light CHEVROLET MONTE CARLO 2003 6.G Service Manual

Engine Coolant Temperature GageThis gage shows the engine coolant temperature.
It also provides an indicator of how hard your vehicle is
working. During the majority of the operation, the
gage will read 210ÉF (100ÉC) or less.
If you are pulling a load or going up hills, it is normal for
the temperature to ¯uctuate and approach the 250ÉF
(122ÉC) mark. When the gage reads greater than 250ÉF
(122ÉC), the HOT COOLANT TEMP light will be
illuminated in the message center and a chime will
sound continuously. If the gage reaches the 260ÉF
(125ÉC) mark, it indicates that the cooling system is
working beyond its capacity.
See
Engine Overheating on page 5-29.
Malfunction Indicator Lamp
Check Engine Light
United States-3400 V6
Engine ClusterUnited States-3800 V6
Engine Cluster
Canada-3400 V6 Engine
ClusterCanada-3800 V6 Engine
ClusterUnited StatesCanada
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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 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.
Notice:Modi®cations 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 this light to come on.
Modi®cations 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 FlashingÐ A mis®re condition has been
detected. A mis®re increases vehicle emissions
and may damage the emission control system on
your vehicle. Diagnosis and service may be
required.
·Light On SteadyÐ An emission control system
malfunction has been detected on your vehicle.
Diagnosis and service may be required.
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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 ¯ashing and remains on steady, see ªIf
the Light Is On Steadyº following.
If the light continues to ¯ash, 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 ¯ashing, follow the
previous steps, and see your dealer for service as soon
as possible.
If the Light Is on Steady
You also 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
Filling Your Tank on page 5-7. 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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Have you recently changed brands of fuel?
If so, be sure to fuel your vehicle with quality fuel. See
Gasoline Octane on page 5-4. 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, mis®ring, 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,
your dealer can check the vehicle. Your dealer has
the proper test equipment and diagnostic tools to ®x 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 to help your
vehicle pass an inspection:
Your vehicle will not pass this inspection if the 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, your GM dealer can prepare the
vehicle for inspection.
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Oil Pressure Indicator Light
The oil pressure indicator
tells you if you have the
correct oil pressure in your
engine to operate your
vehicle.
Under normal conditions the indicator should read
slightly above the half way point.
If your oil pressure falls too low, the indicator will read
at the low setting in the red zone.This message is displayed in the message center when
the engine oil pressure is low. A chime will sound
continuously, also.
If this occurs, you should have your vehicle serviced
immediately.
{CAUTION:
Don't keep driving if the oil pressure is low. If
you do, your engine can become so hot that it
catches ®re. 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. 3800 V6 Engine
United StatesCanada
3-42

Cruise Control Light
Tthe CRUISE light comes
on whenever you set your
cruise control. See
ªCruise Controlº under
Turn Signal/Multifunction
Lever on page 3-7.
Fuel Gage
The fuel gage, when the ignition is on, tells you about
how much fuel you have left in your tank.
The gage will ®rst indicate empty before you are out of
fuel, and you should get more fuel as soon as
possible.
United States-3400 V6
Engine ClusterUnited States-3800 V6
Engine Cluster
Canada-3400 V6 Engine
ClusterCanada-3800 V6 Engine
Cluster
3-43

Hot Coolant Temperature Warning
Message
This message is displayed when the cooling
system temperature gets hot. A chime will sound
continuously, also.
Check the coolant temperature gage and the coolant
level. See
Engine Coolant on page 5-26,Engine Coolant
Temperature Gage on page 3-38andEngine
Overheating on page 5-29for further information.
Low Oil Pressure Message
This message is displayed when the engine oil pressure
is low. A chime will sound continuously, also. See Oil
Pressure Indicator Light on page 3-42. United States
Canada
United StatesCanada
3-46

Low Brake Fluid Warning Message
This message will be displayed when your vehicle has a
brake problem. The brake system warning light will
also be illuminated.
If this message appears, the brakes aren't working
properly. You should have your vehicle serviced
immediately. See
Brake System Warning Light on
page 3-36for more information.
Service Vehicle Soon Message
This message will come on if you have engine problems.
These problems may not be obvious and may not
affect vehicle performance or durability. Consult a
quali®ed dealership for necessary repairs to maintain
top vehicle performance. United States
CanadaUnited StatesCanada
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RESET:You can reset the AVG ECON, FUEL USED
or AVG SPEED trip computer modes by pressing
and holding this button for three seconds while you are
in the mode you wish to reset. A chime will sound to
con®rm that your requested change has been made and
all the segments of the display will brie¯y light up.
To change the display to a metric or English reading,
press the RESET and MODE buttons at the same time.
Hold them down for three seconds, and the display
will change. A chime will be heard to con®rm the new
selection.
The reset button can also be used to manually calibrate
the compass. See ªManual Compass Calibrationº
later in this section.
The reset button can be used to set the compass zone
variation. See ªCompass Varianceº later in this
section.MODE:Press this button to cycle through three modes
of operation: Off, Compass/Temperature and Trip
Computer mode.
·Off:No driver information is displayed in this mode
of operation.
·Compass/Temperature Mode:One of eight
compass readings and the outside temperature are
displayed. If the temperature is below 38ÉF
(3ÉC), the word ICE is displayed for two minutes.
·Trip Computer:Pressing the MODE button cycles
through the ®ve displays. Press the MODE button
after the last Trip Computer display to return
the DIC to the OFF mode.
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Compact Disc Messages
If the disc comes out or CHECK CD appears on the
display, it could be for one of the following reasons:
·You're driving on a very rough road. When the road
becomes smoother, the disc should play.
·It's very hot. When the temperature returns to
normal, the disc should play.
·The disc is dirty, scratched, wet, or upside down.
·It is very humid. If so, wait about an hour and
try again.
·There may have been a problem while burning
the CD.
·The label may be caught in the CD player.
If any error occurs repeatedly or if an error can not be
corrected, contact your dealer.
Theft-Deterrent Feature
THEFTLOCKžis designed to discourage theft of your
radio. The feature works automatically by learning
a portion of the Vehicle Identi®cation Number (VIN). If
the radio is moved to a different vehicle, it will not
operate and LOCKED will be displayed.
When the ignition is off and RAP is not active, the
blinking red light indicates that THEFTLOCK is armed.
With THEFTLOCK activated, your radio will not
operate if stolen.
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