CADILLAC DTS 2009 1.G Owners Manual

Automatic Operation
AUTO9(Automatic Fan):When this position is
selected on the fan control, the system adjusts the
fan speed. If the OnStar
®system is activated when
this position is selected, the climate control fan speed
will lower.
AUTO (Automatic Mode):
1. Turn the fan control to the AUTO position.
2. Turn the mode control to the AUTO position.
3. Adjust the temperature to a comfortable setting
between 68°F (21°C) and 78°F (26°C).
Choosing the coldest or warmest temperature
setting will not cause the system to heat or cool
any faster. In cold weather, the system will start at
reduced fan speeds to avoid blowing cold air into
the vehicle until warmer air is available. The system
starts out blowing air at the oor but may change
modes automatically as the vehicle warms up to
maintain the chosen temperature setting. The length
of time needed to warm the interior depends on the
outside temperature and temperature of the vehicle.
4. Wait 20 to 30 minutes for the system to stabilize
in order for the system to regulate automatically.
Then adjust the temperature as necessary to
nd your comfort setting.Do not cover the solar sensor located in the center of
the instrument panel near the windshield. For more
information on the solar sensor, see “Sensors” later
in this section.
After the vehicle is started, the display shows the
interior temperature settings and the outside
temperature.
If the AUTO position is selected on the fan or mode
control, the system automatically controls the air
conditioning compressor. The A/C compressor will
run automatically even at cool outside temperatures
in order to dehumidify the air. The A/C indicator light
is lit when the system is operating automatically, even
at near freezing outside temperatures. Press
#on the
fan control to turn off the A/C. For improved window
clearing performance in defog or defrost modes, the
A/C compressor runs automatically.
h(AUTO RECIRCULATION):If the AUTO position is
selected on either the fan or mode control, the system
automatically controls the air inlet to supply fresh outside
air or recirculate the interior air to cool the car faster.
The light on the recirculation button will come on when
the system changes to recirculation. Outside air can be
forced by pressing
hwhen the light is lit. For vehicles
without rear climate controls, press
:to force outside
air. The next time AUTO fan or mode is selected, the air
inlet will reset back to AUTO operation.
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Manual Operation
9(Off):Turns the entire climate control system off.
Outside air still enters the vehicle and is directed to
the oor. The airow direction and temperature can
be adjusted, as indicated below.
If the temperature is adjusted while the system is off,
the display will light to show the current settings.
wx(Driver’s Temperature Controls):Press the
up or down buttons next to the fan control to manually
increase or decrease the temperature inside the vehicle.
wx(Passenger’s Temperature Controls):
Press the up or down buttons next to the air delivery
mode control to manually increase or decrease the
temperature for the front passenger. If the passenger
climate control system is off, pressing one of these
buttons turns it on.
9(Fan Control):Turn clockwise or counterclockwise
to increase or decrease the fan speed. Turning this
control completely counterclockwise will turn on the
automatic fan operation. If the airow seems low
when the fan speed is at the highest setting, the
passenger compartment air lter may need to be
replaced. SeePassenger Compartment Air Filter
on page 3-48.Air Delivery Mode Control:Turn clockwise or
counterclockwise to change the current airow mode.
Select one of the following:
AUTO:Turns on the automatic delivery mode operation.
F(Vent):Air is directed to the instrument panel
outlets.
*(Bi-Level):Air is divided between the instrument
panel and the oor outlets. In automatic operation,
cooler air is directed to the upper outlets and warmer
air to the oor outlets.
7(Floor):Air is directed to the oor outlets with some
air directed to the side window outlets and the windshield.
If recirculation is selected, it only stays on for
three minutes to reduce windshield fogging.
W(Floor/Defog):This mode clears the windows of fog
or moisture. Air is directed to the oor outlets, with some
air going to the side window outlets and windshield.
When selected, the system turns off recirculation and
runs the air conditioning compressor unless the outside
temperature is at or below freezing. The recirculation
mode cannot be selected while in the oor/defog mode.
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0(Defrost):This mode clears the windshield of
fog or frost more quickly. Air is directed to the windshield
and side window outlets. When selected, the system
automatically turns off recirculation and runs the air
conditioning compressor, unless the outside temperature
is at or below freezing. Recirculation cannot be selected
while in the defrost mode. Do not drive the vehicle until
all the windows are clear.
For professional vehicles, air will be allowed to ow
through the rear outlets. For quicker defrost, press the
AUX button on the front climate control system so that
the light is not lit.
#(Air Conditioning):Press to turn the air
conditioning system on or off and override the automatic
system. When in AUTO, the air conditioning compressor
comes on automatically, as necessary. To avoid window
fogging on rainy and humid days at temperatures above
freezing, run the air conditioning.
The air conditioning system removes moisture from the
air, so a small amount of water may drip under the vehicle
while idling or after turning off the engine. This is normal.
:(Outside Air):Press to turn the outside air mode
on or off. An indicator light comes on to show it is on.
Air is pulled from outside the vehicle. Pressing
?will
cancel this mode.
?(Recirculation):Press to turn the recirculation
mode on or off. An indicator light below the button
comes on to show that this mode is on. This mode
recirculates and helps to quickly cool the air inside the
vehicle. It can be used to prevent outside air and odors
from entering the vehicle. This mode cannot be selected
while in the defog or defrost modes. If you try to select the
recirculation mode, the indicator light ashes three times
and turns off.
Operation in this mode during periods of high humidity
and cool outside temperatures may result in increased
window fogging. If window fogging is experienced, select
the defrost mode.
AUX:For vehicles with a rear climate control system,
press to turn the rear climate control fan on for automatic
operation. After the AUX button is pressed, the indicator
light comes on. Press the button again to turn the
auxiliary fan off. SeeRear Climate Control System
on page 3-46.
PASS (Passenger Climate Control):Press to turn the
passenger climate control systems on or off. When the
passenger climate control system is on, the passenger
temperature setting is displayed. The temperature
selected by the front passenger also controls the rear
system air temperature unless the rear seat passengers
select their own comfort setting.
If the PASS button is pressed to turn the passenger
temperature setting off, the driver’s temperature knob
will control the temperature for the entire vehicle.
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Rear Window Defogger
The rear window defogger uses a warming grid to
remove fog or frost from the rear window.
<(Rear Defogger):Press to turn the rear window
defogger on or off. Be sure to clear as much snow from
the rear window as possible. The rear window defogger
will turn off approximately 20 minutes after the button is
pressed if the vehicle is moving at slower vehicle speeds.
At higher vehicle speeds, the rear defogger may stay on
continuously. Each additional press will run the defogger
for approximately 10 minutes.
The heated outside rearview mirrors will turn on to help
clear fog or frost from the surface of the mirror when
the rear window defogger is on.
Notice:Do not use a razor blade or sharp object
to clear the inside rear window. Do not adhere
anything to the defogger grid lines in the rear glass.
These actions may damage the rear defogger.
Repairs would not be covered by your warranty.
Sensors
The solar sensor, located in the defrost grille, middle
of the instrument panel, monitors the solar radiation.
Do not cover the solar sensor or the system will not
work properly.
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There is also an interior
temperature sensor
located next to the steering
wheel that measures the
temperature of the air
inside the vehicle.
There is also an exterior temperature sensor located
behind the front grille. This sensor reads the outside
air temperature and helps maintain the temperature
inside the vehicle. Any cover on the front of the vehicle
could cause a false reading in the displayed temperature.In order to prevent false temperature readings at
startup, the displayed temperature will not change
until the following occurs:
Vehicle speed is above 10 mph (16 km/h) for
5 minutes.
Vehicle speed is above 32 mph (51 km/h) for
2 and a half minutes.
The climate control system uses the information from
these sensors to maintain your comfort setting by
adjusting the outlet temperature, fan speed, and the air
delivery mode. The system may also supply cooler air to
the side of the vehicle facing the sun. The recirculation
mode will also be used as needed to maintain cool outlet
temperatures.
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Outlet Adjustment
For the front outlets, use the thumbwheel located below
each outlet to change the direction of the airow. Use the
thumbwheel located next to the outlets to shut the airow
or to open the outlets and re-direct the air.
For the rear outlets, slide the lever left or right and up or
down to change the direction of the airow.
Operation Tips

Clear away any ice, snow or leaves from the air
inlets at the base of the windshield that may
block the ow of air into your vehicle.
Use of non-GM approved hood deectors may
adversely affect the performance of the system.
Keep the path under the front seats clear of objects
to help circulate the air inside of your vehicle more
effectively.
Rear Climate Control System
For vehicles with a rear climate control system, the rear
seat passengers can adjust the direction of the airow,
fan speed and temperature for the rear seating area.
This system also works with the main climate control
system in the vehicle.
The rear climate control system is located on the back
of the center console.
A. Display
B. Fan ControlC. Temperature Control
D. Air Delivery Mode
Control
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AUX (Auxiliary):Press the AUX button located on
the front climate control panel to turn the rear climate
control system on or off. When turned on the rear system
operates in automatic mode and the temperature settings
selected for the front climate control panel will also be
selected for the rear passengers.
To adjust the rear climate control system, the rear
passenger can select a different temperature, mode
or fan speed. Whenever the rear passengers have
adjusted settings on the rear climate control system,
the AUX light is lit on the front climate control system.
When the front climate control system is turned off
or in defrost mode, the rear climate control system is
turned off. The rear system will turn back on once
another front mode is selected.
For more information on how to use the front climate
control system, seeDual Climate Control System
on page 3-40. For more information on the air outlets,
seeOutlet Adjustment on page 3-46.Automatic Operation
«A ª(Fan Control):Press until AUTO appears on
the display to place the system in automatic mode. When
automatic operation is active, the system automatically
controls the fan speed. If in auto fan mode, pressing the
up arrow button will cancel automatic operation and
places the system in manual mode. If in auto mode,
pressing the down arrow will turn the rear climate
control system off.
«Nª(Air Delivery Mode Control):Press until
AUTO appears on the display to place the system
in automatic mode. When automatic operation is
active, the system controls the air delivery mode.
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Manual Operation
«A ª(Fan Control):Press to increase or decrease
the fan speed.
«bª(Temperature Control):Press to increase or
decrease the temperature for the rear seat passengers.
Once the rear temperature setting is changed from
following the front temperature setting, it will no longer
follow changes to the front temperature setting until
the front climate control AUX button resets it.
«Nª(Air Delivery Mode Control):Press these
buttons to change the air delivery mode. If in AUTO
air delivery mode, pressing the up arrow button will
cancel automatic operation and place the system in
manual mode.
Y(Vent):Air is directed to the upper outlets.
%(Bi-Level):Air is divided between the upper outlets
and the oor outlets.
[(Floor):Air is directed to the oor outlets.
Passenger Compartment Air Filter
The passenger compartment air lter traps most of the
pollen from the air entering the vehicle. The lter may
need to be changed periodically. For how often to change
the passenger compartment air lter, seeScheduled
Maintenance on page 6-4.
The access panel for the passenger compartment air
lter is located under the hood near the windshield,
on the passenger’s side of the vehicle.
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To access the passenger compartment air lter:
1. Use a tool to remove the cover. If the vehicle has
tabs that allow the cover to be unlatched with your
ngers, a tool will not be needed for this step.2. Then, insert a tool behind the push pin located on
the inboard side of the air lter compartment to
carefully pry the pin out.
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3. To remove the air lter, insert a tool between the air
lter and the compartment wall on the outboard side
of the vehicle. Then, push in to atten the pin holding
the air lter in place. Gently remove the air lter and
any loose debris that may be inside the air lter
compartment.
4. Insert the new air lter by pushing until you hear
a click. Then, reinstall the push pin and snap the
cover into place.
Warning Lights, Gages, and
Indicators
Warning lights and gages can signal that something is
wrong before it becomes serious enough to cause an
expensive repair or replacement. Paying attention to
the warning lights and gages could prevent injury.
Warning lights come on when there may be or is a
problem with one of the vehicle’s functions. Some
warning lights come on briey when the engine is
started to indicate they are working.
Gages can indicate when there may be or is a problem
with one of the vehicle’s functions. Often gages and
warning lights work together to indicate a problem with
the vehicle.
When one of the warning lights comes on and stays on
while driving, or when one of the gages shows there may
be a problem, check the section that explains what to do.
Follow this manual’s advice. Waiting to do repairs can be
costly and even dangerous.
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