ENGINE STOP AND START ECU 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 engine stop and start ECU 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 engine stop and start ECU	Upload the number of starter operations Reset Air Conditioning Information Learning Air Conditioning Information Clear the Zero Point Calibration Data Deceleration Sensor Zero Point Calibration	Stop and start system	Click here
Replacement of clearance warning ECU assembly	Registration of bumper type	LEXUS parking assist-sensor system	Click here

*1: When performing learning using the GTS.

Click here

PROCEDURE

PRECAUTION

Note

After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

Click here
READ NUMBER OF STARTER OPERATIONS

Click here
DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

Note

When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

Click here
REMOVE FRONT DOOR SCUFF PLATE LH (for LHD)

Click here
REMOVE COWL SIDE TRIM BOARD LH (for LHD)

Click here
REMOVE NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY (for LHD)

Click here
REMOVE FRONT DOOR SCUFF PLATE LH (for RHD)

Click here
REMOVE COWL SIDE TRIM BOARD LH (for RHD)

Click here
REMOVE INSTRUMENT PANEL GARNISH LH (for RHD)

Click here
REMOVE LOWER NO. 1 INSTRUMENT PANEL FINISH PANEL (for RHD)

Click here
REMOVE NO. 2 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY (for RHD)

Click here
REMOVE GLOVE COMPARTMENT DOOR ASSEMBLY (for RHD)

Click here
REMOVE ENGINE STOP AND START ECU (for LHD)
1. Disconnect the 3 engine stop and start ECU connectors.
2. Remove the 2 nuts and engine stop and start ECU from the wiring harness clamp bracket.
REMOVE ECU INTEGRATION BOX LH (for RHD)

Click here
REMOVE ENGINE STOP AND START ECU (for RHD)
1. Disengage the 2 claws and remove the engine stop and start ECU as shown in the illustration.