Front-End Discriminating Sensor
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 1998 GMC Savana Special, 1998 GMC Savana Camper Special, 1998 GMC Savana, 1998 Chevrolet RV Cutaway, and 1998 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Front-end discriminating sensor is an auxiliary sensor which assists SDM in determining when deployment should occur by providing an input signal. Although front-end discriminating sensor is mechanical, it is not part of deployment loop.