Theft system problem

I have theft light comes on when I turn the ignition to ACC position.
The light stay on (not flashes) untill the engine start.
The owner's manual says that this light must come on when I turn key to ON pos.
Do sombody know what is mean?
May service be required?

mine stays on when it is on acc too. this should be normal

Are you shure? Cose, it was never happened before when car was new.

Yup, when it is on ACC the light stays solid. But when I start the car it goes off. It also comes on momentarily when ever you turn the ignition to on with out starting it but then it goes off.

Thank you for assistance.