Jeep Grand Cherokee 2020 Owner's Manual page 134

132 SAFETY
NOTE:
The BSM system DOES NOT alert the driver

about rapidly approaching vehicles that are
outside the detection zones.
The BSM system detection zone DOES NOT

change if your vehicle is towing a trailer.
Therefore, visually verify the adjacent lane is
clear for both your vehicle and trailer before
making a lane change. If the trailer or other
object (i.e., bicycle, sports equipment)
extends beyond the side of your vehicle, this
may result in random false detections on the
trailer, and false chimes when the turn signal
is used.
The BSM system may experience drop outs

(blinking on and off) of the side mirror
Warning Indicator lamps when a motorcycle
or any small object remains at the side of the
vehicle for extended periods of time (more
than a couple of seconds).
The area on the rear fascia where the radar
sensors are located must remain free of snow,
ice, and dirt/road contamination so that the
BSM system can function properly. Do not block
the area of the rear fascia where the radar
sensors are located with foreign objects
(bumper stickers, bicycle racks, etc.).
Sensor Location
The BSM system notifies the driver of objects in
the detection zones by illuminating the BSM
warning light located in the outside mirrors. In
addition, when the turn signal is activated
during the alert on the side of the vehicle
corresponding to the alert, an audible (chime)
alert can be heard. During this audible (chime)
alert, the radio volume will be reduced. Refer to
"Modes Of Operation" in this section for further
information.
Warning Light Location
The BSM system monitors the detection zone
from three different entry points (side, rear,
front) while driving to see if an alert is
necessary. The BSM system will issue an alert
during these types of zone entries.