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 fuel pump control ECU 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 - ]
Rear seatback assembly LH2 Rear seatback assembly RH2	Initialize fold seat control ECU	Rear Power Seat Control System	Refer to INITIALIZATION [10/2022 - ]

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

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

NOTE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Refer to BEFORE DISCONNECTING BATTERY [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.

ITEMS FOR WHICH LEARNING IS COMPLETED BY DRIVING THE VEHICLE

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 second or more.	Refer to INITIALIZATION [10/2022 - ]
Adaptive High Beam System
Lighting System (w/ Automatic Headlight Beam Level Control System)

ITEMS FOR WHICH LEARNING IS COMPLETED BY OPERATING THE VEHICLE 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: Fuel Pump ECU Removal Components [08/2023 - ] (1 Of 2)

Procedure		Part Name Code
1	REAR SEAT ASSEMBLY	-	-	-	-
2	REAR DOOR SCUFF PLATE LH	67918A	-	-	-
3	NO. 3 BATTERY SERVICE COVER BOARD	58467J	-	-	-
4	REAR SEAT SIDE GARNISH LH	62552F	-	-	-

Fig 2: Fuel Pump ECU Removal Components [08/2023 - ] (2 Of 2)

Procedure		Part Name Code
5	FUEL PUMP CONTROL ECU	89571	See step 5	-	-
6	FUEL PUMP CONTROL ECU BRACKET	89573	-	-	-