2011 VOLVO V60 brake

04 Comfort and driving pleasure
Adaptive cruise control*
04
176* Option/accessory, for more information, see Introduction.
or
•Press the accelerator pedal and accelerate
up to at least about 4 km/h (normal walking
pace).
The cruise control will then resume following
the vehicle in front.
NOTE
The cruise control can hold the car station-
ary for a maximum of 2 minutes - then the
parking brake is applied and the cruise con-
trol is disengaged.
•The driver has to release the parking
brake before the cruise control can be
reactivated.
Change of target
If the target vehicle in front suddenly turns then
there may be stationary traffic in front.
When the cruise control is following another
vehicle at speeds below 30 km/h and changes
target from a moving to a stationary vehicle, the
cruise control will slow down for the stationary
vehicle.
WARNING
When the cruise control is following another
vehicle at speeds in excess of 30 km/h and
the target is changed from a moving vehicle
to a stationary vehicle, the cruise control will
ignore the stationary vehicle and instead
select the stored speed.
•The driver must intervene him/herself
and brake.
Automatic standby mode with change of
target
Cruise control is disengaged and set in
standby mode:
•when the speed is below 15 km/h and
cruise control is not sure whether the target
object is a stationary vehicle or some other
object, e.g. a speed bump.
•when the speed is below 15 km/h and the
vehicle in front turns off so the cruise con-
trol no longer has a vehicle to follow.
Automatic braking ceases when
stationary
In certain situations the cruise control inter-
rupts braking when stationary. This means that
the foot brake is released and the driver must
brake himself/herself.
Cruise control releases the foot brake and is
set in standby mode when:
•the driver puts his/her foot on the brake
pedal
•the parking brake is applied
•the gear selector is moved to P, N or R
position
•the driver sets the cruise control in standby
mode.
Automatic activation parking brakeIn some situations the cruise control applies
the parking brake in order to keep a stationary
car remaining stationary.
This takes place if:
•the driver opens the door or takes off his/
her seatbelt
•DSTC is changed from Normal to Sport
mode
•cruise control has held the car stationary
for more than 2 minutes
•the engine is switched off
•the brakes have overheated.
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04 Comfort and driving pleasure
Adaptive cruise control*
04

* Option/accessory, for more information, see Introduction.177 The radar sensor and its limitations
Apart from the adaptive cruise control, the
radar sensor is also used by the Collision
Warning with Auto Brake function (see
page 188) and the Distance Alert function (see
page 181). The function of the radar sensor is
to detect cars or larger vehicles in the same
direction, in the same lane.
Modification of the radar sensor could result in
it being illegal to use.
WARNING
The driver must always be observant with
regard to the traffic conditions and intervene
when the adaptive cruise control is not
maintaining a suitable speed or suitable dis-
tance.
The adaptive cruise control cannot handle
all traffic, weather and road conditions.
The Function section and onwards informs
about limitations of which the driver should
be aware before using the adaptive cruise
control.
The driver always bears responsibility for
maintaining the correct distance and speed,
even when the adaptive cruise control is
being used.
WARNING
Accessories or other objects such as auxil-
iary lamps must not be installed in front of
the grille.
WARNING
Adaptive cruise control is not a collision
avoidance system. The driver must inter-
vene if the system does not detect a vehicle
in front.
The adaptive cruise control does not brake
for humans or animals, and not for small
vehicles such as bicycles and motorcycles.
Nor for oncoming, slow or stationary vehi-
cles and objects.
Do not use the adaptive cruise control, for
example, in city traffic, in dense traffic, at
junctions, on slippery surfaces, with a lot of
water or slush on the road, in heavy rain/
snow, in poor visibility, on winding roads or
on slip roads.
The capacity of the radar sensor to detect vehi-
cles in front is reduced significantly:
•if the radar sensor becomes blocked and
cannot detect other vehicles e.g. in heavy
rain or slush, or if other objects have col-
lected in front of the radar sensor.
NOTE
Keep the surface in front of the radar sensor
clean.
•if the speed of vehicles in front is signifi-
cantly different from your own speed.
Examples where the cruise control does
not work optimally
The radar sensor has a limited field of vision. In
some situations another vehicle is not
detected, or the detection is made later than
expected.
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04 Comfort and driving pleasure
Adaptive cruise control*
04
178* Option/accessory, for more information, see Introduction.
The ACC cannot see small vehicles (Dark triangle:
ACC field of vision).
Sometimes the radar sensor is late at
detecting vehicles at close distances, e.g.
a vehicle that drives in between the car and
vehicles in front.
Small vehicles, such as motorcycles, or
vehicles not driving in the centre of the lane
can remain undetected.
In bends the radar sensor may detect the
wrong vehicle or lose a detected vehicle
from view.
Fault tracing and action
If the display shows the message Radar
blocked See manual this means that the
radar signals from the radar sensor are blocked
and that vehicles in front of the car could not
be detected.
In turn this means that the Adaptive Cruise
Control, Distance Alert and Collision Warning
with Auto Brake functions are not operating
either.The following table presents possible causes
for a message being shown along with the
appropriate action.
CauseAction
The radar surface in the grille is dirty or covered with ice or snow.Clean the radar surface in the grille from dirt, ice and snow.
Heavy rain or snow blocking the radar signals.No action. Sometimes the radar does not work during heavy rain or
snowfall.
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04 Comfort and driving pleasure
Adaptive cruise control*
04

* Option/accessory, for more information, see Introduction.179
CauseAction
Water or snow from the road surface swirls up and blocks the radar sig-
nals.No action. Sometimes the radar does not work on a very wet or snowy
road surface.
The radar surface has been cleaned but the message remains.Wait. It could take several minutes for the radar to sense that it is no
longer blocked.
Symbols and messages in the display
SymbolMessageSpecification
Standby mode or active mode without detected vehicle.
Active mode with detected vehicle to which cruise control adapts the speed.
Time interval activated, during adjustment.
Time interval activated, after adjustment.
Turn on DSTC to enable
CruiseCruise control cannot be activated until the stability and traction control function (DSTC) has been set
in Normal mode.
Cruise control CancelledThe cruise control has been deactivated - the driver has to regulate the speed.
Cruise control UnavailableCruise control cannot be activated.
This could be due to:
•brake temperature is high
•the radar sensor is blocked by e.g. wet snow or rain.
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04 Comfort and driving pleasure
Adaptive cruise control*
04
180* Option/accessory, for more information, see Introduction.
SymbolMessageSpecification
Radar blocked See manualCruise control temporarily disengaged.
•The radar sensor is blocked and cannot detect other vehicles. For example, in the event that heavy
rain or if slush has collected in front of the radar sensor.
Read about the limitations of the radar sensor, see page 177.
Cruise control Service
requiredCruise control not working.
•Contact a workshop - an authorised Volvo workshop is recommended.
Press Brake To hold +
acoustic alarm(Only cars with automatic gearbox - "Queue Assist")
The car is stationary and the cruise control will release the foot brake to allow the parking brake to
take over and hold the car, but a fault in the parking brake means the car will shortly begin to roll.
•The driver must brake himself/herself. The message remains and the alarm sounds until the driver
depresses the brake pedal or uses the accelerator pedal.
–Below 30 km/h Only fol-
lowing(Only cars with automatic gearbox - "Queue Assist")
Shown with attempts to activate the cruise control at speeds below 30 km/h without a vehicle in front
within the activation distance (approx. 30 metres).
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04 Comfort and driving pleasure
Distance Alert*
04
* Option/accessory, for more information, see Introduction.183
SymbolMessageSpecification
Radar blocked.
See manualDistance Alert temporarily disengaged.
The radar sensor is blocked and cannot detect other vehicles, e.g. in the event that heavy rain or slush
has collected in front of the radar sensor.
Read about the limitations of the radar sensor, see page 177.
Collision warn. Service
requiredDistance Alert and Collision Warning with Auto Brake are fully or partially disengaged.
Visit a workshop if the message remains - an authorised Volvo workshop is recommended.
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04 Comfort and driving pleasure
City Safety™
04
184* Option/accessory, for more information, see Introduction.
General
City Safety™ is a function for helping the driver
to avoid a collision when driving in queues,
amongst other things, when changes in the
traffic ahead, combined with a lapse in atten-
tion, could lead to an incident.
The function is active at speeds of up to
30 km/h and it helps the driver by automatically
braking the car in the event of imminent risk of
collision with vehicles in front, should the driver
not react in time by braking and/or steering
away.
City Safety™ is activated in situations where
the driver should have started braking earlier,
which is why it cannot help the driver in every
situation.
City Safety™ is designed to be activated as
late as possible in order to avoid unnecessary
intervention.
City Safety™ must not be used as an excuse
for the driver to change his/her driving style. If
the driver solely relies on City Safety™ to do
the braking, there will be a collision sooner or
later.
The driver or passengers normally only notice
City Safety™ if a situation arises where the car
is extremely close to being in a collision.If the car is also equipped with a Collision
Warning function with Auto Brake*, these two
systems complement each other. For more
information on Collision Warning function with
Auto Brake, see page 188.
IMPORTANT
Maintenance and replacement of City
Safety™ components must only be per-
formed by a workshop - an authorised Volvo
workshop is recommended.
WARNING
City Safety™ does not engage in all driving
situations or traffic, weather or road condi-
tions.
City Safety™ does not react to vehicles
driving in a different direction from the car,
to small vehicles, motorcycles and bicycles
or to humans and animals.
City Safety™ can prevent collision at a
speed difference of less than 15 km/h - at a
higher speed difference, it is only possible
to reduce collision speed. In order to obtain
full brake function, the driver must depress
the brake pedal.
Never wait for City Safety™ to engage. The
driver always bears responsibility for main-
taining the proper distance and speed.
Function
Laser sensor transmitter and receiver window.
City Safety™ detects the traffic in front of the
car with a laser sensor fitted in the top edge of
the windscreen. If there is an imminent risk of
collision, City Safety™ will automatically brake
the car, which may be experienced as sudden
braking.
If the speed difference is 4-15 km/h in relation
to the vehicle in front then City Safety™ can
completely prevent a collision.
City Safety™ activates a short, sharp braking
and stops the car in normal circumstances, just
behind the vehicle in front. For most drivers this
is well outside normal driving style and may be
experienced as being uncomfortable.
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04 Comfort and driving pleasure
City Safety™
04

185
If the difference in speed between the vehicles
is 15-30 km/h, City Safety™ may not prevent
the collision on its own. To obtain full brake
force, the driver must depress the brake pedal.
This could make it possible to prevent a colli-
sion even at speed differences above
15 km/h.
When the function is activated and brakes, the
instrument panel display shows a message to
the effect that the function is/has been active.
NOTE
The brake lights come on when City
Safety™ brakes the car.
Operation
NOTE
The City Safety™ function is always ena-
bled after the engine has been started via
key position I and II (see page 81 on key
positions).
On and OffIn certain situations, it may advisable to disable
City Safety™, e.g. where leafy branches could
sweep over the bonnet and/or windscreen.
After starting the engine City Safety™ can be
deactivated as follows:Using MY CAR on the centre console display
screen with its menu system, search and locate
SETUP
Car settingsDriver support
system
City Safety. Select the option Off.
(For information on the menu system MY
CAR, see page 142.)
However, the function will be enabled the next
time the engine is started, regardless of
whether the system was enabled or disabled
when the engine was switched off.
WARNING
The laser sensor also transmits laser light
when City Safety™ is disabled manually.
To enable City Safety™ again:
•Follow the same procedure as for disa-
bling, but select the On option.
Limitations
The sensor in City Safety™ is designed to
detect cars and other large vehicles in front of
the car irrespective of whether it is day or night.
However, the sensor has limitations and has
poorer functionality in e.g. heavy snowfall or
rain, dense fog, dust storms or snow flurries.
Mist, dirt, ice or snow on the windscreen may
disrupt the function.Low-hanging objects, e.g. a flag/pennant for
projecting load, or accessories such as auxili-
ary lamps and bull bars that are higher than the
bonnet limit the function.
The infrared light from the sensor in City
Safety™ measures how the light is reflected.
The sensor cannot detect objects with low
reflection capacity. The rear sections of the
vehicle generally reflect the light sufficiently
thanks to the number plate and rear light reflec-
tors.
On slippery road surfaces the braking distance
is extended, which may reduce the capacity of
City Safety™ to avoid a collision. In such sit-
uations the ABS and DSTC systems will pro-
vide best possible braking force with main-
tained stability.
When the car is reversing City Safety™ cannot
be activated.
City Safety™ is not activated at low speeds -
under 4 km/h, which is why the system does
not intervene in situations where a vehicle in
front is being approached very slowly, e.g.
when parking.
Driver commands are always prioritised, which
is why City Safety™ does not intervene in sit-
uations where the driver is steering, braking or
accelerating in a clear manner, even if a colli-
sion is unavoidable.
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