This key chip is actually RFID, in fact, is a contactless swipe card system (there are also contactless swipe cards not discussed here), he is a radio frequency system, the electricity on the chip is obtained by radio frequency induction, microwave induction principle is used at high frequency, electromagnetic induction principle is used at low frequency, after induction, the chip sends its own information back.
At present, according to international standards, RFID has 900M, the distance is about 5 meters, the distance of 13M is about 20 centimeters, and the distance of 125K is about 1 centimeter. There is also a domestic standard of 433M. 125K is now only used on the car, other places are not used, is the original product, such as bus card and so on are 13M.
The old key principle you are currently trying will work, but the chip distance is not enough because the coil reader is embedded in it and your old key is out of reach. I don't know if I made myself clear.
Because the depth of the teeth above the key is different, the general car lock has about ten lock pieces, the door is generally eight lock pieces, the ignition is more than two lock pieces, the principle of the car lock is actually the same as the principle of the door lock, there are springs and lock pieces, the principle is probably through the depth of the different teeth above the key to let the lock pieces fall, so that the lock core can turn.
But you fix the door lock is also unable to drive away the car, because the ignition key there is an induction coil, the key inside a chip, when the induction coil confirms that the chip is matched, the anti-theft box will send the ignition command to the car computer, the car can start.