2001 Mercury Grand Marquis Owner's Manuals

Check engine
Your vehicle is equipped with a
computer that monitors the engine's
emission control system. This
system is commonly known as the
On Board Diagnostics System (OBD
II). This OBD II system protects the environment by ensuring that your
vehicle continues to meet government emission standards. The OBD II
system also assists the service technician in properly servicing your
vehicle.
TheCheck Engineindicator light illuminates when the ignition is first
turned to the ON position to check the bulb. If it comes on after the
engine is started, one of the engine's emission control systems may be
malfunctioning. The light may illuminate without a driveability concern
being noted. The vehicle will usually be drivable and will not require
towing.
What you should do if the check engine light illuminates
Light turns on solid:
This means that the OBD II system has detected a malfunction.
Temporary malfunctions may cause yourCheck Enginelight to
illuminate. Examples are:
1. The vehicle has run out of fuel. (The engine may misfire or run
poorly.)
2. Poor fuel quality or water in the fuel.
3. The fuel cap may not have been properly installed and securely
tightened.
These temporary malfunctions can be corrected by filling the fuel tank
with high quality fuel of the recommended octane and/or properly
installing and securely tightening the gas cap. After three driving cycles
without these or any other temporary malfunctions present, theCheck
Enginelight should turn off. (A driving cycle consists of a cold engine
startup followed by mixed city/highway driving.) No additional vehicle
service is required.
If theCheck Enginelight remains on, have your vehicle serviced at the
first available opportunity.
CHECK
ENGINE
Instrumentation
9

Light is blinking:
Engine misfire is occurring which could damage your catalytic converter.
You should drive in a moderate fashion (avoid heavy acceleration and
deceleration) and have your vehicle serviced at the first available
opportunity.
Under engine misfire conditions, excessive exhaust temperatures
could damage the catalytic converter, the fuel system, interior
floor coverings or other vehicle components, possibly causing a fire.
Check fuel cap (if equipped)
Momentarily illuminates when the
ignition is turned to the ON position
to ensure your bulb is working.
When this light turns on, check the
fuel filler cap. Continuing to operate
the vehicle with the check fuel cap light on, can activate theService
Engine Soon/Check Enginewarning light. When the fuel filler cap is
properly re-installed, the light(s) will turn off after a period of normal
driving. This period will vary depending on driving conditions.
It may take a long period of time for the system to detect an
improperly installed fuel filler cap.
For more information, refer toFuel filler capin theMaintenance and
carechapter.
Air bag readiness
Momentarily illuminates when the
ignition is turned ON. If the light
fails to illuminate, continues to flash
or remains on, have the system
serviced immediately.
CHECK
FUEL
CAP
AIR
BAG
Instrumentation
10

Engine coolant temperature (if equipped)
Refer toEngine coolantin the
Maintenance and specifications
chapter. If light stays on or
continues to turn on after the
vehicle warms up, have your vehicle
serviced.
Never remove the coolant recovery cap while the engine is
running or hot.
Illuminates when the engine coolant temperature is high. Stop the
vehicle as soon as safely possible, switch off the engine and let it cool.
Refer toEngine coolantin theMaintenance and carechapter. If light
stays on or continues to turn on after the vehicle warms up, have your
vehicle serviced.
This light also illuminates briefly when the ignition key is turned to ON.
Safety belt
Momentarily illuminates when the
ignition is turned to the ON position
to remind you to fasten your safety
belts. For more information, refer to
theSeating and safety restraints
chapter.
Instrumentation
11

Brake system warning
²Standard instrument cluster
²Optional instrument cluster
Momentarily illuminates when the
ignition is turned to the ON position
to ensure the circuit is functional.
Also illuminates if the parking brake
is engaged. If brake warning lamp does not illuminate at these times,
seek service immediately. Illumination after releasing the parking brake
indicates low brake fluid level and the brake system should be inspected
immediately.
Anti-lock brake system (ABS) (If equipped)
Momentarily illuminates when the
ignition is turned to the ON position
to ensure the circuit is functional. If
the light does not illuminate
momentarily at start up, remains on
or continues to flash, the ABS needs to be serviced. With the ABS light
on, the anti-lock brake system is disabled and normal braking is still
effective unless the brake warning light also remains illuminated with the
parking brake released.
Turn signal
Illuminates when the left or right
turn signal or the hazard lights are
turned on. If one or both of the
indicators stay on continuously or
flash faster, check for a burned-out
turn signal bulb. Refer toBulbsin theMaintenance and carechapter.
High beams
Illuminates when the high beam
headlamps are turned on.
!
BRAKE
P!
BRAKE
ABS
Instrumentation
12

Charging system
Illuminates when the ignition is
turned to the ON position and the
engine is off. The light also
illuminates when the battery is not
charging properly, requiring
electrical system service.
Engine oil pressure (if equipped)
Illuminates when the oil pressure
falls below the normal range. Stop
the vehicle as soon as safely
possible and switch off the engine
immediately. Check the oil level and
add oil if needed. Refer toEngine oilin theMaintenance and care
chapter.
This lamp also illuminates when the ignition is turned to ON and the
engine is off.
Air suspension (if equipped)
²Standard instrument cluster
²Optional instrument cluster
Momentarily illuminates when the
ignition is turned to the ON
position. Also illuminates when the
air suspension requires repair, the
air suspension switch is OFF or the
load limit is exceeded. For
information on the air suspension system, refer to theDrivingchapter.
AIR
SUSP
CHECK
TRUNK AJAR LTR/100 kmAIR SUSPENSION
OVERDRIVE OFFDOOR
AJAR
LOW
WASHER
FLUID
km
MILES
/GAL
Instrumentation
13

O/D off
²Standard instrument cluster
²Optional instrument cluster
Illuminates when the Transmission
Control Switch (TCS), refer to
Overdrive controlin theControls
and Featureschapter, has been
pushed turning the transmission
overdrive function OFF. When the
light is on, the transmission does not operate in the overdrive mode,
refer to theDrivingchapter for transmission function and operation.
The light may also flash steadily if a transmission malfunction is
detected. If the light does not come on when the Transmission Control
Switch is depressed or if the light flashes steadily, have your vehicle
serviced as soon as possible, damage to the transmission could occur.
Traction ControlYactive (if equipped)
Flashes when the Traction Controly
system begins applying and
releasing the brakes and adjusting
the engine characteristics to limit a
wheelspin condition. It will be lit for a minimum of four seconds or for
the duration of the Traction Controlyevent.
If the Traction Controlyindicator comes on or stays lit, either:
²the Traction Controlysystem needs service, or
²the customer has disabled the system using the traction control switch
in the instrument panel.
For more information, refer to theDrivingchapter.
O/D
OFF
CHECK
TRUNK AJAR LTR/100 kmAIR SUSPENSION
OVERDRIVE OFFDOOR
AJAR
LOW
WASHER
FLUID
km
MILES
/GAL
TRAC
CNTL
Instrumentation
14

Message center indicator lights (if equipped)
Speed control
This light comes on when either the
SET/ACCEL or RESUME controls
are pressed. It turns off when the
speed control OFF control is pressed, the brake is applied or the ignition
is turned to the OFF position.
Door ajar
Illuminates when one of the doors is
not completely shut and the ignition
is turned to ON. With the ignition
ON, this light will flash six times (if
a door is open). With the ignition in
RUN position, a tone will sound for
one second (if a door is open).
Low washer fluid
Momentarily illuminates when the
ignition is turned to ON and will
stay on when the windshield washer
fluid is low.
Trunk ajar
If the trunk is not completely
closed, this light comes on when
you turn the ignition to ON. With
the ignition ON, this light will flash
five times and sound a tone for one
second, then remain on (if the trunk
is open).
SPEED CONTROL
CHECK
TRUNK AJAR LTR/100 kmAIR SUSPENSION
OVERDRIVE OFFDOOR
AJAR
LOW
WASHER
FLUID
km
MILES
/GAL
CHECK
TRUNK AJAR LTR/100 kmAIR SUSPENSION
OVERDRIVE OFFDOOR
AJAR
LOW
WASHER
FLUID
km
MILES
/GAL
CHECK
TRUNK AJAR LTR/100 kmAIR SUSPENSION
OVERDRIVE OFFDOOR
AJAR
LOW
WASHER
FLUID
km
MILES
/GAL
Instrumentation
15

Safety belt warning chime
Sounds to remind you to fasten your safety belts.
For information on the safety belt warning chime, refer to theSeating
and safety restraintschapter.
Belt minder chime
Sounds intermittently to remind you to fasten your safety belts.
For information on the safety belt minder chime, refer to theSeating
and safety restraintschapter.
Supplemental restraint system (SRS) warning chime
For information on the SRS warning chime, refer to theSeating and
safety restraintschapter.
Key-in-ignition warning chime
Sounds when the key is left in the ignition in the OFF/LOCK or ACC
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
(and the key is not in the ignition) and the driver's door is opened.
Instrumentation
16