Ford 2017 FUSION Owner's Manual page 211

For automatic transmissions, the Blind
Spot Information System remains on while
the transmission is in drive (D). If shifted
into reverse (R) or park (P) the Blind Spot
Information System turns off. Once shifted
back into drive (D), the Blind Spot
Information System turns back on when
you drive your vehicle above 5 mph
(8 km/h).
For manual transmissions, the Blind Spot
Information System is on for all gears
except the reverse (R).
Note: The Blind Spot Information System
does not function in reverse (R) or park (P).
System Lights and Messages
E142442
The Blind Spot Information System
illuminates an amber alert indicator in the
outside mirror on the side of your vehicle
the approaching vehicle is coming from.
When the Blind Spot Information System
is alerting on a vehicle and the
corresponding turn signal is ON, the Blind
Spot Information System alert indicator
flashes as an increased warning level.
The alert indicator dims when the system
detects nighttime darkness.
Note: The alert indicator flashes in case of
an alert and the turn signal is set to that side
at the same time.
Fusion (CC7) Canada/United States of America, enUSA, First Printing
Driving Aids
System Sensor Blockage
To help avoid injuries, NEVER use the
Blind Spot Information System as a
replacement for using the interior
and exterior mirrors or looking over your
shoulder before changing lanes. The Blind
Spot Information System is not a
replacement for careful driving.
E205199
The system uses radar sensors that are
located behind the bumper fascia on each
side of your vehicle. Any dirt, mud and
snow in front of the sensors and/or driving
in heavy rain can cause system
degradation. Also, other types of
obstructions in front of the sensor can
cause system degradation. This is referred
to as a 'blocked' condition.
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WARNING