1999 CADILLAC ELDORADO ignition

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2-66 Malfunction Indicator Lamp
(Service Engine Soon Light)
Your vehicle is equipped
with a computer which
monitors operation of the
fuel, ignition and emission
control systems.
This system is called OBD II (On
-Board
Diagnostics
-Second Generation) and is intended to assure
that emissions are at acceptable levels for the life of the
vehicle, helping to produce a cleaner environment. The
SERVICE ENGINE SOON light comes on and a chime
will sound to indicate that there is a problem and service
is required. Malfunctions often will be indicated by the
system before any problem is apparent. This may prevent
more serious damage to your vehicle. This system is also
designed to assist your service technician in correctly
diagnosing any malfunction.
NOTICE:
If you keep driving your vehicle with this light
on, after a while, your emission controls may not
work as well, your fuel economy may not be as
good and your engine may not run as smoothly.
This could lead to costly repairs that may not be
covered by your warranty.
NOTICE:
Modifications made to the engine, transaxle,
exhaust or fuel system of your vehicle or the
replacement of the original tires with other than
those of the same Tire Performance Criteria
(TPC) can affect your vehicle's emission controls
and may cause the SERVICE ENGINE SOON
light to come on. Modifications to these systems
could lead to costly repairs not covered by your
warranty. This may also result in a failure to pass
a required Emission Inspection/Maintenance test.

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This light should come on, as a check to show you it is
working, when the ignition is on and the engine is not
running. If the light doesn't come on, have it repaired.
This light will also come on during a malfunction in one
of two ways:

Light Flashing
-- A misfire condition has been
detected. A misfire increases vehicle emissions and
may damage the emission control system on your
vehicle. Dealer or qualified service center diagnosis
and service may be required.

Light On Steady
-- An emission control system
malfunction has been detected on your vehicle.
Dealer or qualified service center diagnosis and
service may be required.
If the Light Is Flashing
The following may prevent more serious damage to
your vehicle:

Reducing vehicle speed.

Avoiding hard accelerations.

Avoiding steep uphill grades.

If you are towing a trailer, reduce the amount of
cargo being hauled as soon as it is possible.If the light stops flashing and remains on steady, see ªIf
the Light Is On Steadyº following.
If the light continues to flash, when it is safe to do so,
stop the vehicle. Find a safe place to park your vehicle.
Turn the key off, wait at least 10 seconds and restart the
engine. If the light remains on steady, see ªIf the Light
Is On Steadyº following. If the light is still flashing,
follow the previous steps, and drive the vehicle to your
dealer or qualified service center for service.
If the Light Is On Steady
You may be able to correct the emission system
malfunction by considering the following:
Did you recently put fuel into your vehicle?
If so, reinstall the fuel cap, making sure to fully install
the cap. See ªFilling Your Tankº in the Index. The
diagnostic system can determine if the fuel cap has been
left off or improperly installed. A loose or missing fuel
cap will allow fuel to evaporate into the atmosphere. A
few driving trips with the cap properly installed should
turn the light off.
Did you just drive through a deep puddle of water?
If so, your electrical system may be wet. The condition
will usually be corrected when the electrical system
dries out. A few driving trips should turn the light off.

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NOTICE:
Damage to your engine from neglected oil
problems can be costly and is not covered by
your warranty.
Fuel Gage
The fuel gage shows
approximately how much
fuel is in the tank. It works
only when the ignition is
in RUN.Here are a few concerns some owners have had about
the fuel gage. All of these situations are normal and do
not indicate that anything is wrong with the fuel gage.

At the gas station the gas pump shuts off before the
gage reads F.

It takes more (or less) gas to fill the tank than the
gage said. For example, the gage read half a tank, but
it took more (or less) than the tank's remaining
capacity to fill it.

The gage may change when you turn, stop or
speed up.
Fuel Data Display
Everything you need to know about the fuel economy
and how far you can travel with your vehicle's
remaining fuel is displayed. Fuel data can be obtained
by pressing the SKIP INFO button. See ªDIC Controls
and Displaysº later in this section.

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Driver Information Center (DIC)
This display gives you the status of many of your
vehicle's systems. The DIC is also used to display driver
personalization features and warning/status messages.
DIC Controls and Displays
YES TRIP RESET: By using this button, you can tell
how far you've gone since you last set the YES TRIP
RESET back to zero. To reset, press and hold this
button until zeros appear. If your vehicle is domestic,
the trip odometer will return to zero after 999.9 miles
(1 609 km). If your vehicle is Canadian, the trip
odometer will return to zero after 1 999.9 km
(1,242 miles).NO INFO RESET: Pressing this button will reset the
MPG AVG, GAL FUEL USED, AVG MPH, TIMER,
OIL LIFE LEFT and ENGLISH/METRIC RESET.
Pressing NO INFO RESET when a non
-resettable
display appears will cause a ªrecallº mode to occur.
When this happens, all Driver Information Center (DIC)
warning messages that have been displayed since the
ignition key was turned to RUN will redisplay. If no
messages were displayed, a MONITORED SYSTEMS
OK message will appear.
SKIP INFO: Pressing this button repeatedly will
display the RANGE, MPG AVG, MPG INST, GAL
FUEL USED, AVG MPH, TIMER, BATTERY VOLTS,
OIL LIFE LEFT and ENGLISH/METRIC RESET.
FUEL DOOR: Press this button to open the fuel
door. (This feature will work only when the shift lever
is in PARK (P) regardless of whether or not the vehicle
is running.)
TRUNK: Press this button to open the trunk.
(This feature will work only when the shift lever is
in PARK (P) regardless of whether or not the vehicle
is running.)
MPG AVG (Reset): Press the SKIP INFO button
to display the MPG AVG (Average Fuel Economy),
then press and hold the NO INFO RESET button until
0.0 MPG AVG is displayed.

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CHECK BRAKE FLUID LEVEL - 37: This message
will display if the ignition is in RUN to inform the
driver that the brake fluid level is low. Check the brake
reservoir level and add fluid as needed. Have the brake
system serviced by a technician as soon as possible. If
the brake warning light is on, follow the directions in
that part.
CHECK COOLANT LEVEL
- 2: This message
will appear when there is a low level of engine coolant.
Have the cooling system serviced by a technician as
soon as possible.
CHECK FUEL GAUGE
- 39: This message
will appear when the fuel supply is less than 4 gallons
(15.2 L) and the display is turned off (digital clusters
only). A single chime will also sound when this message
is displayed.
CHECK GAS CAP
- 61: This message will appear if
the gas cap has not been fully tightened. You should
recheck your gas cap to ensure that it's fully tightened.
CHECK OIL LEVEL
- 36: For correct operation of
the low oil sensing system, your vehicle should be on a
level surface. A false CHECK OIL LEVEL message
may appear if the vehicle is parked on grades. The oil
level sensing system does not check for actual oil level
if the engine has been off for a short period of time, and
the oil level is never sensed while the engine is running.If the CHECK OIL LEVEL message appears and your
vehicle has been parked on level ground with the engine
off for at least 30 minutes, the oil level should be
checked by observing the oil dipstick. Prior to checking
the oil level, be sure the engine has been off for five
minutes and your vehicle is on a level surface. Then
check the dipstick and add oil if necessary. See ªEngine
Oilº in the Index.
CHECK WASHER FLUID
- 25: This message will
appear for several seconds indicating that you need
windshield washer solvent.
CRUISE ENGAGED
- 43: This message will
appear for a few seconds when you select a speed at
which to cruise.
DOOR AJAR
- 141: A door other than the driver's
is open or ajar when this message appears. The
vehicle's engine must be running and the transaxle
not in PARK (P) for this message to display. A chime
will also sound when the vehicle's speed is greater than
5 mph (8 km/h).
DRIVER DOOR AJAR
- 140: This message
will display when the vehicle is being shifted out of
PARK (P) with the engine running to signal that the
driver's door is open or ajar. A chime will also sound
when the vehicle's speed is greater than 5 mph (8 km/h).

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ICE POSSIBLE - 13: This message appears when
the outside air temperature is cold enough to create icy
road conditions.
LOW REFRIG A/C OFF
- 12: This message means
that the air conditioning system detects a refrigerant
level that is low enough to cause damage to the air
conditioning compressor. Have the air conditioning
system serviced if this message appears.
MONITORED SYSTEMS OK
- 1: This message only
appears in the ªrecallº mode by pressing the NO INFO
RESET button. It lets you know that no other messages
are stored or currently active.
OIL PRESSURE LOW STOP ENGINE
- 35: If this
message appears while the engine is running, stop the
engine and do not operate it until the cause of low oil
pressure is corrected. Severe damage to the engine can
result. A multiple chime will also sound when this
message is displayed.
OPTIONS NOT SET
- 99: This message will display if
a fault has occurred in your vehicle's memory. Have
your vehicle serviced by your dealership.PROGRAM PASS KEY
- 31: This warning message
displays when the PASS
-Key
II pellet information has
not been programmed into your vehicle. See your
dealership for service.
PHONE NOT PRESENT
- 126: This message will
appear when the steering wheel controls for the optional
phone system are activated but the phone is not plugged
into the vehicle. Make sure your phone is plugged in. If
your phone appears to be connected, see your dealership
for service.
REMOVE KEY
- 70: This message will appear when
the Personalized Automotive Security System
(PASS
-Key
II) is unable to read the pellet on the
ignition key or an improper key pellet has been inserted.
This message usually appears following the display of
STARTING DISABLED REMOVE KEY. The
instrument panel cluster will then run a timer and
change the messages to WAIT 3 MINUTES, WAIT
2 MINUTES, WAIT 1 MINUTE and then START CAR.
When the REMOVE KEY message is displayed, remove
the ignition key. Check the ignition key for damage. If it
is damaged, it may need to be replaced. If you see no
damage, clean the pellet contacts with a soft cloth or
napkin before inserting the key back into the ignition.
Have your vehicle serviced if the message still appears.

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SERVICE A/C SYSTEM - 14: This message appears
when the electronic sensors that control the air
conditioning and heating systems are no longer working.
Have the climate control system serviced if you notice a
drop in heating and air conditioning efficiency.
SERVICE AIR BAG
- 83: There is a problem with the
Supplemental Inflatable Restraint (air bag) system when
this message appears. Let only a qualified technician
work on your vehicle. See your dealership for service
at once.
SERVICE BRAKE FLUID SWITCH
- 37: A problem
in the brake fluid detection circuit causes this message
to display if the ignition is in RUN. Have the brake
system serviced by a technician as soon as possible. If
the brake warning light is on, refer to the directions
listed in that part.
SERVICE CHARGING SYSTEM
- 102: This
message will display when a problem with the charging
system has been detected. Have your vehicle serviced at
your dealership.
SERVICE ELECTRIC SYS
- 106: This message will
display if an electrical problem has occurred within the
Powertrain Control Module (PCM). Have your vehicle
serviced by your dealership.SERVICE FUEL SYSTEM
- 101: The PCM has
detected a problem within the fuel system when this
message appears. See your dealership for service.
SERVICE IDLE CONTROL
- 107: A problem
with the idle control has occurred when this
message displays. Drive your vehicle to the
dealership for service.
SERVICE RIDE SYS
- 84: This message is displayed
to indicate that the suspension system is not operating
properly. To correct this problem, have your vehicle
serviced at your dealership.
SERVICE STEERING SYS
- 127: This message is
displayed when a problem has been detected in the
Magnasteer

variable effort steering system. Service is
required. A single chime will also sound when this
message is displayed.
SERVICE TRANSMISSION
- 100: If a problem is
detected with the transaxle, this message will appear.
Have your vehicle checked by your dealership.
SERVICE VEHICLE SOON
- 3: If a problem is
detected with the transaxle, this message will appear.
Have your vehicle checked by your dealership.

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SERV STABILITY SYS - 54 : If you ever see the
SERV STABILITY SYS message, it means there may
be a problem with your stability enhancement system. If
you see this message, try to reset the system (stop; turn
off the engine; then start the engine again). If the SERV
STABILITY SYS message still comes on, it means there
is a problem. You should see your dealer for service.
Reduce your speed and drive accordingly.
STABILITY ENGAGED
- 55 : You may see the
STABILITY ENGAGED message on the Driver
Information Center. It means that an advanced,
computer
-controlled system has come on to help your
vehicle continue to go in the direction in which you're
steering. This stability enhancement system activates
when the computer senses that your vehicle is just
starting to spin, as it might if you hit a patch of ice or
other slippery spot on the road. When the system is on,
you may hear a noise or feel a vibration in the brake
pedal. This is normal.
When the STABILITY ENGAGED message is on, you
should continue to steer in the direction you want to go.
The system is designed to help you in bad weather or
other difficult driving situations by making the most of
whatever road conditions will permit. If the STABILITY
ENGAGED message comes on, you'll know that
something has caused your vehicle to start to spin, so
you should consider slowing down.A single chime will also sound when this message
is displayed.
STARTING DISABLED REMOVE KEY
- 33: This
message will appear when the Personalized Automotive
Security System (PASS
-Key
II) senses that an
improper ignition key is being used to try to start the
vehicle. Check the ignition key for damage. If it is
damaged, it may need to be replaced. If you see no
damage, clean the pellet contacts with a soft cloth or
napkin. Remove the ignition key and wait for the DIC to
display WAIT 3 MINUTES. The instrument panel
cluster will then run a timer and change the messages to
WAIT 2 MINUTES, WAIT 1 MINUTE and then
START CAR. When the START CAR message is
displayed, try again to start the engine.
THEFT SYSTEM PROBLEM, CAR MAY NOT
RESTART
- 34: This message means there is a problem
in the Personalized Automotive Security System
(PASS
-Key
II). A fault has been detected in the system
which means that the PASS
-Key
II system is disabled
and is not protecting the vehicle. The vehicle usually
restarts, however, you may want to take your vehicle to a
proper service center before turning off the engine.