Chrysler pacifica hybrid 2017 Owner's Manual page 336

334 STARTING AND OPERATING
and will produce a one-half second tone. As the vehicle
moves closer to the obstacle, the display will show the
single arc moving closer to the vehicle and the sound tone
will change from slow, to fast, to continuous.
If an obstacle is detected in the left and/or right rear
region, the display will show a single flashing arc in the left
and/or right rear region and will produce a fast sound
tone. As the vehicle moves closer to the obstacle, the
display will show the single arc moving closer to the
vehicle and the tone will change from fast to continuous.
Slow Tone/Solid Arc
Single 1/2 Second Tone/Solid Arc