AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM PROBLEM SYMPTOMS TABLE

Note

If No. 1 headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the No. 1 headlight ECU sub-assembly LH.

Tech Tips

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Automatic Headlight Beam Level Control System
Symptom	Suspected Area	Link
Automatic headlight beam level control system does not operate (Left Headlight)	Headlight beam level control actuator circuit	Click here
	No. 1 headlight ECU sub-assembly LH	Click here
Automatic headlight beam level control system does not operate (Right Headlight)	Headlight beam level control actuator circuit	Click here
	No. 1 headlight ECU sub-assembly RH	Click here
Initialization cannot be performed	CAN communication system	Click here
Initialization cannot be performed	No. 1 headlight ECU sub-assembly LH	Click here