What does it mean when the security light is flashing?

[DeLouis]

security light flashing indicates that the vehicle's anti-theft system is in a locked state. The security light is a safety indicator light. After turning off the engine and locking the doors, it is normal for the light to flash, indicating that the engine electronic anti-theft lock is functioning. If the security light does not flash, it means the anti-theft system is not activated, possibly due to a door not being properly closed. The vehicle anti-theft system is designed to prevent theft of the vehicle itself or items inside. It consists of an electronically controlled remote or key, electronic control circuits, alarm devices, and actuators. Early vehicle door locks were mechanical and only served to prevent doors from opening automatically while driving to avoid accidents, providing driving safety but no anti-theft function. With societal progress, advancements in technology, and the increasing number of vehicles, later models of cars and trucks were equipped with key-operated door locks. These locks control only one door, while other doors are opened or locked using the door lock buttons inside the vehicle.