Principle of Operation

Principle of Operation





The Tire Deflation Warning (RPA) function is performed by the DSC Control Module. When a tire loses air pressure, the radius and dynamic rolling circumference is reduced. This increases the rotational speed as compared to the other tires on the vehicle. The RPA function measures the number of wheel revolutions from the four DSC wheel speed sensors and performs a diagonal comparison for a speed average.
If there is a difference, this is recognized as pressure loss. The RPA can inform the driver after a short drive, approximately 13 minutes, from a vehicle I speed > 10 mph via an indicator light (red) in the Instrument Cluster. I