It is already old with the key inserted and the lock is twisted ... but the advantages and disadvantages of the "smart key"

"Smart key" has been adopted in many cars in recent years.It is a convenient system that allows you to "unlock/lock the door lock" and "start/stop the engine" just by having a key, but there is also trouble.

Here, we will explain the mechanism of the smart key, and also explain its advantages and disadvantages, and the latest smart keys.

Sentence: MR.Soran, Emsley Production Eye Catch Photo: Photo AC_HINAMALU Photo: Photo AC, Toyota

[Image gallery] Convenient, but also troubles ... advantages and disadvantages of smart keys

From "Keyless" to "Smart Key"

Before the popularity of smart keys, the key system of the car was the mainstream of the "keyless key" system.The keyless key that is unlocked/locked by remotely control by switched (Lock/Unlock) in the key is starting to be the first to be adopted in the country in Honda's third generation "Accord" released in 1985., It spreads as a relatively inexpensive electronic key.

The "smart key" system developed the keyless key system.With the keys in your pockets or bags, you can unlock/lock by approaching/separated from the car, or touching the doorknob (switch).can.For the first time in Japan, the third generation of Toyota's third generation, Celsior, appeared in 2000.Since then, it has rapidly spread not only in luxury cars but also in small cars and mini cars, and has been up to the present.

The name, system configuration, and operation method of the smart key system vary slightly depending on the manufacturer.For example, Toyota is called "Smart Entry & Start", Nissan is "Intelligent Key", and Honda is "Honda Smart Key".

Unlock/lock by collation of ID code

In the smart key system, the car and the smart key have built -in transmitter and receiver to recognize each other's radio waves.In addition, the car has the core of control, "Collection ECU", which checks the adjustment of the smart key and the ID code between the vehicle and the smart key position, and controls the "body ECU" and "engine ECU".

Locking the door lock ・ When locking, ・ The person who carried the smart key to the door 1-11.When approaching the distance within 5m, the weak radio waves sent from the outdoor antenna are accepted by the smart key, reply to the car from the smart key to the car.Or, even when unlocking or locking when touching the doorknob (switch), if the user is distinguished from a certain distance from the car or touches the doorknob (switch), if it matches the ID, lock it.

At the start of the engine, the shift position is parking (p) or neutral (n) position, and the brake pedal is stepped on. ・ When the start button is pressed, ID collation between vehicles and smart keys.If it matches, the engine starts

The next page is: the advantages and disadvantages of smart keys

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