Air Bag Diagnostic Unit (ADU)

ADU monitors vehicle velocity changes to detect frontal crashes which are severe enough to warrant air bag module deployment. When a frontal crash of sufficient force is detected, ADU causes current to flow through driver and passenger-side air bag modules to deploy air bags.

Additionally, ADU provides diagnostic monitoring of SIR system electrical components. When a malfunction is detected, ADU sets a Diagnostic Trouble Code (DTC) which can be retrieved using a scan tool. ADU warns driver of system malfunctions by controlling AIR BAG warning light.