Set Condition
WARNING: This page is about a different car, the 2013 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
When the Air Suspension Control Module (ASCM) monitors the pressure in the air suspension compressor line when it is pressurized. After time the pressure is checked again to see if there is any pressure loss. Any appreciable pressure loss indicates that this air line has a leak.