A car's keyless entry system, commonly known as keyless remote or key fob, allows drivers to unlock or lock their vehicles without using a physical key. Here's how it generally works:
It's worth noting that various keyless entry systems might have different details or additional security measures like rolling codes, which use a different code each time the button is pressed to prevent "code grabbing" by potential thieves.
In summary, a car's keyless entry system uses radio waves to communicate between the key fob and the car's onboard computer. The key fob sends a unique code, which is received by the car's receiver antenna. The car's computer then verifies the code and grants access to the locking or unlocking mechanism. Additional features like trunk release or remote start can also be controlled through the key fob.