The car's key chip is a tiny integrated circuit block with no abnormal changes in memory, they call it a magnetic chip system.
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Magnetic chip systems are passive in nature.
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Memories don't change abnormally, which means they don't need electrical support, and they don't need their own super energy.
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They operate on a frequency of 125 KHZ.
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When there is no external and own energy support, its transmission range is limited, only within 1 to 15 meters.
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In many automotive chip systems, key recognition is similar.
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When a key is inserted into the ignition lock and turned to the \"on\" or \"run\" position, the reading coil of the ignition lock core will read the chip of the key; The chip has a fixed digital information, the coil will read out the digital information and anti-theft system stored digital information check, once consistent will continue the next step of vehicle launch; Otherwise, do not perform the following steps.