53895B	-	-	-
10	NO. 1 ENGINE UNDER COVER	51441	-	-	-
11	NO. 2 ENGINE UNDER COVER ASSEMBLY	51420	-	-	-
12	FRONT FENDER APRON SEAL LH	53737B	-	-	-
13	FRONT FENDER APRON SEAL RH	53736	-	-	-

Fig 2: Engine Assembly Removal Components [11/2021 - 03/2024] (2 Of 9)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Callout - Procedure		Part Name Code
14	FRONT FLOOR COVER LH	58166A	See step 14	-	-
15	FRONT FLOOR COVER RH	58165C	See step 15	-	-
16	FRONT BUMPER ASSEMBLY	-	-	-	-
17	FRONT BUMPER LOWER ABSORBER	52618	-	-	-
18	NO. 2 FRONT BUMPER REINFORCEMENT	52132A	-	-	-
19	DRAIN ENGINE COOLANT (for Engine)	-	-	See step 19	-
20	DRAIN ENGINE OIL	-	-	See step 20	-
21	DRAIN AUTOMATIC TRANSAXLE FLUID	-	-	See step 21	-
22	DRAIN TRANSFER OIL (for AWD)	-	-	See step 22	-

Fig 3: Engine Assembly Removal Components [11/2021 - 03/2024] (3 Of 9)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Callout - Procedure		Part Name Code
23	NO. 1 ENGINE COVER SUB-ASSEMBLY	12601B	See step 23	-	-
24	INLET AIR CLEANER ASSEMBLY	17750A	-	-	-
25	VACUUM HOSES	-	-	-	-
26	NO. 2 VENTILATION HOSE	12262	-	-	-
27	AIR CLEANER ASSEMBLY WITH AIR CLEANER HOSE	-	-	-	-
28	ECM	89661	See step 28	-	-
29	BATTERY CLAMP SUB-ASSEMBLY	74404B	-	-	-

NO. 2 ENGINE WIRE

ENGINE ROOM MAIN WIRE

Fig 4: Engine Assembly Removal Components [11/2021 - 03/2024] (4 Of 9)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Callout - Procedure		Part Name Code
30	FUEL VAPOR FEED HOSE ASSEMBLY	23820	-	-	-
31	NO. 1 VACUUM HOSE CONNECTOR	44777	-	-	-
32	OUTLET HEATER WATER HOSE	87246	See step 32	-	-
33	INLET HEATER WATER HOSE	87245	See step 33	-	-
34	FUEL TUBE SUB-ASSEMBLY	23901	See step 34	-	-
35	NO. 1 RADIATOR HOSE	16571C	-	-	-
36	NO. 2 RADIATOR HOSE	16572D	-	-	-
37	SUCTION HOSE SUB-ASSEMBLY	88704	See step 37	-	-
38	DISCHARGE HOSE SUB-ASSEMBLY	88703	See step 38	-	-
39	WIRE HARNESS	-	-	-	-
40	NO. 5 WATER BY-PASS HOSE	16282F	-	-	-
41	STEERING INTERMEDIATE SHAFT ASSEMBLY	45220	See step 41	-	-

*1	NO. 1 RELAY BLOCK COVER	*2	NO. 1 FUEL PIPE CLAMP
•	Non-reusable part	-	-

Fig 5: Engine Assembly Removal Components [11/2021 - 03/2024] (5 Of 9)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Callout - Procedure		Part Name Code
42	FRONT EXHAUST PIPE ASSEMBLY (TWC: Rear Catalyst)	17410	See step 42	-	-
43	PROPELLER W/CENTER BEARING SHAFT ASSEMBLY	37100	-	-	-

*A	for AWD	-	-
•	Non-reusable part	-	-

Fig 6: Engine Assembly Removal Components With Torque Specifications [11/2021 - 03/2024] (6 Of 9)

Callout - Procedure		Part Name Code
44	FRONT DRIVE SHAFT ASSEMBLY	-	-	-	-
45	TIE ROD ASSEMBLY LH	45470	See step 45	-	-
46	TIE ROD ASSEMBLY RH	45460	See step 46	-	-
47	ENGINE ASSEMBLY WITH TRANSAXLE	-	See step 47	-	-
48	FUEL DELIVERY GUARD	23825A	-	-	-
49	INSTALL ENGINE HANGERS	-	See step 49	-	-

*A	for Nut Type A	*B	for Nut Type B
*1	FRONT BUMPER EXTENSION SUB-ASSEMBLY LH	*2	FRONT BUMPER EXTENSION SUB-ASSEMBLY RH
*3	FRONT SUSPENSION MEMBER BRACE REAR LH	*4	FRONT SUSPENSION MEMBER BRACE REAR RH
*5	COTTER PIN	-	-
	N.m (kgf/cm, ft.lbf): Specified torque	•	Non-reusable part

Fig 7: Engine Assembly Removal Components [11/2021 - 03/2024] (7 Of 9)

Callout - Procedure		Part Name Code
50	FLYWHEEL HOUSING UNDER COVER	11361J	-	-	-
51	DRIVE PLATE AND TORQUE CONVERTER ASSEMBLY SETTING BOLT	32101A	See step 51	-	-
52	FLOW SHUTTING VALVE (NO. 1 WATER BY-PASS HOSE)	16261G	See step 52	-	-
53	FLOW SHUTTING VALVE (WATER BY-PASS HOSE ASSEMBLY)	16260	See step 53	-	-
54	VACUUM HOSE	-	-	-	-
55	BREATHER PLUG HOSE	35104V	See step 55	-	-
56	STEERING GEAR HEAT INSULATOR	45319	-	-	-
57	WIRE HARNESS	-	See step 57	-	-
58	FRONT FRAME ASSEMBLY	51100G	-	-	-
59	FRONT ENGINE MOUNTING BRACKET	12311A	-	-	-
60	FRONT ENGINE MOUNTING INSULATOR	12361	See step 60	-	-
61	REAR ENGINE MOUNTING INSULATOR	12371A	See step 61	-	-

*A	for 2WD	*B	for AWD
*1	HOSE CLAMP	*2	TRANSMISSION BREATHER CLAMP
*3	BREATHER PLUG SUB-ASSEMBLY	-	-
*a	BLACK COLOR: x 1 SILVER COLOR: x 5	-	-
*	Precoated part	-	-

Fig 8: Engine Assembly Removal Components [11/2021 - 03/2024] (8 Of 9)

Callout - Procedure		Part Name Code
62	FLYWHEEL HOUSING SIDE COVER	11363A	-	-	-
63	STARTER ASSEMBLY	28100	-	-	-
64	AUTOMATIC TRANSAXLE ASSEMBLY	30500	See step 64	-	-
65	DRIVE PLATE & RING GEAR SUB-ASSEMBLY	32101	See step 65	-	-
66	NO. 1 CRANKSHAFT POSITION SENSOR PLATE	19315	-	-	-
67	ENGINE WIRE	82121	-	-	-
68	ENGINE ASSEMBLY TO ENGINE STAND	-	See step 68	-	-
69	REMOVE ENGINE HANGERS	-	-	-	-

*1	REAR DRIVE PLATE SPACER	*2	NO. 2 ENGINE WIRE
*3	ENGINE ASSEMBLY	-	-
•	Non-reusable part	*	Precoated part

Fig 9: Engine Assembly Removal Components [11/2021 - 03/2024] (9 Of 9)

Callout - Procedure		Part Name Code
70	ENGINE MOUNTING INSULATOR SUB-ASSEMBLY RH	12305	-	-	-
71	ENGINE MOUNTING SPACER	12341	-	-	-
72	ENGINE MOUNTING BRACKET SUB-ASSEMBLY LH	12304	-	-	-

*1	RADIATOR RESERVE TANK ASSEMBLY	*2	NO. 2 EARTH WIRE
*3	SUCTION PIPE SUB-ASSEMBLY	*4	AIR CONDITIONING TUBE ASSEMBLY