climate control CADILLAC STS V 2007 1.G Owner's Manual

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 to limit problems with fogging.
In some conditions, using recirculation for long
periods of time can 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, select AUTO to return to automatic climate
control operation or push the recirculation button
again to select outside air.
Press this button a second time to select
outside air.
:(Outside Air):This mode forces the system
to pull air from outside the vehicle. It can be
used to bring fresh air into the vehicle.
Air Quality Sensor:Your vehicle could have an
air quality sensor to help limit the climate
control system from pulling in some harmfulexhaust fumes from older, poorly running, or
diesel-equipped vehicles that are driving near you.
This sensor, when active, monitors the air
quality in front of your vehicle and switches to air
recirculation when poor quality air is detected
outside your vehicle. Press the AUTO button on
the climate control to activate the air quality
sensor. The word AUTO comes on the center of
the climate control display. While the air quality
sensor senses poor quality air, the recirculation
graphic displays.
Under some conditions, the air quality sensor
system does not operate. In cold weather, the
system might not be active (even if AUTO is
displayed) because of concerns of fogging your
windows, which may occur by activating
recirculation mode. Also, the air quality sensor
system does not remain in recirculation mode for
extended periods of time that could cause stuffy or
very dry conditions in the vehicle. Following a
poorly running vehicle for an extended period of
time may not keep recirculation active indenitely.
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The air quality sensor does not activate due to
organic odors, like skunk, and may not activate on
many chemical-related odors. If you wish to limit
these types of odors, manually select recirculation.
Your vehicle could also have a charcoal lter that
can limit many odors from being pulled into your
vehicle. This lter, like your engines air cleaner
lter, needs to be changed periodically. See
Scheduled Maintenance on page 505. The air
quality sensor system does not protect against
carbon monoxide (CO), which you cannot see or
smell. SeeEngine Exhaust on page 125.
O(Power Driver’s Temperature):Press the
power button located on the driver’s side of
the climate control panel to turn the entire climate
control system on or off. Turn the knob to
increase or decrease the temperature inside the
vehicle.
O(Power Passenger’s Temperature):Press
the power button located on the passenger’s side
of the climate control panel to turn the passenger’s
climate control system on if they wish to have adifferent setting than the driver. Turn the knob to
increase or decrease the temperature for the
front passenger. Turning the passenger’s
side power button off will not shut off the climate
control system for the passenger. The system
is set to the same setting as the driver.
{(Ventilated Seat):Press this button, to turn on
the driver or passenger’s side ventilated seat, if
the vehicle has this feature. SeeHeated and
Ventilated Seats on page 11.
J(Heated Seat):Press this button, to turn on
the driver or passenger’s side heated seat
and seatback, if the vehicle has this feature. See
Heated and Ventilated Seats on page 11.
^(Air Conditioning):Press this button to
manually turn off the air conditioning compressor.
Press AUTO to return to automatic operation or
press the A/C OFF button again. To limit fogging on
the windshield, the air conditioning compressor
cannot be off while in the defrost mode.
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Sensors
There is a solar sensor located on the instrument
panel, near the windshield.
There is also an interior temperature sensor
located next to the steering wheel on the
instrument panel.
These sensors monitor the solar radiation and the
air inside the vehicle, then use the information
to adjust the temperature, the fan speed and the
air delivery system, in order to maintain theselected temperature. The system may also
supply cooler air to the side of the vehicle facing
the sun. Do not cover the sensors or the automatic
climate control system will not work properly.
Defogging and Defrosting
Fog on the inside of windows is a result of high
humidity (moisture) condensing on the cool window
glass. This can be minimized if the climate
control system is used properly. There are
two modes to clear fog from the windshield. Use
the defog mode to clear the windows of fog or
moisture and warm the passengers. Use the
defrost mode to remove fog or frost from the
windshield more quickly.
yNz(Mode):Press this button until defog
appears on the display.
-(Defog):This mode directs the air between
the windshield and oor outlets with some
air supplied to the outboard panel outlets and side
window defogging 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.
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Outlet Adjustment
Use the lever located in the center of each outlet
to change the direction of the airow, either
side-to-side or up and down. Use the thumbwheels
to open or close the outlets to adjust the airow.
Turn the thumbwheel towards the center
console to open the outlets and allow the
maximum amount of air to enter your vehicle. Turn
the thumbwheel towards the vehicle door to
close the outlets and minimize the amount of air
entering the vehicle.
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.
If the airow seems low when the fan speed is
at the highest setting, the passenger
compartment air lter may need to be replaced.
For more information, seePassenger
Compartment Air Filter on page 239.
Rear Climate Control System
Your vehicle has a rear climate control system.
The base model includes air outlets in the rear of
the center console for cooling and under-seat
air outlets for heating. The temperature, quantity,
and air delivery location is controlled automatically
by the front climate control system.
Some vehicles are equipped with an optional
climate control panel for the rear passenger,
located on the back of the center console.
The left knob controls the temperature of the air to
the rear passengers. Turning the knob to the
left will make the air cooler. Turning the knob to
the right will make the air warmer.
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The right knob controls the air delivery to the rear
passengers. Turning the knob all the way to
the left will shut off airow to the rear passengers.
Operating with the rear air delivery off may
make the entire vehicle warm or cool less quickly.
It may also increase the air rush sound of the
front system.
9(Off):This is the off position.
Y(Vent):This mode directs all the rear
passenger airow to the outlets in the console.
This is the normal position for cool down
conditions.
\(Bi-Level):This mode directs airow to the
console outlets and the oor.
[(Floor):This mode directs all of the airow to
the oor. This is the normal position for warm
up conditions.The amount of airow to the rear passengers is
controlled automatically by the front climate control
system, regardless of optional equipment.
Airow to the rear system will be turned off when
defrost is selected on the front climate control
panel to direct air to clear the windshield.
Vehicles equipped with a rear climate control
panel, also, have heated rear seats. There are
two buttons, each with three indicator lights,
located between the two climate control knobs on
the rear climate control panel, to control the
rear heated seats. SeeHeated Seats on page 14
for additional information.
Be sure to keep the area under the front seats
clear of any objects so the air in your vehicle can
circulate effectively.
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Passenger Compartment Air Filter
Your vehicle may be equipped with a passenger
compartment air lter. There are two types of lters
available. There is a standard dust lter that
traps small particles including pollen. There is,
also, a dust/odor lter available that traps dust and
pollen and also uses a charcoal element to help
reduce many offensive odors from entering
your vehicle. Like your vehicle’s engine air
cleaner/lter, it will need to be changed
periodically. For information on how often to
change the passenger compartment air lter, see
Scheduled Maintenance on page 505.
Notice:Driving without a passenger
compartment air lter in place can cause water
and small particles, like paper and leaves, to
be pulled into your climate control system
which may cause damage to it. Make sure you
always replace the old lter with a new one.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.
SeeEngine Compartment Overview on page 373
for more information on location. SeeDoing
Your Own Service Work on page 364for
information on doing your own service work.
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BATTERY VOLTAGE HIGH
This symbol appears
with this message.
This message displays when the electrical
charging system is overcharging the battery.
When the system detects that the battery voltage
is above an estimated 16 volts, this message
displays.
To reduce the charging overload, use the vehicle’s
accessories. Turn on the exterior lamps and
radio, set the climate control on AUTO and the fan
speed on the highest setting, and turn the rear
window defogger on.
The normal battery voltage range is
11.5 to 15.5 volts when the engine is running.
You can monitor battery voltage on the DIC
by pressing the information button until you nd
BATTERY VOLTS.
BATTERY VOLTAGE LOW
This symbol appears
with this message.
This message displays when the electrical system
is charging less than 10 volts or the battery has
been drained.
If this message appears immediately after starting
the engine, it is possible that the generator can
still recharge the battery. The battery should
recharge while driving, but may take a few hours
to do so. Consider using an auxiliary charger
to boost the battery after returning home or to a
nal destination. Make sure you follow the
manufacturer’s instructions.
If this message appears while driving or after
starting your vehicle and stays on, have it checked
immediately to determine the cause of this problem.
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PRESS START AND BRAKE TO
START ENGINE
This message displays when you need to press
down on the brake pedal while pressing the
start button on the electronic keyless ignition when
trying to start your vehicle. SeeStarting the
Engine on page 113for more information.
RADAR CRUISE NOT READY
This message displays when the Adaptive Cruise
Control system will not activate 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 you attempt 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 if the passenger’s side rear
door was 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 if you notice
a drop in heating and air conditioning efficiency.
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If you get the overheat warning with no sign of
steam, try this for a minute or so:
1. In heavy traffic, let the engine idle in
NEUTRAL (N) while stopped. If it is safe to do
so, pull off the road, shift to PARK (P) or
NEUTRAL (N) and let the engine idle.
2. Set the climate controls to the highest heat
setting and fan speed and open the windows,
as necessary.
If the coolant warning light is not on or the coolant
temperature gage does not indicate the engine
is overheating, you can drive. Just to be safe, drive
slower for about 10 minutes. If the warnings do
not come back on, drive normally.
If the warnings continue and you have not stopped,
pull over, stop, and park the vehicle right away.
If there is still no sign of steam, idle the engine for
three minutes while parked. If the warnings are
still indicated, turn off the engine and get everyone
out of the vehicle until it cools down. Also, see
“Overheated Engine Protection Operating Mode”
later in this section.
You might decide not to lift the hood but to get
service help right away.Overheated Engine Protection
Operating Mode
This operating mode allows your vehicle to be
driven to a safe place in an emergency. Should an
overheated engine condition exist, an overheat
protection mode which alternates ring groups of
cylinders helps prevent engine damage. In this
mode, you will notice a loss in power and engine
performance. An engine overheat warning will
indicate that an overheat condition exists. Driving
extended miles (km) and/or towing a trailer in
the overheat protection mode should be avoided.
Notice:After driving in the overheated
engine protection operating mode, to avoid
engine damage, allow the engine to cool before
attempting any repair. The engine oil will be
severely degraded. Repair the cause of coolant
loss and change the oil. SeeEngine Oil on
page 380.
395

Uniform Tire Quality Grading
Quality grades can be found where applicable on
the tire sidewall between tread shoulder and
maximum section width. For example:
Treadwear 200 Traction AA Temperature A
The following information relates to the system
developed by the United States National Highway
Traffic Safety Administration (NHTSA), which
grades tires by treadwear, traction, and
temperature performance. This applies only to
vehicles sold in the United States. The grades are
molded on the sidewalls of most passenger car
tires. The Uniform Tire Quality Grading (UTQG)
system does not apply to deep tread, winter-type
snow tires, space-saver, or temporary use
spare tires, tires with nominal rim diameters of
10 to 12 inches (25 to 30 cm), or to some
limited-production tires.
While the tires available on General Motors
passenger cars and light trucks may vary with
respect to these grades, they must also conform to
federal safety requirements and additional General
Motors Tire Performance Criteria (TPC) standards.
Treadwear
The treadwear grade is a comparative rating based
on the wear rate of the tire when tested under
controlled conditions on a specied government
test course. For example, a tire graded 150 would
wear one and a half (1.5) times as well on the
government course as a tire graded 100. The
relative performance of tires depends upon the
actual conditions of their use, however, and may
depart signicantly from the norm due to variations
in driving habits, service practices, and differences
in road characteristics and climate.
Traction – AA, A, B, C
The traction grades, from highest to lowest, are
AA, A, B, and C. Those grades represent the tire’s
ability to stop on wet pavement as measured under
controlled conditions on specied government test
surfaces of asphalt and concrete. A tire marked
C may have poor traction performance.
Warning:The traction grade assigned to this tire
is based on straight-ahead braking traction
tests, and does not include acceleration, cornering,
hydroplaning, or peak traction characteristics.
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