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Problem Symptoms Table [10/2016 - 09/2020]

NOTE:

If the 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.

Refer to INITIALIZATION [10/2016 - 09/2020]

HINT:

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	Refer to Headlight Beam Level Control Actuator Circuit [10/2016 - 09/2020]
	No. 1 Headlight ECU sub-assembly LH	Refer to REMOVAL [10/2016 - 09/2020]
Automatic headlight beam level control system does not operate (Right Headlight)	Headlight beam level control actuator circuit	Refer to Headlight Beam Level Control Actuator Circuit [10/2016 - 09/2020]
	No. 1 Headlight ECU sub-assembly RH	Refer to REMOVAL [10/2016 - 09/2020]
Initialization cannot be performed	CAN communication system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2016 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - ]
Initialization cannot be performed	No. 1 Headlight ECU sub-assembly LH	Refer to REMOVAL [10/2016 - 09/2020]