Ford F-150 2018 Owner's Manual page 256

For manual transmissions, the Blind Spot
Information System is on for all gears
except the reverse (R).
Note: For automatic transmissions, the
Blind Spot Information System does not
function in reverse (R) or park (P).
Note: The extended blind spot zone is
active at speeds above 30 mph (48 km/h).
Note: The extended blind spot zone is not
active when towing a trailer.
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.
F-150 (TFC) Canada/United States of America, enUSA, Edition date: 201705, First Printing
Driving Aids
System Sensor Blockage
E190708
The system uses radar sensors that are
located inside the tail lamp 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 and
false alerts. Also, other types of
obstructions in front of the sensor can
cause system degradation. This is a
'blocked' condition.
Note: Do not apply bumper stickers and/or
repair compound to these areas, this can
cause degraded system performance.
Note: The alert indicator may turn on during
heavy rain even though no vehicle has
entered the blind zone.
If the system detects a degraded
performance condition, a message warning
of a blocked sensor will appear in the
information display. Also, the alert
indicators remain on and the system no
longer provides any vehicle warnings. You
can clear the information display warning
but the alert indicators remain illuminated.
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