What are the reasons for the smart key not being detected?

1 Answers
VonLogan
07/30/25 5:13am
The reasons why the smart key cannot be detected: damage to the key's transmitter, damage to the car's receiver, damage to the door lock, or the battery in the key being dead. Generally, there are two types of keys with sensing functions: 1. Conventional folding mechanical keys; 2. Hidden mechanical keys. Basic components of a remote key: The system mainly consists of two parts: the transmitter and the receiver. The transmitter is composed of a transmission switch, transmission antenna, integrated circuit, etc., containing an identification code storage circuit and an amplitude modulation circuit, with a button-type lithium battery installed on the opposite side of the circuit. After the transmitter uses short-wave modulation to send out the identification code, it is received by the car's short-wave antenna and enters the short-wave high-frequency amplification processor of the receiver's electronic control unit through a distributor for demodulation, and then compared with the demodulator's identification code.
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