Ram Trucks 2015 ProMaster Commercial - Owner Manual - Manual (Page 110)

If several obstacles are detected, the ParkSense® Rear
Park Assist system indicates the nearest obstacle.
The minimum height of a detectable obstacle corresponds
to the maximum height of an obstacle that would clear the
underside of the car during the parking maneuver.
ParkSense® Rear Park Assist Alerts
If an obstacle is behind the vehicle when REVERSE gear
is engaged, an audible alert is activated.
The tones emitted by the loudspeaker inform the driver
that the vehicle is approaching an obstacle. The pauses
between the tones are directly proportional to the distance
from the obstacle. Pulses emitted in quick succession
indicate the presence of a very close obstacle. A continuous
tone indicates that the obstacle is less than 12 in (30 cm)
away.
Rear Park Assist Sensors Location
108 UNDERSTANDING THE FEATURES OF YOUR VEHICLE