2009 CADILLAC STS air conditioning

Climate Controls
Dual Climate Control System
The heating, cooling, and ventilation can be controlled
for the vehicle with this system.
Automatic Operation
A. Driver and Passenger
Side Power Buttons
B. Ventilated Seat
C. AUTO
D. Recirculation
E. Air ConditioningF. Heated Seat
G. Fan Control
H. Defrost
I. Rear Window Defogger
J. Air Delivery Mode
ControlAUTO (Automatic):The system automatically
controls the fan speed, air delivery, air conditioning
and recirculation modes in order to heat or cool the
vehicle to the desired temperature.
To place the system in automatic mode:
1. Press the AUTO button.
2. Adjust the temperature to a comfortable setting,
generally, between 70°F (21°C) and 80°F (27°C).
Choosing the coldest or warmest temperature
setting will not cause the system to heat or cool
any faster. If the system is set at the warmest
temperature setting, the system will try to
continuously heat the vehicle and will not adjust
the system down as the vehicle warms up.
To avoid blowing cold air in cold weather, the
system delays turning on the fan until warm air
is available. The system starts out blowing air
at the oor, but can automatically change modes
as the vehicle warms up to maintain the chosen
temperature setting. The length of time needed for
warm up depends on the outside temperature and
the length of time that has elapsed since the vehicle
was last driven.
3. Wait for the system to regulate. This may take from
10 to 30 minutes. Then adjust the temperature,
if necessary.
The display can be changed from English to metric units
through the Driver Information Center (DIC). SeeDIC
Operation and Displays on page 3-72. Vehicles With Heated and Ventilated Seats Shown,
Vehicles Without Similar
3-48

-(Defog):This mode clears the windows of fog
or moisture. Air is directed to the windshield and oor
outlets, with some air directed to the side windows and
outboard panel outlets. When this mode is selected,
the system turns off recirculation and runs the
air-conditioning compressor unless the outside
temperature is at or below freezing. If recirculation
is selected while in the defog mode, it is cancelled
after 10 minutes.
If there is fogging on the side windows, remain in defog or
defrost mode until they clear.
0(Defrost):This mode clears the windshield of fog
or frost more quickly. Air is directed to the windshield,
with some air directed to the side windows and outboard
panel outlets. The air-conditioning compressor runs
automatically in this setting, unless the outside
temperature is at or below freezing. Recirculation
cannot be selected while in the defrost mode.
This mode can also cause the fan speed and air
temperature to increase.
^(Air Conditioning):Press to turn the air
conditioning off. Press AUTO to return to automatic
operation. To limit fogging on the windshield, the
air conditioning compressor cannot be off while in
the defrost mode.
h(Recirculation):Press once to select recirculation
mode or twice to select outside air. If in AUTO mode,
press
honce to select recirculation. 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.
Recirculation is not available in the defrost mode and
shuts off when defog mode is selected. Both of these
features are designed to limit fogging in the vehicle.
If recirculation is selected during defog mode,
it automatically turns off after 10 minutes.
Using the recirculation for long periods of time might
cause the air inside the vehicle to become too dry or
stuffy. To prevent this from happening, after the air in
the vehicle has cooled, press the recirculation button
again to select outside air or press the AUTO button.
3-50

ENGINE HOT – AC
(Air Conditioning) OFF
This message displays when the engine coolant
becomes hotter than the normal operating temperature.
SeeEngine Coolant Temperature Gage on page 3-65.
To avoid added strain on a hot engine, the air
conditioning compressor is automatically turned off.
When the coolant temperature returns to normal, the
air conditioning compressor turns back on. You can
continue to drive your vehicle.
If this message continues to appear, have the system
repaired by your dealer/retailer as soon as possible
to avoid damage to the engine.
ENGINE POWER REDUCED
This message displays when the engine power is being
reduced to protect the engine from damage. There could
be several malfunctions that might cause this message.
Reduced engine power can affect the vehicle’s ability to
accelerate. If this message is on, but there is no reduction
in performance, proceed to your destination. The
performance may be reduced the next time the vehicle
is driven. The vehicle may be driven at a reduced speed
while this message is on, but acceleration and speed may
be reduced. Anytime this message stays on, take the
vehicle to your dealer/retailer for service as soon as
possible.
3-84

RADAR CRUISE NOT READY
This message displays when the Adaptive Cruise
Control system is not activating due to a temporary
condition. Your vehicle does not require service.
This message also displays when either of the
following conditions occur:
The driver turns off the head-up display (HUD)
while the Adaptive Cruise Control is engaged.
The driver attempts to engage the Adaptive Cruise
Control while the HUD is off.
If this message appears when attempting to activate the
system, continue driving for several minutes and then
try activating the system again.
RIGHT REAR DOOR AJAR
This symbol appears with
this message.
This message displays when the passenger side rear
door is not closed completely. Make sure that the door is
closed completely.
SERVICE AC (Air Conditioning)
SYSTEM
This message displays when the electronic sensors that
control the air conditioning and heating systems are
no longer working. Have the climate control system
serviced by your dealer/retailer if a drop in heating
and air conditioning efficiency is noticeable.
SERVICE AIR BAG
This message displays if there is a problem with the
airbag system. Have your vehicle serviced by your
dealer/retailer immediately. SeeAirbag Readiness
Light on page 3-58for more information.
SERVICE BRAKE ASSIST
This message displays when a problem with the panic
brake assist system has been detected. Have your
vehicle serviced by your dealer/retailer.
SERVICE LANE DEPARTURE SYSTEM
If your vehicle has the Lane Departure Warning (LDW)
system, this message may display to indicate that the
LDW system is not working properly. If this message
remains on after continued driving, the system needs
service. See your dealer/retailer. See the Index in the
Navigation manual for more information.
3-89

Tire Terminology and Denitions
Air Pressure:The amount of air inside the
tire pressing outward on each square inch of the
tire. Air pressure is expressed in pounds per
square inch (psi) or kilopascal (kPa).
Accessory Weight
:This means the combined
weight of optional accessories. Some examples of
optional accessories are, automatic transmission,
power steering, power brakes, power windows,
power seats, and air conditioning.
Aspect Ratio
:The relationship of a tire’s height
to its width.
Belt
:A rubber coated layer of cords that is
located between the plies and the tread. Cords
may be made from steel or other reinforcing
materials.
Bead
:The tire bead contains steel wires wrapped
by steel cords that hold the tire onto the rim.Bias Ply Tire
:A pneumatic tire in which the plies
are laid at alternate angles less than 90 degrees
to the centerline of the tread.
Cold Tire Pressure
:The amount of air pressure
in a tire, measured in pounds per square inch (psi)
or kilopascals (kPa) before a tire has built up heat
from driving. SeeInflation - Tire Pressure on
page 5-64.
Curb Weight
:The weight of a motor vehicle with
standard and optional equipment including the
maximum capacity of fuel, oil, and coolant,
but without passengers and cargo.
DOT Markings
:A code molded into the sidewall
of a tire signifying that the tire is in compliance
with the U.S. Department of Transportation (DOT)
motor vehicle safety standards. The DOT code
includes the Tire Identication Number (TIN), an
alphanumeric designator which can also identify
the tire manufacturer, production plant, brand,
and date of production.
5-59

The underhood fuse block is located in the front of
the engine compartment on the passenger side of
the vehicle. SeeEngine Compartment Overview on
page 5-12for more information on location and removal
procedure for the front compartment underhood sights
shields.
To access the fuses, push in the tabs located on each
side of the fuse block cover, then lift the cover off.
Notice:Spilling liquid on any electrical components
on the vehicle may damage it. Always keep the
covers on any electrical component.
Fuses JCase Usage
ABS MTRABS Module - ABS Module -
Stabilitrak
AFS Active Front Steering
BLWR Blower Motor
FAN 1 Cooling Fan-Low Speed
FAN 2 Cooling Fan-High Speed
LPDB 1 Driver Side Rear Fuse Block
LPDB 2 Driver Side Rear Fuse Block
RPDB 1 Passenger Side Rear Fuse Block
RPDB 2 Passenger Side Rear Fuse Block
Fuses JCase Usage
SPARE Spare
SPARE Spare
STRTR Starter
Fuses Mini Usage
A/C CLTCH Air Conditioning Compressor Clutch
ABS ABS Module-Stabilitrak
ABS IGN Antilock Brake Controller
AUX OUTLET Rear Accessory Power Outlet
BRK VAC
PUMPBrake Vacuum Pump
CCP Climate Control Panel
CCP/RLY
COILSClimate Control Panel, Headlamp
Level Control, Active Cruise Control,
Relay Coils, Starter, Front Blower
ECM 1 Engine Control Module (ECM)
ECM/TCM
BATTECM, Transmission Control
Module (TCM)
ECM/TCM IGNECM, TCM, Instrument Panel
Cluster
5-125

Fuses Mini Usage
V/CHKInstrument Panel Module-Voltage
Check
WPR Wipe/Wash Module Assembly
WPR SW/VICS Rain Sensor, Wiper Switch
Relays Usage
A/C CMPRSR
CLTCHAir Conditioning Compressor Clutch
ACCYAccessory, Rain Sensor, Headlamp
Washer Relay Coil, Windshield
Wiper/Washer Module
BRK VAC
PUMPBrake Vacuum Pump
FAN S/P Cooling Fan Series/Parallel
FOG LAMP Fog Lamps
FRT BLWR Front Blower Motor
FUEL COOL Fuel Cooling Pump
HI BEAM High Beam Headlamp
HI FAN SPD Cooling Fan High Speed
HORN Horn
Relays Usage
LO FAN SPD Cooling Fan Low Speed
LOW BEAM
W/O HID/HIDLow Beam Headlamp, High Intensity
Discharge (HID)
PRK LAMPParking Lamps, Instrument Panel
Dimming, Rear License Plate Lamps
PWR/TRN Engine Controls
RUN CRNKHeated Washer Nozzle, Air Quality,
Antilock Brake System, Climate
Control Panel, TCM, ECM,
Instrument Panel Cluster
SPARE Spare
SPARE Spare
SPARE Spare
STRTR Starter
WPR HI Windshield Wiper High Speed
Circuit
BreakersUsage
HDLP WASHHeadlamp Washer Motor
(Circuit Breaker)
5-127

Capacities and Specications
The following approximate capacities are given in English and metric conversions. SeeRecommended Fluids and
Lubricants on page 6-13for more information.
ApplicationCapacities
English Metric
Air Conditioning Refrigerant R134aFor the air conditioning system refrigerant charge
amount, see the refrigerant caution label located
under the hood. See your dealer/retailer for more
information.
Brake Fluid Capacities 1.1 qt 1.0 L
Cooling System
3.6L Engine 11.2 qt 10.6 L
4.4L (V-Series) Engine 13.4 qt 12.7 L
4.6L Engine 11.7 qt 11.1 L
Cooling System — Intercooler 4.4L (V-Series) Engine 2.6 qt 2.5 L
Engine Oil with Filter
3.6L Engine 6.0 qt 5.7 L
4.4L (V-Series) Engine 9.0 qt 8.5 L
4.6L Engine 8.0 qt 7.6 L
Fuel Tank 17.5 gal 66.2 L
5-134