Jeep Grand Cherokee Owner's Manual page 111

Sensor Location (Driver Side Shown)
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 to sounding an
audible (chime) alert and reducing the radio volume.
Refer to "Modes Of Operation" for further information.
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 109
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.
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