Driver Airbag - Function - GF91.60-P-4001-02GH

Model 163 

Fig 1: Identifying Driver Airbag Detonator

Fig 2: Identifying Restraint System Control Module

Fig 3: Identifying Deployed Airbag

The driver airbag detonator (R12/3)  located in the airbag module inflator is ignited by means of an electrical pulse generated by the restraint systems control module (N2/7)  (from 12/99) or the airbag and ETR control module (N2/2)  (to 11/99).

Operation 

1. When the triggering threshold for the driver airbag is exceeded, the restraint systems control module (N2/7) delivers an electrical ignition pulse to the detonator in the inflator.
2. The detonator then ignites the solid propellant in the inflator. When the solid propellant burns it generates a gas that flows explosively under high pressure through a filter and into the bag folded compactly on top of the inflator.
3. The bag then inflates, forcing open the steering wheel hub cover along a special split line.
4. As more gas enters the bag, it pushes through the opening and fills to maximum volume.
5. The bag reaches its full volume within approximately 45 msec.
6. It begins to deflate immediately after attaining maximum volume. The gas escapes from the airbag through a filter and the airbag collapses.