2009 CADILLAC DTS brake

Cruise Control
With cruise control, a speed of approximately 25 mph
(40 km/h) or more can be maintained without keeping
your foot on the accelerator. Cruise control does not work
at speeds below about 25 mph (40 km/h). A cruise control
light appears in the instrument panel cluster when the
cruise control is on.
When the brakes are applied, the cruise control
shuts off.{CAUTION:
Cruise control can be dangerous where you
cannot drive safely at a steady speed. So, do
not use the cruise control on winding roads or
in heavy traffic.
Cruise control can be dangerous on slippery roads.
On such roads, fast changes in tire traction can
cause excessive wheel slip, and you could lose
control. Do not use cruise control on slippery roads.
If your vehicle is in cruise control when the Traction
Control System (TCS) begins to limit wheel spin, the
cruise control automatically turns off. SeeTraction
Control System (TCS) on page 4-6. When road
conditions let you safely use it again, the cruise
control can be turned back on.
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Setting Cruise Control
{CAUTION:
If you leave your cruise control on when you
are not using cruise, you might hit a button and go
into cruise when you do not want to. You could be
startled and even lose control. Keep the cruise
control switch off until you want to use cruise
control.
The cruise control buttons
are located on left side of
the steering wheel.
I(On):Turns on the cruise control system.
+ RES (Resume/Accelerate):Press to make the
vehicle accelerate or resume to a previously set speed.
SET– (Set):Press to set the speed.
[(Cancel):Press to cancel cruise control.
Cruise control will not work if the parking brake is set, or
if the master cylinder brake uid level is low.
If the brakes are applied, the cruise control shuts off.
The cruise light on the instrument panel cluster comes
on after the cruise control has been set to the desired
speed.
1. Press
I.
2. Get up to the desired speed.
3. Press the SET– button located on the steering
wheel and release it.
4. Take your foot off the accelerator.
3-17

Resuming a Set Speed
Suppose the cruise control is set at a desired speed
and then the brakes are applied. This shuts off the
cruise control. But it does not need to be reset.
Once the vehicle is traveling approximately 25 mph
(40 km/h) or more, press the +RES (resume/accelerate)
button to return to the desired preset speed. The cruise
light displays again.
The vehicle returns to and stays at the preset speed.
If you press and hold the +RES button, the vehicle
speed increases until the button is released or the brake
is applied. Do not hold in the +RES button, if you do
not want the vehicle speed to increase.
Increasing Speed While Using Cruise
Control
There are two ways to go to a higher speed:
Use the accelerator pedal to get to the higher
speed. Press the SET– button, then release
the button and the accelerator pedal. The vehicle
now cruises at the higher speed.
Press the +RES button. Hold it there until the
desired speed is reached, and then release
the button. To increase the vehicle speed in very
small amounts, briey press the +RES button
and then release it. Each time this is done, the
vehicle accelerates approximately 1 mph (1.6 km/h).
The accelerate feature only works after the cruise
control speed is set by pressing the SET– button.
Reducing Speed While Using Cruise
Control
There are two ways to reduce the vehicle speed while
using cruise control:
Press the SET– button until the lower speed
desired is reached, then release it.
To slow down in very small amounts, push the
SET– button briey. Each time this is done, the
vehicle slows down approximately 1 mph (1.6 km/h).
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Passing Another Vehicle While Using
Cruise Control
Use the accelerator pedal to increase the vehicle speed.
When you take your foot off the pedal, the vehicle
slows down to the previous cruise control speed.
Using Cruise Control on Hills
How well your cruise control works on hills depends
upon the vehicle speed, load, and the steepness of the
hills. When going up steep hills, you might have to step
on the accelerator pedal to maintain the vehicle’s speed.
When going downhill, you might have to brake or shift to
a lower gear to keep the vehicle’s speed down. Applying
the brake or shifting into a lower gear ends cruise control.
If you need to apply the brake or shift to a lower gear due
to the grade of the downhill slope, you might not want to
attempt to use the cruise control feature.
Ending Cruise Control
To turn off the cruise control, step lightly on the brake
pedal, or press the cancel button on the steering wheel.
Erasing Speed Memory
The cruise control set speed memory is erased when
the cruise control or the ignition is turned off.
Adaptive Cruise Control
For vehicles with this feature, be sure to read this entire
section before using it.
The system operates on a radio frequency subject to
Federal Communications Commission (FCC) Rules and
with Industry Canada.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
1. This device may not cause interference.
2. This device must accept any interference received,
including interference that may cause undesired
operation of the device.
This device complies with RSS-210 of Industry Canada.
Operation is subject to the following two conditions:
1. This device may not cause interference.
2. This device must accept any interference received,
including interference that may cause undesired
operation of the device.
Changes or modications to this system by other than
an authorized service facility could void authorization to
use this equipment.
Adaptive Cruise Control (ACC) is an enhancement
to traditional cruise control. It allows you to keep
cruise control engaged in moderate traffic conditions
without having to constantly reset your cruise control.
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ACC uses radar to detect a vehicle directly ahead
in your path, within a distance of 330 ft (100 m), and
operates at speeds above 25 mph (40 km/h). When it
is engaged by the driver, the system can apply limited
braking or acceleration of the vehicle automatically
to maintain a selected follow distance to the vehicle
ahead. Braking is limited to 0.25 g’s (2.45 m/sec2)
of deceleration, which is comparable to moderate
application of the vehicle’s brakes. To disengage ACC,
apply the brake. If no vehicle is in your path, the vehicle
will react like traditional cruise control.
{CAUTION:
Adaptive Cruise Control will not apply hard braking
or bring the vehicle to a complete stop. It will not
respond to stopped vehicles, pedestrians or
animals. When you are approaching a vehicle or
object, Adaptive Cruise Control may not have time
to slow your vehicle enough to avoid a collision.
Your complete attention is always required while
driving and you should be ready to take action
and apply the brakes. For more information,
seeDefensive Driving on page 4-2.
{CAUTION:
On winding roads, Adaptive Cruise Control
may not detect a vehicle ahead. You could
crash into a vehicle ahead of you. Do not use
Adaptive Cruise Control on winding roads.
Adaptive Cruise Control may not have time
to slow your vehicle enough to avoid a crash
when you are driving in conditions where
vehicles may suddenly slow or stop ahead of
you, enter your lane, or cross your vehicle’s
path. If you are driving in these conditions, do
not use Adaptive Cruise Control. The warning
beep and alert symbol may indicate that you
are driving in conditions where Adaptive Cruise
Control should not be used. See “Alerting the
Driver” in this section.
On slippery roads, fast changes in tire traction
can cause needless wheel spinning, and you
could lose control. Do not use cruise control on
slippery roads.
CAUTION: (Continued)
3-20

CAUTION: (Continued)

When weather limits visibility, such as when in
fog, rain, or snow conditions, Adaptive Cruise
Control performance is limited. There may not
be enough distance to adapt to the changing
traffic conditions. Do not use cruise control
when visibility is low.
The ACCs are located on the steering wheel.The cruise control buttons are located on left side of the
steering wheel.](On):Press to turn the system on.
+ Res (Resume/Accelerate):Press to make the
vehicle resume to a previously set speed or to increase
the set speed when ACC is already active.
Set– :Press to set the speed or to decrease the set
speed when ACC is already active.
[(Cancel):Press to cancel ACC.
+GAP (Increase Following Distance):Press to
increase the distance between your vehicle and other
vehicles.
−GAP (Decrease Following Distance):Press to
decrease the distance between your vehicle and other
vehicles.
ACC will not work if the master cylinder brake uid level
is low.
3-21

Engaging ACC With the Set Button
{CAUTION:
If you leave your Adaptive Cruise Control switch
on when you are not using cruise, you might hit a
button and go into cruise when you do not want
to. You could be startled and even lose control.
Keep the Adaptive Cruise Control switch off until
you want to use cruise control.
The set speed is selected by the driver. This is the
speed your vehicle will travel if there is no vehicle
detected in its path.
To set ACC, do the following:
1. Press the
]button.
2. Get up to the speed desired.
3. Press in the SET– button and release it.
4. Take your foot off the accelerator pedal.
Once ACC is set, it may immediately apply the brakes if
it detects a vehicle ahead is too close or moving slower
than your vehicle.The on symbol is located on the display at the top of the
instrument panel to the right of the driver. When the on
symbol is lit on the display, it indicates that ACC is active.
A message on the DIC will also display when ACC is
set. SeeDIC Warnings and Messages on page 3-73.
Keep in mind speed limits, surrounding traffic speeds,
and weather conditions when adjusting your set speed.
If the vehicle is in ACC when the traction control system
begins to limit wheel spin, the ACC will automatically
disengage. SeeTraction Control System (TCS) on
page 4-6andStabiliTrak
®System on page 4-6. When
road conditions allow you to safely use it again, the ACC
can be turned back on.
Increasing Set Speed While Using ACC
There are two ways to increase the set speed:
Use the accelerator to get to the higher speed.
Press the SET– button and then release the
button and the accelerator pedal. The vehicle
will now cruise at the higher speed.
Press the +RES button. Hold it there until the
desired set speed is displayed on the Driver
Information Center (DIC), then release the switch.
To increase the set speed in very small amounts,
move the switch briey to +RES. Each time this is
done, the set speed increases by 1 mph (1 km/h).
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Your vehicle will not reach the set speed until the
system determines there is not a vehicle in front of you.
At that point, your vehicle speed will increase to the
set speed.
Decreasing Set Speed While Using ACC
Press the SET– button until you reach the lower speed
desired, then release it.
To slow down in very small amounts, briey press the
SET– button. Each time this is done, the set speed
decreases by 1 mph (1 km/h) slower.
Resuming a Set Speed
Suppose the ACC is set at a desired speed and then
the brakes are applied. This will turn off the ACC.
But it does not need to be reset.
Once the vehicle speed reaches about 25 mph (40 km/h)
or more, press the +RES button. ACC will be engaged
with the previously chosen set speed.
Selecting the Follow Distance (GAP)
When the system detects a slower moving vehicle, it will
adjust your vehicle’s speed and maintain the follow
distance (gap) you select.
Use the plus and minus buttons on the steering wheel
to adjust the follow distance.
Press the plus button to increase the distance or the
minus button to decrease the distance. The rst button
press shows the current follow distance setting on
the DIC. The current follow distance setting will be
maintained until it is changed.
There are six follow distances to choose from.
The follow distance selection ranges from near to far
(one second to two seconds follow time). The distance
maintained for a selected follow distance will vary based
on vehicle speed. The faster the vehicle speed the further
back your vehicle will follow. Consider traffic and weather
conditions when selecting the follow distance. The range
of selectable distances may not be appropriate for all
drivers and driving conditions. If you prefer to travel at
a follow distance farther than ACC allows, disengage
the system and drive manually.
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