Front-End Discriminating Sensor
WARNING: This page is about a different car, the 2000 GMC Sierra and 2000 Chevrolet Silverado. 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. Front-end discriminating sensor is a mechanical device, and is not part of deployment loop.