2001 CADILLAC SEVILLE air condition

Section
3
Comfort Controls and Audio Systems
Section
4
Your Driving and the Road
Section
5
Table of Contents (cont'd)
Defensive Driving
Drunken Driving
Control of a Vehicle
BrakingSteering
Driving Tips for Various Road Conditions
Loading Your Vehicle
Towing a Trailer Heating and Air Conditioning
Setting the Radio Clock
Radio/Cassette Player/CD PlayerRadio Theft-Deterrent Feature
Steering Wheel Controls
Hazard Warning Flashers
Jump Starting
Towing Your VehicleEngine Overheating
Changing a Flat Tire
If You're Stuck
Problems on the Road
iii

1-30 Automatic Occupant Sensor (AOS) System
Your vehicle may have an automatic system that will turn
off the right front passenger's frontal and side impact air
bags under certain conditions. The driver's frontal and
side impact air bags are not part of the AOS system.
United States CanadaIf the rearview mirror in your vehicle has PASSENGER
AIR BAG on it, your vehicle has the AOS system.
When you turn the key to ON or START, the words ON
and OFF will come on in the rearview mirror. See
ªPASSENGER AIR BAG ON/OFF Lightº in the Index.
If your rearview mirror doesn't have the words
PASSENGER AIR BAG on it, your vehicle doesn't
have the AOS system.
The AOS system works with sensors that are part of the
right front passenger's seat. The sensors are designed
to detect the presence of an occupant on the seat and
determine if the passenger's frontal and side impact
air bags should be on or off.

2-83
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 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, 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.

2-84

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.
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.

2-94
CHECK FUEL GAGE - 50: 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.
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 a few
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 TIRE PRESSURE
- 144: This message is
displayed when the Tire Pressure Monitor (TPM) system
detects a low or high tire pressure condition in one or
more of the road tires. By pressing the INFO button up
or down the DIC display will show which tire or tires do
not have the correct inflation pressure. A ªLOW TIREº
condition exists when the tire's air pressure is under
24 psi (165 kPa) and a ªHIGH TIREº condition exists
when the tire's air pressure is above 36 psi (248 kPa).
The system will display the air pressure, the tire location
(LF, RF, RR or LR) and if the air pressure is low or
high. The tire pressure information is available in
English or metric measurements. For example, a driver's
side front tire that is low may be shown as: 22 PSI LF
TIRE LOW.
The correct tire inflation pressure should be set to those
shown on the Tire Loading
-Information Label, located on
the rear edge of the driver's door. For more information
regarding proper tire inflation, see ªInflation
-- Tire
Pressureº in the Index. If a tire is low, you should stop
as soon as possible and inspect your tire(s) for damage.
If a tire is flat, see ªIf a Tire is Flatº in the Index.

2-96
ENGINE HOT-AC OFF - 16: This message displays
when the engine coolant becomes hotter than the normal
operating temperature. To avoid added strain on a hot
engine, the air conditioning compressor is automatically
turned off. When the coolant temperature returns to
normal, the A/C operation will automatically resume.
You can continue to drive your vehicle. If this message
continues to appear, have the system repaired as soon as
possible to avoid compressor damage.
ENGINE OVERHEATED, STOP ENGINE
- 42: This
message will appear when the engine has overheated.
Stop and turn the engine off immediately to avoid severe
engine damage. See ªEngine Overheatingº in the Index.
A multiple chime will also sound when this message
is displayed.
ENGINE POWER REDUCED
- 41: This message
informs you that the vehicle is reducing engine power
because the transaxle is being placed in gear under
conditions that may cause damage to the vehicle's
engine, transaxle or ability to accelerate.
FUEL LEVEL LOW
- 11 : This message serves as
a warning that the fuel level in the tank is critically low.
Stop for fuel soon. A single chime will also sound when
this message is displayed.HEADLAMPS SUGGESTED
- 23: If it's dark enough
outside and the headlamps and the Twilight Sentinel

controls are off, a HEADLAMPS SUGGESTED
message will display on the DIC. This message
informs the driver that turning on the exterior lamps is
recommended even though the Daytime Running Lamps
(DRL) are still illuminated. It has become dark enough
outside to require the headlamps and/or other exterior
lamps. This message will also appear if the optional
Rainsense wiping feature is on and the Twilight
Sentinel

is off.
ICE POSSIBLE
- 13: This message appears when
the outside air temperature is cold enough to create icy
road conditions.
LEFT REAR DOOR AJAR
- 142: The left rear door
is open or ajar when this message appears. The ignition
must be in ON 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 3 mph (4.8 km/h).
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.

2-97
PASSENGER DOOR AJAR - 141: The passenger's
door is open or ajar when this message appears.
The ignition must be in ON 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 3 mph (4.8 km/h).
RIGHT REAR DOOR AJAR
- 143: The right
rear door is open or ajar when this message appears.
The ignition must be in ON 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 3 mph (4.8 km/h).
SERVICE AC 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 CHARGING SYS
- 102: This message
will display when a problem with the charging system
has been detected. Have your vehicle serviced at
your dealership.
SERVICE ELECTRICAL SYS
- 106: This message
will display if an electrical problem has occurred within
the Powertrain Control Module (PCM) or the ignition
switch. Have your vehicle serviced by your dealership.
SERVICE FUEL SYSTEM
- 101: The Powertrain
Control Module (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.
Take your vehicle to your dealership for service.
SERVICE STABILITY SYS
- 54: If you ever see
the SERVICE 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 SERVICE 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. A single chime will also sound when this
message is displayed.

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STABILITY SYS ENGAGED - 55: You may see
the STABILITY SYS 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 SYS 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
SYS ENGAGED message comes on, you'll know that
something has caused your vehicle to start to spin,
so you should consider slowing down.
SERVICE STEERING SYS
- 127: This message
is displayed when a problem has been detected in the
Magnasteer

variable effort steering system. Service
is required.SERVICE SUSPENSION 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 THEFT SYSTEM
- 34: This message
means there is a problem in the Personalized
Automotive Security System (PASS
-Key
III).
A fault has been detected in the system which means
that the PASS
-Key III 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.
SERVICE TPM SYSTEM
- 51: When this message is
displayed, the Tire Pressure Monitor (TPM) system is
not working properly. See your dealer for service.
SERVICE TRANSMISSION
- 100: See your dealer
for repair.
SERVICE VEHICLE SOON
- 3: This message is
displayed when a non
-emissions related powertrain
malfunction occurs. Have your vehicle serviced by a
technician as soon as possible.