Jeep Grand Cherokee Operating Information Manual page 80

Entering From The Rear
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).
Rear Monitoring
Overtaking Traffic
If you pass another vehicle slowly with a relative
speed less than 10 mph (16 km/h) and the
vehicle remains in the blind spot for approxi-
mately 1.5 seconds, the warning light will be
illuminated. If the difference in speed between
the two vehicles is greater than 10 mph
(16 km/h), the warning light will not illuminate.
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Overtaking/Approaching
Overtaking/Passing
The BSM system is designed not to issue an
alert on stationary objects such as guardrails,
posts, walls, foliage, berms, etc. However, oc-
casionally the system may alert on such ob-
jects. This is normal operation and your vehicle
does not require service.
Stationary Objects
The BSM system will not alert you of objects
that are traveling in the opposite direction of the
vehicle in adjacent lanes.