HEADLIGHT ECU REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed, installed, or replaced during the headlight ECU sub-assembly removal/installation are shown below.

Necessary Procedure After Parts Removed/Installed/Replaced
Replacement Part or Procedure	Necessary Procedures	Effects/Inoperative when not performed	Link
Disconnect cable from negative battery terminal	Memorize steering angle neutral point	Lane departure alert system (w/ Steering Control)	Click here
		Simple intelligent parking assist system*1
		Toyota parking assist-sensor system (w/ Simple Intelligent Parking Assist System)*1
		Pre-collision system
	Initialize back door lock	Power door lock control system	Click here
	Drive the vehicle until stop and start control is permitted (approximately 5 to 60 minutes)*2	Stop and start system	Click here
Headlight ECU sub-assembly LH	Synchronize vehicle information Initialize headlight ECU sub-assembly LH	Automatic headlight beam level control system	Click here

*1: When performing learning using the GTS.

Click here

*2: w/ Stop and start system

Note

If the headlight ECU sub-assembly RH is replaced with a new one, vehicle information registration and initialization are not necessary.

Tech Tips

Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.

PROCEDURE

REMOVE HEADLIGHT ASSEMBLY

Click here
REMOVE HEADLIGHT ECU SUB-ASSEMBLY
Note

Make sure to replace the headlight gasket with a new one. Failure to do so may cause water ingress.
1. Remove the 3 screws.
2. Separate the connector cover from the headlight ECU sub-assembly.
3. Disconnect the connector to remove the headlight ECU sub-assembly.
  
  Note
  
  If the headlight ECU sub-assembly has been struck or dropped, replace it with a new one.
REMOVE HEADLIGHT GASKET
Note

Make sure to replace the headlight gasket with a new one. Failure to do so may cause water ingress.
1. Remove the headlight gasket.