2004 LINCOLN NAVIGATOR brake

Roll Stability Control enhances your vehicle ’ s stability during maneuvers
that require all available tire traction, like in wet/snowy/icy road
conditions and/or when performing emergency maneuvers. In an
emergency lane-change, the driver will experience better overall vehicle
traction, and have better control of the vehicle.
The Roll Stability Control system helps the driver maintain steering
control if the vehicle begins to slide excessively left or right or spin out.
Roll Stability Control will attempt to correct the sliding motion by
applying brake force at individual tires and, if necessary, by reducing
engine power.
Driving conditions which may activate Roll Stability Control include:
• Taking a turn too fast
• Maneuvering quickly to avoid an accident, pedestrian or obstacle
• Hitting a patch of ice
• Changing lanes on a snow-rutted road
• Entering a snow-free road from a snow-covered side street, or vice
versa
• Entering a paved road from a gravel road, or vice versa
• Hitting a curb while turning
• Driving on slick surfaces
• Cornering while towing a heavily loaded trailer (refer to Trailer
Towing in this chapter)
The Roll Stability Control (RSC) system works in to further enhance the
vehicle ’ s overall stability during aggressive maneuvers. The system helps
maintain roll stability of the vehicle during aggressive maneuvers by
applying brake force to one or more wheels.
Driving conditions that may activate Roll Stability Control include:
• Emergency lane-change
• Taking a turn too fast
• Quick maneuvering to avoid an accident, pedestrian or obstacle
• Hitting a curb while turning
The Roll Stability Control system automatically turns on when the engine
is started. However, the system does not function when the vehicle is
traveling in R (Reverse) or, if equipped with four-wheel drive, in 4L (4X4
LOW). In R (Reverse) or in 4L (4X4 LOW), ABS and the traction
enhancement feature will continue to function.
2004 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus) Driving
229

The Roll Stability Control button
allows the driver to control the
availability of the Roll Stability
Control system. The Roll Stability
Control system status is indicated
by a warning indicator light with a
“ sliding car ” icon in the instrument cluster that will flash when the
system is activated and an indicator light in the control button that will
illuminate when the system is turned off. In vehicles with a message
center, the message “ Roll Stability Control OFF ” will be displayed.
If a failure is detected in the Roll Stability Control system, the warning
indicator light in the instrument cluster will stay on. If the warning
indicator light in the instrument cluster remains on while the engine is
running, have the system serviced immediately.
Pressing the button once will disable the Roll Stability Control stability
enhancement and the engine power reduction portion of the traction
enhancement feature; the brake portion of the traction enhancement
feature will still function normally. Pressing and holding the button for
more than five seconds will disable the Roll Stability Control stability
enhancement and traction enhancement feature. If the vehicle is stuck
in snow or mud or when driving in deep sand, switching off the Roll
Stability Control system may be beneficial so the wheels are allowed to
spin. If your vehicle seems to lose engine power while driving in deep
sand or very deep snow, switching off the Roll Stability Control stability
enhancement feature will restore full engine power and will enhance
momentum through the obstacle.
Some drivers may notice a slight movement of the brake pedal when the
Roll Stability Control performs a system self-check. During Roll Stability
Control operation you may experience the following:
• A rumble or grinding noise
• A slight deceleration of the vehicle
• The Roll Stability Control indicator light will flash
• If your foot is on the brake pedal, you will feel a vibration in the
pedal.
• If the driving condition is severe and your foot is not on the brake, the
brake pedal will move to apply higher brake forces. You may also hear
a whoosh of air from under the instrument panel during this severe
condition.
All these conditions are normal during Roll Stability Control operation. O
F
F
2004 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus)Driving
230

Do not alter or modify your vehicle ’ s suspension or steering; the
resulting changes to the vehicle ’ s handling can adversely affect
the Roll Stability Control system. Also, do not install a stereo
loudspeaker near the front center console or under either front
seat. The speaker vibrations can adversely affect the Roll
Stability Control sensors located in this area.
Note: Pressing the Roll Stability Control button will disable the Roll
Stability Control.
Aggressive driving in any road conditions can cause you to lose
control of your vehicle increasing the risk of severe personal
injury or property damage. The occurrence of an Roll Stability Control
event is an indication that at least some of the tires have exceeded
their ability to grip the road; this may lead to an increased risk of loss
of vehicle control, vehicle rollover, personal injury and death. If you
experience a severe road event, SLOW DOWN.
AUTOMATIC TRANSMISSION OPERATION
Brake-shift interlock
This vehicle is equipped with a brake-shift interlock feature that prevents
the gearshift lever from being moved from P (Park) when the ignition is
in the ON position unless brake pedal is depressed.
If you cannot move the gearshift lever out of P (Park) with ignition in
the ON position and the brake pedal depressed, it is possible that a fuse
has blown or the vehicle ’ s brakelamps are not operating properly. Refer
to Fuses and relays in the Roadside emergencies chapter.
If the fuse is not blown, perform the following procedure:
1. Apply the parking brake, turn the ignition to LOCK, then remove the
key.
2004 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus) Driving
231

4. Press and hold the white button
located along side the shifter
housing assembly (as shown in the
illustration). Press the gearshift
lever release on the shifter knob and
move the gearshift lever back to N
(Neutral) (two places rearward from
P [Park]).
5. Start the vehicle and release the
parking brake.
Do not drive your vehicle until you verify that the brakelamps
are working.
Always set the parking brake fully and make sure the gearshift is
latched in P (Park). Turn the ignition to the LOCK position and
remove the key whenever you leave your vehicle.
If the parking brake is fully released, but the brake warning lamp
remains illuminated, the brakes may not be working properly.
See your dealer or a qualified service technician.
Driving with a 4 – speed automatic transmission
Your vehicle ’ s automatic transmission is equipped with a special shift
strategy that insures maximum heater performance during cold weather
operation.
When ambient temperature is – 5 ° C (23 ° F) or below and the engine
coolant temperature is below 38 ° C (100 ° F), light throttle upshifts may
2004 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus) Driving
233

be slightly delayed. Once the engine coolant temperature reaches 71 ° C
(160 ° F) the normal shift strategy will resume. This is normal operation
and will not affect the function or the durability of the transmission.
If the normal shift strategy does not resume once the engine
coolant temperature reaches the normal operating temperature,
or if the downshifts and other throttle conditions do not function
normally, see your dealer or a qualified service technician as soon
as possible.
Understanding gearshift positions
To put your vehicle in gear, start the engine, depress the brake pedal,
then move gearshift lever out of P (Park).
Hold the brake pedal down while you move the gearshift lever
from P (Park) to another position. If you do not hold the brake
pedal down, your vehicle may move unexpectedly and injure someone.
P (Park)
Always come to a complete stop
before shifting into P (Park). Make
sure the gearshift lever is securely
latched in P (Park). This position
locks the transmission and prevents
the rear wheels from turning.
Always set the parking
brake fully and make sure
the gearshift is latched in P
(Park). Turn the ignition to the
LOCK position and remove the
key whenever you leave your
vehicle. P
R
N
D
2
1
O
D
2004 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus)Driving
234

R (Reverse)
With the gearshift lever in R
(Reverse), the vehicle will move
backward. Always come to a
complete stop before shifting into
and out of R (Reverse).
N (Neutral)
With the gearshift lever in N
(Neutral), the vehicle can be started
and is free to roll. Hold the brake
pedal down while in this gear.
(Overdrive)
The normal driving position for the
best fuel economy. Transmission
operates in gears one through four. P
R
N
D
2
1
O
D
P
R
N
D
2
1
O
D
P
R
N
D
2
1
O
D
2004 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus) Driving
235

CONTROL TRAC FOUR-WHEEL DRIVE (4X4) OPERATION
(IF EQUIPPED)
For important information regarding safe operation of this type
of vehicle, see Preparing to drive your vehicle in this chapter.
If equipped with the Control Trac 4x4 System, and 4L (4x4 LOW)
is selected while the vehicle is moving, the system will not
engage. This is normal and should be no reason for concern.
Before 4L (4x4 LOW) can be engaged, the vehicle must be
brought to a complete stop, the brake pedal depressed and the
transmission placed in N (Neutral).
The vehicle should not be operated in 4H (4x4 HIGH) or 4L (4x4 LOW)
on dry pavement. Doing so could result in difficult disengagement of the
transfer case, increased tire wear, decreased fuel economy and may
damage driveline components.
Your 4x4 features the heavy-duty Control Trac system which includes a
computer-operated transfer case. This unique system is interactive with
the road, continually monitoring and adjusting torque delivery to the
front and rear wheels to optimize vehicle control.
System indicator lights
The Control Trac system indicator lights illuminate only under the
following conditions. If these lights illuminate when driving in 2H or
A4WD, contact your Ford dealer as soon as possible.
• 4X4 HIGH - momentarily
illuminates when the vehicle is
started. Illuminates when 4H is
selected.
• 4X4 LOW – momentarily
illuminates when the vehicle is
started. Illuminates when 4L is
selected. 4x4
HIGH
4x4
LOW
2004 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus)Driving
240

Positions of the Control Trac system
The Control Trac system functions
in four modes:
• 2H (2WD HIGH) delivers power
to the rear wheels only. This is
appropriate for normal on-road
driving on dry pavement.
• A4WD (4X4 AUTO) provides
electronic control four-wheel
drive with power delivered to all
four wheels, as required, for
increased traction. This is appropriate for all on-road driving
conditions, such as dry road surfaces, wet pavement, snow or gravel.
• 4H (4X4 HIGH) provides mechanically locked four-wheel drive power
to front and rear wheels. The “ 4X4 ” light will illuminate in the
instrument cluster when this position is selected. This position is not
recommended for use on dry pavement. This position is only intended
for severe winter or off-road conditions, such as deep snow, ice or
shallow sand.
• 4L (4X4 LOW) provides mechanically locked four-wheel drive when
extra power at reduced speeds is required. The “ 4X4 LOW ” light will
illuminate in the instrument cluster when this position is selected.
This position is not recommended for use on dry pavement. Use this
position for off-road low-speed operation or when extra power is
required, such as climbing steep grades, going through deep sand or
pulling a boat out of the water.
Note: If your vehicle is equipped with AdvanceTrac
, the
AdvanceTrac
system will automatically turn off the stability
enhancement feature when you shift the Control Trac A4WD system into
4L (4X4 LOW). The brake traction enhancement feature will still be
enabled.
The AdvanceTrac
stability enhancement system can be turned off
manually by pressing the AdvanceTrac
button (refer to AdvanceTrac

Stability Enhancement System in this chapter) while operating in 2H,
A4WD or 4H while driving in deep sand, very deep snow or more
strenuous off-road maneuvers. This will disable the engine management
feature, allowing the vehicle to maintain full power and enhanced
momentum through the obstacle.
2004 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus) Driving
241