Yaris AIR BAG Passenger light - explanation needed

[YarisSedan]

I think the light is just to tell you that your airbag is on and activated the only time the light will go out is if you have an actual airbag light on your dash indicating a fault in the airbag system at which point you should see the airbag light on go off on your indicator on your console. When your passenger sides on the car the seat the additional light will come on to indicate that his airbag is activated as well.