air conditioning CADILLAC CTS V 2005 1.G Owners Manual

Climate Controls
Dual Climate Control System
With this system you can control the heating, cooling
and ventilation for your vehicle.
Automatic Operation
AUTO (Automatic):When this button is pressed and
the temperature is set, the system will automatically
control the inside temperature, the air delivery mode, the
air conditioning compressor and the fan speed. AUTO
will appear on the display.
1. Press the AUTO button.
2. Adjust the temperature to a comfortable setting
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 you set the system at the warmest
temperature setting, the system will remain in
manual mode at that temperature and it will not go
into automatic mode.
In cold weather, the system will start at reduced fan
speeds to avoid blowing cold air into your vehicle
until warmer air is available. The system will
start 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 for warm up will depend on
the outside temperature and the length of time
that has elapsed since your 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.
You can switch from English to metric units through the
Driver Information Center (DIC). If you have the Base
audio system, seeDIC Main Menu on page 3-62.Ifyou
have the Navigation system, see “Setup Menu” in the
Index of the CTS Navigation System Owner Manual.
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The air-conditioning system removes moisture from the
air, so you may sometimes notice a small amount of
water dripping underneath your vehicle while idling
or after turning off the engine. This is normal.
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.
Manual Operation
yNz(Mode):Pressing the mode switch and
changing the mode cancels automatic operation and
places the system in manual mode. Press AUTO
to return to automatic operation.
The outboard air outlets will always receive
airow regardless of the mode selected. SeeOutlet
Adjustment on page 3-31to change this airow from the
outboard outlets.
To change the current mode, select one of the following:
Y(Vent):This mode directs air to the instrument
panel outlets.
\(Bi-Level):This mode directs approximately half of
the air to the instrument panel outlets, and then
directs most of the remaining air to the oor outlets.
Some air may be directed toward the windshield.
In automatic operation, cooler air is directed to the upper
outlets and warmer air to the oor outlets.
[(Floor):This mode directs most of the air to the
oor outlets with some air directed to the outboard
outlets (for the side windows), and a little air directed to
the windshield.
The mode switch can also be used to select the defog
mode. Information on defogging and defrosting can
be found later in this section.
yAz(Fan):Press this switch to increase or
decrease the fan speed. Pressing this switch cancels
automatic operation and places the system in manual
mode. Press AUTO to return to automatic 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. For more information, see
Passenger Compartment Air Filter on page 3-32
andScheduled Maintenance on page 6-4.
h(Recirculation):This mode keeps outside air
from coming in the vehicle. It can be used to prevent
outside air and odors from entering your vehicle or to help
heat or cool the air inside your vehicle more quickly.
Press this button to turn the recirculation mode on or off.
The air-conditioning compressor also comes on.
Recirculation is not available in the defrost mode and will
automatically turn off after 10 minutes when defog is
selected.
3-28

Using recirculation for long periods of time may cause the
air inside your vehicle to become too dry or stuffy. To
prevent this from happening, after the air in your vehicle
has cooled, turn the recirculation mode off.
QPWRR(Power/Driver’s Temperature):Press the
PWR button located on the driver’s side of the
climate control panel to turn the entire climate control
system on or off. Press the up or down arrow on
the switch to increase or decrease the temperature
inside your vehicle.
QPWRR(Power/Passenger’s Temperature):Press
the PWR button located on the passenger’s side of
the climate control panel to allow the passenger’s
climate control setting to be different than the driver’s.
Press the up or down arrow on the switch to increase or
decrease the temperature for the front passenger.
A/C OFF (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.
Sensors
There is a solar sensor located on the instrument panel,
near the windshield.
3-29

There is also an interior
temperature sensor
located to the right of the
steering wheel on the
instrument panel.
These sensors monitor the solar radiation and the air
inside your vehicle, then use the information to maintain
the selected temperature by initiating needed
adjustments to the temperature, the fan speed and the
air delivery system. The system may also supply
cooler air to the side of the vehicle facing the sun. The
recirculation mode will also be activated, as necessary.
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
your 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, oor outlets and side windows. When you
select this mode, the system turns off recirculation
and runs the air-conditioning compressor unless
the outside temperature is at or below freezing. The
recirculation mode is cancelled when you enter defog
mode. If you select recirculation while in defog mode, it
will be cancelled after 10 minutes.
If you have fogging on the side windows, turn the
thumbwheel on the outboard outlets to the side window
defog position. SeeOutlet Adjustment on page 3-31
for more information.
3-30

0(Defrost):Pressing defrost direts most of the
air to the windshield, with some air directed to the side
windows. In this mode, the system will automatically
turn off recirculation and run the air-conditioning
compressor, unless the outside temperature is at or
below freezing. Recirculation cannot be selected while
in the defrost mode.
This mode may also cause the fan speed and air
temperature to increase.
If you have fogging on the side windows, turn the
thumbwheel on the outboard outlets to the side window
defog position. SeeOutlet Adjustment on page 3-31
for more information. Do not drive the vehicle until all
the windows are clear.
Rear Window Defogger
The rear window defogger uses a warming grid to
remove fog or frost from the rear window.
The rear window defogger will only work when the
ignition is in ON.
=(Rear Window Defogger):Press this button 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 about 10 minutes
after the button is pressed. Or, if the vehicle’s speed
is above 30 mph (48 km/h), the rear defogger will stay
on continuously. If turned on again, the defogger
will only run for about ve minutes before turning off.
The defogger can also be turned off by pressing
the button again or by turning off the engine.
The heated outside rearview mirrors will heat to help
clear fog or frost from the surface of the mirror when the
rear window defogger button is on.
Notice:Using a razor blade or sharp object to clear
the inside rear window may damage the rear
window defogger. Repairs would not be covered by
your warranty. Do not clear the inside of the rear
window with sharp objects.
Outlet Adjustment
Use the knobs located in the center of each outlet to
change the direction of the airow. Use the thumbwheels
to open or close the outlets.
j(Side Window Defog):Turn the thumbwheel to this
symbol to use the side window defog setting. The air
coming through the outlets will be directed toward
the side windows to clear fog.
3-31

Driver Door Ajar
When this message appears on the display, it means
that the driver’s door was not closed completely.
You should make sure that the driver’s door is closed
completely.
Engine Coolant Hot – Idle Engine
This message will appear when the engine coolant
temperature is too hot. Stop and allow the vehicle to idle
until it cools down.
Notice:If you drive your vehicle while the engine is
overheating, severe engine damage may occur. If
an overheat warning appears on the instrument
panel cluster and/or DIC, stop the vehicle as soon
as possible. Do not increase the engine speed above
normal idling speed. SeeEngine Overheating on
page 5-28for more information.
Engine Coolant Hot – AC
(Air Conditioning) Off
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.
When the coolant temperature returns to normal, the air
conditioning compressor will turn back on. You can
continue to drive your vehicle.
If this message continues to appear, have the system
repaired by your GM dealer as soon as possible to avoid
damage to the engine or transmission.
Engine Overheated – Stop Engine
This message will appear when the engine has
overheated. Stop the vehicle and turn the engine off
immediately to avoid severe engine damage. See
Engine Overheating on page 5-28. A chime will also
sound when this message is displayed.
Notice:If you drive your vehicle while the engine is
overheating, severe engine damage may occur. If
an overheat warning appears on the instrument
panel cluster and/or DIC, stop the vehicle as soon
as possible. Do not increase the engine speed above
normal idling speed. SeeEngine Overheating on
page 5-28for more information.
3-69

Right Rear Door Ajar
When this message appears on the display, the right
rear door it means that the passenger’s side rear
door was not closed completely. You should check to
make sure that the door is closed completely.
Service AC (Air Conditioning) System
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 by your GM dealer if you notice a drop
in heating and air conditioning efficiency.
Service Air Bag
There is a problem with the airbag system when this
message appears. Have your vehicle serviced by your
GM dealer immediately. SeeAirbag Readiness Light
on page 3-38for more information.
Service Charging System
This message will display when a problem with the
charging system has been detected. Have your vehicle
serviced by your GM dealer.
Service Electrical System
This message will display if an electrical problem has
occurred within the Powertrain Control Module (PCM) or
the ignition switch. Have your vehicle serviced by
your GM dealer.
Service Fuel System
The Powertrain Control Module (PCM) has detected a
problem within the fuel system when this message
appears. Have your vehicle serviced by your GM dealer.
Service Idle Control
A problem with the idle control has occurred when this
message displays. Have your vehicle serviced by
your GM dealer.
Service Stability System Message
Your vehicle may be equipped with a vehicle stability
enhancement system called StabiliTrak®.
SeeStabiliTrak
®System on page 4-11. The Service
Stability System message will be displayed if there has
been a problem detected with StabiliTrak
®.
If the Service Stability System message comes on while
you are driving, pull off the road as soon as possible
and stop carefully. Try resetting the system by turning
the ignition off then back on. If the Service Stability
System message still stays on or comes back on again
while you are driving, your vehicle needs service.
Have the StabiliTrak
®System inspected by your
GM dealer as soon as possible.
3-71

Tire Size
The following illustration shows an example of a typical
passenger vehicle tire size.
(A) Passenger (P-Metric) Tire:The United States
version of a metric tire sizing system. The letter P as
the rst character in the tire size means a passenger
vehicle tire engineered to standards set by the U.S.
Tire and Rim Association.
(B) Tire Width:The three-digit number indicates the
tire section width in millimeters from sidewall to sidewall.
(C) Aspect Ratio:A two-digit number that indicates
the tire height-to-width measurements. For example,
if the tire size aspect ratio is 60, as shown in item C of
the illustration, it would mean that the tire’s sidewall
is 60 percent as high as it is wide.(D) Construction Code:A letter code is used to
indicate the type of ply construction in the tire. The
letter R means radial ply construction; the letter D means
diagonal or bias ply construction; and the letter B means
belted-bias ply construction.
(E) Rim Diameter:Diameter of the wheel in inches.
(F) Service Description:These characters represent
the load range and speed rating of the tire. The load
index represents the load carry capacity a tire is certied
to carry. The load index can range from 1 to 279. The
speed rating is the maximum speed a tire is certied
to carry a load. Speed ratings range from A to Z.
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.
5-58

Capacities and Specications
The following approximate capacities are given in English and metric conversions. SeeRecommended Fluids and
Lubricants on page 6-12for more information.
ApplicationCapacities
English Metric
Air Conditioning Refrigerant R134a 1.3 lbs 0.59 kg
Cooling System
2.8L HFV6
3.6L HFV6
5.7L V810.6 quarts
12.0 quarts
13.4 quarts10.0 L
11.3 L
12.7 L
Engine Oil with Filter 6.0 quarts 5.7 L
Fuel Tank 17.5 gallons 66.2 L
Transmission
Automatic
6-Speed Manual – CTS
6-Speed Manual – CTS-V9.0 quarts
1.9 quarts
3.7 quarts8.5 L
1.8 L
3.5 L
Wheel Nut Torque 100 ft lb (140Y)
All capacities are approximate. When adding, be sure to ll to the approximate level, as recommended in this
manual. Recheck uid level after lling.
5-107

Additional Required Services (cont’d)
Service and Miles (Kilometers)25,000
(41 500)50,000
(83 000)75,000
(125 000)100,000
(166 000)125,000
(207 500)150,000
(240 000)
Replace fuel lter.An Emission
Control Service.•
Replace spark plugs.An Emission
Control Service.•
Engine cooling system service (or every
ve years, whichever occurs rst).
An Emission Control Service. See
footnote (i).•
Inspect engine accessory drive belt.An
Emission Control Service.•
Maintenance Footnotes
(a)Visually inspect brake lines and hoses for proper
hook-up, binding, leaks, cracks, chang, etc. Inspect
disc brake pads for wear and rotors for surface
condition. Inspect other brake parts, including calipers,
parking brake, etc.
(b)Visually inspect front and rear suspension and
steering system for damaged, loose, or missing parts or
signs of wear. Inspect power steering lines and hoses
for proper hook-up, binding, leaks, cracks, chang, etc.(c)Visually inspect hoses and have them replaced if
they are cracked, swollen, or deteriorated. Inspect
all pipes, ttings and clamps; replace with genuine
GM parts as needed. To help ensure proper operation,
a pressure test of the cooling system and pressure
cap and cleaning the outside of the radiator and
air conditioning condenser is recommended at least
once a year.
(d)Visually inspect wiper blades for wear or cracking.
Replace blade inserts that appear worn or damaged
or that streak or miss areas of the windshield.
6-7