Jeep Wrangler: Blind Spot Monitoring (BSM) — If Equipped / Entering From The Side
Vehicles that move into your adjacent lanes
from either side of the vehicle.

Side Monitoring
The BSM system uses two radar sensors,
located inside the taillights, to detect highway
licensable vehicles (automobiles, trucks,
motorcycles, etc.) that enter the blind spot
zones from the rear/front/side of the vehicle...
Vehicles that come up from behind your vehicle
on either side and enter the rear detection zone
with a relative speed of less than 30 mph
(48 km/h)...
Other information:
This indicator shows when the
HDC
feature is turned on. The lamp will be
on solid when HDC is armed. HDC can
only be armed when the transfer case
is in the “4WD Low” position and the vehicle
speed is less then 30 mph (48 km/h). If these
conditions are not met while attempting to use
the HDC feature, the HDC indicator light will
flash on/off...
During vehicle start up, when the ParkSense
Rear Park Assist System has detected a faulted
condition, the instrument cluster display will
actuate a single chime, once per ignition cycle,
and it will display the “PARKSENSE
UNAVAILABLE WIPE REAR SENSORS” or the
“PARKSENSE UNAVAILABLE SERVICE
REQUIRED” message...