Front End Discriminating Sensor
WARNING: This page is about a different car, the 1997 Pontiac Grand Am, 1997 Oldsmobile Achieva, and 1997 Buick Skylark. However, it is still accessible from the selected car via links, so may be relevant.
The front end discriminating sensor is an auxiliary sensor which assists the SDM in determining when deployment should occur by providing the SDM with an input signal. Although the front end discriminating sensor is a mechanical sensor, it is not part of the deployment loop.