Caution / Notice / Hint

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. 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, installed, or replaced during water inlet with thermostat sub-assembly removal/installation are shown below.

NECESSARY PROCEDURES AFTER PARTS REMOVED/INSTALLED/REPLACED

Replaced Part or Performed Procedure	Necessary Procedures	Effect/Inoperative Function When Necessary Procedures are not Performed	Link
Disconnect cable from negative auxiliary battery terminal	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*	Refer to INITIALIZATION [09/2023 - ]

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

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 [09/2023 - ]

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 Procedures are not Performed	Necessary Procedures	Link
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 [09/2023 - ]
Lighting System (w/ Automatic Headlight Beam Level Control System)	Drive the vehicle straight ahead at 15 km/h (10 mph) or more for 1 second or more.	Refer to INITIALIZATION [09/2023 - ]
Front Camera System
Adaptive High Beam System

LEARNING COMPLETES WHEN VEHICLE IS OPERATED NORMALLY

Effect/Inoperative Function When Necessary Procedures are not Performed	Necessary Procedures	Link
Power Back Door System	Reset back door close position	Refer to INITIALIZATION [09/2023 - ]
Air Conditioning System	After the ignition switch is turned to ON, the servo motor standard position is recognized.	-

COMPONENTS (REMOVAL)

Fig 1: Thermostat Removal Components (1 Of 3)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
1	FRONT WHEEL OPENING EXTENSION PAD LH	53852B	-	-	-
2	FRONT WHEEL OPENING EXTENSION PAD RH	53851D	-	-	-
3	NO. 1 ENGINE UNDER COVER	51441	-	-	-
4	REAR ENGINE UNDER COVER LH	51444A	-	-	-
5	REAR ENGINE UNDER COVER RH	51443C	-	-	-
6	SUSPENSION TOWER DAMPER	48691E	See step 6	-	-
7	DRAIN ENGINE COOLANT (for Engine)	-	-	See step 7	-

Fig 2: Thermostat Removal Components (2 Of 3)

Procedure		Part Name Code
8	INTERCOOLER RESERVE TANK ASSEMBLY	16640	-	-	-
9	RADIATOR RESERVE TANK ASSEMBLY	16470	-	-	-
10	ELECTRIC HEATER SUB-ASSEMBLY	87101G	-	-	-
11	NO. 2 ENGINE MOUNTING STAY RH	12327A	-	-	-
12	REAR ENGINE MOUNTING STAY RH	12327	-	-	-
13	ENGINE MOUNTING INSULATOR SUB-ASSEMBLY RH	12305	See step 13	-	-

*1	WIRE HARNESS CLAMP BRACKET	*2	ENGINE WIRE
*3	SUCTION HOSE SUB-ASSEMBLY	*4	NO. 2 GROUND WIRE

Fig 3: Thermostat Removal Components (3 Of 3)

Procedure		Part Name Code
14	ENGINE MOUNTING BRACKET RH	12315A	-	-	-
15	NO. 2 RADIATOR HOSE	16572D	-	-	-
16	WATER BY-PASS HOSE	16261	-	-	-
17	WATER INLET WITH THERMOSTAT SUB-ASSEMBLY	16031	-	-	-

*1	GASKET	-	-
•	Non-reusable part	-	-