2009 CADILLAC STS brake

Low-Speed Deactivation
If your speed falls below 25 mph (40 km/h) while
following a vehicle ahead, Adaptive Cruise Control will
begin to disengage. The driver alert symbol on the HUD
will ash and the warning beep will sound. The driver
must take action since Adaptive Cruise Control will
not slow the vehicle to a stop.
Deactivation When Head-Up Display is
Turned Off
If the HUD is turned off when Adaptive Cruise Control
is engaged, it will begin to disengage. A warning beep
sounds and the message RADAR CRUISE NOT READY
appears on the Driver Information Center (DIC). SeeDIC
Warnings and Messages on page 3-79for additional
information. If Adaptive Cruise Control was braking when
the HUD is turned off, the braking will continue briey.
Passing a Vehicle/Adaptive Cruise Control
Override
To increase speed to pass a vehicle, use the
accelerator pedal. While you are doing this, the
system will not automatically apply the brakes.
A PEDAL APPLIED ACC OVERRIDE message will
appear on the HUD. SeeHead-Up Display (HUD) on
page 3-43for additional information. Once you pass
the vehicle and remove your foot from the accelerator
pedal, Adaptive Cruise Control returns to normal
operation and the brakes can be applied, if needed.
{CAUTION:
If you rest your foot on the accelerator pedal, the
system will not automatically apply the brakes.
You could crash into a vehicle ahead of you.
Do not rest your foot on the accelerator pedal
when using Adaptive Cruise Control.
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Curves in the Road
{CAUTION:
Due to Adaptive Cruise Control limitations in
curves, it may respond to a vehicle in another
lane, or may not have time to react to a vehicle in
your lane. You could crash into a vehicle ahead of
you, or lose control of your vehicle. Give extra
attention in curves and be ready to use the brakes
if necessary. Select an appropriate speed while
driving in curves.
Adaptive Cruise Control might operate differently in a
sharp curve. It might reduce your speed if the curve is
too sharp.When following a vehicle and entering a curve, Adaptive
Cruise Control could lose track of the vehicle in your
lane and your vehicle could accelerate. When this
happens, the vehicle ahead symbol will not appear
on the HUD.
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Adaptive Cruise Control might detect a vehicle that is
not in your lane and apply the brakes.
Adaptive Cruise Control might occasionally provide a
driver alert and/or braking that you consider unnecessary.
It could respond to signs, guardrails, and other stationary
objects when entering or exiting a curve. This is normal
operation. Your vehicle does not need service.
Highway Exit Ramps
{CAUTION:
Adaptive Cruise Control may lose track of the
vehicle ahead and accelerate up to your set speed
while entering or on highway exit ramps. You could
be startled by this acceleration and even lose
control of the vehicle. Disengage Adaptive Cruise
Control before entering a highway exit ramp. Do not
use Adaptive Cruise Control while entering or on
exit ramps.
Other Vehicle Lane Changes
If another vehicle enters the same lane as you,
Adaptive Cruise Control will not detect the vehicle
until it is completely in the lane. Be ready to take
action and apply the brakes yourself.
3-30

Using Adaptive Cruise Controls on Hills
and When Towing a Trailer
How well Adaptive Cruise Control works on hills and
while a trailer is being towed depends on your vehicle
speed, vehicle load, traffic conditions, and the steepness
of the hills. It might not detect a vehicle in your lane while
driving on hills. While going up steep hills, you might want
to use the accelerator pedal to maintain your vehicle
speed. While going downhill and towing a trailer, you
might want to brake to keep your vehicle speed down.
Applying the brake disengages the system. You may
choose not to use Adaptive Cruise Control on steep
hills when towing a trailer.
Disengaging Adaptive Cruise Control
Apply the brake pedal or move the Adaptive Cruise
Control switch to off, to disengage the system. Adaptive
Cruise Control information does not appear on the
HUD while the system is not engaged.
Erasing Set Speed Memory
The set speed memory is erased when the Adaptive
Cruise Control switch or the ignition is turned off.
Other Messages
There are three messages that may appear on the DIC.
They are SERVICE RADAR CRUISE, RADAR CRUISE
NOT READY and CLEAN RADAR. These messages will
appear to indicate a problem with the Adaptive Cruise
Control. SeeDIC Warnings and Messages on page 3-79
for more information.
Cleaning the System
The radar can become blocked by snow, ice, or dirt.
If this happens, turn off the engine and clean the emblem/
lens, located in the center of the front outside grille.
Do not use Adaptive Cruise Control in icy conditions,
or when visibility is low, such as in fog, rain or snow.
To clean the emblem/lens, wipe the surface with a soft
cloth. After cleaning the emblem/lens, engage the
Adaptive Cruise Control. If you are unable to do so,
see your dealer/retailer.
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With Twilight Sentinel the following will happen:
When it is dark enough outside, the front turn signal
lamps (DRL) will go off, and the headlamps and
parking lamps will come on. The other lamps
that come on with headlamps will also come on.
When it is bright enough outside, the headlamps
will go off, and the front turn signal lamps (DRL)
will come on, as long as the exterior lamp switch
is in the off position.
If the vehicle is started in a dark garage, the automatic
headlamp system comes on immediately. Once the
vehicle leaves the garage, it will take about one minute
for the automatic headlamp system to change to DRL
if it is light outside. During that delay, the instrument
panel cluster might not be as bright as usual. Make sure
the instrument panel brightness control is in full bright
position. SeeInstrument Panel Brightness on page 3-40
for more information.
You can idle the vehicle with the lamps off, even when
it is dark outside. First set the parking brake while the
ignition is in OFF/ACCESSORY. Then start the vehicle.
The lamps will stay off until the parking brake is released.Twilight Sentinel also provides exterior illumination as
you leave the vehicle. If Twilight Sentinel has turned on
the lamps when you turn off the ignition, the lamps
will remain on until:
The exterior lamp switch is moved from off to the
parking lamp position.
A delay time that you select has elapsed.
SeeVehicle Personalization on page 2-61to select the
delay time needed. You can also select no delay time.
If the ignition is turned off with the exterior lamp switch
in the parking lamp or headlamp position, the Twilight
Sentinel delay will not occur. The lamps will turn off
as soon as the switch is turned off.
As with any vehicle, the regular headlamp system
should be turned on when needed.
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PEDAL APPLIED ACC OVERRIDE
When the PEDAL APPLIED ACC OVERRIDE message
displays, the accelerator pedal is being pressed and
the Adaptive Cruise Control is overridden and cannot
automatically apply the brakes. Once the accelerator
pedal is released, the Adaptive Cruise Control will return
to normal operation and be able to apply the brakes,
if needed.
An Adaptive Cruise Control active symbol, alert symbol
or vehicle ahead symbol may also appear. SeeAdaptive
Cruise Control on page 3-20for more information.
Care of the HUD
Clean the inside of the windshield as needed to remove
any dirt or lm that reduces the sharpness or clarity
of the HUD display.
To clean the HUD, spray household glass cleaner on a
soft, clean cloth. Wipe the HUD lens gently, then dry.
Notice:When cleaning, be careful not to scratch
the HUD or camera lenses. Do not spray glass
cleaner directly on the HUD lens because the cleaner
could leak inside the unit and cause damage.
Accessory Power Outlet(s)
Accessory power outlets can be used to plug in electrical
equipment, such as a cellular telephone.
The vehicle has one outlet in front of the center console,
one in the center console lid and there may be an
additional outlet in the rear of the center console.
The vehicle may have a small cap that must be
removed to access the accessory power outlet.
Be sure to cover the outlet with the protective cap
when it is not in use.
Notice:Leaving electrical equipment plugged in for
an extended period of time while the vehicle is off
will drain the battery. Power is always supplied
to the outlets. Always unplug electrical equipment
when not in use and do not plug in equipment
that exceeds the maximum 20 ampere rating.
Certain accessory power plugs may not be compatible
to the accessory power outlet and could result in
blown vehicle or adapter fuses. If you experience a
problem, see your dealer for additional information
on the accessory power outlets.
Notice:Adding any electrical equipment to the
vehicle can damage it or keep other components
from working as they should. The repairs would
not be covered by the vehicle warranty. Do not
3-46

Brake System Warning Light
The 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.
If the warning light comes on, there is a brake problem.
Have the brake system inspected right away.
This light comes on briey when the engine is turned
on. 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
also comes on when the parking brake is set. The light
will stay on if the parking brake does not release fully. If it
stays on after the parking brake is fully released, it means
there is a brake problem.
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. It may take longer
to stop. If the light is still on, have the vehicle towed
for service. SeeTowing Your Vehicle on page 4-29.
{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
3-62

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 3-62.
For vehicles with a Driver Information Center (DIC),
seeDIC Warnings and Messages on page 3-79for
all brake related DIC messages.
Traction Control System (TCS)
Warning Light
The TCS warning light
comes on briey when
the engine is started.
If it does not, have the vehicle serviced by your
dealer/retailer.
If the Traction Control System (TCS) warning light
comes on and stays on, there may be a problem with
the TCS.
The light also comes on if the TCS is turned off using
the traction control on/off button located on the console.
If this light stays on or comes on while driving, pull
off the road as soon as possible and stop carefully.
Turn the engine off and then restart it. If the light still
stays on or comes back on again while driving, the
vehicle needs service. Have the TCS inspected as
soon as possible. SeeTraction Control System (TCS)
on page 4-10andStabiliTrak
®System on page 4-6
for more information.
Also seeCompetitive Driving Mode on page 4-11for
more information.
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