Working mode of car key
The principle of active working mode is that the door is controlled by the body electronic module and the body control module. Just press the key button, send the unlock/lock command, and after being verified by the body electronic module, the door can be opened and closed.
The passive working mode is that when the owner enters the sensing area of the key system, as long as his hand touches the door handle, the identification key he carries will receive the low-frequency signal from the car. If the signal is consistent with the identification information stored in the key, the key will be awakened.
After the key is awakened, it will analyze the authentication password issued by the car and send out corresponding signals, which are encrypted to improve security.