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 HV supply battery 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 - ]
Replacement of HV supply battery assembly	Battery status info update Battery diagnosis	HV battery status information cannot be updated	Refer to UTILITY [12/2023 - ]

*: 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 - ]

If the correct procedures are not followed according to the instructions in this manual, there is a danger of electric shock from the high voltage circuits.

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

Be sure to wear insulating gloves when working on high voltage wiring or components.
If work is performed without wearing insulating gloves, there is a danger of electric shock.
Do not allow water to contact the HV supply battery assembly.

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 - ]
If the HV supply battery assembly has been struck or dropped, replace it.
When connecting a connector to the HV supply battery assembly., confirm that the connector is securely connected through the following:
- Push the connector until a click sound is heard.

- Visually check and confirm that the connector is securely connected by pulling on it.
Make sure to insulate the high-voltage connectors and terminals of the HV supply battery assembly with insulating tape after removing it.
If the HV supply battery assembly stored without insulating the connectors and terminals, electric shock or fire may result.
When performing repairs around the HV supply battery assembly, such as using a tap, do not allow metal shavings to enter the HV supply battery assembly.
Do not touch any high voltage wire harnesses, connectors or parts with bare hands.
Do not allow foreign matter, such as grease or oil, to adhere to the bolts or nuts of the HV supply battery assembly.
Do not climb on top of or stand on the HV supply battery assembly.
Do not allow any foreign matter or water to enter the HV supply battery assembly.
If any bolts, nuts or clips are dropped into the HV supply battery assembly, make sure to remove them.
After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

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: HV Battery (For PHEV Model) Removal Components (1 Of 6)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
1	PRECAUTION	-	See step 1	-	-
2	READ VALUE USING GTS	-	See step 2	-	-
3	REFRIGERANT FROM REFRIGERATION SYSTEM	-	See step 3	-	-
4	SERVICE PLUG GRIP	G3834	-	-	-

Fig 2: HV Battery (For PHEV Model) Removal Components With Torque Specifications (2 Of 6)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
5	REMOVE NO. 2 INVERTER PROTECTOR	G921F	-	-	-
6	CHECK TERMINAL VOLTAGE	-	See step 6	-	-
7	INSTALL NO. 2 INVERTER PROTECTOR	G921F	-	-	-

*1	Connector Cover Assembly	-	-
	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: HV Battery (For PHEV Model) Removal Components (3 Of 6)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
8	REAR ENGINE UNDER COVER RH	-	-	-	-
9	FRONT FLOOR COVER LH	58166A	-	-	-
10	NO. 2 FLOOR UNDER COVER	58399D	-	-	-
11	FRONT FLOOR COVER RH	58165C	-	-	-
12	ENGINE UNDER COVER HEAT INSULATOR	51648B	See step 12	-	-

NO. 23 TRACTION BATTERY BRACKET

Fig 4: HV Battery (For PHEV Model) Removal Components (4 Of 6)

Procedure		Part Name Code
13	FRONT EXHAUST PIPE ASSEMBLY	17410	-	-	-
14	NO. 1 FLOOR HEAT INSULATOR	58151A	-	-	-
15	FRONT LOWER NO. 1 FLOOR HEAT INSULATOR	58152A	-	-	-

Fig 5: HV Battery (For PHEV Model) Removal Components (5 Of 6)

Procedure		Part Name Code
16	AIR CONDITIONING TUBE AND ACCESSORY ASSEMBLY	88710E	See step 16	-	-
17	FLOOR UNDER WIRE	821H1	See step 17	-	-
18	NO. 2 TRACTION BATTERY WIRE	G96B2	See step 18	-	-

*1	O-RING	-	-
•	Non-reusable part		Compressor oil ND-OIL 11 or equivalent

Fig 6: HV Battery (For PHEV Model) Removal Components (6 Of 6)

Procedure		Part Name Code
19	HV SUPPLY BATTERY ASSEMBLY	G9510	See step 19	-	-
20	VALVE TO CONNECTOR TUBE	88295A	See step 20	-	-
21	PERFORM RECOVERY INSPECTION	-	See step 21	-	-

*1	O-RING	-	-
•	Non-reusable part		Compressor oil ND-OIL 11 or equivalent