light CADILLAC CTS 2009 2.G Workshop Manual

To replace the passenger compartment air lter:
1. Turn the ignition to ON/RUN with the engine off.
2. Turn on the windshield wipers and turn the
ignition off again when the wipers are straight up
on the windshield.
This allows access to the leaf screen.
The passenger compartment air lter is located
under the screen.
3. Open the hood to access the engine compartment.
SeeHood Release on page 5-12for more
information.
4. Remove the three screws that hold the screen in
place and lift off the screen by lifting and sliding it
toward the center of the vehicle.
5. Pull out on the two tabs located on each end of the
lter cover.
6. Lift the lter cover off by pulling it straight up.
7. Remove the old lter and insert a new one.
SeeMaintenance Replacement Parts on page 6-16
for the correct part number for the lter.
8. Reverse Steps 1 through 6 to reinstall the cover.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.
3-30

Tachometer
The tachometer displays the engine speed in revolutions
per minute (rpm).
Notice:If the engine is operated with the tachometer
in the shaded warning area, the vehicle could be
damaged, and the damages would not be covered by
the vehicle warranty. Do not operate the engine with
the tachometer in the shaded warning area.The CTS-V tachometer has tracer lights that follow the
movement of the tachometer indicator. The tracer lights
can be turned off in the DIC Vehicle Customization.
SeeDIC Vehicle Customization on page 3-72for more
information.
For the CTS-V, the tracer lights also ash when it is
time to up-shift to avoid the engine speed limit.
SeeAutomatic Transmission Operation on page 2-36
orManual Transmission Operation on page 2-40
for more information.
Engine Speed Limiter
This feature prevents the engine speed from reaching
an unsafe level. If the level is too high, the throttle closes
or limits the fuel supply until the engine speed returns
to a safe level. Throttle operation and fuel supply returns
to normal when engine speed is lowered.
For the CTS-V, the tachometer tracer lights ashes prior
to reaching engine speed limit. The tracer lights also
ash on automatic transmission vehicles while in
the DSC or Tap Shift modes. United States and
Canada Automatic,
V-Series Similar
3-34

Safety Belt Reminders
Safety Belt Reminder Light
When the engine is started, a chime sounds for
several seconds to remind people to fasten their safety
belts, unless the driver’s safety belt is already buckled.
The safety belt light comes
on and stays on for
several seconds, then
ashes for several more.
This chime and light are repeated if the driver remains
unbuckled and the vehicle is in motion. If the driver’s
safety belt is already buckled, neither the chime nor the
light comes on.
Passenger Safety Belt Reminder Light
Several seconds after the engine is started, a
chime sounds for several seconds to remind the front
passenger to buckle their safety belt. This only occurs
if the passenger airbag is enabled. SeePassenger
Sensing System on page 1-67for more information.
The passenger safety belt light, located on the instrument
panel, comes on and stays on for several seconds and
then ashes for several more.
This chime and light are
repeated if the passenger
remains unbuckled and
the vehicle is in motion.
If the passenger safety belt is buckled, neither the
chime nor the light comes on.
The front passenger safety belt warning light and chime
may turn on if an object is put on the seat such as a
briefcase, handbag, or grocery bag. To turn off the
warning light and/or chime, remove the object from the
seat or buckle the safety belt.
3-35

Airbag Readiness Light
The system checks the airbag’s electrical system for
possible malfunctions. If the light stays on it indicates
there is an electrical problem. The system check
includes the airbag sensor, the pretensioners, the
airbag modules, the wiring and the crash sensing
and diagnostic module. For more information on the
airbag system, seeAirbag System on page 1-58.
The airbag readiness light
ashes for a few seconds
when the engine is
started. If the light does
not come on then, have it
xed immediately.{CAUTION:
If the airbag readiness light stays on after the
vehicle is started or comes on while driving, it
means the airbag system might not be working
properly. The airbags in the vehicle might not
inate in a crash, or they could even inate
without a crash. To help avoid injury, have the
vehicle serviced right away.
If there is a problem with the airbag system, an airbag
Driver Information Center (DIC) message can also come
on. SeeDIC Warnings and Messages on page 3-58
for more information.
3-36

Passenger Airbag Status Indicator
The vehicle has the passenger sensing system.
SeePassenger Sensing System on page 1-67for
important safety information. The instrument panel has
a passenger airbag status indicator.
When the vehicle is started, the passenger airbag status
indicator will light ON and OFF, or the symbol for on
and off, for several seconds as a system check. If you
are using remote start to start the vehicle from a
distance, if equipped, you may not see the system
check. Then, after several more seconds, the status
indicator will light either ON or OFF, or either the on
or off symbol, to let you know the status of the right
front passenger frontal airbag.If the word ON or the on symbol is lit on the passenger
airbag status indicator, it means that the right front
passenger frontal airbag is enabled (may inate).
If the word OFF or the off symbol is lit on the passenger
airbag status indicator, it means that the passenger
sensing system has turned off the right front passenger
frontal airbag.
If, after several seconds, both status indicator lights
remain on, or if there are no lights at all, there may be
a problem with the lights or the passenger sensing
system. See your dealer/retailer for service.
{CAUTION:
If the airbag readiness light ever comes on and
stays on, it means that something may be wrong
with the airbag system. To help avoid injury to
yourself or others, have the vehicle serviced right
away. SeeAirbag Readiness Light on page 3-36
for more information, including important safety
information. United States
Canada
3-37

Charging System Light
This light comes on briey
when the ignition key is
turned to START, but
the engine is not running,
as a check to show it
is working.
If it does not, have the vehicle serviced by your
dealer/retailer.
The light should go out once the engine starts. If it
stays on, or comes on while driving, there could be a
problem with the charging system. A charging system
message in the Driver Information Center (DIC) can also
appear. SeeDIC Warnings and Messages on page 3-58
for more information. This light could indicate that
there are problems with a generator drive belt, or that
there is an electrical problem. Have it checked right
away. If the vehicle must be driven a short distance with
the light on, turn off accessories, such as the radio
and air conditioner.
Up-Shift Light
The vehicle may have an
up-shift light, it shows
when to shift to the next
higher gear for best
fuel economy.
SeeManual Transmission Operation on page 2-40
for more information.
For the CTS-V, the tracer lights function as a
performance up-shift light.
These tracers ash to indicate when to shift to the
next higher gear to avoid the engine speed limit.
SeeAutomatic Transmission Operation on page 2-36
orManual Transmission Operation on page 2-40
for more information.
3-38

Brake System Warning Light
This vehicle’s hydraulic brake system is divided into
two parts. If one part is not working, the other part can
still work and stop the vehicle. For good braking both
parts need to be working well.
If the warning light comes on, there is a brake problem.
Have the brake system inspected right away.
This light should come on briey when the ignition is
turned to ON/RUN. If it does not come on then, have it
xed so it will be ready to warn if there is a problem.
When the ignition is on, the brake system warning light
will also come on when the parking brake is set.
The light will ash or stay on if the parking brake is not
fully released.If the light stays on after the parking brake is fully
released there is a base brake problem.
For vehicles with the Electric Park Brake (EPB), if the
light continues ashing after the brake is released,
or while driving, there is a problem with the Electric
Parking Brake system.
If the light comes on while driving, pull off the road and
stop carefully. The pedal may be harder to push, or
the pedal may go closer to the oor. The vehicle may
take longer to stop. If the light is still on, have the
vehicle towed for service. SeeTowing Your Vehicle
on page 4-26.
{CAUTION:
The brake system might not be working properly if
the brake system warning light is on. Driving with
the brake system warning light on can lead to a
crash. If the light is still on after the vehicle has
been pulled off the road and carefully stopped,
have the vehicle towed for service. United States
Canada
3-39

For vehicles with the Electric Park Brake (EPB), this
light should come on briey when ignition is turned
to ON/RUN. If it does not come on then, have it xed so
it will be ready to warn if there is a problem.
If this light comes on there is a problem with a system
on the vehicle that is causing the park brake system
to work at a reduced level. The vehicle can still be
driven, but should be taken to a dealer/retailer as soon
as possible.
SeeElectric Parking Brake on page 2-44for more
information.
Antilock Brake System (ABS)
Warning Light
For vehicles with the
Antilock Brake System
(ABS), this light comes on
briey when the engine
is started.
If it does not, have the vehicle serviced by your
dealer/retailer. If the system is working normally the
indicator light then goes off.
If the ABS light stays on, turn the ignition off. If the light
comes on while driving, stop as soon as it is safely
possible and turn the ignition off. Then start the engine
again to reset the system. If the ABS light stays on,
or comes on again while driving, the vehicle needs
service. If the regular brake system warning light is not
on, the vehicle still has brakes, but not antilock brakes.
If the regular brake system warning light is also on,
the vehicle does not have antilock brakes and there is a
problem with the regular brakes. SeeBrake System
Warning Light on page 3-39.
For vehicles with a Driver Information Center (DIC),
seeDIC Warnings and Messages on page 3-58for all
brake related DIC messages.
3-40

StabiliTrak®/Traction Control
System (TCS) Warning Light
The Traction Control
System (TCS)/StabiliTrak
warning light should
come on briey when
the engine is started.
If it does not, have the vehicle serviced by your
dealer/retailer. If the system is working normally the
indicator light then goes off.
If the light comes on or stays on while driving, there
may be a problem with the TCS/StabiliTrak and the
vehicle may need service. When this warning light is on,
the system does not limit wheel spin. Adjust driving
accordingly.
SeeTraction Control System (TCS) on page 4-6and
StabiliTrak
®System on page 4-6for more information.
Engine Coolant Temperature
Warning Light
The engine coolant
temperature warning light
comes on briey when
the engine is started.
If it does not, have the vehicle serviced by your
dealer/retailer. If the system is working normally the
indicator light then goes off.
If the light comes on and stays on while driving, the
vehicle may have a problem with the cooling system.
Stop the vehicle and turn off the engine as soon
as possible to avoid damage to the engine. A warning
chime sounds when this light is on.
SeeEngine Overheating on page 5-37for more
information.
3-41

Engine Coolant Temperature Gage
This gage shows the engine coolant temperature.
If the engine coolant overheats the engine coolant
temperature warning light will come on. SeeEngine
Overheating on page 5-37andEngine Coolant
Temperature Warning Light on page 3-41for more
information.
Tire Pressure Light
For vehicles with a tire
pressure light, this light
comes on briey when the
engine is started and
provides information about
tire pressures and the
Tire Pressure Monitoring
System.
When the Light is On Steady
This indicates that one or more of the tires is signicantly
underinated.
A tire pressure message in the Driver Information Center
(DIC), can accompany the light. SeeDIC Warnings and
Messages on page 3-58for more information. Stop and
check the tires as soon as it is safe to do so. If a tire is
underinated, inate to the proper pressure. SeeTires on
page 5-61for more information.
When the Light Flashes First and Then is
On Steady
This indicates that there could be a problem with the
Tire Pressure Monitor System. The light ashes for
about a minute and stays on steady for the remainder
of the ignition cycle. This sequence repeats with
every ignition cycle. SeeTire Pressure Monitor System
on page 5-71for more information. United States
Canada
3-42