Caution / Notice / Hint

WARNING: This page is about a different car, the 2025 Lexus NX 350, 2024 Lexus NX 350, 2023 Lexus NX 350, and 2022 Lexus NX 350. 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 fuel (engine room side) pump 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 fuel (engine room side) pump assembly	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 (-) 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 (-) 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 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 15 km/h (10 mph) or more for 1 second or more.	Refer to INITIALIZATION [11/2021 - ]
Front Camera System
Adaptive High Beam System
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 [03/2023 - 03/2024] , or refer to PRECAUTION [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: Fuel Pump (For High Pressure) Removal Components [03/2023 - ] (1 Of 2)

Callout - Procedure		Part Name Code
1	PRECAUTION	-	See step 1	-	-
2	DISCHARGE FUEL SYSTEM PRESSURE	-	See step 2	-	-
3	DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL	-	-	-	-
4	NO. 1 ENGINE COVER SUB-ASSEMBLY	12601B	See step 4	-	-
5	NO. 3 ENGINE COVER	12613	-	-	-
6	NO. 2 ENGINE COVER SUB-ASSEMBLY	12602D	-	-	-
7	AIR CLEANER CAP WITH AIR CLEANER HOSE	-	-	-	-
8	ENGINE WIRE	82121	-	-	-
9	PURGE VALVE (PURGE VSV)	25860D	-	-	-
10	AIR TUBE ASSEMBLY	17360A	See step 10	-	-

*1	AIR TUBE SUPPORT	*2	VACUUM HOSE SUB-ASSEMBLY
•	Non-reusable part	-	-

Fig 2: Fuel Pump (For High Pressure) Removal Components [03/2023 - ] (2 Of 2)

Callout - Procedure		Part Name Code
11	FUEL TUBE SUB-ASSEMBLY	23901	See step 11	-	-
12	NO. 1 FUEL PIPE SUB-ASSEMBLY	23801P	See step 12	-	-
13	FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY	23100X	See step 13	-	-
14	FUEL PUMP SPACER GASKET	23224D	-	-	-
15	FUEL PUMP LIFTER ASSEMBLY	23470	-	-	-

*1	FUEL PUMP SPACER	-	-
•	Non-reusable part	-	-