My wife is < 100 lbs. Initially when we leave the passenger airbag indicator is on (inactive.) After approx 10 mins. it will go off (activate) and stay off. I'm concerned that she is venerable during that time. The manual states that the airbag may or may not activate at 9-100 lbs. Is there any way I can force the airbag to activate at less than 100lbs?