wheel CADILLAC CTS 2007 1.G Service Manual

The traction control system automatically comes
on whenever you start your vehicle. To limit wheel
spin, especially in slippery road conditions, you
should always leave the system on. But you
can turn the traction control system off if you ever
need to. You should turn the system off if your
vehicle ever gets stuck in sand, mud or snow and
rocking the vehicle is required. Additionally,
turning the traction control system off on some
surfaces, such as deep snow and loose gravel,
will assist vehicle motion at lower speeds.
SeeRocking Your Vehicle to Get It Out on
page 321for more information. See alsoWinter
Driving on page 316for information on using TCS
when driving in snowy or icy conditions.
You can turn the system
off by pressing the
TC (traction control)
button located in
the glove box.If you press the TC button once, the traction
control system will turn off and the traction control
system warning light will come on. Press the
TC button again to turn the system back on. If you
press and hold the TC button for ve seconds,
the StabiliTrak
®system will turn off. Press the
TC button again to turn StabiliTrak®back on.
For more information, seeStabiliTrak®System
on page 297.
You can program your steering wheel controls
and/or the buttons on the Base audio system to
turn the TCS on or off. SeeRecongurable
Steering Wheel Controls (SWC) (CTS) on
page 169and/or “Congurable Radio Display
Keys” underRadio with CD on page 260for
programming instructions.
Adding non-GM accessories can affect your
vehicle’s performance. SeeAccessories and
Modications on page 332for more information.
294

Traction Control System (TCS)
(CTS-V)
Your 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 one or both of the rear wheels are
spinning or beginning to lose traction. When this
happens, the system brakes the spinning wheel(s)
and/or reduces engine power to limit wheel spin.
You may feel or hear the system working, but this
is normal.
This warning light will
come on to let you
know if there’s a
problem with your
traction control system.
SeeTraction Control System (TCS) Warning Light
on page 206. When this warning light is on, the
system will not limit wheel spin. Adjust your driving
accordingly.The traction control system automatically comes on
whenever you start your vehicle. To limit wheel
spin, especially in slippery road conditions, you
should always leave the system on. But you can
turn the traction control system off if you ever need
to. You should turn the system off if your vehicle
ever gets stuck in sand, mud or snow and rocking
the vehicle is required. Additionally, turning the
traction control system off on some surfaces, such
as deep snow and loose gravel, will assist vehicle
motion at lower speeds. SeeRocking Your Vehicle
to Get It Out on page 321andIf Your Vehicle is
Stuck in Sand, Mud, Ice, or Snow on page 320for
more information. See alsoWinter Driving on
page 316for information on using TCS when
driving in snowy or icy conditions.
You can turn the system
off by pressing the
TC (traction control)
button located on
the steering wheel.
295

If you press the TC button once, the traction
control system will turn off and the TCS warning
light will come on. If you press the TC button again
within ve seconds, the traction control system
will remain off, the warning light will stay on, and
the stability system will enter Competitive
Driving Mode. Competitive Driving will be displayed
on the Driver Information Center (DIC). See
Competitive Driving Mode (CTS-V) on page 296
and “Driver Information Center (DIC)” in the
Navigation Supplement for more information.
Press the TC button again to turn the system back
on. If you press and hold the TC button for
ve seconds, the StabiliTrak
®and Traction Control
systems will turn off. Press the TC button again
to turn StabiliTrak
®and Traction Control back on.
For more information, seeStabiliTrak®System
on page 297.
Adding non-GM accessories can affect your
vehicle’s performance. SeeAccessories and
Modications on page 332for more information.
Competitive Driving Mode (CTS-V)
The driver can select this optional handling
mode by pressing the Traction Control (TC) button
on the steering wheel twice within ve seconds.
COMPETITIVE DRIVING will be displayed in
the DIC. Competitive driving mode allows
the driver to have control of the power applied to
the rear wheels, while the StabiliTrak
®system
helps steer the vehicle by selective brake
application. In competitive mode, the levels at
which StabiliTrak
®is engaged have been modied
to better suit a performance driving environment.
When the traction control warning light is on,
the Traction Control System will not be operating.
Adjust your driving accordingly.
When you press the TC button again, or turn
the ignition to ACCESSORY, the TCS will
be on. The traction engaged symbol will be
displayed temporarily in the DIC and a chime
will be heard.
296

Limited-Slip Rear Axle
If your vehicle has this feature, your limited-slip
rear axle can give you additional traction on snow,
mud, ice, sand or gravel. It works like a standard
axle most of the time, but when one of the
rear wheels has no traction and the other does,
this feature will allow the wheel with traction
to move the vehicle.
StabiliTrak®System
Your vehicle may have an electronic stability
control system called StabiliTrak®.Itisan
advanced computer controlled system that assists
you with directional control of the vehicle in
difficult driving conditions.
StabiliTrak
®activates when the computer senses
a discrepancy between your intended path
and the direction the vehicle is actually traveling.
StabiliTrak
®selectively applies braking pressure
at any one of the vehicle’s brakes to help steer the
vehicle in the direction which you are steering.
When the system activates, a Stability System
Engaged message will be displayed on the
Driver Information Center. SeeDIC Warningsand Messages on page 232. You may also hear
a noise or feel vibration in the brake pedal.
This is normal. Continue to steer the vehicle in the
direction you want it to go.
If there is a problem detected with StabiliTrak
®,
a Service Stability System message will be
displayed on the Driver Information Center.
SeeDIC Warnings and Messages on page 232.
When this message is displayed, the system is not
operational. Driving should be adjusted accordingly.
StabiliTrak
®comes on automatically whenever
you start your vehicle. To help assist you with
directional control of the vehicle, you should always
leave the system on. You can turn StabiliTrak
®off if
you ever need to through the TC (traction control)
on/off button. SeeTraction Control System (TCS)
(CTS) on page 293orTraction Control System
(TCS) (CTS-V) on page 295.
If your vehicle is in cruise control when the
StabiliTrak
®activates, the cruise control will
automatically disengage. When road conditions
allow you to safely use it again, you may reengage
the cruise control. SeeCruise Control on
page 176for more information.
297

Steering Tips
It is important to take curves at a reasonable speed.
A lot of the “driver lost control” accidents
mentioned on the news happen on curves.
Here is why:
Experienced driver or beginner, each of us is
subject to the same laws of physics when driving
on curves. The traction of the tires against the
road surface makes it possible for the vehicle to
change its path when you turn the front wheels.
If there is no traction, inertia will keep the vehicle
going in the same direction. If you have ever
tried to steer a vehicle on wet ice, you will
understand this.
The traction you can get in a curve depends on
the condition of your tires and the road surface,
the angle at which the curve is banked, and
your speed. While you are in a curve, speed is the
one factor you can control.
Suppose you are steering through a sharp curve.
Then you suddenly accelerate. Both control
systems — steering and acceleration — have to
do their work where the tires meet the road.Adding the sudden acceleration can demand too
much of those places. You can lose control.
SeeTraction Control System (TCS) (CTS) on
page 293orTraction Control System (TCS)
(CTS-V) on page 295.
What should you do if this ever happens? Ease up
on the accelerator pedal, steer the vehicle the
way you want it to go, and slow down.
Speed limit signs near curves warn that you should
adjust your speed. Of course, the posted speeds
are based on good weather and road conditions.
Under less favorable conditions you will want to
go slower.
If you need to reduce your speed as you approach
a curve, do it before you enter the curve, while
your front wheels are straight ahead.
Try to adjust your speed so you can “drive” through
the curve. Maintain a reasonable, steady speed.
Wait to accelerate until you are out of the curve,
and then accelerate gently into the straightaway.
Adding non-GM accessories can affect your
vehicle’s performance. SeeAccessories and
Modications on page 332.
299

Steering in Emergencies
There are times when steering can be more
effective than braking. For example, you come
over a hill and nd a truck stopped in your lane, or
a car suddenly pulls out from nowhere, or a
child darts out from between parked cars and
stops right in front of you. You can avoid these
problems by braking — if you can stop in time.
But sometimes you cannot; there is not room.
That is the time for evasive action — steering
around the problem.
Your vehicle can perform very well in emergencies
like these. First apply your brakes.
SeeBraking on page 290. It is better to remove as
much speed as you can from a possible collision.
Then steer around the problem, to the left or
right depending on the space available.An emergency like this requires close attention
and a quick decision. If you are holding the
steering wheel at the recommended 9 and
3 o’clock positions, you can turn it a full
180 degrees very quickly without removing either
hand. But you have to act fast, steer quickly,
and just as quickly straighten the wheel once you
have avoided the object.
The fact that such emergency situations are
always possible is a good reason to practice
defensive driving at all times and wear safety belts
properly.
300

Off-Road Recovery
You may nd that your vehicle’s right wheels have
dropped off the edge of a road onto the shoulder
while you are driving.
If the level of the shoulder is only slightly below the
pavement, recovery should be fairly easy. Ease off
the accelerator and then, if there is nothing in the
way, steer so that your vehicle straddles the edge
of the pavement. You can turn the steering wheel
up to one-quarter turn until the right front tire
contacts the pavement edge. Then turn the steering
wheel to go straight down the roadway.
Passing
The driver of a vehicle about to pass another on a
two-lane highway waits for just the right moment,
accelerates, moves around the vehicle ahead, then
goes back into the right lane again. A simple
maneuver?
Not necessarily! Passing another vehicle on a
two-lane highway is a potentially dangerous move,
since the passing vehicle occupies the same
lane as oncoming traffic for several seconds.
A miscalculation, an error in judgment, or a brief
surrender to frustration or anger can suddenly
put the passing driver face to face with the worst
of all traffic accidents — the head-on collision.
301

Check your vehicle’s mirrors, glance over your
shoulder, and start your left lane change
signal before moving out of the right lane to
pass. When you are far enough ahead of
the passed vehicle to see its front in
your vehicle’s inside mirror, activate the right
lane change signal and move back into
the right lane. Remember that your vehicle’s
passenger side outside mirror is convex.
The vehicle you just passed may seem to be
farther away from you than it really is.
Try not to pass more than one vehicle at a
time on two-lane roads. Reconsider before
passing the next vehicle.
Do not overtake a slowly moving vehicle too
rapidly. Even though the brake lamps are
not ashing, it may be slowing down or starting
to turn.
If you are being passed, make it easy for the
following driver to get ahead of you. Perhaps
you can ease a little to the right.
Loss of Control
Let us review what driving experts say about what
happens when the three control systems — brakes,
steering, and acceleration — do not have enough
friction where the tires meet the road to do what the
driver has asked.
In any emergency, do not give up. Keep trying to
steer and constantly seek an escape route or
area of less danger.
Skidding
In a skid, a driver can lose control of the vehicle.
Defensive drivers avoid most skids by taking
reasonable care suited to existing conditions, and
by not overdriving those conditions. But skids
are always possible.
The three types of skids correspond to your
vehicle’s three control systems. In the braking skid,
your wheels are not rolling. In the steering or
cornering skid, too much speed or steering in a
curve causes tires to slip and lose cornering force.
And in the acceleration skid, too much throttle
causes the driving wheels to spin.
303

Tires:They are vitally important to a safe,
trouble-free trip. Is the tread good enough
for long-distance driving? Are the tires
all inated to the recommended pressure?
Weather Forecasts:What is the weather
outlook along your route? Should you
delay your trip a short time to avoid a major
storm system?
Maps:Do you have up-to-date maps?
Highway Hypnosis
Is there actually such a condition as highway
hypnosis? Or is it just plain falling asleep at the
wheel? Call it highway hypnosis, lack of
awareness, or whatever.
There is something about an easy stretch of road
with the same scenery, along with the hum of
the tires on the road, the drone of the engine,
and the rush of the wind against the vehicle that
can make you sleepy. Do not let it happen to you!If it does, your vehicle can leave the road in less
than a second, and you could crash and be
injured.
What can you do about highway hypnosis?
First, be aware that it can happen.
Then here are some tips:
Make sure your vehicle is well ventilated,
with a comfortably cool interior.
Keep your eyes moving. Scan the road ahead
and to the sides. Check your rearview mirrors
and your instruments frequently.
If you get sleepy, pull off the road into a rest,
service, or parking area and take a nap, get
some exercise, or both. For safety, treat
drowsiness on the highway as an emergency.
313

You will need a well-charged battery to restart the
vehicle, and possibly for signaling later on with
your headlamps. Let the heater run for a while.
Then, shut the engine off and close the window
almost all the way to preserve the heat. Start
the engine again and repeat this only when you
feel really uncomfortable from the cold. But do it as
little as possible. Preserve the fuel as long as
you can. To help keep warm, you can get out of
the vehicle and do some fairly vigorous exercises
every half hour or so until help comes.
If Your Vehicle is Stuck in Sand,
Mud, Ice, or Snow
In order to free your vehicle when it is stuck, you
need to spin the wheels, but you do not want
to spin the wheels too fast. The method known as
rocking can help you get out when you are
stuck, but you must use caution.
{CAUTION:
If you let your vehicle’s tires spin at high
speed, they can explode, and you or
others could be injured. And, the
transmission or other parts of the vehicle
can overheat. That could cause an engine
compartment re or other damage. When
you are stuck, spin the wheels as little as
possible. Do not spin the wheels above
35 mph (55 km/h) as shown on the
speedometer.
Notice:Spinning the wheels can destroy parts
of your vehicle as well as the tires. If you
spin the wheels too fast while shifting
the transmission back and forth, you can
destroy the transmission.
For information about using tire chains on your
vehicle, seeTire Chains on page 418.
320