2003 FORD EXPLORER brake sensor

when the engine is idling at a low speed, turn off as many of the
electrical loads as possible. If the warning stays on or comes on when the
engine is operating at normal speeds, have the electrical system checked
as soon as possible.
LOW BRAKE FLUID LEVEL.Indicates the brake fluid level is low and
the brake system should be inspected immediately. Refer toChecking
and adding brake fluidin theMaintenance and specifications
chapter.
LOW OIL PRESSURE.Displayed when the engine oil level is low. If
this warning message is displayed, check the level of the engine oil.
Refer toEngine oilin theMaintenance and specificationschapter for
information about adding engine oil.
WARNING-TIRE VERY LOW (if equipped).Displayed when one or
more tires have very low pressure. When this warning message is
displayed, a warning chime will sound reminding you to stop the vehicle
as soon as safely possible and check your tires for proper pressure, leaks
and damage. Refer toServicing your tiresin theMaintenance and
specificationschapter.
CHECK TIRE PRESSURE (if equipped).Displayed when any of the
tire pressures are low. Refer toChecking the tire pressurein the
Maintenance and specificationschapter.
CHECK SPARE TIRE PRESSURE (if equipped).Displayed when the
spare tire pressure is low. Refer toChecking the tire pressurein the
Maintenance and specificationschapter.
TIRE PRESSURE SYSTEM FAULT (if equipped).Displayed when
the Tire pressure monitoring system is malfunctioning. If the warning
stays on or continues to come on, have the system checked by your
dealer.
TIRE PRESSURE SENSOR FAULT (if equipped).Displayed when a
Tire pressure sensor is malfunctioning. If the warning stays on or
continues to come on, have the system checked by your dealer.
LOW WASHER FLUID LEVEL.Indicates the washer fluid reservoir is
less than one quarter full. Check the washer fluid level. Refer to
Windshield washer fluidin theMaintenance and specifications
chapter.
CHECK ADVANCETRAC
(if equipped).Displayed when the
AdvanceTrac
system is not operating properly. If this message is
displayed on the message center the AdvanceTrac
system will be
partially operable. If this warning stays on while the engine is running,
Driver Controls
70

To reset the oil monitoring system to your personalized oil life %:
1. Press the SETUP control to
access the System Check function.
2. Press and release the RESET
control to display“OIL LIFE XX%
HOLD RESET NEW”.
3. Press and hold the RESET
control for 2 seconds to display“IF
NEW OIL HOLD RESET”.
4. Release the RESET control
momentarily, then press RESET and
SETUP controls at the same time to
activate a service mode which will
display OIL LIFE XX% RESET TO
ALTER.
5. Press RESET until you find your personalized OIL LIFE XX%.
6. With your personalized OIL LIFE XX% displayed, press SETUP to
continue the system check.
DATA ERR.These messages indicate improper operation of the vehicle
network communication between electronic modules.
•Fuel computer
•Oil life
•Charging system
•Door sensor•Washer fluid
•Brake fluid
•Compass
•Outside temperature
•Engine sensor
Contact your dealer as soon as possible if these messages occur on a
regular basis.
Driver Controls
72

indicator light in the instrument cluster remains on while the engine is
running, have the system serviced immediately.
Pressing the control once will disable the AdvanceTrac
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 control for
more than five seconds will disable the AdvanceTrac
stability
enhancementandtraction enhancement feature. If the vehicle is stuck
in snow or mud or when driving in deep sand, switching off the
AdvanceTrac
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 AdvanceTrac
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
AdvanceTrac
performs a system self-check. During AdvanceTrac

operation you may experience the following:
•A rumble or grinding noise
•A slight deceleration of the vehicle
•The AdvanceTrac
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 AdvanceTrac
operation.
Do not alter or modify your vehicle’s suspension or steering; the
resulting changes to the vehicle’s handling can adversely affect
the AdvanceTrac
system. Also, do not install a stereo
loudspeaker near the rear console or either rear seat. The
speaker vibrations can adversely affect the AdvanceTrac

sensors located in this area.
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 AdvanceTrac
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.
Driving
141

The fuses are coded as follows:
Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse Panel
Description
1 30A Memory seat module, Driver power seat
2 20A Heated seats, Moonroof
3 20A Radio, Amplifier, DVD
4 5A Front wiper module
5 15A Flasher relay (Turn, hazards)
6 10A Right horn
7 15A Heated mirrors
8–Not used (spare)
9–Not used (spare)
10 10A Heated backlight relay coil, Heated seat
module, A/C clutch contact
11—Not used (spare)
12 5A 4x4 module
13 5A Overdrive cancel switch, Flex fuel sender
14 5A PATS module
15 5A Rear wiper module, Cluster, TPMS
16 5A Power mirror, Manual climate control, TPMS
17 15A Delayed acc. coil, Battery saver, Glove
compartment lamp, 2nd row courtesy lamps
18 10A Left horn
19 10A RCM
20 5A Driver seat switch, Memory switch, Driver
seat module, BSM, Sunload sensor
21 5A Instrument cluster, Compass, Flasher coil
22 10A ABS, IVD Controller
23 15A Brake pedal position switch, Driver brake
applied relay, Redundant cruise deactivate
switch
24 15A Cigar lighter, OBD II
25 5A Mode-Temperature actuator for auxiliary
climate control, Trailer tow battery charge coil
Roadside Emergencies
181

Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse Panel
Description
26 7.5A Park aid, Brake shift interlock, Approach lamp
relay coil, IVD switch
27 7.5A Electrochromatic mirror, Digital transmission
range sensor - backup lamps
28 5A Radio (Start)/DVD (Start)
29 10A Digital transmission range sensor, PWR feed
to fuse #28 (Start feed)
30 5A Daytime Running Lamps (DRL), Remote
solenoid, DEATC climate controller, Manual
climate control, Manual climate control temp
blend actuator
Passenger compartment fuse panel (top side)
These relays are located on the reverse side of the passenger
compartment fuse panel. See your dealer or a certified technician for
service of this relay box.
Roadside Emergencies
182

The relays are coded as follows:
Fuse/Relay Location Description
Relay 64 AdvanceTrac
relay
Relay 65 Open
Relay 66 Open
CHANGING THE TIRES
If you get a flat tire while driving:
•do not brake heavily.
•gradually decrease the vehicle’s speed.
•hold the steering wheel firmly.
•slowly move to a safe place on the side of the road.
The use of tire sealants is not recommended and may
compromise the integrity of your tires. The use of tire sealants
may also affect your tire pressure monitoring system (if equipped).
If your vehicle is equipped with a tire pressure monitoring
system, refer toTire Pressure Monitoring System (if
equipped)in theMaintenance and specificationssection for
important information. If the tire pressure monitor sensor becomes
damaged, it will no longer function.
Spare tire information
The spare tire can be used as a spare or a regular tire and is identical to
the other tires on your vehicle.
If your vehicle is equipped with AWD, a spare tire of a different
size than the road tires should not be used. Such a tire could
make the vehicle difficult to control as well as result in damage to
driveline components.
Roadside Emergencies
188

Changing tires with TPMS
It is recommended that you always
have your tires serviced by a dealer
or qualified technician.Each tire is
equipped with a tire pressure
sensor mounted on the wheel
inside the tire behind the valve
stem. The tire pressure sensor
must be unbolted from the wheel prior to tire removal. The
sensor can be removed by loosening the nut at the valve stem.
Failure to remove the sensor may damage it.The rubber grommet
(washer) between the wheel and the tire pressure sensor needs to be
replaced when any tire is changed to minimize air leaks.
The tire pressure should be checked periodically (at least monthly) using
a tire gauge, refer toChecking the tire pressurein this chapter.
USING SNOW TIRES AND TRACTION DEVICES
Snow tires must be the same size and grade as the tires you
currently have on your vehicle.
The tires on your vehicle have all-weather treads to provide traction in
rain and snow. However, in some climates, using snow tires or traction
devices may be necessary. Ford offers tire cables as a Ford approved
accessory and recommends use of these or SAE class“S”tire cables. See
your dealer or qualified service technician for more information on tire
cables for your vehicle.
Follow these guidelines when using snow tires and traction devices:
•Cables or chains should only be used on the rear wheels.
•Install cables or chains securely, verifying that the cables or chains do
not touch any wiring, brake lines or fuel lines.
•Drive cautiously. If you hear the cables or chains rub or bang against
the vehicle, stop and retighten them. If this does not work, remove the
cables or chains to prevent vehicle damage.
•Avoid overloading your vehicle.
•Remove the cables or chains when they are no longer needed.
•Do not use cables or chains on dry roads.
•Do not exceed 48 km/h (30 mph) with tire cables or chains on your
vehicle.
Maintenance and Specifications
253