1999 CADILLAC DEVILLE sensor

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2-95
Trip Computer
Continual Variable Road Sensing
Suspension (CVRSS) (DeVille
Concours Only)
The CVRSS automatically adjusts the ride of your
vehicle. Automatic ride control is achieved through a
computer controller used to control and monitor the
suspension system. The computer controller receives
inputs from various sensors to determine the proper
system response. If the computer controller detects a
problem within the system, the DIC will display a
SERVICE RIDE CONTROL message. If this message
appears, have your vehicle serviced at your dealership.
Oil Life Indicator
This feature lets you know when to change the engine
oil. It's based on the engine oil temperatures and your
driving patterns. To see the display, press the
INFORMATION SKIP (SKIP INFO) button until XX
OIL LIFE LEFT appears. If you see 99% OIL LIFE
LEFT, 99 percent of your current oil life remains.

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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3-6 Analog Cluster Climate Control Panel
(DeVille Concours Only)
Fan Button
The button with the fan symbol adjusts the fan speed.
Press the up arrow to increase fan speed and the down
arrow to decrease fan speed.
Driver's Side Temperature Knob
The TEMP/AUTO knob adjusts the air temperature
coming through the system. Turn the TEMP/AUTO
knob clockwise to increase the temperature and
counterclockwise to decrease the temperature. Press
the TEMP/AUTO knob to put the system in the
automatic mode.Passenger's Side Temperature Button
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 PASS/TEMP button
located below the radio. Press the up arrow to increase
the temperature and press the down arrow to decrease
the climate setting. Pressing the OFF button will turn
off the dual
-zone function.
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.

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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.

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Engine Air Cleaner/Filter
The engine air cleaner/filter is located next to the
windshield washer fluid reservoir on the driver's side of
the engine. Be sure the engine has cooled before
following these steps to replace the air cleaner filter:
1. Disconnect the Intake
Air Temperature (IAT)
sensor from the base of
the air cleaner.
2. With a screwdriver,
loosen the air duct
clamp, which is located
at the mass airflow
sensor end of the
air duct.
3. Disconnect the air duct from the mass airflow sensor.

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6-17
4. Unhook both air cleaner cover latches. One latch is
located near the radiator hose (not shown) and the
other latch is located next to the IAT sensor.
5. Pivot the air cleaner and air duct assembly toward
the front of the vehicle. Remove the cover.6. Take out the air cleaner filter and remove any
loose debris that may be found laying in the air
cleaner base.
7. Install a new air filter element. See ªNormal
Maintenance Replacement Partsº in the Index.