THERMOSTAT REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during water inlet with thermostat sub-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
Battery terminal is disconnected/reconnected		Memorize steering angle neutral point	LKA /LDA system	Click here
			Intelligent clearance sonar system*1
			Pre-crash safety system
			Lighting system (EXT) Cornering lights
			Adaptive high beam system
		Drive the vehicle until stop and start control is permitted (approximately 15 to 60 minutes)	Stop and start system	Click here
		Memorize steering angle neutral point	Parking assist monitor system (w/ Parallel parking assist function)	Click here
			Parking assist monitor system (w/o Parallel parking assist function)	Click here
			Panoramic view monitor system	Click here
		Initialize back door lock	Power door lock control system	Click here
		Reset back door close position	Power back door system	Click here
Replacement of ECM		Perform Vehicle Identification Number (VIN) or frame number registration	MIL illuminates / - DTC P063051 is stored	Click here for 2GR-FKS (w/ Canister Pump Module) Click here for 2GR-FKS (w/o Canister Pump Module)
		ECU Communication ID Registration (Immobiliser system)	Engine start function	See Service Bulletin for the registration method.
		Perform code registration (Immobiliser system)	Wireless door lock control system Entry and start system Engine start function Steering lock system Telematics system	See Service Bulletin for the registration method.
Replacement of ECM (If possible, read the transaxle compensation code from the previous ECM)	Possible to read transaxle compensation code	Perform the following procedures in the order shown: Transfer Transaxle Compensation Code Perform Road Test to Allow ECM to Learn	Large shift shock Deterioration of fuel efficiency	Click here for Initialization (U881E) Click here for Registration (U881E) Click here for Initialization (U881F) Click here for Registration (U881F)
	Impossible to read transaxle compensation code	Perform the following procedures in the order shown: Reset Transaxle Compensation Code Perform Road Test to Allow ECM to Learn	Large shift shock Deterioration of fuel efficiency
Gas leaks from exhaust system		Inspection After Repair	Poor idle, etc. Engine start function, etc.	Click here for 2GR-FKS (w/ Canister Pump Module) Click here for 2GR-FKS (w/o Canister Pump Module)
Suspension, tires, etc. (The vehicle height changes because of suspension or tire replacement)		Ultrasonic sensor detection angle Ultrasonic sensor detection angle registration	Intelligent clearance sonar system LEXUS parking assist-sensor system (w/ Intelligent Clearance Sonar System)	Click here
		Rear television camera assembly optical axis (Back camera position setting)	Parking assist monitor system (w/ Parallel Parking Assist Function)	Click here for Initialization Click here for Calibration
			Parking assist monitor system (w/o Parallel Parking Assist Function)	for Calibration Click here for Initialization Click here
		Parking assist ECU initialization Adjust steering angle	Panoramic view monitor system	Click here for Initialization Click here for Calibration
		Initialize headlight ECU sub-assembly LH	Adaptive high beam system Automatic headlight beam level control system	Click here
Front wheel alignment adjustment		Clear zero point calibration data and system information. Perform yaw rate and acceleration sensor zero point calibration and store system information.	VSC disabled or malfunctions DTCs are stored Slip indicator light illuminates ABS warning light illuminates	Click here

*1: When performing learning using the GTS.

Click here

PROCEDURE

REMOVE ENGINE ASSEMBLY WITH TRANSAXLE

Click here
DISCONNECT ENGINE WIRE
1. Disconnect the water inlet with thermostat sub-assembly connector.
2. Remove the bolt to disconnect the engine wire.
REMOVE FRONT NO. 1 ENGINE MOUNTING BRACKET LH

Click here
DISCONNECT WATER BY-PASS HOSE
1. Slide the clip and disconnect the water by-pass hose.
REMOVE WATER INLET WITH THERMOSTAT SUB-ASSEMBLY
1. Remove the 2 bolts, 2 nuts and water inlet with thermostat sub-assembly.
2. Remove the gasket from the water inlet with thermostat sub-assembly.