1999 Mercury Grand Marquis ECU

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 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.
CHECK
ENGINE
Instrumentation
7

3. Turn the magazine (A) over.
4. Using the disc holder release
knob (C), pull the disc holder (B)
out of the magazine.
If you pull too hard on the disc holder, the disc holder may come
completely out of the magazine. If this happens, reinsert the disc holder
back into the magazine while pressing on the lever (A).
5. Line up the CD with the groove
of the disc holder. Ensure that the
label on the CD faces downwards.
6. Press in on the disc holder until it
locks securely into the magazine. If
the disc holders are not fully locked
into the magazine, the unit will not
operate.AB
C
A
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52

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 TRANSCEIVER (IF EQUIPPED)
The HomeLinktUniversal Transceiver, located on 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, entry gates,
security systems, entry door locks, and home or office lighting.
When programming your HomeLinktUniversal Transceiver, to a
garage door or gate be sure that people and objects are out of
the way to prevent potential harm or damage.
OFF ON
COAST
RESUME
SET
ACCEL
SPEED CONTROL
Controls and features
61

Replacement of the battery willnotcause the remote transmitter to
become deprogrammed from your vehicle. The remote transmitter should
operate normally after battery replacement.
Replacing lost transmitters
Take all your vehicle's transmitters
to your dealer if service is required.
If you purchase additional
transmitters (up to four may be
programmed), perform the following
procedure:
To reprogram the transmitters
yourself, place the key in the
ignition and turn from OFF to ON
four times in rapid succession within
3 seconds. After doors lock/unlock, press any control on all transmitters
(up to four). When completed, turn the ignition to OFF.
All transmitters must be programmed at the same time.
SECURILOCKYPASSIVE ANTI-THEFT SYSTEM
Your vehicle is equipped with a coded-key anti-theft system. Only the
correct key will be able to start your vehicle. If your keys are lost or
stolen, you must take your vehicle to your dealership for key
reprogramming.
The SecuriLockypassive anti-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 SecuriLockypassive anti-theft system. If the SecuriLocky
key identification code matches the code stored in the SecuriLocky
passive 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.
The SecuriLockypassive anti-theft system is not compatible with
aftermarket remote start systems. Use of these systems may result in
vehicle starting problems and a loss of security protection. Large metallic
objects or devices such as the Mobil Speedpassyon the same key ring
as your SecuriLockykey may cause vehicle starting problems. These
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75

objects and devices cannot damage the SecuriLockykey, but can cause
a momentary problem if they are too close to the key when starting the
engine. If a problem occurs, turn ignition off and restart the engine with
all other objects on the key ring held away from the SecuriLocky
ignition key.
Spare SecuriLockykeys can be purchased from your dealership and
programmed to your SecuriLockypassive anti-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 ON 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.
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.
Controls and features
76

Each seating position in your vehicle has a specific safety belt
assembly which is made up of one buckle and one tongue that
are designed to be used as a pair. 1) Use the shoulder belt on the
outside shoulder only. Never wear the shoulder belt under the arm.
2) Never swing the safety belt around your neck over the inside
shoulder. 3) Never use a single belt for more than one person.
Combination lap and shoulder belts
1. Insert the belt tongue into the
proper buckle (the buckle closest to
the direction the tongue is coming
from) until you hear a snap and feel
it latch. Make sure the tongue is
securely fastened in the buckle.
2. To unfasten, push the release
button and remove the tongue from
the buckle.
The front and rear outboard safety restraints in the vehicle are
combination lap and shoulder belts. The front and rear seat passenger
outboard safety belts have two types of locking modes described below:
Vehicle sensitive mode
The vehicle sensitive mode is the normal retractor mode, allowing free
shoulder belt length adjustment to your movements and locking in
response to vehicle movement. For example, if the driver brakes
suddenly or turns a corner sharply, or the vehicle receives an impact of
8 km/h (5 mph) or more, the combination safety belts will lock to help
reduce forward movement of the driver and passengers.
Seating and safety restraints
85

When installing a child safety seat:
²Review and follow the information
presented in theAir Bag
Supplemental Restraint System
section in this chapter.
²Use the correct safety belt buckle
for that seating position.
²Insert the belt tongue into the
proper buckle until you hear a
snap and feel it latch. Make 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(passenger side front and outboard rear seating
positions)(if equipped).
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.
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96

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 (the buckle closest to
the direction the tongue is coming
from) for that seating position until
you hear a snap and feel the latch
engage. Make sure the tongue is
latched securely by pulling on it.
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.
Seating and safety restraints
98