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 and installed, or replaced during hybrid vehicle transaxle 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 ECM	Perform Vehicle Identification Number (VIN) registration	DTC is output	Refer to REGISTRATION [12/2023 - ]
Replacement of ECM	Update ECU security key	Vehicle Control History (RoB) are stored	Refer to UPDATE ECU SECURITY KEY [09/2023 - ]
Replacement of engine assembly Gas leak from exhaust system is repaired	Inspection after repair	Poor idle, etc. Engine start function, etc.	Refer to INITIALIZATION [12/2023 - ]
Replacement of hybrid motor control inverter assembly	ECU configuration	-	Refer to ECU CONFIGURATION [09/2023 - ]
Replacement of hybrid motor control inverter assembly	Front Resolver Correction value Registration Front Resolver Correction value Writing	DTCs are stored Slight vibration at a vehicle speed of 5 km/h (3 mph) or less Shock or vibration during acceleration	Refer to UTILITY [12/2023 - ]
Replacement of service plug grip	High voltage fuse accumulated load history reset	DTCs are stored	Refer to UTILITY [12/2023 - ]
Replacement of hybrid vehicle transaxle assembly	Front Resolver Correction value Writing	DTCs are stored Slight vibration at a vehicle speed of 5 km/h (3 mph) or less Shock or vibration during acceleration	Refer to UTILITY [12/2023 - ]
Replacement of shift actuator ECU (Shift control actuator assembly)*1	Perform actuator position learning	Shift position not correctly changing Shift position indicator not illuminating or displaying the incorrect drive state	Refer to UTILITY [12/2023 - ]
Suspension parts	Rear television camera assembly optical axis (Back camera position setting)	Parking Assist Monitor System	Refer to CALIBRATION [09/2023 - ]
	Parking assist ECU initialization	Panoramic View Monitor System	Refer to CALIBRATION [09/2023 - ]
	Parking assist ECU initialization	Advanced Park	Refer to CALIBRATION [09/2023 - ]
	w/ Automatic Headlight Beam Level Control System: Perform headlight ECU (headlight assembly LH) initialization	Lighting System (EXT)	Refer to INITIALIZATION [09/2023 - ]
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 [12/2023 - ]
	Rear television camera assembly optical axis (Back camera position setting)	Parking Assist Monitor System	Refer to CALIBRATION [09/2023 - ]
	Parking assist ECU initialization	Panoramic View Monitor System	Refer to CALIBRATION [09/2023 - ]
	Parking assist ECU initialization	Advanced Park	Refer to CALIBRATION [09/2023 - ]
Replacement of front bumper assembly*1	Front television camera view adjustment	Panoramic View Monitor System	Refer to CALIBRATION [09/2023 - ]
Replacement of front bumper assembly*1	Front television camera view adjustment	Advanced Park	Refer to CALIBRATION [09/2023 - ]
Front wheel alignment adjustment	Perform "Calibration"	DTCs are stored ABS warning light illuminates Brake system warning light (yellow indicator) illuminates Slip indicator light illuminates Electronically controlled brake system disabled or malfunctions	Refer to RESET MEMORY / CALIBRATION [09/2023 - ]

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

*1: Even when not replacing the part, it is necessary to perform the specified necessary procedures after installation.

*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.

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 [12/2023 - ]

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

The engine assembly with transaxle is very heavy. Be sure to follow the procedure described in the appropriate service information , or the engine lifter may suddenly drop or the engine assembly with transaxle may fall off the engine lifter.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	An Object Exceeding Weight Limit of Engine Lifter

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 - ]
When disconnecting a wire harness of any component connected to the supply power of the integrated capacitor (integration control supply) or when removing the integrated capacitor (integration control supply), make sure to wait 5 minutes or more after turning the ignition switch off for self-diagnosis to complete and the voltage of the integrated capacitor (integration control supply) to discharge.
If the shift control actuator assembly is replaced or removed, make sure to perform actuator position learning.
If not performed after replacing the shift control actuator assembly, a malfunction such as the shift position not correctly changing, the shift position indicator not illuminating or displaying the incorrect drive state, etc. may occur.
When the shift control actuator assembly is replaced or removed, although the displayed value of Data List item "ACT Position Learning Complete Status" may be "Complete" based on information from before removal, make sure to perform actuator position learning.
When any of the above procedures are completed, change the shift position to all positions and check the following items:
- The shift position indicator illuminates in accordance with the current position.
- The vehicle does not move when in shift state P (parking brake released)
- The vehicle does not drive when in shift state N
- The vehicle drives when in shift state D or R

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 (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 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 standard position is recognized.	-

COMPONENTS (REMOVAL)

Fig 1: Hybrid Vehicle Transaxle Removal Components With Torque Specifications (1 Of 7)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
1	PERFORM RESOLVER INITIALIZATION	-	-	-	See step 1
2	ENGINE ASSEMBLY WITH TRANSAXLE	-	-	-	-
3	ENGINE HANGERS	-	See step 3	-	-
4	STEERING GEAR HEAT INSULATOR	45319	-	-	-
5	ENGINE WIRE	82121	See step 5	-	-
6	NO. 1 TRANSMISSION OIL COOLER HOSE ASSEMBLY	32930F	-	-	-

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

Fig 2: Hybrid Vehicle Transaxle Removal Components (2 Of 7)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
7	NO. 2 MOTOR COOLING HOSE	G1272C	-	-	-
8	NO. 1 MOTOR COOLING HOSE	G1271C	-	-	-
9	TRANSAXLE UNDER STOPPER BRACKET	33185B	-	-	-
10	NO. 1 MOTOR COOLING PIPE	G1251B	See step 10	-	-
11	NO. 3 MOTOR COOLING HOSE	G1273B	-	-	-

*1	NO. 2 OIL COOLER TUBE CLAMP	-	-
•	Non-reusable part	-	-

Fig 3: Hybrid Vehicle Transaxle Removal Components (3 Of 7)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
12	FRONT FRAME ASSEMBLY	51100G	-	-	-
13	FRONT ENGINE MOUNTING INSULATOR	12361	-	-	-
14	FRONT ENGINE MOUNTING BRACKET	12311A	-	-	-
15	REAR ENGINE MOUNTING INSULATOR	12371A	-	-	-
16	MANIFOLD STAY	17118	See step 16	-	-
17	REAR ENGINE MOUNTING BRACKET	12321A	-	-	-

Fig 4: Hybrid Vehicle Transaxle Removal Components (4 Of 7)

Procedure		Part Name Code
18	FLYWHEEL HOUSING UNDER COVER	11361J	-	-	-
19	HYBRID VEHICLE TRANSAXLE ASSEMBLY	30900	See step 19	-	-
20	CONNECTOR COVER	82821T	See step 20	-	-
21	TERMINAL CAP	82823M	See step 21	-	-
22	MOTOR CABLE	G1148	See step 22	-	-

•

Non-reusable part

Fig 5: Hybrid Vehicle Transaxle Removal Components (5 Of 7)

Procedure		Part Name Code
23	NO. 2 MOTOR COOLING PIPE	G1252A	-	-	-
24	OIL PUMP WITH MOTOR ASSEMBLY	35300B	-	-	-

*1	OIL COOLER UNION BOLT	-	-
•	Non-reusable part	-	-

Fig 6: Hybrid Vehicle Transaxle Removal Components (6 Of 7)

Procedure		Part Name Code
25	NO. 3 INVERTER BRACKET	G9216	-	-	-
26	WIRE HARNESS CLAMP BRACKET	-	-	-	-
27	TRANSAXLE HOUSING PLUG	30900D	-	-	-
28	STUD BOLT	-	See step 28	-	-
29	NO. 3 AUTOMATIC TRANSMISSION CASE COVER	35153C	-	-	-
30	TRANSAXLE BREATHER PLUG	30900N	-	-	-
31	TRANSAXLE HOUSING TUBE CONNECTOR	30900K	-	-	-

•

Non-reusable part

Fig 7: Hybrid Vehicle Transaxle Removal Components (7 Of 7)

Procedure		Part Name Code
32	SHIFT CONTROL ACTUATOR BRACKET	35541	See step 32	-	-

*1	SHIFT CONTROL ACTUATOR ASSEMBLY	*2	SHIFT CONTROL ACTUATOR SEAL
•	Non-reusable part	-	-