Front-End Discriminating Sensor
WARNING: This page is about a different car, the 2001 GMC Savana Special, 2001 GMC Savana Camper Special, 2001 GMC Savana, and 2001 Chevrolet Chevy Express. 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 Sensing and Diagnostic Module (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.