Caution / Notice / Hint

WARNING: This page is about a different car, the 2025 Lexus NX 350h, 2024 Lexus NX 350h, 2023 Lexus NX 350h, and 2022 Lexus NX 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 direct fuel injector 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 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 [11/2021 - ]
Replacement of ECM	Update ECU security key	Vehicle Control History (RoB) are stored	Refer to UPDATE ECU SECURITY KEY [11/2021 - ]
Replacement of ECM	Perform Vehicle Identification Number (VIN) registration	DTC is output	Refer to REGISTRATION [11/2021 - ]
Replacement of direct fuel injector assembly Replacement of fuel (engine room side) pump assembly Replacement of fuel pressure sensor Replacement of throttle body with motor assembly Cleaning the deposits from the throttle body with motor assembly Replacement of EGR valve assembly Gas leak from exhaust system is repaired	Inspection after repair	Poor idle, etc. Engine start function, etc.	Refer to INITIALIZATION [11/2021 - ]

WARNING:

Never perform work on fuel system components near any 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.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Sparks could cause vaporized fuel to ignite, resulting in a serious accident.

To prevent serious injury due to fuel spray from the high-pressure fuel lines, always discharge fuel system pressure before removing any fuel system components.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 [11/2021 - ]
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 [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
Lighting System (EXT)	Drive the vehicle straight ahead at 35 km/h (22 mph) or more for 5 seconds or more.	Refer to INITIALIZATION [11/2021 - ]
Front Camera System
Adaptive High Beam System

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: Fuel Injector (For Direct Injection) Removal Components (1 Of 2)

Callout - Procedure		Part Name Code
1	PRECAUTION	-	See step 1	-	-
2	DISCHARGE FUEL SYSTEM PRESSURE	-	See step 2	-	-
3	BATTERY SERVICE COVER PLATE	58491E	-	-	-
4	DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL	-	-	-	-

Fig 2: Fuel Injector (For Direct Injection) Removal Components (2 Of 2)

Callout - Procedure		Part Name Code
5	INTAKE MANIFOLD	17111	-	-	-
6	FUEL PIPE CLAMP	23841K	-	-	-
7	FUEL TUBE SUB-ASSEMBLY	23910A	See step 7	-	-
8	NO. 1 FUEL PIPE SUB-ASSEMBLY	23801P	See step 8	-	-
9	FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY	23100X	See step 9	-	-
10	FUEL PUMP SPACER GASKET	23224D	-	-	-
11	FUEL PUMP LIFTER ASSEMBLY	23470	-	-	-
12	WIRE HARNESS	-	-	-	-
13	FUEL DELIVERY PIPE	23814B	See step 13	-	-
14	DIRECT FUEL INJECTOR ASSEMBLY	23250E	See step 14	-	-
15	NOZZLE HOLDER CLAMP	23695A	-	-	-
16	NO. 3 FUEL INJECTOR BACK-UP RING	23258	See step 16	-	-
17	NO. 1 FUEL INJECTOR BACK-UP RING	23256	-	-	-
18	C-RING	-	-	-	-
19	INJECTOR VIBRATION INSULATOR	23291A	-	-	-
20	FUEL INJECTOR SEAL	23255A	See step 20	-	-

*1	FUEL PUMP FLANGE	*2	O-RING
•	Non-reusable part	-	-