Caution / Notice / Hint

WARNING: This page is about a different car, the 2024 Lexus TX 550h+ and 2024 Lexus TX 500h. 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 No. 1 junction block 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
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*	Refer to INITIALIZATION [09/2023 - ]

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

WARNING:

Orange wire harnesses and connectors indicate high-voltage circuits. To prevent electric shock, always follow the procedure described in the appropriate service information .

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Refer to PRECAUTION [09/2023 - ]

To prevent electric shock, wear insulated gloves when working on wire harnesses and components of the high voltage system.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 [09/2023 - ]
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 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 [09/2023 - ]
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 [09/2023 - ]
Air Conditioning System	After the ignition switch is turned to ON, the servo motor and cooler expansion valve standard position is recognized.	-

COMPONENTS (REMOVAL)

Fig 1: Junction Block (For PHEV Model) Removal Components (1 Of 5)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
1	PRECAUTION	-	See step 1	-	-
2	SERVICE PLUG GRIP	G3834	-	-	-

Fig 2: Junction Block (For PHEV Model) Removal Components With Torque Specifications (2 Of 5)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
3	REMOVE NO. 2 INVERTER PROTECTOR	G921F	-	-	-
4	CHECK TERMINAL VOLTAGE	-	See step 4	-	-
5	INSTALL NO. 2 INVERTER PROTECTOR	G921F	-	-	-

Tightening torque for "Major areas involving basic vehicle performance such as moving/turning/stopping": N.m (kgf/cm, ft.lbf)

N.m (kgf/cm, ft.lbf): Specified torque

Fig 3: Junction Block (For PHEV Model) Removal Components (3 Of 5)

Procedure		Part Name Code
6	REAR NO. 1 SEAT ASSEMBLY	-	-	-	-
7	REAR NO. 2 SEAT ASSEMBLY	-	-	-	-
8	REAR CONSOLE BOX ASSEMBLY	58910C	-	-	-

Fig 4: Junction Block (For PHEV Model) Removal Components (4 Of 5)

Procedure		Part Name Code
9	JUNCTION BLOCK COVER	82672A	See step 9	-	-
10	NO. 3 HIGH VOLTAGE FLOOR UNDER WIRE	-	-	-	-
11	FLOOR UNDER WIRE	821H1	-	-	-

*1	FLOOR WIRE	*2	WIRING HARNESS CLAMP BRACKET
*3	NO. 3 CONSOLE BOX MOUNTING BRACKET	*4	FRONT FLOOR CARPET ASSEMBLY
*5	NO. 1 REAR FLOOR SILENCER	-	-

Fig 5: Junction Block (For PHEV Model) Removal Components (5 Of 5)

Procedure		Part Name Code
12	NO. 1 JUNCTION BLOCK ASSEMBLY	82670A	See step 12	-	-