2021 FORD F-53 sensor

The sensor is mounted on the bumper
A message displays if something obstructs
the radar signals from the sensor. The
sensor is in the lower grille. The system
cannot detect a vehicle ahead and does
not function when something blocks the
sensor.
Note:
You cannot see the sensor. It is
behind a fascia panel.
Keep the front of your vehicle free of dirt,
metal badges or objects. Vehicle front
protectors and aftermarket lights may also
block the sensor.
Possible Causes and Actions for This Message Displaying: Action
Cause
Clean the grille surface in front of the radar
or remove the object causing the obstruc-
tion.
The surface of the radar is dirty or
obstructed.
Wait a short time. It may take several
minutes for the radar to detect that it is free
from obstruction.
The surface of the radar is clean, but the
message remains in the display.
Do not use the system in these conditions
because it may not detect any vehicles
ahead.
Heavy rain or snow is interfering with the
radar signals.
Do not use the system in these conditions
because it may not detect any vehicles
ahead.
Water, snow or ice on the surface of the
road may interfere with the radar signals.
Wait a short time or switch to normal cruise
control.
You are in a desert or remote area with no
other vehicles and no roadside objects.
Due to the nature of radar technology, it is possible to get a blockage warning with no
actual block. A false blocked condition either self clears, or clears after you restart your
vehicle.
67
2021 Motorhome (TY3) Canada/United States of America, enUSA, Edition date: 202010, Second-Printing Cruise ControlE325712

DRIVER ALERT (IF EQUIPPED)
WARNING: You are responsible for
controlling your vehicle at all times. The
system is designed to be an aid and does
not relieve you of your responsibility to
drive with due care and attention. Failure
to follow this instruction could result in
the loss of control of your vehicle,
personal injury or death. WARNING:
The system may not
function if the sensor is blocked. WARNING:
Take regular rest
breaks if you feel tired. Do not wait for
the system to warn you. WARNING:
Certain driving styles
may result in the system warning you
even if you are not feeling tired. WARNING:
In cold and severe
weather conditions the system may not
function. Rain, snow and spray can all
limit sensor performance. WARNING:
The system will not
operate if the sensor cannot track the
road lane markings. WARNING:
If damage occurs in the
immediate area surrounding the sensor,
have your vehicle checked as soon as
possible. WARNING:
The system may not
correctly operate if your vehicle is fitted
with a suspension kit not approved by
us. The system automatically monitors your
driving behavior using various inputs
including the front camera sensor.
If the system detects that your driving
alertness is reduced below a certain
threshold, the system will alert you using
a tone and a message in the information
display.
Note:
Keep the windshield free from
obstructions. For example, bird droppings,
insects and snow or ice.
Note: If the camera is blocked or if the
windshield is damaged, the system may not
function.
Note: The system remembers the last
setting when you start your vehicle, unless
a MyKey ™ is detected.
Note: If enabled in the menu, the system
activates at speeds above
40 mph
(64 km/h).
Using Driver Alert
Switching the System On and Off
You may switch the system on or off
through the information display by
selecting Settings, then Driver Assist, and
then Driver Alert in the menu. When
activated, the system will monitor your
alertness level based upon your driving
behavior in relation to the lane markings,
and other factors.
69
2021 Motorhome (TY3) Canada/United States of America, enUSA, Edition date: 202010, Second-Printing Driving AidsE243054

System Warnings
The warning system is in two stages. At
first the system issues a temporary warning
that you need to take a rest. This message
will only appear for a short time. If the
system detects further reduction in driving
alertness, another warning may be issued
which will remain in the information display
for a longer time. Press OK on the steering
wheel control to clear the warning. When
active, the system will run in the
background and only issue a warning if
required.
Note:
The system will not issue warnings
below approximately 40 mph (64 km/h).
Resetting the System
You can reset the system by either:
• Switching the ignition off and on.
• Stopping the vehicle and then opening
and closing the driver door.
LANE KEEPING SYSTEM
(IF
EQUIPPED) WARNING: You are responsible for
controlling your vehicle at all times. The
system is designed to be an aid and does
not relieve you of your responsibility to
drive with due care and attention. Failure
to follow this instruction could result in
the loss of control of your vehicle,
personal injury or death. WARNING:
Always drive with due
care and attention when using and
operating the controls and features on
your vehicle. WARNING:
In cold and severe
weather conditions the system may not
function. Rain, snow and spray can all
limit sensor performance. WARNING:
The system will not
operate if the sensor cannot track the
road lane markings. WARNING:
The sensor may
incorrectly track lane markings as other
structures or objects. This can result in
a false or missed warning. WARNING:
Large contrasts in
outside lighting can limit sensor
performance. WARNING:
The system may not
operate properly if the sensor is blocked.
Keep the windshield free from
obstruction. WARNING:
If damage occurs in the
immediate area surrounding the sensor,
have your vehicle checked as soon as
possible. WARNING:
The system may not
correctly operate if your vehicle is fitted
with a suspension kit not approved by
us.
Note: The system works as long as the
camera can detect one lane marking at a
speed above
40 mph (64 km/h).
Note: The system may not function with a
blocked camera, or if the windshield is
damaged or dirty. 70
2021 Motorhome (TY3) Canada/United States of America, enUSA, Edition date: 202010, Second-Printing Driving AidsE243054

Note:
We recommend that you switch the
system off if you install a snow plow or
similar object in such a way that it may
block the radar sensor. Your vehicle
remembers the selected setting across key
cycles.
Blocked Sensors Camera.
1
Radar sensor.
2 If a message regarding a blocked sensor
or camera appears in the information
display, the radar signals or camera images
are obstructed. With a blocked sensor or
camera, the Pre-Collision Assist system
may not function, or performance may
reduce. The following table lists possible
causes and actions for when this message
displays.
Camera Troubleshooting Action
Cause
Clean the outside of the windshield in frontof the camera.
The windshield in front of the camera is
dirty or obstructed in some way.
Wait a short time. It may take several
minutes for the camera to detect that there is no obstruction.
The windshield in front of the camera is
clean but the message remains in the display screen.
76
2021 Motorhome (TY3) Canada/United States of America, enUSA, Edition date: 202010, Second-Printing Driving AidsE310579

Radar Troubleshooting
Action
Cause
Clean the grille surface in front of the radaror remove the object causing the obstruc- tion.
The surface of the radar in the grille is dirty
or obstructed in some way.
Wait a short time. It may take several
minutes for the radar to detect that there is no obstruction.
The surface of the radar in the grille is clean
but the message remains in the display screen.
The Pre-Collision Assist system is tempor-
arily disabled. Pre-Collision Assist automat-ically reactivates a short time after the weather conditions improve.
Heavy rain, spray, snow or fog is interfering
with the radar signals.
The Pre-Collision Assist system is tempor-
arily disabled. Pre-Collision Assist automat-ically reactivates a short time after the weather conditions improve.
Swirling water or snow or ice on the surface
of the road may interfere with the radar signals.
Contact an authorized dealer to have theradar checked for proper coverage and operation.
Radar is out of alignment due to a front end
impact.
Note: Proper system operation requires a
clear view of the road by the camera. Have
any windshield damage in the area of the
camera's field of view repaired.
Note: If something hits the front end of your
vehicle or damage occurs and your vehicle
has a radar sensor, the radar sensing zone
may change. This could cause missed or
false vehicle detections. Contact an
authorized dealer to have the radar checked
for proper coverage and operation.
Note: If your vehicle detects excessive heat
at the camera or a potential misalignment
condition, a message may display in the
information display indicating temporary
sensor unavailability. When operational
conditions are correct, the message
deactivates. For example, when the ambient
temperature around the sensor decreases
or the sensor automatically recalibrates
successfully.
77
2021 Motorhome (TY3) Canada/United States of America, enUSA, Edition date: 202010, Second-Printing Driving Aids

Protected Component
Fuse
Rating
Fuse
Number
Not used.
—
8
Not used.
—
9
Not used.
—
10
Not used.
—
11
Brake on-off switch.
7.5 A
12
Smart datalink connector.
7.5 A
13
Not used (spare).
15 A
14
Not used (spare).
15 A
15
Not used.
—
16
Not used.
7.5 A
17
Yaw sensor.
7.5 A
18
Telematics control unit module.
5 A
19
Ignition switch.
5 A
20
Not used.
5 A
21
Not used (spare).
5 A
22
Not used (spare).
30 A
23
Not used (spare).
30 A
24
Not used (spare).
20 A
25
Not used (spare).
30 A
26
Not used (spare).
30 A
27
Not used (spare).
30 A
28
Not used (spare).
15 A
29
Brake on-off signal to 14A348.
5 A
30
Instrument cluster.
10 A
31
Steering column control module.
Not used (spare).
20 A
32
Not used.
—
33
110
2021 Motorhome (TY3) Canada/United States of America, enUSA, Edition date: 202010, Second-Printing Fuses

When changing the air filter element, use
only the air filter element listed. See
Capacities and Specifications (page
152).
Note: Failure to use the correct air filter
element may result in severe engine
damage. The customer warranty may be
void for any damage to the engine if you do
not use the correct air filter element.
Note: It may be necessary to loosen the
worm gear clamp connecting the air cleaner
to the clean air duct, disconnect the duct
from the air cleaner, disconnect the mass
air flow sensor electrical wiring harness
connector from the cover, and partially
dismount the air cleaner cover and tray from
the rubber grommets on the bracket to
service the air cleaner. 1. Loosen the latches that secure the air
filter cover in place.
2. Carefully separate the two halves of the air filter housing.
3. Remove the air filter element from the
housing.
4. Wipe any dirt or debris from the air filter
housing and cover. 5. Install a new air filter element.
6. Replace the air filter cover to the
housing and secure the latches. Be
careful not to crimp the filter element
edges between the air filter housing.
This could cause filter damage and
allow unmetered air to enter the engine
if not properly seated.
ENGINE COOLANT CHECK WARNING:
Do not remove the
coolant reservoir cap when the engine is
on or the cooling system is hot. Wait 10
minutes for the cooling system to cool
down. Cover the coolant reservoir cap
with a thick cloth to prevent the
possibility of scalding and slowly remove
the cap. Failure to follow this instruction
could result in personal injury. WARNING:
Do not put coolant in
the windshield washer reservoir. If
sprayed on the windshield, coolant could
make it difficult to see through the
windshield. WARNING:
To reduce the risk of
personal injury, make sure the engine is
cool before unscrewing the coolant
pressure relief cap. The cooling system
is under pressure. Steam and hot liquid
can come out forcefully when you loosen
the cap slightly. WARNING:
Do not add coolant
further than the MAX mark.
When the engine is cold, check the
concentration and level of the coolant at
the intervals listed in the scheduled
maintenance information. See Scheduled
Maintenance
(page 168).
118
2021 Motorhome (TY3) Canada/United States of America, enUSA, Edition date: 202010, Second-Printing MaintenanceE313332