Not only are they two-stage, but the stage of deployment is also determined by the positions of the front seat. There are seat position sensors so that if you have someone hugging the wheel, it can determine deployment upon the seat position.
The bags are deployed depending on deceleration. So if you hit a deer, chances are the bags will not deploy. Hit another H3 head-on, and they will deploy.
The outside sensors help the SDM determine how severe the crash is, and if extremely severe, they blow all the way at full speed. This COULD cause facial burns from the friction, and possible broken noses; however, this is mild compared to what would happen to your face if there was no air bag.
Just remember, the air bag system is called a Supplmental inflatable restraint, the seat and shoulder belts are the primary restraint system.
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Black Sheep Hummer Squadron
(ME TOO)
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