1999 CADILLAC DEVILLE air conditioning

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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).
ENGINE COOLANT HOT, IDLE ENGINE
- 44:
This message will appear when the engine coolant
temperature is over 248
F (126
C). To avoid added
strain on a hot engine, turn off the climate control
system. Stop and allow your vehicle to idle until it cools
down or the message is removed. If it does not cool
down, turn off the engine and have it serviced before
driving it again. Severe engine damage can result from
an overheated engine. See ªEngine Overheatingº in
the Index.
ENGINE HOT
- A/C 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 so that air conditioned air is not
delivered. If the coolant temperature returns to normal,
you must select AC to return to a normal A/C
compressor operation. If this message continues to
appear, have the system repaired as soon as possible to
avoid compressor damage.ENGINE MISFIRE, EASE OFF GAS PEDAL
- 114:
An engine misfire has occurred. You'll need to ease off
the gas pedal.
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 the driver that their vehicle is reducing engine
power because the transaxle is being placed in gear
under conditions that may cause damage to the vehicle
powertrain or vehicle acceleration.
FUEL LEVEL LOW
- 11 : This message serves as a
warning that the fuel level in the tank is critically low.
Stop for fuel soon.
HEADLAMPS SUGGESTED
- 23: If it's dark enough
outside and the Twilight Sentinel
control is 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's become dark enough outside to require the
headlamps and/or other exterior lamps).

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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. To avoid damage, the air
conditioning compressor automatically turns off and the
electronic climate control system will automatically
switch from AUTO to ECON and remain there.
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 RESET NO
(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. See your
dealership for service.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 typically 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 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 ELECTRIC SYS
- 106: This message will
display if an electrical problem has occurred within the
vehicle's electrical system. 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. Bring your vehicle to your 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
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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.
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.

3-
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Section 3 Comfort Controls and Audio Systems
In this section, you'll find out how to operate the comfort control and audio systems offered with your vehicle. Be
sure to read about the particular systems supplied with your vehicle.
3
-2 Comfort Controls
3
-2 Digital Cluster Climate Control Panel
(DeVille and DeVille d'Elegance Only)
3
-6 Analog Cluster Climate Control Panel
(DeVille Concours Only)
3
-9 Electronic Solar Sensor
3
-10 Air Conditioning
3
-10 Heating
3
-10 Defogging and Defrosting
3
-11 Rear Window Defogger
3
-12 Ventilation System
3
-13 HVAC Steering Wheel Controls
3
-13 Climate Control Personalization (If Equipped)
3
-14 Audio Systems
3
-14 Setting the Clock
3
-14 AM-FM Stereo with Cassette Tape Player
3
-18 AM-FM Stereo with Cassette Tape and
Compact Disc Player (If Equipped)3
-22 AM-FM Stereo with Cassette Tape and
Compact Disc Player with Radio Data
Systems (RDS) and Digital Signal Processing
(DPS) (If Equipped)
3
-31 Radio Data Systems (RDS) Program Type
(PTY) Selections
3
-32 CD Adapter Kits
3
-32 Trunk-Mounted CD Changer (If Equipped)
3
-36 Radio Personalization with Home and Away
Feature (If Equipped)
3
-37 Theft-Deterrent Feature
3
-37 Audio Steering Wheel Controls
3
-38 Understanding Radio Reception
3
-38 Tips About Your Audio System
3
-39 Care of Your Cassette Tape Player
3
-40 Care of Your Compact Discs
3
-41 Care of Your Compact Disc Player
3
-41 Power Antenna Mast Care

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Driver's Side Temperature Button
The red and blue temperature buttons adjust the air
temperature coming through the system. Press the blue
button for a cooler setting or the red button for a
warmer setting.
Passenger's Side Temperature Knob
With this feature, the right front passenger can control
the temperature of air for his/her own zone. The
passenger can select a four degree warmer or cooler
temperature from the driver's setting.
To turn the system on, press the knob on the passenger's
side armrest. Turn the knob clockwise to increase the
temperature and counterclockwise to decrease the
temperature. Press the knob again to turn the system off.
Outside Temperature Display
The outside temperature is always displayed when your
vehicle is running. You can change it from Fahrenheit to
Celsius by pressing the ENG/MET (English/metric)
button on the Driver Information Center (DIC).The outside temperature sensor is located near the front
grille. The sensor can be affected by road or engine heat
during idling, slow driving or when the engine is first
started after a short trip. In order to ensure proper
automatic climate control operation, the outside air
temperature display may not update as quickly as
expected. This is to allow the air surrounding the outside
temperature sensor to be as close to the actual outside
conditions as possible. This is determined by how much
time has elapsed since the vehicle has been turned off and
by vehicle speed.
Mode Controls
The AUTO/ECON button automatically controls the
direction of air delivery for air conditioning and non
-air
conditioning modes.
Automatic Operation
When the system is set for automatic operation, sensors
will control the air delivery mode. Air will come from
the floor, middle or windshield outlets. The fan speed
will vary as the system maintains the selected
temperature setting.
Be careful not to put anything over the solar sensor
located in the middle of the instrument panel near the
windshield. This sensor is used by the automatic system
to regulate temperature.

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To find your comfort zone, start with the 75
F (24
C)
setting and allow about 30 minutes for the system to
regulate. Press the red or blue temperature buttons to
adjust the temperature if necessary. If you choose 60
F
(16
C), the system will remain at that maximum cooling
setting and will not regulate fan speed. If you choose the
temperature of 90
F (32
C), the system will remain at
that maximum heating setting and will not regulate fan
speed. Choosing either maximum setting will not cause
the system to heat or cool any faster.
With the automatic setting, the air conditioning
compressor automatically cycles when needed to cool
the air. In cold weather, when the system senses the need
for heat, the airflow will be directed out the floor
outlets. As the interior temperature approaches a desired
setting, the blower speed will decrease. To maintain
interior comfort, the airflow may move to the instrument
panel air outlets and floor outlets (bi
-level mode). On
bright sunny days in cold weather, the airflow may come
out of the air conditioning outlets (AC mode) to
maintain comfort and prevent stuffiness.If your vehicle is sitting out on a hot day and you have it
set on AUTO, the air will first flow out the floor air
outlets for a few seconds. That is normal. This is to
expel hot air from the air outlets. As the air is cooled,
the airflow will move through the air conditioning
outlets. If you start your vehicle with the fan setting on
HI, it will skip the air conditioning purge.
To avoid blowing cold air in cold weather, the system will
delay turning on the fan until warm air is available. The
length of delay depends on the outside air temperature,
engine coolant temperature or the time since the engine
was last started. As the coolant warms up, the blower fan
speed will gradually increase and air will flow from the
heater outlets, with some airflow to the windshield to
prevent fogging under most normal conditions.
If you leave your vehicle, the system will remember the
control setting the next time you start your engine,
except for recirculation and defrost. Each ignition cycle
cancels recirculation, whereas, DEFROST will change
to automatic operation when the ignition is shut off and
then turned back on.

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Mode Button
Press the MODE button to deliver air through the floor,
middle or windshield outlets. The system will stay in the
selected mode until the MODE button is pressed again.
Press the up or down arrow to cycle through the
available modes.
Automatic Operation
When the system is set for automatic operation, sensors
will control the air delivery mode. Air will come from
the floor, middle or windshield outlets. The fan speed
will vary as the system maintains the selected
temperature setting.
Be careful not to put anything over the solar sensor
located in the middle of the instrument panel near the
windshield. This sensor is used by the automatic system
to regulate temperature.
To find your comfort zone, start with the 75
F (24
C)
setting and allow about 30 minutes for the system to
regulate. Turn the TEMP/AUTO knob to adjust the
temperature if necessary. If you choose 60
F (16
C),
the system will remain at that maximum cooling setting
and will not regulate fan speed. If you choose the
temperature of 90
F (32
C), the system will remain at
that maximum heating setting and will not regulate fan
speed. Choosing either maximum setting will not cause
the system to heat or cool any faster.With the automatic setting, the air conditioning
compressor automatically cycles when needed to cool
the air. In cold weather, when the system senses the
need for heat, the airflow will be directed out the floor
outlets. As the interior temperature approaches a desired
setting, the blower speed will decrease. To maintain
interior comfort, the airflow may move to the instrument
panel air outlets and floor outlets (bi
-level mode). On
bright sunny days in cold weather, the airflow may come
out of the air conditioning outlets (AC mode) to
maintain comfort and prevent stuffiness.
If your vehicle is sitting out on a hot day and you have
it set on AUTO, the air will first flow out the floor air
outlets for a few seconds. That is normal. This is to
expel hot air from the air outlets. As the air is cooled,
the airflow will move through the air conditioning
outlets. If you start your vehicle with the fan setting on
HI, it will skip the air conditioning purge.
To avoid blowing cold air in cold weather, the
system will delay turning on the fan until warm air is
available. The length of delay depends on the outside
air temperature, engine coolant temperature or the
time since the engine was last started. As the coolant
warms up, the blower fan speed will gradually increase
and air will flow from the heater outlets, with some
airflow to the windshield to prevent fogging under
most normal conditions.

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OFF: Press this button to turn the system off. Fresh air
will continue to flow through the vehicle, and the
system will try to maintain the previously set
temperature. The outside temperature will show on the
display when the system is OFF.
AC: Press this button to turn the air conditioning on and
off. The system will cool and dehumidify the air inside the
vehicle. In the AUTO mode, the display will show that
AC is active, but the air conditioning compressor only
operates when the system determines it is needed.
RECIRCULATION: Press this button to limit the
amount of fresh air entering your vehicle. This is helpful
when you are trying to cool the air quickly or limit odors
entering your vehicle. In the AUTO mode, the system
will use recirculation as necessary to cool the air.
Pressing the recirculation button will change the
operation to a manual mode and the air will recirculate
non
-stop. Press this button again to turn off the
recirculation feature.
If you notice the windows fogging, press the
recirculation button to exit the recirculation mode.
Electronic Solar Sensor
The sensor monitors the sun's solar radiation and is
located on top of the instrument panel near the
windshield. The ECC panel uses this information to
automatically make the necessary temperature and
airflow adjustments to maintain your comfort.