Caution / Notice / Hint

WARNING: This page is about a different car, the 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 transaxle assembly with motor and inverter 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 [09/2023 - ]
	ECU configuration	-	Refer to ECU CONFIGURATION [09/2023 - ]
	Update ECU security key	Vehicle Control History (RoB) are stored	Refer to UPDATE ECU SECURITY KEY [09/2023 - ]
	Heavy knock history Save history Write history	-	Refer to REGISTRATION [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 [09/2023 - ]
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 [09/2023 - ]
Replacement of transaxle assembly with motor and inverter	ECU configuration	-	Refer to ECU CONFIGURATION [09/2023 - ]
Replacement of transaxle assembly with motor and inverter	A/T Compensation Code Reset A/T Code Registration (Arbitrary Code) Reset Memory K0/WSC Learning Value Reset WSC Deterioration Estimate Reset Road Test	Large shift shock Engine overruns Large shock when the engine is started and stopped Unintended engine stall	for Registration: Refer to REGISTRATION [09/2023 - ] for Initialization: Refer to INITIALIZATION [09/2023 - ]
Replacement of transaxle assembly with motor	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 [09/2023 - ]
Replacement of transaxle assembly with motor	A/T Compensation Code Reset A/T Code Registration (Arbitrary Code) Front Resolver Correction Value Writing Reset Memory K0/WSC Learning Value Reset WSC Deterioration Estimate Reset Road Test	Large shift shock Engine overruns Large shock when the engine is started and stopped Unintended engine stall	for Registration: Refer to REGISTRATION [09/2023 - ] for Initialization: Refer to INITIALIZATION [09/2023 - ]
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 [09/2023 - ]
Replacement of TCM	Possible to read transmission compensation code A/T Code Registration A/T Code Registration (Read Compensation Code) A/T Code Registration (Register Compensation Code (Automatic Input)) K0/WSC Learning Value Registration Read Learning Value Write Learning Value WSC Deterioration Estimate Registration Read Estimate Value Write Estimate Value Road Test	Large shift shock Engine overruns Large shock when the engine is started and stopped Unintended engine stall	for Registration: Refer to REGISTRATION [09/2023 - ] for Initialization: Refer to INITIALIZATION [09/2023 - ]
Replacement of TCM	Impossible to read transmission compensation code A/T Compensation Code Reset K0/WSC Information Restoration Compensation Code Restoration Learning Value Restoration Road Test	Large shift shock Engine overruns Large shock when the engine is started and stopped Unintended engine stall	Refer to INITIALIZATION [09/2023 - ]
Replacement of transaxle fluid*2	WSC Deterioration Estimate Update ATF Thermal Degradation Estimate Reset	The value of the Data List item "ATF Thermal Degradation Estimate" is not estimated correctly. The value of "WSC Deterioration Estimate Update" is not estimated correctly	Refer to INITIALIZATION [09/2023 - ]
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	Initialization34 Tire Position Identification34	Tire Pressure Warning System	Refer to Procedures Necessary When Replacing Parts (for Tire Pressure Warning System) table below Refer to WORK PROCEDURE [09/2023 - 12/2023] , or 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 - ]
w/ Automatic Headlight Beam Level Control System Headlight assembly LH	Synchronize vehicle information Perform headlight ECU (headlight assembly LH) initialization	Lighting system (w/ Automatic Headlight Beam Level Control System)	Refer to INITIALIZATION [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: Perform WSC Deterioration Estimate Update and ATF Thermal Degradation Estimate Reset after replacing approximately 50% or more of the total transaxle fluid volume when replacing the transaxle fluid or in procedures such as transaxle repair

*3: Also necessary after performing a tire rotation.

*4: 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 [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

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.	-

When replacing parts, perform procedures according to the following table.

Part Replaced or Procedure Performed	Before replacement		After replacement
Part Replaced or Procedure Performed	Read the resolver compensation value Refer to UTILITY [09/2023 - ]	Check the resolver compensation value directly underneath the QR code Refer to UTILITY [09/2023 - ]	ECU Configuration Refer to ECU CONFIGURATION [09/2023 - ]	Write the resolver compensation value Refer to UTILITY [09/2023 - ]
Hybrid motor control inverter assembly	◦	*	◦	◦
EV motor control inverter assembly	◦	*	◦	◦
Transaxle assembly with motor	◦	◦	-	◦
Rear transaxle with motor assembly	◦	◦	-	◦
Transaxle assembly with motor and inverter	-	-	◦	-
Rear transaxle with motor and inverter assembly	-	-	◦	-

*: Perform this step if it was not possible to read the resolver compensation value before replacement.◦: Necessary-: Not necessary

COMPONENTS (REMOVAL)

Fig 1: Hybrid Vehicle Transaxle Removal Components With Torque Specifications (1 Of 6)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
1	PERFORM RESOLVER INITIALIZATION	-	-	-	See step 1
2	ENGINE WITH TRANSAXLE ASSEMBLY WITH MOTOR AND INVERTER	-	-	-	-
3	ENGINE MOUNTING BRACKET CAP	12353	See step 3	-	-
4	ENGINE HANGER	-	See step 4	-	-
5	WATER BY-PASS HOSE ASSEMBLY	16260	-	-	-
6	NO. 4 WATER BY-PASS HOSE	16281N	-	-	-
7	NO. 1 INVERTER COOLING HOSE ASSEMBLY	G90A0A	-	-	-

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

Fig 2: Hybrid Vehicle Transaxle Removal Components (2 Of 6)

Procedure		Part Name Code
8	DISCONNECT ENGINE WIRE	82121	See step 8	-	-
9	TCM	89530C	See step 9	-	-
10	NO. 1 TCM BRACKET	89539M	-	-	-
11	STEERING GEAR HEAT INSULATOR	45319	-	-	-
12	HV AIR CONDITIONING WIRE	821H2	-	-	-
13	WIRE HARNESS CLAMP BRACKET	-	-	-	-
14	FLYWHEEL HOUSING SIDE COVER	11363A	-	-	-

Fig 3: Hybrid Vehicle Transaxle Removal Components (3 Of 6)

Procedure		Part Name Code
15	HV WATER PUMP BRACKET	G9141F	-	-	-

Fig 4: Hybrid Vehicle Transaxle Removal Components (4 Of 6)

Procedure		Part Name Code
16	FRONT FRAME ASSEMBLY	51100G	-	-	-
17	FRONT ENGINE MOUNTING INSULATOR	12361	-	-	-
18	DISCONNECT ENGINE WIRE	82121	-	-	-
19	FRONT ENGINE MOUNTING BRACKET	12311A	-	-	-
20	REAR ENGINE MOUNTING INSULATOR	12371A	-	-	-
21	REAR ENGINE MOUNTING BRACKET	12321A	-	-	-
22	NO. 2 ENGINE AND INVERTER STIFFENER	12347	-	-	-

Fig 5: Hybrid Vehicle Transaxle Removal Components (5 Of 6)

Procedure		Part Name Code
23	TRANSAXLE ASSEMBLY WITH MOTOR AND INVERTER	30610	See step 23	-	-

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

Procedure		Part Name Code
24	RESOLVER THERMISTOR WIRE	-	See step 24	-	-
25	WIRE HARNESS CLAMP BRACKET	-	-	-	-
26	UPPER INVERTER COVER	G9221G	See step 26	-	-
27	NO. 1 INVERTER BUSBER PLATE	-	See step 27	-	-
28	BREATHER HOSE	-	See step 28	-	-
29	HYBRID MOTOR CONTROL INVERTER ASSEMBLY	G92A0	See step 29	-	-
30	INVERTER CASE GASKET	-	See step 30	-	-
31	SHIFT CONTROL ACTUATOR BRACKET	35541	See step 31	-	-

*1	WIRE HARNESS CLAMP BRACKET	*2	SHIFT CONTROL ACTUATOR ASSEMBLY
*3	SHIFT CONTROL ACTUATOR SEAL	-	-
•	Non-reusable part	-	-