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How does it work? Remote Keyless Entry

How does it work? Remote Keyless Entry

A keyless entry system is an electronic lock that controls access to your vehicle without using a traditional mechanical key. It refers to a lock that uses an electronic remote control as a key which is activated by a handheld device near the vehicle.

A remote keyless system can include both a remote keyless entry system (RKE), which unlocks the doors, and a remote keyless ignition system (RKI), which starts the engine.

There is a small chip that creates the code that gets transmitted from the key to the vehicle.

The controller chip in any modern controller uses something called a hopping code or a rolling code to provide security.

The transmitter’s controller chip has a memory location that holds the current 40-bit code. When you push a button on your key fob, it sends that 40-bit code along with a function code that tells the car what you want to do, lock the doors, unlock the doors or open the trunk.

The receiver’s controller chip also has a memory location that holds the current 40-bit code. If the receiver gets the 40-bit code it expects, then it performs the requested function.

Both the transmitter and the receiver use the same number generator. In this way, the transmitter and the receiver are synchronized. The receiver only opens the door if it receives the code it expects.

If your keyless entry remote and your car are no longer communicating, you will have to reprogram your car’s keyless entry system.

Carless entry reprograming require special equipment. You will need to contact your local dealer or Townsville Mobile Mechanic. If you have any problems with your keyless entry Townsville Mobile Mechanic can help. Call Sandro on 0400401171 or book in through our website www.townsvillemobilemechanic.com.au


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  • Christian Bishop
    April 8, 2020, 4:43 am REPLY

    Thanks for this great piece of information. I think that With the remote keyless-entry systems that you find on cars today, security is a big issue. If people could easily open other people’s cars in a crowded parking lot at the mall, it would be a real problem. And with the proliferation of radio scanners, you also need to prevent people from "capturing" the code that your transmitter sends. Once they have your code, they can simply re-transmit it to open your car.