Ford Expedition (2018 year). Manual — part 59

Troubleshooting

Why is the feature not available (line markings are gray) when I can see the lane markings

on the road?

Vehicle speed is outside the operational range of the feature

Sun is shining directly into the camera lens

Quick intentional lane change

Staying too close to the lane marking

Driving at high speeds in curves

Previous feature activation happened within the last one second

Ambiguous lane markings (mainly in construction zones)

Rapid transition from light to dark or vice versa

Sudden offset in lane markings

ABS or AdvanceTrac activation

Camera blockage due to dirt, grime, fog, frost or water on the windshield

Driving too close to the vehicle in front of you

Transitioning between no lane markings to lane markings or vice versa

Standing water on the road

Faint lane markings (partial yellow lane markings on concrete roads)

Lane width too narrow or too wide

Camera not calibrated after a windshield replacement

Driving on tight roads or on uneven roads

Vehicle accessories such as snow plows

Why does the vehicle not come back into the middle of the lane always, as expected, in

the Aid or Aid + Alert mode?

High cross winds

Large road crown

Rough roads, grooves, shoulder drop-offs

Why does the vehicle not come back into the middle of the lane always, as expected, in

the Aid or Aid + Alert mode?

Heavy uneven loading of the vehicle or improper tire inflation pressure

If the tires have been exchanged (including snow tires), or the suspension has been
modified

Vehicle accessories such as snow plows or trailers

BLIND SPOT INFORMATION
SYSTEM

(If Equipped)

WARNINGS

Do not 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.

The system may not operate
properly during severe weather
conditions, for example snow, ice,

heavy rain and spray. Always drive with
due care and attention. Failure to take care
may result in a crash.

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The system is designed to detect vehicles
that may have entered the blind spot zone.
The detection area is on both sides of your
vehicle, extending rearward from the
exterior mirrors to approximately 13 ft
(4 m) beyond the rear bumper. The
detection area extends to approximately
59 ft (18 m) beyond the rear bumper when
the vehicle speed is greater than 30 mph
(48 km/h) to alert you of faster
approaching vehicles.

Note:

The system does not prevent contact

with other vehicles. It is not designed to
detect parked vehicles, pedestrians, animals
or other infrastructures.

Using the Blind Spot Information
System

Vehicles with Automatic Transmission

The system turns on when all of the
following occur:
•

You start your vehicle.

•

You shift into drive (D).

•

The vehicle speed is greater than
6 mph (10 km/h).

Note:

The system does not operate in park

(P) or reverse (R).

Vehicles with Manual Transmission

The system turns on when all of the
following occur:
•

You start your vehicle.

•

The vehicle speed is greater than
6 mph (10 km/h).

Note:

The system does not operate in

reverse (R).

System Lights and Messages

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When the system detects a vehicle, an
alert indicator illuminates in the exterior
mirror on the side the approaching vehicle
is coming from. If you turn the direction
indicator on for that side of your vehicle,
the alert indicator flashes.

Note:

The system may not alert you if a

vehicle quickly passes through the detection
zone.

Blocked Sensors

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The sensors are behind the rear bumper
on both sides of your vehicle.

Note:

Keep the sensors free from snow, ice

and large accumulations of dirt.

Note:

Do not cover the sensors with bumper

stickers, repair compound or other objects.

Note:

Blocked sensors could affect system

performance.

If the sensors become blocked, a message
may appear in the information display. See
Information Messages

(page 119). The

alert indicators remain illuminated but the
system does not alert you.

Blind Spot Information System
with Trailer Tow

(If Equipped)

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The system is designed to detect vehicles
that may have entered the blind spot zone
(A). The detection area is on both sides of
your vehicle and trailer, extending rearward
from the exterior mirrors to the end of your
trailer.

The system turns on when all of the
following occur:
•

You attach a trailer to your vehicle.

•

You have set up the trailer to work with
the system through the information
display.

•

You start your vehicle.

•

You shift into drive (D).

•

The vehicle speed is greater than
6 mph (10 km/h).

Note:

If you switch the Blind Spot

Information System off, the Blind Spot
Information System with Trailer Tow
automatically turns off.

Note:

If you connect a trailer to your vehicle

and do not set up the trailer through the
information display, the system turns off
and a warning message appears. See
Information Messages (page 119).

Note:

When towing a trailer, the extended

blind spot zone range decreases to a short
fixed or non-variable distance behind the
trailer. The extended blind spot zone range
returns to 59 ft (18 m) when the trailer is
disconnected.

Setting up a Trailer

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Trailer length

A

Trailer width

B

Trailer hitch ball

C

You can set-up a trailer to work with the
system through the information display.
See General Information (page 109).
When setting up a trailer, a sequence of
screens appear asking for trailer
information.

•

Select type of trailer screen -
Conventional, fifth wheel or gooseneck.

The system only supports conventional
trailers. If you select fifth wheel or
gooseneck, the system automatically turns
off.

•

Do you want to set up BLIS with trailer
screen?

If no, the system turns off.

If yes, the menu goes to the next screen.

•

Is the width less than 9 ft (2.7 m) and
length less than 33 ft (10.1 m)?

If no, the system turns off.

If yes, the menu goes to the next screen.

•

Trailer width measurement:

The width of the trailer is measured at the
front of the trailer. It is not measured at the
widest point of the trailer. The maximum
width at the front of the trailer that the
system can support is 8.5 ft (2.6 m).

Note:

You do not need to enter an exact

trailer width measurement. You only need
to confirm that the width of the trailer is
8.5 ft (2.6 m) or less.

•

Trailer length measurement:

The trailer length is the distance between
the trailer hitch ball and the rear of the
trailer. The maximum length that the
system can support is 33 ft (10.1 m).

•

Enter length of trailer:

The default setting is 18 ft (5.5 m).
Toggling up or down using the menu
buttons increases or decreases the
measurement by 3 ft (1 m). Select a length
that is equal to or within 3 ft (1 m) of the
actual measured length. For example, if
the actual measured length is 25 ft (7.6 m),
toggle the length in the menu to 27 ft
(8.2 m). When you enter the length of the
trailer, the system setup is saved.

Note:

If the trailer is actually a bike rack or

cargo rack with electrical lighting, enter a
length of 3 ft (1 m). Cross Traffic Alert
remains on for trailers with a length of 3 ft
(1 m) or less.

Note:

Proper measurement and

measurement entry is required for the
system to function as designed.