2002 Mercury Mountaineer check engine

Warning messages that have been reset are divided into three categories:
•They will reappear on the display every minute from the reset.
•They will reappear on the display ten minutes from the reset.
•They will not reappear until an ignition OFF-ON cycle has been
completed.
This acts as a reminder that these warning conditions still exist within
the vehicle.
Warning display Status
Warning-tire very low (if equipped) Warning returns every
minute
Check engine temperature Warning returns after 10
minutes
Transmission overheated
Check transmission
Low fuel level
Check fuel cap
Check charging system
Low brake fluid level
Low oil pressure
Check tire pressure (if equipped) Warning returns after the
ignition key is turned from
OFF to ON. Check spare tire pressure (if equipped)
Tire pressure system fault (if equipped)
Tire pressure sensor fault (if equipped)
Check AdvanceTrac(if equipped)
Advtrac off t/c on (if equipped)
Low washer fluid level
Door ajar
Change oil soon
Oil change required
CHECK ENGINE TEMPERATURE.Displayed when the engine
coolant is overheating. Stop the vehicle as soon as safely possible, turn
off the engine and let it cool. Check the coolant and coolant level. Refer
toEngine coolantin theMaintenance and carechapter. If the warning
stays on or continues to come on, contact your dealer as soon as
possible.
Instrumentation
26

TRANSMISSION OVERHEATED.Indicates the transmission is
overheating. This warning may appear when towing heavy loads or when
driving in a low gear at a high speed for an extended period of time.
Stop the vehicle as soon as safely possible, turn off the engine and let it
cool. Refer toTransmission fluidin theMaintenance and care
chapter. If the warning stays on or continues to come on, contact your
dealer for transmission service as soon as possible.
CHECK TRANSMISSION.Indicates the transmission is not operating
properly. If this warning stays on, contact your dealer as soon as
possible.
LOW FUEL LEVEL.Displayed as an early reminder of a low fuel
condition.
CHECK FUEL CAP.Displayed when the fuel filler cap is not properly
installed. Check the fuel filler cap for proper installation. Refer toFuel
filler capin theMaintenance and carechapter.
CHECK CHARGING SYSTEM.Displayed when the electrical system is
not maintaining proper voltage. If you are operating electrical accessories
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 carechapter.
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 carechapter 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
carechapter.
CHECK TIRE PRESSURE (if equipped).Displayed when any of the
tire pressures are high or low. Refer toChecking the tire pressurein
theMaintenance and carechapter.
CHECK SPARE TIRE PRESSURE (if equipped).Displayed when the
spare tire pressure is high or low. Refer toChecking the tire pressurein
theMaintenance and carechapter.
Instrumentation
27

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 carechapter.
CHECK ADVANCETRAC(if equipped).Displayed when the
AdvanceTracsystem is not operating properly. If this message is
displayed on the message center the AdvanceTracsystem will be
partially operable. If this warning stays on while the engine is running,
contact your dealer for service as soon as possible. For further
information, refer toAdvanceTracstability enhancement systemin
theDrivingchapter.
ADVTRAC OFF T/C ON.Displayed on 4x4 vehicles only when 4x4 Low
Range is selected. In this mode, the stability enhancement portion of the
AdvanceTracis disabled, but the traction enhancement feature remains
enabled. For further information, refer toAdvanceTracstability
enhancement systemin theDrivingchapter.
DOOR AJAR.
Displayed when a door or liftgate is not completely closed.
CHANGE OIL SOON/OIL CHANGE REQUIRED.Displayed when the
engine oil life remaining is 5 percent or less. When oil life left is between
5% and 0%, the CHANGE OIL SOON message will be displayed. When oil
life left reaches 0%, the OIL CHANGE REQUIRED message will be
displayed.
An oil change is required whenever indicated by the message center.
USE ONLY RECOMMENDED ENGINE OILS.
To reset the oil monitoring system to 100% after each oil change
[approximately 8,000 km (5,000 miles) or 180 days] perform the
following:
1. Press the SETUP control to
access the System Check function.
Instrumentation
28

•Asecondkeyonthesamekeyringasthecodedkey
If any of these items are present, you need to keep these objects from
touching thecoded keywhile starting the engine. These objects and
devices cannot damage thecoded key,but can cause a momentary“no
start”condition if they are too close to the key during engine start. If a
problem occurs, turn ignition OFF and restart the engine with all other
objects on the key ring held away from the ignition key. Check to make
sure thecoded keyis an approved Mercurycoded key.
If your keys are lost or stolen you will need to do the following:
•Use your spare key to start the vehicle, or
•Have your vehicle towed to a dealership or a locksmith. The key codes
will need to be erased from your vehicle and new key codes will need
to be re-coded.
Replacing coded keys can be very costly and you may want to store an
extra programmed key away from the vehicle in a safe place to prevent
an unforeseen inconvenience.
The correctcoded keymust be used for your vehicle. The use of the
wrong type ofcoded keymay lead to a“no start”condition.
If an unprogrammed key is used in the ignition it will cause a“no
start”condition.
Programming spare keys
A maximum of eight keys can be coded to your vehicle. Only
SecuriLockkeys can be used. To program acoded keyyourself, you
will need two previously programmedcoded keys(keys that already
operate your vehicle’s engine) and the new unprogrammed key(s) readily
accessible for timely implementation of each step in the procedure.
If two previously programmed coded keys are not available, you must
bring your vehicle to your dealership to have the spare coded key(s)
programmed.
Please read and understand the entire procedure before you begin.
Controls and features
118

PREPARING TO START YOUR VEHICLE
Engine starting is controlled by the powertrain control system. This
system meets all Canadian Interference-Causing Equipment standard
requirements regulating the impulse electrical field strength of radio
noise.
When starting a fuel-injected engine, avoid pressing the accelerator
before or during starting. Only use the accelerator when you have
difficulty starting the engine. For more information on starting the
vehicle, refer toStarting the enginein this chapter.
Extended idling at high engine speeds can produce very high
temperatures in the engine and exhaust system, creating the risk
of fire or other damage.
Do not park, idle, or drive your vehicle in dry grass or other dry
ground cover. The emission system heats up the engine
compartment and exhaust system, which can start a fire.
Do not start your vehicle in a closed garage or in other enclosed
areas. Exhaust fumes can be toxic. Always open the garage door
before you start the engine. SeeGuarding against exhaust fumesin
this chapter for more instructions.
If you smell exhaust fumes inside your vehicle, have your dealer
inspect your vehicle immediately. Do not drive if you smell
exhaust fumes.
Important safety precautions
A computer system controls the engine’s idle revolutions per minute
(RPM). When the engine starts, the idle RPM runs higher than normal in
order to warm the engine. If the engine idle speed does not slow down
automatically, have the vehicle checked.
Before starting the vehicle:
1. Make sure all vehicle occupants have buckled their safety belts. For
more information on safety belts and their proper usage, refer to the
Seating and safety restraintschapter.
2. Make sure the headlamps and vehicle accessories are off.
Starting
169

To prevent electrical shock, do not use your heater with
ungrounded electrical systems or two-pronged (cheater)
adapters.
Guarding against exhaust fumes
Although odorless and colorless, carbon monoxide is present in exhaust
fumes. Take precautions to avoid its dangerous effects.
If you ever smell exhaust fumes of any kind inside your vehicle,
have your dealer inspect and fix your vehicle immediately. Do
not drive if you smell exhaust fumes. These fumes are harmful and
could kill you.
Have the exhaust and body ventilation systems checked whenever:
•the vehicle is raised for service.
•the sound of the exhaust system changes.
•the vehicle has been damaged in a collision.
WARNING:Engine exhaust, some of its constituents, and
certain vehicle components contain or emit chemicals known to
the State of California to cause cancer and birth defects or other
reproductive harm. In addition, certain fluids contained in vehicles and
certain products of component wear contain or emit chemicals known
to the State of California to cause cancer and birth defects or other
reproductive harm.
Important ventilating information
If the engine is idling while the vehicle is stopped in an open area for
long periods of time, open the windows at least 2.5 cm (one inch).
Adjust the heating or air conditioning (if equipped) to bring in fresh air.
Improve vehicle ventilation by keeping all air inlet vents clear of snow,
leaves and other debris.
Starting
173

BRAKES
Your service brakes are self-adjusting. Refer to the scheduled
maintenance guide for scheduled maintenance.
Occasional brake noise is normal and often does not indicate a
performance concern with the vehicle’s brake system. In normal
operation, automotive brake systems may emit occasional or intermittent
squeal or groan noises when the brakes are applied. Such noises are
usually heard during the first few brake applications in the morning;
however, they may be heard at any time while braking and can be
aggravated by environmental conditions such as cold, heat, moisture,
road dust, salt or mud. If a“metal-to-metal,”“continuous grinding”or
“continuous squeal”sound is present while braking, the brake linings
may be worn-out and should be inspected by a qualified service
technician.
If you are driving down a long or steep hill, shift to a lower gear.
Do not apply your brakes continuously, as they may overheat
and become less effective.
Anti-lock brake system (ABS)
On vehicles equipped with an anti-lock braking system (ABS), a noise
from the hydraulic pump motor and pulsation in the pedal may be
observed during ABS braking events. Pedal pulsation coupled with noise
while braking under panic conditions or on loose gravel, bumps, wet or
snowy roads is normal and indicates proper functioning of the vehicle’s
anti-lock brake system. The ABS performs a self-check after you start
the engine and begin to drive away. A brief mechanical noise may be
heard during this test. This is normal. If a malfunction is found, the ABS
warning light will come on. If the vehicle has continuous vibration or
shudder in the steering wheel while braking, the vehicle should be
inspected by a qualified service technician.
Driving
174

spin. If your vehicle seems to lose engine power while driving in deep
sand or very deep snow, switching off the AdvanceTracstability
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
AdvanceTracperforms a system self-check. During AdvanceTrac
operation you may experience the following:
•A rumble or grinding noise
•A slight deceleration of the vehicle
•The AdvanceTracindicator 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 AdvanceTracoperation.
Do not alter or modify your vehicle’s suspension or steering; the
resulting changes to the vehicle’s handling can adversely affect
the AdvanceTracsystem. 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 AdvanceTracevent
is an indication that at least some of the tires have exceeded their
ability to grip the road and that you may lose control of the vehicle. If
you experience a severe road event, SLOW DOWN.
If you find yourself regularly experiencing AdvanceTracevents,
you are driving too fast for conditions, you should reduce your
speed, and drive less aggressively. It is always possible to lose control
of a vehicle due to inappropriate driving habits under severe
conditions. The occurrence of an AdvanceTracevent is an indication
that at least some of the tires have exceeded their ability to grip the
road; this may cause you to lose control of the vehicle increasing the
risk of severe personal injury or property damage.
Driving
179