Dodge 2010 Ram Truck Owner's Manual page 132

UNDERSTANDING THE FEATURES OF YOUR VEHICLE 131
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Rear Park Assist Disabled Slow Tone
ParkSense will indicate a detected obstacle by showing
three solid arcs and will produce a 1 ⁄ second tone. As the
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vehicle moves closer to the object the EVIC display will
show fewer arcs and the sound tone will change from
slow, to fast, to continuous.