Front End Discriminating Sensor
WARNING: This page is about a different car, the 2002 GMC Savana and 2002 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 SDM in determining when deployment should occur by providing an input signal to SDM. Front end discriminating sensor is not part of deployment loop.