2011 FORD F150 differential

ignition is turned on, or remains on, have the system serviced
immediately by your authorized dealer.
Four-wheel drive high (RTT) (if
equipped):Displays when
four-wheel drive high is engaged. If
the light fails to display when the
ignition is turned on, or remains on, have the system serviced
immediately by your authorized dealer.
All-wheel drive (RTT) (if
equipped):Displays when using the
AWD system.
Electronic locking differential
(RTT) (if equipped):Displays
when using the electronic locking
differential.
Speed control (if equipped):The
speed control system indicator light
changes color to indicate what mode
the system is in:
•On (amber light):Illuminates
when the speed control system is turned on. Turns off when the speed
control system is engaged or turned off.
•Engaged (green light):Illuminates when the speed control system is
engaged. Turns off when the speed control system is disengaged.
Turn signal:Illuminates when the
left or right turn signal or the
hazard lights are turned on. If the
indicators stay on or flash faster, check for a burned out bulb.
High beams:Illuminates when the
high beam headlamps are turned on.
Key-in-ignition warning chime:Sounds when the key is left in the
ignition in the off or accessory position and the driver’s door is opened.
Headlamps on warning chime:Sounds when the headlamps or parking
lamps are on, the ignition is off (the key is not in the ignition) and the
driver’s door is opened.
4x4
HIGH
AWD
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VEHICLE NEAR TOP SPEED— Displayed when a MyKey™ is in use
and the MyKey speed limit is on and the vehicle speed is approaching
80 mph (130 km/h). Refer toMyKey™in theLocks and Security
chapter for more information.
TOP SPEED MYKEY SETTING— Displayed when a MyKey™ is in
use and the MyKey speed limit is on and the vehicle speed is 80 mph
(130 km/h). Refer toMyKey™in theLocks and Securitychapter for
more information.
BUCKLE UP TO UNMUTE AUDIO— Displayed when a MyKey™ is in
use and Belt-Minderis activated. Refer toMyKey™in theLocks and
Securitychapter for more information.
ADVTRAC ON MYKEY SETTING— Displayed when a MyKey™ is in
use when trying to disable the AdvanceTracsystem and the optional
setting is on. Refer toMyKey™in theLocks and Securitychapter for
more information.
TO STOP ALARM START VEHICLE— Displayed when the perimeter
alarm system is armed and the vehicle is entered using the key on the
driver’s side door. In order to prevent the perimeter alarm system from
triggering, the ignition must be turned to start or on before the
12 second chime expires. SeePerimeter alarm systemin theLocks and
securitychapter.
SECURITY SYSTEM FAULT— Displayed when the security system
has detected a fault. See your authorized dealer for service.
INTKEY COULD NOT PROGRAM— Displayed when an attempt is
made to program a fifth integrated key to the remote keyless entry
system. For more information on integrated key, refer to theLocks and
Securitychapter.
KEY COULD NOT PROGRAM— Displayed when an attempt is made
to program a spare key using two existing MyKeys. Refer toMyKey™in
theLocks and Securitychapter for more information.
SLOW VEHICLE TO XX MPH FOR ELD (if equipped)— Displayed
when the vehicle speed requirement for the electronic locking
differential mode has not been met.
CHECK LOCKING DIFFERENTIAL (if equipped)— Displayed
when an electronic locking differential (ELD) system fault is present. For
more information, refer toElectronic locking differential (ELD)in the
Drivingchapter.
HILL DESCENT CONTROL FAULT (if equipped)— Displayed when
a hill descent system fault is present.
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Truck Apps (if equipped)
In this mode, off-road and trailer towing application options are available.
*Off Road
Pitch and bank angle (in degrees): Displays the pitch angle (front to
rear) and bank angle (side to side) of the road surface.
Steering angle (in degrees): Displays the steering angle of the front
wheels after the vehicle has been driven for a period of time.
Differential lock/unlock: Displays the state (locked or unlocked) of the
electronic locking differential.
Torque flow: Displays the torque flow to the front and rear driveline
and operating mode of the transfer case: 4X2, 4X4 High, 4X4 Low,
AWD.
AdvanceTracsport mode, hill descent control, off-road mode: Displays
which modes are active.
* If equipped—your vehicle may be equipped with some or all of these
options.
When “Press OK for info” is displayed, pressing OK will give you
information on the following options if equipped (Note:Information is
only available when traveling less than 3 mph [5 km/h]):
•4X4 System
•AdvanceTrac
•AWD (All-Wheel Drive)
•ELD (Electronic Locking Differential)
•HDC (Hill Descent Control)
•Off-Road Mode
Trailer:Press the right arrow key (when in the Off-Road menu) to
reach the Trailer menu. The following information is displayed
•Active trailer name or default trailer
•Accumulated trailer distance
•Trailer gain and output
•Trailer disconnected (Disregard this status if your vehicle is not
equipped with a factory installed trailer brake controller. This message
may appear when an aftermarket TBC is used even when the trailer is
connected.)
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FOR 4X4 LOW APPLY BRAKE (if equipped)— Displayed when
trying to select 4X4 LOW. For more information, refer toFour-wheel
drive (4WD) operationin theDrivingchapter.
FOR 4X4 LOW SHIFT TO N (if equipped)— Displayed when 4X4
LOW is selected and the vehicle is stopped. For more information, refer
toFour-wheel drive (4WD) operationin theDrivingchapter.
FOR 4X4 LOW SLOW TO 3 MPH (if equipped)— Displayed when
4X4 LOW is selected while the vehicle is moving. For more information,
refer toFour-wheel drive (4WD) operationin theDrivingchapter.
TO EXIT 4X4 LOW APPLY BRAKE (if equipped)— Displayed when
2WD is selected from 4X4 LOW mode. For more information, refer to
Four-wheel drive (4WD) operationin theDrivingchapter.
TO EXIT 4X4 LOW SHIFT TO N (if equipped)— Displayed when
2WD is selected while the vehicle has been stopped in 4X4 LOW. For
more information, refer toFour-wheel drive (4WD) operationin the
Drivingchapter.
TO EXIT 4X4 LOW SLOW TO 3 MPH (if equipped)— Displayed
when 2WD is selected while the vehicle is operating in 4X4 LOW. For
more information, refer toFour-wheel drive (4WD) operationin the
Drivingchapter.
SHIFT DELAYED PULL FORWARD (if equipped)— May display
when shifting to or from 4X4 LOW. For more information, refer to
Four-wheel drive (4WD) operationin theDrivingchapter.
CHECK LOCKING DIFFERENTIAL (if equipped)— Displayed
when an electronic locking differential (ELD) system fault is present. For
more information, refer toElectronic locking differential (ELD)in the
Drivingchapter.
CHECK SPEED DRIVE SAFELY— Displayed when a MyKey™ is in
use and the optional setting is on and the vehicle exceeds a preselected
speed. Refer toMyKey™in theLocks and Securitychapter for more
information.
COULD NOT PROGRAM INTEGRATED KEY— Displayed when an
attempt is made to program a fifth integrated key to the remote keyless
entry system. For more information on integrated key, refer to theLocks
and Securitychapter.
ESC ALWAYS ON - MYKEY SETTING— Displayed when a MyKey™
is in use and the ESC cannot be deactivated. Refer toMyKey™in the
Locks and Securitychapter for more information.
MYKEY ACTIVE DRIVE SAFELY— Displayed when a MyKey™ is in
use. Refer toMyKey™in theLocks and Securitychapter for more
information.
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All engines
If the steering wanders or pulls equipped with either an EPS or a
hydraulic steering system, check for:
•an improperly inflated tire
•uneven tire wear
•loose or worn suspension components
•loose or worn steering components
•improper steering alignment
A high crown in the road or high crosswinds may also make the steering
seem to wander/pull.
LIMITED-SLIP AXLE (IF EQUIPPED)
This axle provides added traction on slippery surfaces, particularly when
one wheel is on a poor traction surface. Under normal conditions, the
limited-slip axle functions like a standard rear axle. The axle may exhibit
a slight noise or vibration in tight turns with low vehicle speed. This is
normal behavior and indicates the axle is working.
Electronic locking differential (ELD) axle (if equipped)
This axle provides added traction on slippery and/or off-road surfaces,
particularly when one wheel is on a poor traction surface. In normal
driving conditions the rear axle function as a standard axle. The ELD
may be locked or unlocked by the vehicle operator. Refer toFour-wheel
drive (4WD) operationsection in this chapter for further detail on ELD
function and usage. When the axle is unlocked it will function like a
standard rear axle. When the axle is locked it will not allow the rear
wheels to rotate at different speeds when turning. The ELD axle is not
recommended for use on good traction surfaces such as dry pavement.
Doing so may result in abnormal driving behavior while cornering and
excessive tire wear.
PREPARING TO DRIVE
WARNING:Utility vehicles have a significantly higher rollover
rate than other types of vehicles.
WARNING:In a rollover crash, an unbelted person is
significantly more likely to die than a person wearing a seat belt.
Driving
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FOUR-WHEEL DRIVE (4WD) OPERATION (IF EQUIPPED)
WARNING:For important information regarding safe operation
of this type of vehicle, seePreparing to drive your vehiclein
this chapter.
Four–wheel drive (4WD) supplies power to all four wheels. 4WD should
not be operated on dry pavement; driveline damage may occur.
If equipped with the electronic shift 4WD system, and 4X4 low is
selected while the vehicle is moving above 3 mph (5 km/h), the
4WD system will not perform a shift. This is normal and should be
no reason for concern.Refer toShifting to/from 4L (4X4 Low)for
proper operation.
4WD indicator lights
The indicator lights illuminate in the message center in the
reconfigurable telltale (RTT) location under the following conditions.
Refer toWarning lights and chimesin theInstrument Clusterchapter.
•4X2- Momentarily illuminates
when 2H is selected on electronic
shift 4WD systems only.
•AW D- Illuminates when AWD is
selected (all-wheel drive
equipped vehicles only).
•4X4 HIGH- Illuminates when 4H
is selected.
•4X4 LOW- Illuminates when 4L
is selected.
•
- Illuminates when the
electronic locking differential
(ELD) is selected (if equipped).
4x2
AWD
4x4
HIGH
4x4
LOW
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Note:Do not use 4H (4X4 high) on dry, hard surfaced roads. Doing so
will produce excessive noise, increased tire wear and may damage drive
components. 4H (4X4 High) is only intended for consistently slippery or
loose surfaces. Use of 4H (4X4 High) on these surfaces may produce
some noise (such as occasional clunks), but will not damage drive
components.
Shifting between 2H (4X2) and AWD (auto) or 4H (high)
Move the control from the 2H position to the AWD or 4H position at a
stop or while driving at any forward speed. The message center may
display4X4 SHIFT IN PROGRESSduring the system shift. The message
center will then display “AWD” if AWD has been selected or “4X4 high” if
4H is selected. The message center will momentarily display “4X2” if 2H
has been selected.
Note:4X4 high mode is not intended for use on dry pavement
Shifting between AWD (auto) and 4H (high)
Move the control from AWD to 4H at a stop or while driving at any
speed. The message center will display “AWD” if AWD has been selected
and “4X4 high” if 4H has been selected
Note:4X4 high mode is not intended for use on dry pavement
Electronic locking differential (ELD) (if equipped)
The electronic locking differential (ELD) is a device housed in the rear
axle which allows both rear wheels to turn at the same speed. The ELD
can provide additional traction should the vehicle become stuck. The
ELD is electronically activated by the driver and can be shifted on the
fly. It is intended for use in mud, rocks, sand, or any off-road condition
where maximum traction is needed. It is not intended for use on dry
pavement.
The ELD is affected by the following conditions:
•The 4WD control must be in either 4H (4X4 high) or 4L (4X4 low)
mode.
•The ELD will not engage if the vehicle speed is above 20 mph
(30 km/h) in 4X4 high or 56 mph (90 km/h) in 4X4 low.
•In 4H (4X4 high), the ELD will disengage at speeds above 25 mph
(40 km/h) and will automatically reengage at speeds below 20 mph
(30 km/h).
•In 4L (4X4 low), the ELD will disengage at speeds above 62 mph
(100 km/h) and will automatically reengage at speeds below 56 mph
(90 km/h).
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The ELD is designed for off-road use only and is not intended for use on
dry pavement.
Activating the electronic locking differential (ELD)
The ELD can be turned on by
pulling the knob on the 4WD control
toward you while the control is in
either 4H (4X4 high) or 4L (4X4
low) mode.
Once the knob is pulled, the
light located on the control will
blink for approximately two seconds
and then it will remain solid. The
indicator light will also display in
the message center.
Once the
light on the control
remains solid and the
indicator
light is displayed in the message
center, both rear wheel axle shafts
will be locked together providing
added traction.
If the
light blinks for 10 seconds, then turns off, and theindicator
light in the message center turns off, one of the following has occurred:
•The vehicle speed is too high.
•The left and right rear wheel speed difference is too high during an
engagement attempt.
•The system has malfunctioned and will be accompanied by aCHECK
LOCKING DIFFERENTIALmessage in the message center.
Note:If the ELD has difficulty disengaging, release the accelerator pedal
and turn the steering wheel in the opposite direction while rolling.
Driving off-road with truck and utility vehicles
4WD vehicles are specially equipped for driving on sand, snow, mud and
rough terrain and have operating characteristics that are somewhat
different from conventional vehicles, both on and off the road.
Your vehicle may be equipped with a front air dam that can become
damaged (due to reduced ground clearance) when taking your vehicle
off-road. This air dam can be taken off by removing two bolts.
Driving
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