Hyundai Elantra: 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 Elantra AD (2016-2020) Service Manual: Hazard Lamp Switch Repair procedures
Inspection 1. Check for continuity between terminals. If the continuity is not as specified, replace the hazard lamp switch. Manual (Auto) Removal     • Wrap the protective tape on the tool to disassemble with the screwdriver or remover. • e caution in keeping ...

Hyundai Elantra AD (2016-2020) Service Manual: Main Crash Pad Assembly Repair procedures
Replacement     • Put on gloves to prevent hand injuries.     • When removing with a flat-tip screwdriver or remover, wrap protective tape around the tools to prevent damage to components. • Use a plastic panel removal tool to remove int ...

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