Published: May 6, 2024
If you get a customer coming in and complaining that their remote keyless entry is not working, or they may have a complaint that the vehicle did not start on certain occasions, take a look at the key ring. The key ring or key fob may have two radio signals coming from it. The first one is for the remote keyless entry. This is typically in the range of 315 to 433 megahertz, and it travels pretty far to open up the doors while they’re halfway across a parking lot. The other one inside, well, it’s 125 megahertz, RFID chip. Inside this RFID chip has a copper coil wrapped around it, and that copper coil is connected to a computer chip. Also, there is an antenna or a broadcaster with another set of coils on the steering column, and those two create a signal that causes this chip to broadcast an identifier that says, Hey, this is my key that’s gonna start my vehicle.
