1998 Mercury Grand Marquis ECU

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 good quality fuel 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.
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.
Instrumentation
7

Pressing OFF will erase the
previously programmed set speed.
To return to a previously set speed
²Press RES/RSM/RESUME. For
RES/RSM/RESUME to operate,
the vehicle speed must be faster
than 48 km/h (30 mph).
Indicator light
This light comes on when either the
SET ACC/SET ACCEL or
RES/RSM/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.
HOMELINKTUNIVERSAL TRANSMITTER (IF EQUIPPED)
The HomeLinktUniversal Transmitter, located underneath the driver's
visor, provides a convenient way to replace up to three hand-held
transmitters with a single built-in device. This feature will learn the radio
frequency codes of most current transmitters to operate garage doors
and gates, and can also control home or office lighting and security
systems (with the available accessory package).
OFF ON
COAST
RESUME
SET
ACCEL
SPEED CONTROL
Controls and features
39

Replacing lost transmitters
Take all your vehicle's transmitters
to your dealer for reprogramming if:
²a transmitter is lost or
²you want to purchase additional
transmitters (up to four may be
programmed).
SECURILOCKYANTI-THEFT SYSTEM
The SecuriLockyanti-theft system provides an advanced level of vehicle
theft protection. Your vehicle's engine can only be started with the two
special SecuriLockyelectronically coded keys provided with your
vehicle. Each time you start your vehicle, the SecuriLockykey is read
by the SecuriLockyanti-theft system. If the SecuriLockykey
identification code matches the code stored in the SecuriLocky
anti-theft system, the vehicle's engine is allowed to start. If the
SecuriLockykey identification code does not match the code stored in
the system or if a SecuriLockykey is not detected (vehicle theft
situation), the vehicle's engine will not operate.
Spare SecuriLockykeys can be purchased from your dealership and
programmed to your SecuriLockyanti-theft system. Refer to
Programming spare SecuriLockykeysfor more information.
If one or both of your SecuriLockykeys are lost or stolen and you want
to ensure the lost or stolen key will not operate your vehicle, bring your
vehicle and all available SecuriLockykeys to your dealership for
reinitialization.
Theft indicator
The theft indicator on top of the instrument panel will operate as follows:
²When the ignition is OFF, the theft indicator will flash briefly every
2 seconds to indicate the SecuriLockysystem is protecting your
vehicle.
²When the ignition is turned to RUN or START, the theft indicator will
light for 3 seconds and then go out. If the theft indicator stays on for
an extended period of time or flashes rapidly, have the system
serviced by your dealership or a qualified technician.
Controls and features
53

Programming spare SecuriLockYkeys
Spare SecuriLockykeys can be purchased from your dealership and
programmed to your SecuriLockyanti-theft system (up to a total of
8 keys). Your dealership can program your new SecuriLockykey(s) to
your vehicle or you can do it yourself using the following simple
procedure. To program a new SecuriLockykey yourself, you will need
two previously programmed SecuriLockykeys (keys that already
operate your vehicle's engine). If two previously programmed
SecuriLockykeys are not available (one or both of your original keys
were lost or stolen), you must bring your vehicle to your dealership to
have the spare SecuriLockykey(s) programmed.
Procedure to program spare SecuriLockYkeys to your vehicle
New SecuriLockykeys must have the correct mechanical key cut for
your vehicle.
Conventional (non-SecuriLocky) keyscannotbe programmed to your
vehicle.
You will need to have two previously programmed SecuriLockykeys and
the new unprogrammed SecuriLockykey readily accessible for timely
implementation of each step in the procedure. Please read and
understand the entire procedure before you begin.
1. Insert the first previously programmed SecuriLockykey into the
ignition and turn the ignition from OFF to RUN (maintain ignition in
RUN for at least one second).
2. Turn ignition to OFF and remove the first SecuriLockykey from the
ignition.
3. Within five seconds of turning the ignition to OFF, insert the second
previously programmed SecuriLockykey into the ignition and turn the
ignition from OFF to RUN (maintain ignition in RUN for at least one
second but no more than 5 seconds).
4. Turn the ignition to OFF and remove the second SecuriLockykey
from the ignition.
5. Within 10 seconds of turning the ignition to OFF, insert the
unprogrammed SecuriLockykey (new key) into the ignition and turn
the ignition from OFF to RUN (maintain ignition in RUN for at least one
second). This step will program your new SecuriLockykey.
6. If it is desired to program additional SecuriLockykey(s), repeat this
procedure from step 1.
Controls and features
54

If the programming procedure was successful, the new SecuriLocky
key(s) will start the vehicle's engine. The theft indicator (located on the
instrument panel) will light for three seconds and then go out.
If the programming procedure was not successful, the new SecuriLocky
key(s) will not operate the vehicle's engine. The theft indicator will flash
on and off. Wait at least one minute and then repeat the procedure from
step 1. If failure repeats, bring your vehicle to your dealership to have
the spare SecuriLockykey(s) programmed.
KEYLESS ENTRY SYSTEM
With the keyless entry keypad, you
can:
²lock or unlock the vehicle doors
without using the key.
²disable/enable horn chirp.
²disable/enable autolock
See alsoRemote entry systemin this chapter for more information.
Your vehicle has a factory-set 5 digit code that operates the keyless entry
system. You can also program your own 5 digit personal entry code.
The factory-set code is located:
²on the owner's wallet card in the glove compartment
²taped to the computer module
When pressing the controls on the keyless entry keypad, press the
middle of the controls to ensure a good activation.
Programming your own entry code
1. Enter the factory-set code (keypad will illuminate when pressed).
2. Press the 1/2 control within five
seconds of step 1.
3. Enter your personal 5 digit code.
Enter each digit within five seconds
of the previous one.
All of the vehicle doors will lock and unlock to confirm programming of
the new code.
Do not set a code that includes five of the same number or presents them
in sequential order. Thieves can easily figure out these types of codes.
123
45678
90
123
45678
90
Controls and features
55

When installing a child safety seat:
²Use the correct safety belt buckle
for that seating position.
²Make sure the tongue is securely
fastened in the buckle.
²Keep the buckle release button
pointing up and away from the
safety seat, with the tongue
between the child seat and the
release button, to prevent
accidental unbuckling.
²Place seat back in upright position.
²Put the safety belt in the automatic locking mode. Refer toAutomatic
locking mode.
Ford recommends the use of a child safety seat having a top tether
strap. Install the child safety seat in a seating position which is capable
of providing a tether anchorage. For more information on top tether
straps, refer toAttaching safety seats with tether straps.
Carefully follow all of the manufacturer's instructions included
with the safety seat you put in your vehicle. If you do not install
and use the safety seat properly, the child may be injured in a sudden
stop or collision.
1. Position the child safety seat in a
seat with a combination lap and
shoulder belt.
Seating and safety restraints
73

Air bag can kill or injure a child in a child seat. If you must use a
forward-facing child seat in the front seat, move seat all the way
back.
2. Pull down on the shoulder belt
and then grasp the shoulder belt
and lap belt together.
3. While holding the shoulder and
lap belt portions together, route the
tongue through the child seat
according to the child seat
manufacturer's instructions. Be sure
the belt webbing is not twisted.
4. Insert the belt tongue into the
proper buckle for that seating
position until you hear and feel the
latch engage. Make sure the tongue
is latched securely by pulling on it.
PRESS
Seating and safety restraints
74

5. To put the retractor in the
automatic locking mode, grasp the
shoulder portion of the belt and pull
downward until all of the belt is
extracted and a click is heard.
6. Allow the belt to retract. The belt will click as it retracts to indicate it
is in the automatic locking mode.
7. Pull the lap belt portion across
the child seat toward the buckle and
pull up on the shoulder belt while
pushing down with your knee on the
child seat.
8. Allow the safety belt to retract to
remove any slack in the belt.
9. Before placing the child in the
seat, forcibly tilt the seat forward
and back to make sure the seat is
securely held in place.
10. Try to pull the belt out of the retractor to make sure the retractor is
in the automatic locking mode (you should not be able to pull more belt
out). If the retractor is not locked, unbuckle the belt and repeat steps
two through nine.
Check to make sure the child seat is properly secured before each use.
Seating and safety restraints
75