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 cylinder block 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 piston or piston ring 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:

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 (DISASSEMBLY)

Fig 1: Cylinder Block Disassembly Components [08/2023 - ]

Procedure		Part Name Code
1	INSPECT CONNECTING ROD THRUST CLEARANCE	-	See step 1	-	-
2	INSPECT CONNECTING ROD OIL CLEARANCE	-	See step 2	-	-
3	PISTON WITH CONNECTING ROD	-	See step 3	-	-
4	CONNECTING ROD BEARING	13041	-	-	-
5	INSPECT CRANKSHAFT THRUST CLEARANCE	-	See step 5	-	-
6	CRANKSHAFT BEARING CAP	-	See step 6	-	-
7	CRANKSHAFT	13411	-	-	-
8	CRANKSHAFT THRUST WASHER	11791	-	-	-
9	CRANKSHAFT BEARING	11711	-	-	-
10	PISTON RING SET	13011	See step 10	-	-
11	PISTON PIN	-	See step 11	-	-
12	NO. 1 OIL NOZZLE SUB-ASSEMBLY	15708	See step 12	-	-
13	NO. 2 OIL NOZZLE SUB-ASSEMBLY	15709	See step 13	-	-
14	RING PIN	-	See step 14	-	-
15	STRAIGHT PIN	-	See step 15	-	-

*1	CONNECTING ROD BEARING CAP	-	-
	Tightening torque for "Major areas involving basic vehicle performance such as moving/turning/stopping": N.m (kgf/cm, ft.lbf)	•	Non-reusable part
*T1	1st: 38 (387, 28) 2nd: Turn 90°	-	-