What is the method for reprogramming a car key?
2 Answers
It is best to go to a 4S dealership or a professional car lock service company for reprogramming. The basic components of a remote key consist of the following two points: 1. Transmitter: Composed of a transmission switch, transmission antenna, integrated circuit, etc., it contains an identification code storage circuit and an amplitude modulation circuit, with a button-type lithium battery installed on the opposite side of the circuit. The transmission frequency uses radio waves, and pressing the transmission switch button once sends a signal; 2. Receiver: After the transmitter sends the identification code using shortwave modulation, it is received by the car's shortwave antenna and processed through a distributor into the shortwave high-frequency amplification processor of the receiver's electronic control unit for demodulation, where it is compared with the demodulator's identification code.
I've experienced car key reprogramming several times, after all, I've been driving for twenty years. There are several common methods: for older cars, you might just need to insert the key into the ignition cylinder and turn it quickly a few times, or pair the new key's serial number; newer cars are different, like some smart keys, you'll need to connect a programming tool to the OBD port, and sometimes you'll have to operate the steering wheel buttons or the center console. I've tried DIY myself, but I really don't recommend messing around, because if you get the procedure wrong, the car's anti-theft system might lock up, and you'll end up spending a lot of money at the dealership. Reprogramming a new key is usually because the old one was lost or the remote stopped working, and it generally takes less than half an hour to complete, with costs ranging from a hundred to several thousand yuan, depending on the complexity of the car model. Remember, check the manual or online tutorials before you try anything, don't rush into it.
