air conditioning CADILLAC CTS 2012 2.G Owners Manual

Black plate (5,1)Cadillac CTS/CTS-V Owner Manual (Include Mex) - 2012
Introduction v
Vehicle Symbol Chart
Here are some additional symbols
that may be found on the vehicle
and what they mean. For more
information on the symbol, refer to
the Index.
9:Airbag Readiness Light
#:Air Conditioning
!:Antilock Brake System (ABS)
%:Audio Steering Wheel Controls
or OnStar®
$: Brake System Warning Light
":Charging System
I:Cruise Control
B: Engine Coolant Temperature
O:Exterior Lamps
#:Fog Lamps
.: Fuel Gauge
+:Fuses
3: Headlamp High/Low-Beam
Changer
(: Heated Steering Wheel
j:LATCH System Child
Restraints
*: Malfunction Indicator Lamp
::Oil Pressure
}:Power
/:Remote Vehicle Start
>:Safety Belt Reminders
7:Tire Pressure Monitor
d:Traction Control/Stabilitrak®
M:Windshield Washer Fluid

Black plate (15,1)Cadillac CTS/CTS-V Owner Manual (Include Mex) - 2012
In Brief 1-15
Wagon Model
Pull the lever toward you to spray
washer fluid on the windshield. The
spray continues until the lever is
released. The wipers will run a few
times.
SeeWindshield Wiper/Washer on
page 5‑4 andRear Window Wiper/
Washer on page 5‑6 (if equipped).Climate Controls
The heating, cooling, and ventilation for the vehicle can be controlled with
this system.
A. Display
B. Fan
C. Power
D. AUTO (Automatic Operation)
E. PASS (Passenger Climate
Control)
F. Defrost
G. Air Delivery Mode H. Temperature and Heated/
Ventilated Seat
I. Air Conditioning
J. Recirculation
K. Outside Air
L. Rear Window Defogger
See Dual Automatic Climate Control
System on page 8‑1.

Black plate (35,1)Cadillac CTS/CTS-V Owner Manual (Include Mex) - 2012
Instruments and Controls 5-35
Engine Cooling System
Messages
ENGINE HOT A/C (AIR
CONDITIONING) OFF
This message displays when the
engine coolant becomes hotter than
the normal operating temperature.
SeeEngine Coolant Temperature
Gauge on page 5‑16. To avoid
added strain on a hot engine,
the air conditioning compressor
automatically turns off. When the
coolant temperature returns to
normal, the air conditioning
compressor turns back on. You
can continue to drive the vehicle.
If this message continues to appear,
have the system repaired by your
dealer as soon as possible to avoid
damage to the engine.
ENGINE OVERHEATED IDLE
ENGINE
Notice: If you drive the 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.
See Engine Overheating on
page 10‑23 for more information.
This message displays when the
engine coolant temperature is too
hot. Stop and allow the vehicle
to idle until it cools down. If the
message does not clear in a
few minutes or if the overheat light
stays on, shut the vehicle off and
have it serviced before driving
again. See Engine Coolant
Temperature Warning Light on
page 5‑24. See
Overheated Engine Protection
Operating Mode on page 10‑24 for
information on driving to a safe
place in an emergency.
Engine Oil Messages
CHANGE ENGINE OIL SOON
When this message displays, it
means that service is required
for the vehicle. See your dealer.
See Maintenance Schedule on
page 11‑3 andEngine Oil on
page 10‑10 for more information.
When you reset the CHANGE
ENGINE OIL SOON message by
clearing it from the display, you still
must reset the engine oil life system
separately. For more information on
resetting the engine oil life system,
see Engine Oil Life System on
page 10‑12.
ENGINE OIL LOW ADD OIL
If the vehicle has an oil level sensor,
this message displays if the oil level
in the vehicle is low. Check the oil
level and correct it as necessary.

Black plate (43,1)Cadillac CTS/CTS-V Owner Manual (Include Mex) - 2012
Instruments and Controls 5-43
Airbag System Messages
SERVICE AIR BAG
This message displays when there
is a problem with the airbag system.
Have the vehicle serviced by your
dealer immediately. SeeAirbag
Readiness Light on page 5‑17 for
more information.
Anti-theft Alarm System
Messages
SERVICE THEFT DETERRENT
SYSTEM
This message displays when there
is a problem with the theft-deterrent
system programmed in the key.
A fault has been detected in the
system which means that the
system is disabled and it is not
protecting the vehicle. The vehicle
usually restarts; however, you may
want to take the vehicle to your
dealer before turning off the engine.
See Immobilizer Operation (Key
Access) on page 2‑25 orImmobilizer Operation (Keyless
Access) on page 2‑26
for more
information.
START ABORTED BY THEFT
DETERRENT
This message displays if there is a
communication problem between
the keyless access system and the
vehicle. The vehicle cannot be
started when this message displays.
See your dealer for service.
THEFT ATTEMPTED
This message displays if the
theft-deterrent system has detected
a break-in attempt while you were
away from the vehicle. See
Anti-theft Alarm System on
page 2‑24 for more information.
Service Vehicle Messages
SERVICE A/C 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.
SERVICE VEHICLE SOON
This message displays when a
non-emissions related malfunction
occurs. Have the vehicle serviced
by your dealer as soon as possible.
Tire Messages
SERVICE TIRE MONITOR
SYSTEM
This message displays if a part on
the Tire Pressure Monitor System
(TPMS) is not working properly. The
tire pressure light also flashes and
then remains on during the same
ignition cycle. See
Tire Pressure
Light on page 5‑25. Several
conditions may cause this message
to appear. See Tire Pressure
Monitor Operation on page 10‑73 for
more information. If the warning

Black plate (1,1)Cadillac CTS/CTS-V Owner Manual (Include Mex) - 2012
Climate Controls 8-1
Climate Controls
Climate Control Systems
Dual Automatic Climate ControlSystem . . . . . . . . . . . . . . . . . . . . . . 8-1
Air Vents
Air Vents . . . . . . . . . . . . . . . . . . . . . . 8-6
Maintenance
Passenger Compartment AirFilter . . . . . . . . . . . . . . . . . . . . . . . . . 8-6
Climate Control Systems
Dual Automatic Climate Control System
The heating, cooling, and ventilation for the vehicle can be controlled with
this system.
A. Display
B. Fan
C. Power
D. AUTO (Automatic Operation)
E. PASS (Passenger Climate
Control) F. Defrost
G. Air Delivery Mode
H. Temperature and Heated/
Ventilated Seat
I. Air Conditioning
J. Recirculation

Black plate (2,1)Cadillac CTS/CTS-V Owner Manual (Include Mex) - 2012
8-2 Climate Controls
K. Outside Air
L. Rear Window Defogger
Automatic Operation
AUTO (Automatic):The system
automatically controls fan speed, air
delivery, and air conditioning in
order to heat or cool the vehicle to
the desired temperature. When the
indicator light is on, the system is in
full automatic operation. If the air
delivery mode or fan setting is
manually adjusted, the auto
indicator turns off and displays will
show the selected settings.
1. Press the AUTO button.
2. Adjust the temperature to a comfortable setting between
21°C (70°F) and 27°C (80°F).
Choosing the coldest or warmest
temperature setting will not
cause the system to heat or cool
any faster.
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 floor, 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.
English can be changed to metric
units through the Driver Information
Center (DIC). See Driver
Information Center (DIC) on
page 5‑27.
Q/R(Temperature Control): The
temperature can be adjusted
separately for the driver and the
passenger. Press to increase or
decrease the automatic temperature
settings. PASS (Passenger Climate
Control):
Press to set a different
temperature for the passenger.
Then adjust the passenger
temperature buttons to a
comfortable setting.
Pressing the PASS button again
automatically sets the passenger's
temperature to the driver's setting.
Turning the passenger's
temperature display off does not
shut the passenger's climate control
system off.
Manual Operation
O(Power): Press to turn the
climate control system on or off.
When the climate control system is
turned off the air inlet defaults to
outside air.
D C(Fan Control): Press the
buttons to increase or decrease the
fan speed. Pressing either button
cancels automatic fan control. Press
AUTO to return to automatic

Black plate (3,1)Cadillac CTS/CTS-V Owner Manual (Include Mex) - 2012
Climate Controls 8-3
operation. The blower may reduce
during an Onstar®session to limit
background noise.
If the airflow seems low when the
fan speed is at the highest setting,
the passenger compartment air filter
might need to be replaced. For more
information, see Passenger
Compartment Air Filter on page 8‑6
and Maintenance Schedule on
page 11‑3.
H G(Air Delivery Mode Control):
Press the buttons to change the
direction of the airflow. The current
mode appears in the display screen.
Changing the mode cancels the
automatic air delivery. Press AUTO
to return to automatic operation.
The outboard air outlets always
receive some airflow in every mode,
except defrost.
To change the current mode, select
one of the following:
Y(Vent): Air is directed to the
instrument panel outlets.
\(Bi-Level): Air is divided
between the instrument panel
outlets and the floor outlets. In
automatic operation, cooler air is
directed to the upper outlets and
warmer air to the floor outlets.
[(Floor): Air is directed to the
floor outlets, with some air directed
to the windshield and outboard
outlets.
-(Defog): This mode clears the
windows of fog or moisture. Air is
directed to the windshield, floor, and
side window 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 defog mode, it is
cancelled after 10 minutes.
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. In this mode, the
system automatically turns off recirculation and runs the
air-conditioning compressor, unless
the outside temperature is at or
below freezing.
This mode can also cause the fan
speed and air temperature to
increase.
#(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 needed.
The air conditioning system
removes moisture from the air, so
water might drip under the vehicle
while idling or after turning off the
engine. This is normal.
M(Recirculation): Press to turn
on recirculation. An indicator light
comes on. Air is recirculated inside
the vehicle. It helps to quickly cool
the air inside the vehicle or prevent
outside air and odors from entering.
Press the AUTO button to have the
system select the best air delivery
mode for the temperature setting.

Black plate (24,1)Cadillac CTS/CTS-V Owner Manual (Include Mex) - 2012
10-24 Vehicle Care
If No Steam Is Coming from
the Engine Compartment
If an engine overheat warning is
displayed but no steam can be seen
or heard, the problem may not be
too serious. Sometimes the engine
can get a little too hot when the
vehicle:
.Climbs a long hill on a hot day.
.Stops after high-speed driving.
.Idles for long periods in traffic.
.Tows a trailer.
If the overheat warning is displayed
with no sign of steam:
1. Turn the air conditioning off.
2. Turn the heater on to the highest temperature and to the highest
fan speed. Open the windows as
necessary. 3. In heavy traffic, let the engine
idle in N (Neutral) while stopped.
If it is safe to do so, pull off the
road, shift to P (Park) or
N (Neutral) and let the
engine idle.
If the temperature overheat gauge
is no longer in the overheat zone
or an overheat warning no longer
displays, the vehicle can be driven.
Continue to drive the vehicle slow
for about 10 minutes. Keep a safe
vehicle distance from the car in front
of you. If the warning does not come
back on, continue to drive normally.
If the warning continues, pull over,
stop, and park the vehicle
right away.
If there is no sign of steam, idle
the engine for three minutes while
parked. If the warning is still
displayed, turn off the engine until it
cools down. Also, see “Overheated
Engine Protection Operating Mode”
next in this section.
Overheated Engine
Protection
Operating Mode
This operating mode allows the
vehicle to be driven to a safe place
in an emergency. Should a hot
engine condition exist, an overheat
protection mode which alternates
firing groups of cylinders helps
prevent engine damage. In this
mode, there is a loss in power
and engine performance. Driving
extended distances and/or towing a
trailer in the overheat protection
mode should be avoided.
Power Steering Fluid
See Engine Compartment Overview
on page 10‑6 for the location of the
power steering fluid reservoir.

Black plate (42,1)Cadillac CTS/CTS-V Owner Manual (Include Mex) - 2012
10-42 Vehicle Care
Mini‐Fuses Usage27 Body Control
Module 4
28 Navigation Motor
29 All-Wheel Drive
30 Transmission
Control Module
Battery
31 Horn
33 Left Low‐Beam
Headlamp
(Domestic
Non‐HID Only)
34 Pedestrian
Protection System
(Export Only)
35 Body Control
Module 3
36 Body Control
Module 2
38 Headlamp Washer
(HID Only) Mini‐Fuses Usage
40 Right Low‐Beam
Headlamp
(Domestic
Non‐HID Only)
41 Air Conditioning
Compressor Clutch
43 Low‐Beam Daytime
Running Lamps
(non‐HID), Left
Daytime Running
Lamps (HID), Left
Trailer Turn Signal
(Export Only)
46 Left High‐Beam
Headlamp
47 Right High‐Beam
Headlamp
50 Right Daytime
Running Lamp,
Windshield
Washer Pump
51 Airbag System
Ignition Switch Mini‐Fuses Usage
52 Engine Control
Module Ignition,
Transmission
Control Module
Ignition
54 Power Moding
(Immobilizer
Module, Ignition
Switch)
55 Not Used
56 Windshield Wipers
57 Right Low‐Beam
(HID Only)
58 Daytime Running
Lamps (non‐HID),
Left Low‐Beam
(HID Only)
59 Right Daytime
Running Lamp
(HID Only), Right
Trailer Turn Signal
(Export Only)

Black plate (44,1)Cadillac CTS/CTS-V Owner Manual (Include Mex) - 2012
10-44 Vehicle Care
RelaysUsage
12 Horn
20 Headlamp Washer
(HID Only)
21 Cooling Fan
(Series/Parallel)
32 Air Conditioning
Compressor Clutch
39 Windshield
Washer Pump
42 Right Daytime
Running Lamp,
Trailer Turn Signal
44 Low‐Beam
(non‐HID), Left
Daytime Running
Lamps (HID), Left
Trailer Turn Signal
(Export Only)
45 Front Fog Lamps
(HID Only)
48 High‐Beam
Headlamps Relays
Usage
49 Daytime Running
Lamps (Non‐HID),
Low‐Beam
Headlamps (HID)
53 Not Used
63 Main Ignition
66 Windshield Wipers
67 Powertrain
68 Windshield Wipers
High Speed
Engine Compartment
Fuse Block (CTS V Coupe
and Sedan)
This fuse block is on the left side of
the engine compartment.
Lift the fuse block cover to access
the fuses.
The vehicle may not be equipped
with all of the fuses and relays
shown.
Notice:
Spilling liquid on any
electrical component on the
vehicle may damage it. Always
keep the covers on any electrical
component.