Engine CADILLAC DEVILLE 2001 8.G Owner's Guide

2-87
Engine Coolant Temperature Gage
United States
(Analog Only)Canada
(Analog Only)
This gage shows the
engine coolant
temperature. If the
gage pointer moves
into the red area, the
engine is too hot.
Digital Cluster
That reading means the same thing as the warning
light
-- the engine coolant has overheated. See ªEngine
Overheatingº in the Index.

2-88
Malfunction Indicator Lamp (Service
Engine Soon Light in the United States
or Check Engine Light in Canada)
United States Canada (Analog Only)
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 or CHECK ENGINE light
comes on 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.

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NOTICE:
Modifications made to the engine, transaxle,
exhaust, intake 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
or CHECK ENGINE 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.
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.

2-90
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.
Are you low on fuel?
As your engine starts to run out of fuel, your engine
may not run as efficiently as designed since small
amounts of air are sucked into the fuel line causing a
misfire. The system can detect this. Adding fuel should
correct this condition. Make sure to install the fuel cap
properly. See ªFilling Your Tankº in the Index.
It will take a few driving trips to turn the light off.

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Have you recently changed brands of fuel?
If so, be sure to fuel your vehicle with quality fuel.
See ªFuelº in the Index. Poor fuel quality will cause
your engine not to run as efficiently as designed.
You may notice this as stalling after start
-up, stalling
when you put the vehicle into gear, misfiring, hesitation
on acceleration or stumbling on acceleration. (These
conditions may go away once the engine is warmed up.)
This will be detected by the system and cause the light
to turn on.
If you experience one or more of these conditions,
change the fuel brand you use. It will require at least
one full tank of the proper fuel to turn the light off.
If none of the above steps have made the light turn off,
have your dealer or qualified service center check the
vehicle. Your dealer has the proper test equipment and
diagnostic tools to fix any mechanical or electrical
problems that may have developed.Emissions Inspection and Maintenance Programs
Some state/provincial and local governments have or
may begin programs to inspect the emission control
equipment on your vehicle. Failure to pass this
inspection could prevent you from getting a
vehicle registration.
Here are some things you need to know in order to help
your vehicle pass an inspection:
Your vehicle will not pass this inspection if the
SERVICE ENGINE SOON or CHECK ENGINE
light is on or not working properly.
Your vehicle will not pass this inspection if the OBD
(on
-board diagnostic) system determines that critical
emission control systems have not been completely
diagnosed by the system. The vehicle would be
considered not ready for inspection. This can happen
if you have recently replaced your battery or if your
battery has run down. The diagnostic system is designed
to evaluate critical emission control systems during
normal driving. This may take several days of routine
driving. If you have done this and your vehicle still
does not pass the inspection for lack of OBD system
readiness, see your dealer or qualified service center to
prepare the vehicle for inspection.

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Oil Pressure Light
This light tells you if there
could be a problem with
your engine oil pressure.
The light goes on when you turn your key to ON. It goes
off once you start your engine. That's a check to be sure
the light works. If it doesn't come on, be sure to have
it fixed so it will be there to warn you if something
goes wrong.
When the light comes on and stays on, it means that
oil isn't flowing through your engine properly. You
could be low on oil and you might have some other
system problem.CAUTION:
Don't keep driving if the oil pressure is low.
If you do, your engine can become so hot that
it catches fire. You or others could be burned.
Check your oil as soon as possible and have
your vehicle serviced.
NOTICE:
Damage to your engine from neglected oil
problems can be costly and is not covered by
your warranty.

2-96
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
INFO: Pressing this button up or down will display the
MILES RANGE (Analog Cluster), MPG AVG, MPG
INST, GAL FUEL USED, AVG MPH, TIMER,
BATTERY VOLTS, LF
-RF-LR-RR TIRE
(If Equipped), RPM TACHOMETER (Digital Cluster),
ENGINE OIL LIFE, TRANS FLUID LIFE, PHONE
(If Equipped), FEATURE PROGRAMMING and
Blank Display.
INFO RESET: Pressing this button will reset the
MPG AVG, GAL FUEL USED, MPH AVG, TIMER,
ENGINE OIL LIFE, TRANS FLUID LIFE, when each
mode is individually selected. For more information
about the trip odometer, see ªOdometerº in the Index.
ON/OFF: Pressing this button turns the Programming
and Personalization Features on and off. (FEATURE
PROGRAMMING must be displayed on the DIC to
begin actual programming.) This button also starts and
stops the timer.
MILES RANGE: (Analog Cluster Only.) This message
shows about how many miles you can drive without
refilling your fuel tank. Once the range drops below
40 miles (64 km) remaining, the display will
show LOW.

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LF-RF-LR-RR TIRE (If Equipped): On vehicles
equipped with the Tire Pressure Monitor, this message
shows the tire pressure for each tire (left front, right
front, left rear and right rear). Pressing the INFO button
will scroll through the tire pressure for each of the
four tires, such as:

34 PSI LF TIRE OK or

234 kPa LF TIRE OK
If a tire pressure is below 24 PSI (165 kPa) or above
36 PSI (248 kPa), the message will appear as shown
above except it will show TIRE LOW or TIRE HIGH
as appropriate. If desired, the tire pressure information
can be programmed not to appear when using the
INFO button to scroll through the DIC displays.
See ªVehicle Programming and Personalization
Featuresº in the Index.
If a low or high tire pressure is detected by the system
while driving, a CHECK TIRE PRESSURE message
will appear in the display. If this occurs, press the
INFO button to scroll to the tire(s) with a low or high
pressure condition. See ªDriver Information Center
(DIC) Messagesº in the Index for more information.ENGINE OIL LIFE (Reset): Press the INFO button
to display ENGINE OIL LIFE, then press and hold the
INFO RESET button until 100% ENGINE OIL LIFE is
displayed. (This only needs to be reset after you have
had the oil changed.)
TRANSMISSION FLUID LIFE MONITOR: Under
normal conditions, the rate of deterioration of the
transmission fluid is slow. See the Maintenance
Schedule booklet for proper fluid and change intervals.
Press the INFO button to display TRANS FLUID LIFE,
then press and hold the INFO RESET button until
100% TRANS FLUID LIFE is displayed. (This only
needs to be reset after you have had the fluid changed.)
ENG/MET: Press this button to display information in
the English (miles) or metric (kilometers) system.

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Driver Information Center (DIC) Messages
These messages will appear if there is a problem sensed
in one of your vehicle's systems. Vehicles that are first
sold in Canada will have a number after each message.
This number helps to identify the problem. You must
then press INFO or INFO RESET to clear the display
screen for further use. However, be sure to take any
message that appears on the display screen seriously
and remember that pressing the INFO or INFO RESET
button will only make the message disappear, not
the problem.
DIC messages can also be displayed in French, German,
Spanish and Japanese. Contact your dealer to have the
language display adjusted for your vehicle.
BATTERY NOT CHARGING
- 7: This message will
appear if the battery is not being charged. Have the
electrical system checked by your dealership at your
earliest convenience.BATTERY SAVER ACTIVE
- 27: This message
is displayed when the vehicle has detected that the
battery voltage is dropping beyond a reasonable point.
The battery saver system will start reducing certain
features of the vehicle that you may not be able to
notice. At the point that features are disabled, this
message is displayed. It means that the vehicle is trying
to save the charge in the battery. Turn off unnecessary
accessories to allow the battery to recharge.
BATTERY VOLTAGE HIGH
- 8: This message
shows that the electrical charging system is
overcharging (more than 16 volts). To avoid being
stranded, have the electrical system checked by your
dealership. You can reduce the charging overload by
using the accessories. Turn on the lamps and radio, set
the climate control on AUTO and the fan speed on HI,
and turn the rear window defogger on. You can monitor
battery voltage on the DIC by pressing the INFO button.
The normal range is 11.5 to 15.5 volts when the engine
is running.

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BATTERY VOLTAGE LOW - 6: This message
will appear when the electrical system is charging less
than 10 volts or if the battery has been drained. If this
message appears immediately after starting, it is
possible that the generator can still recharge the battery.
The battery should recharge while driving but may take a
few hours to do so. Consider using an auxiliary charger
(be sure to follow the manufacturer's instructions) to
boost the battery after returning home or to a final
destination. If this message appears while driving or
after starting your vehicle and stays on, have it checked
immediately to determine the cause of this problem.
To help the generator recharge the battery quickly, you
can reduce the load on the electrical system by turning off
the accessories. You can monitor battery voltage on the
DIC by pressing the INFO button. The normal range
is 11.5 to 15.5 volts.
CHANGE ENGINE OIL
- 82: This means that the
life of the engine oil has expired and it should be
changed within 200 miles. See ªEngine Oilº and
ªFilter Recommendationsº in the Maintenance Schedule
booklet. After an oil change, the Oil Life Indicator must
be reset. See ªOil Life Indicator, How to Resetº in
the Index.CHANGE TRANS FLUID
- 47: This message will
appear when it is time to replace the transaxle fluid. See
the Maintenance Schedule booklet for the proper fluid
and change intervals.
CHECK BRAKE FLUID
- 37: This message will
display if the ignition is in ON to inform the driver that
the brake fluid level is low. Have the brake system
serviced by a technician as soon as possible. See ªBrake
System Warning Lightº in the Index.
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 GAGE
- 50: (Analog Cluster Only)
This message will appear when the fuel supply is less
than 5 gallons (18.9 L) and the display is turned off.
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.