warning light CADILLAC DTS 2009 1.G Owner's Guide

SERVICE A/C SYSTEM
This message displays when the air delivery mode door
or 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 you notice a drop in heating and air conditioning
efficiency.
SERVICE BATTERY CHARGING
SYSTEM
This message displays when a problem with the
charging system has been detected. The charging
system light also displays on the instrument panel
cluster. SeeCharging System Light on page 3-56
for more information. Have your vehicle serviced by
your dealer/retailer.
SERVICE BRAKE ASSIST
This message displays if there is a problem with the
brake system. The brake system warning light and
the antilock brake system warning light may also be
displayed on the instrument panel cluster. SeeBrake
System Warning Light on page 3-56andAntilock BrakeSystem (ABS) Warning Light on page 3-57for more
information. If this happens, stop as soon as possible and
turn off the vehicle. Restart the vehicle and check for the
message on the DIC display. If the message is displayed
or appears again when you begin driving, the brake
system needs service. See your dealer/retailer as soon
as possible. SeeBrakes on page 5-33for more
information.
SERVICE BRAKE SYSTEM
This message displays if the ignition is on to inform the
driver that the brake uid level is low. Have the brake
system serviced by your dealer/retailer as soon as
possible.
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. SeeLane Departure
Warning (LDW) on page 2-49for more information.
3-80

SERVICE SUSPENSION SYS (System)
This message displays when the magnetic ride
control or automatic leveling control system is not
operating properly. Have your vehicle serviced by
your dealer/retailer.
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/retailer before turning off
the engine. SeePASS-Key
®III+ Electronic Immobilizer
Operation on page 2-23for more information.
SERVICE TIRE MONITOR SYSTEM
On vehicles with the Tire Pressure Monitor System
(TPMS), this message displays if a part on the TPMS
is not working properly. The tire pressure light
also ashes and then remains on during the same
ignition cycle. SeeTire Pressure Light on page 3-60.
Several conditions may cause this message to appear.
SeeTire Pressure Monitor Operation on page 5-61for
more information. If the warning comes on and stays
on, there may be a problem with the TPMS, see your
dealer/retailer.
SERVICE TRACTION CONTROL
This message displays when there is a problem with the
Traction Control System (TCS). When this message is
displayed, the system will not limit wheel spin. Adjust your
driving accordingly. See your dealer/retailer for service.
SeeTraction Control System (TCS) on page 4-6for more
information.
SERVICE TRANSMISSION
This message displays when there is a problem with the
vehicle’s transmission. Have your vehicle serviced by
your dealer/retailer.
SERVICE VEHICLE SOON
This message displays when a non-emissions related
malfunction occurs. Have your vehicle serviced by your
dealer/retailer as soon as possible.
SET SPD (Speed)
If your vehicle has Adaptive Cruise Control (ACC),
this message displays whenever the cruise control is
set. First, the “CRUISE SET TO XXX MPH (km/h)”
message appears. After a few seconds, the “CRUISE
SET TO XXX MPH (km/h)” message clears and the
message “SET SPD XX” displays at the bottom of the
DIC. See “CRUISE SET TO XXX MPH (km/h)” earlier in
this section andAdaptive Cruise Control on page 3-19
for more information.
3-82

SIDE BLIND ZONE ALERT
SYSTEM OFF
If your vehicle has the Side Blind Zone Alert (SBZA)
system, this message displays when the SBZA system
has been turned off. SeeSide Blind Zone Alert (SBZA) on
page 2-45andDIC Operation and Displays on page 3-68
for more information.
SIDE BLIND ZONE SYSTEM
UNAVAILABLE
If your vehicle has the Side Blind Zone Alert (SBZA)
system, this message displays when the SBZA system is
disabled because the sensor is blocked and cannot
detect vehicles in your blind zone. The sensor may be
blocked by mud, dirt, snow, ice, or slush. This message
may also display during heavy rain or due to road spray.
It may also come on when driving in isolated areas with
no guardrails, trees, or road signs and light traffic. Your
vehicle does not need service. For cleaning instructions,
seeWashing Your Vehicle on page 5-90. SeeSide Blind
Zone Alert (SBZA) on page 2-45for more information.
SPEED LIMIT XXX MPH (km/h)
This message displays when the Speed Alert has been
turned on through the DIC Information Menu and the
vehicle is at or above the speed limit. SeeDIC Operation
and Displays on page 3-68for more information.
SPEED LIMITED TO XXX MPH (km/h)
This message displays when your vehicle speed
is limited to 80 mph (128 km/h) because the vehicle
detects a problem in the speed variable assist steering,
magnetic ride control, or automatic leveling control
systems. Have your vehicle serviced by your
dealer/retailer.
STABILITRAK NOT READY
If your vehicle has StabiliTrak, this message may
display and the Traction Control System and StabiliTrak
Warning Light on the instrument panel cluster may
be on after rst driving the vehicle and exceeding
19 mph (30 km/h) for 30 seconds. The StabiliTrak
system is not functional until the light has turned off.
SeeStabiliTrak
®System on page 4-6for more
information.
3-83

Braking
SeeBrake System Warning Light on page 3-56.
Braking action involves perception time and reaction
time. Deciding to push the brake pedal is perception
time. Actually doing it is reaction time.
Average reaction time is about three-fourths of a
second. But that is only an average. It might be less
with one driver and as long as two or three seconds or
more with another. Age, physical condition, alertness,
coordination, and eyesight all play a part. So do alcohol,
drugs, and frustration. But even in three-fourths of a
second, a vehicle moving at 60 mph (100 km/h) travels
66 feet (20 m). That could be a lot of distance in an
emergency, so keeping enough space between
the vehicle and others is important.
And, of course, actual stopping distances vary greatly
with the surface of the road, whether it is pavement
or gravel; the condition of the road, whether it is
wet, dry, or icy; tire tread; the condition of the brakes;
the weight of the vehicle; and the amount of brake force
applied.
Avoid needless heavy braking. Some people drive
in spurts — heavy acceleration followed by heavy
braking — rather than keeping pace with traffic. This is a
mistake. The brakes might not have time to cool between
hard stops. The brakes will wear out much faster with alot of heavy braking. Keeping pace with the traffic and
allowing realistic following distances eliminates a lot of
unnecessary braking. That means better braking and
longer brake life.
If the engine ever stops while the vehicle is being driven,
brake normally but do not pump the brakes. If the brakes
are pumped, the pedal could get harder to push down.
If the engine stops, there will still be some power brake
assist but it will be used when the brake is applied. Once
the power assist is used up, it can take longer to stop and
the brake pedal will be harder to push.
Adding non-dealer/non-retailer accessories can affect
vehicle performance. SeeAccessories and Modifications
on page 5-3.
Antilock Brake System (ABS)
This vehicle has the Antilock Brake System (ABS), an
advanced electronic braking system that helps prevent a
braking skid.
When the engine is started and the vehicle begins to
drive away, ABS checks itself. A momentary motor
or clicking noise might be heard while this test is going
on, and it might even be noticed that the brake pedal
moves a little. This is normal.
4-4

If there is a problem with
ABS, this warning light
stays on. SeeAntilock
Brake System (ABS)
Warning Light on
page 3-57.
Let us say the road is wet and you are driving safely.
Suddenly, an animal jumps out in front of you. You slam
on the brakes and continue braking. Here is what
happens with ABS:
A computer senses that the wheels are slowing down.
If one of the wheels is about to stop rolling, the computer
will separately work the brakes at each front wheel
and at both rear wheels.
ABS can change the brake pressure to each wheel, as
required, faster than any driver could. This can help
the driver steer around the obstacle while braking hard.
As the brakes are applied, the computer keeps receiving
updates on wheel speed and controls braking pressure
accordingly.
Remember: ABS does not change the time needed to get
a foot up to the brake pedal or always decrease stopping
distance. If you get too close to the vehicle in front of you,
there will not be enough time to apply the brakes if that
vehicle suddenly slows or stops. Always leave enough
room up ahead to stop, even with ABS.Using ABS
Do not pump the brakes. Just hold the brake pedal
down rmly and let antilock work. The antilock pump or
motor operating might be heard and the brake pedal
might be felt to pulsate, but this is normal.
Braking in Emergencies
ABS allows the driver to steer and brake at the same
time. In many emergencies, steering can help more than
even the very best braking.
Brake Assist
This vehicle has a Brake Assist feature designed to
assist the driver in stopping or decreasing vehicle speed
in emergency driving conditions. This feature uses the
stability system hydraulic brake control module to
supplement the power brake system under conditions
where the driver has quickly and forcefully applied
the brake pedal in an attempt to quickly stop or slow
down the vehicle. The stability system hydraulic
brake control module increases brake pressure at each
corner of the vehicle until the ABS activates. Minor
brake pedal pulsations or pedal movement during this
time is normal and the driver should continue to
apply the brake pedal as the driving situation dictates
The Brake Assist feature will automatically disengage
when the brake pedal is released or brake pedal
pressure is quickly decreased.
4-5

StabiliTrak®System
The vehicle may have the StabiliTrak system which
combines antilock brake, traction and stability control
systems and helps the driver maintain directional control
of the vehicle in most driving conditions. This is
accomplished by selectively applying any one of the
vehicle’s brakes and reducing engine power.
The StabiliTrak system comes on automatically
whenever the vehicle is started. The system cannot be
turned off.
This light will ash when
the system is operating.
The STABILITRAK NOT READY message may be
displayed in the Driver Information Center (DIC) and the
Traction Control System (TCS)/StabiliTrak warning
light on the instrument panel cluster comes on after rst
driving the vehicle and exceeding 19 mph (30 km/h)
for 30 seconds. The StabiliTrak system is off until the
light has turned off. This could take up to 15 minutes.The TCS/StabiliTrak warning light on the instrument
panel cluster will ash when the system is operating.
SeeTraction Control System (TCS) Warning Light
on page 3-58andStabiliTrak®Indicator Light on
page 3-58for more information. The system may be
heard or felt while it is working. This is normal.
The SERVICE STABILITRAK message is displayed and
the TCS/StabiliTrak warning light on the instrument panel
cluster comes on if there is a problem with the system.
When this light and the SERVICE STABILITRAK
message are on, the system is not working. Adjust your
driving accordingly.
Traction Control System (TCS)
The vehicle has a Traction Control System (TCS) that
limits wheel spin. This is especially useful in slippery
road conditions. The system operates only if it senses
that the front wheels are spinning too much or beginning
to lose traction. When this happens, the system works
the front brakes and reduces engine power (by closing
the throttle and managing engine spark) to limit
wheel spin.
4-6

The TCS and StabiliTrak®
light will ash when the
system is limiting
wheel spin.
The system may be heard or felt while it is working, but
this is normal. SeeTraction Control System (TCS)
Warning Light on page 3-58for more information.
If the vehicle is in cruise control when TCS begins to
limit wheel spin, the cruise control will automatically
disengage. The cruise control may be re-engaged when
road conditions allow. SeeCruise Control on page 3-16.
The SERVICE TRACTION CONTROL message in
the DIC and the TCS/StabiliTrak warning light comes on
if there is a problem with the traction control system.
SeeDIC Warnings and Messages on page 3-73.
When this light and the SERVICE TRACTION
CONTROL message are on, the system will not limit
wheel spin. Adjust your driving accordingly.To turn the system off or
on, press and release this
button located in front
of the shift lever.
TCS automatically comes on whenever the vehicle is
started. To limit wheel spin, especially in slippery
road conditions, always leave the system turned on.
TCS can be turned off if needed.
The system can be turned on or off at any time by
pressing the TCS button. The DIC will display
TRACTION CONTROL OFF when the button is pressed,
and part of the traction control system is disabled.
The vehicle will still have brake-traction control, but will
not be able to use the engine speed management
system. System noises may be heard as a result of the
brake-traction control working. If the controller detects
excessive wheel spin in this mode, the TCS/StabiliTrak
light may blink.
It is recommended to leave the system on for normal
driving conditions, but it may be necessary to turn
the system off if the vehicle is stuck in sand, mud, ice or
snow, and you want to “rock” the vehicle to attempt to
free it. SeeIf Your Vehicle is Stuck in Sand, Mud, Ice, or
Snow on page 4-18.
4-7

{CAUTION:
Wet brakes can cause crashes. They might not
work as well in a quick stop and could cause
pulling to one side. You could lose control of the
vehicle.
After driving through a large puddle of water or a
car/vehicle wash, lightly apply the brake pedal until
the brakes work normally.
Flowing or rushing water creates strong forces.
Driving through owing water could cause your
vehicle to be carried away. If this happens, you
and other vehicle occupants could drown. Do not
ignore police warnings and be very cautious about
trying to drive through owing water.
Hydroplaning
Hydroplaning is dangerous. Water can build up under
your vehicle’s tires so they actually ride on the
water. This can happen if the road is wet enough and
you are going fast enough. When your vehicle is
hydroplaning, it has little or no contact with the road.
There is no hard and fast rule about hydroplaning.
The best advice is to slow down when the road is wet.
Other Rainy Weather Tips
Besides slowing down, other wet weather driving tips
include:
Allow extra following distance.
Pass with caution.
Keep windshield wiping equipment in good shape.
Keep the windshield washer uid reservoir lled.
Have good tires with proper tread depth. SeeTires
on page 5-48.
Turn off cruise control.
4-13

Service............................................................5-3
Accessories and Modications..........................5-3
California Proposition 65 Warning.....................5-4
California Perchlorate Materials Requirements.....5-4
Doing Your Own Service Work.........................5-4
Adding Equipment to the Outside of
the Vehicle.................................................5-5
Fuel................................................................5-5
Gasoline Octane............................................5-5
Gasoline Specications....................................5-5
California Fuel...............................................5-5
Additives.......................................................5-6
Fuels in Foreign Countries...............................5-7
Filling the Tank..............................................5-7
Filling a Portable Fuel Container.......................5-9
Checking Things Under the Hood....................5-10
Hood Release..............................................5-11
Engine Compartment Overview.......................5-12
Engine Oil...................................................5-13
Engine Oil Life System..................................5-16
Engine Air Cleaner/Filter................................5-17
Automatic Transmission Fluid.........................5-19
Cooling System............................................5-22
Engine Coolant.............................................5-23
Coolant Surge Tank Pressure Cap..................5-27
Engine Overheating.......................................5-28Overheated Engine Protection
Operating Mode........................................5-30
Power Steering Fluid.....................................5-31
Windshield Washer Fluid................................5-32
Brakes........................................................5-33
Battery........................................................5-36
Jump Starting...............................................5-38
Headlamp Aiming...........................................5-43
Bulb Replacement..........................................5-46
High Intensity Discharge (HID) Lighting............5-46
Windshield Wiper Blade Replacement..............5-46
Tires..............................................................5-48
Tire Sidewall Labeling...................................5-49
Tire Terminology and Denitions.....................5-54
Ination - Tire Pressure.................................5-57
High-Speed Operation...................................5-59
Tire Pressure Monitor System.........................5-60
Tire Pressure Monitor Operation.....................5-61
Tire Inspection and Rotation...........................5-65
When It Is Time for New Tires.......................5-67
Buying New Tires.........................................5-68
Different Size Tires and Wheels......................5-69
Uniform Tire Quality Grading..........................5-70
Wheel Alignment and Tire Balance..................5-71
Wheel Replacement......................................5-71
Section 5 Service and Appearance Care
5-1

The TIGHTEN GAS CAP message displays on the
Driver Information Center (DIC) if the fuel cap is
not properly installed. SeeDIC Warnings and Messages
on page 3-73for more information.
{CAUTION:
If a re starts while you are refueling, do not
remove the nozzle. Shut off the ow of fuel by
shutting off the pump or by notifying the station
attendant. Leave the area immediately.
Notice:If you need a new fuel cap, be sure to get
the right type. Your dealer/retailer can get one
for you. If you get the wrong type, it may not t
properly. This may cause the malfunction indicator
lamp to light and may damage the fuel tank and
emissions system. SeeMalfunction Indicator Lamp
on page 3-61.
Filling a Portable Fuel Container
{CAUTION:
Never ll a portable fuel container while it is in
the vehicle. Static electricity discharge from the
container can ignite the fuel vapor. You can be
badly burned and the vehicle damaged if this
occurs. To help avoid injury to you and others:
Dispense fuel only into approved containers.
Do not ll a container while it is inside a
vehicle, in a vehicle’s trunk, pickup bed, or on
any surface other than the ground.
Bring the ll nozzle in contact with the inside
of the ll opening before operating the nozzle.
Contact should be maintained until the lling
is complete.
Do not smoke while pumping fuel.
Do not use a cellular phone while
pumping fuel.
5-9