procedures on security/anti-theft rest

What makes you thinks it's a security problem? Do you have a security indicator on or flashing when you try to start it?

yes please, the security indicator is on when i try to start it.

There isn't a whole lot that you can do yourself with this system. You can test all your fuses and maybe try a different key but anything beyond that will require a profession level scan tool, not just a DIY tool.