Hyundai Sonata LF: Auto Lighting Control System / Description and Operation

Hyundai Sonata LF 2014-2019 Service Manual / Body Electrical System / Auto Lighting Control System / Description and Operation

Description

It's a system that uses illumination sensor to automatically turn ON the tail lamp and head lamp based on the change in surrounding environment's illumination condition. It activates when the vehicle enters/exits tunnel, or when the illumination condition in surrounding environment changes due to rain, snow, or fog. Precautions corresponding to the use of this system are as follows.

1.	Do not add another device on top of this device.

2.	Be sure to switch to manual during poor visibility climate, such as fog, heavy rain, or cloudy weather.

3.	Illumination intensity in an actual vehicle is not always constant, and lamp ON/OFF time may very depending on the climate, season, and surrounding environment.

4.	Use this system only during sunrise and sunset period, and manually control lamp ON/OFF for general conditions.

5.	Error may occur if light block coating that may change interior illumination is applied.

Schematic Diagrams

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Auto Light Sensor Repair procedures

Inspection Check if the auto light control operates like a timing chart shown below. Tail lamp output and head lamp (Low) output is controlled based on the auto light sensor's input (illumination intensity) when the Auto Light Switch in Multi-Function Switch is turned ON, and the vehicle is in IGN1 or IGN2 ON Mode...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Clutch Engagement Fork and Engagement Bearing Components and Components Location

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Hyundai Sonata LF 2014-2019 Service Manual: Description and Operation