Hyundai Sonata: 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
Circuit Diagram ...

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 (illuminati ...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Blind Spot Detection Unit Repair procedures
Removal 1. Disconnect the negative (-) battery terminal. 2. Remove the rear bumper. (Refer to Body - "Rear Bumper") 3. Remove the BSD unit (A) after loosening the mounting nuts.     Take care not to separate the bracket from rear bumper when removing the BSD sensor. ...

Hyundai Sonata LF 2014-2019 Service Manual: Rear Door Inside Handle Repair procedures
Replacement 1. Remove the rear door trim. (Refer to Rear Door - "Rear Door Trim") 2. Remove the rear door side curtain assembly. (Refer to Rear Door - "Rear door side curtain assembly") 3. After loosening the mounting screws, then remove the rear door inside handle (A). 4. Install ...

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