Caution / Notice / Hint

WARNING: This page is about a different car, the 2025 Lexus NX 350h, 2024 Lexus NX 350h, 2023 Lexus NX 350h, and 2022 Lexus NX 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 HV battery 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
Replacement of HV battery junction block assembly	Current sensor offset learning	DTCs are stored	See step 14

WARNING:

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Refer to PRECAUTION [11/2021 - ]

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:

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 [11/2021 - ]

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
Lighting System (EXT)	Drive the vehicle straight ahead at 35 km/h (22 mph) or more for 5 seconds or more.	Refer to INITIALIZATION [11/2021 - ]
Front Camera System
Adaptive High Beam System

LEARNING COMPLETES WHEN VEHICLE IS OPERATED NORMALLY

Effect/Inoperative Function when Necessary Procedure not Performed	Necessary Procedure	Link
E-latch System Back door opener	Perform door unlock operation with door control switch or electrical key transmitter sub-assembly switch.	Refer to INITIALIZATION [11/2021 - ]
Power Back Door System	Reset back door close position	Refer to INITIALIZATION [11/2021 - ]
Air Conditioning System	After the ignition switch is turned to ON, the servo motor standard position is recognized.	-

COMPONENTS (REMOVAL)

Fig 1: HV Relay Assembly Removal Components (1 Of 4)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Fig 2: HV Relay Assembly Removal Components With Torque Specifications (2 Of 4)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Callout - Procedure		Part Name Code
3	REMOVE NO. 2 INVERTER PROTECTOR	G921F	-	-	-
4	DISCONNECT ENGINE ROOM MAIN WIRE	82111	See step 4	-	-
5	REMOVE CONNECTOR COVER ASSEMBLY	-	See step 5	-	-
6	CHECK TERMINAL VOLTAGE	-	See step 6	-	-
7	INSTALL CONNECTOR COVER ASSEMBLY	-	See step 7	-	-
8	CONNECT ENGINE ROOM MAIN WIRE	82111	See step 8	-	-
9	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: HV Relay Assembly Removal Components (3 Of 4)

Callout - Procedure		Part Name Code
10	REAR SEAT CUSHION ASSEMBLY	-	See step 10	-	-
11	REAR SEAT CUSHION LOCK HOOK	72693	-	-	-
12	REAR DOOR SCUFF PLATE LH	67918A	-	-	-
13	NO. 3 BATTERY SERVICE COVER BOARD	58467J	-	-	-
14	REAR DOOR SCUFF PLATE RH	67917A	-	-	-
15	NO. 2 BATTERY SERVICE COVER BOARD	58466K	-	-	-
16	BATTERY SERVICE COVER BOARD	58464D	-	-	-
17	REAR SEAT CUSHION LEG SUB-ASSEMBLY	71033	-	-	-

•

Non-reusable part

Fig 4: HV Relay Assembly Removal Components (4 Of 4)

Callout - Procedure		Part Name Code
18	NO. 1 HV BATTERY COVER PANEL RH	G92N4A	See step 18	-	-
19	FLOOR UNDER WIRE	821H1	See step 19	-	-
20	FLOOR WIRE	82161	See step 20	-	-
21	HV BATTERY JUNCTION BLOCK ASSEMBLY	G92Z0	See step 21	-	-

*1	BATTERY COVER LOCK STRIKER	*2	ELECTRIC VEHICLE BATTERY PLUG ASSEMBLY
*3	WIRING HARNESS PROTECTOR	-	-