Dodge 2014 Challenger - Owner Manual - Manual (Page 181)

The system will indicate a detected obstacle by showing
three solid arcs and will produce a one-half second tone.
As the vehicle moves closer to the obstacle the EVIC
display will show fewer arcs and the sound tone will
change from slow, to fast, to continuous.
Park Assist System Off Slow Tone
3
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 179