Conditions For Setting DTC
WARNING: This page is about a different car, the 2002 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.
DTC sets when driver-side deployment loop voltage is 426 millivolts or more for 500 milliseconds or when driver-side deployment loop resistance is 250 ohms or more for 500 milliseconds.