Old Nissan Smart Card fails to match, how to solve?

When working with old Nissan Smart card, some users often encounter the problem that the little key can match successfully, but fail to match smart card; sometimes they have to try for dozens of times or even a hundred times before succeed, or even can’t succeed.
My personal solutions share as follows:
After you try to match for many times but fail to do, remove the direction lock, then depart the aluminum section.
Nissan Solve Smart Card fails to match Nissan Solve Smart Card fails to match

Find out relays
Solve Nissan Smart Card fails to match Solve Nissan Smart Card fails to match

Pull back and forth the iron column in the center of the relays, or polish it slightly, to make it work normally.
Solve Nissan Smart Card fails to match
Put back into the car, then it can be matched.
A little part of users did not insert the little key in the correct position, then the little key fail to match and smart card fail to match either.
Wish my share can be helpful.

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