5) What is smart key system? 

A smart key system includes a portable device, which is carried by a driver, and an engine start controller, which is installed in an automobile. The portable device stores an ID code unique to the portable device (ID codes differ between portable devices). The engine start controller stores an ID code (ID code of the automobile), which is the same as that of the portable device.
(or)
In smart key system, the engine start controller transmits a request signal to a first area that includes substantially the entire passenger compartment of the automobile (normal control). In response to the request signal, the portable device transmits an ID code signal including an ID code. When receiving the ID code signal, the engine start controller determines whether the ID code of the portable device and the ID code of the automobile match. When the two ID codes match, that is, when portable device verification is achieved by communication between the portable device and the engine start controller in the first area based on the normal control, the smart ignition function is validated and the starting of the engine is permitted.


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