2013 VOLVO V60 brake sensor

04 Driver support
City Safety™
04
168* 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
under50 km/h and it helps the driver by auto-
matically braking the car in the event of immi-
nent 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 173.
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 window1.
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.
1NOTE: The illustration is schematic - details may vary depending on car model.
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04 Driver support
City Safety™
04
169
If the difference in speed between the vehicles
is greater than 15 km/h then City Safety™ may
not prevent the collision on its own. To obtain
full brake force, the driver must depress the
brake pedal. This could then make it possible
to prevent a collision, even at speed differen-
ces 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 78 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 dis-
play screen with its menu system, search
and locate Settings
Car settings
Driver support systemsCity Safety.
Select the
Off option. For more information
on the menu system MY CAR, see
page 202.
However, the function will be enabled the
next time the engine is started, regardless
of whether the system was enabled or dis-
abled 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 - or none at all - 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 laser 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 your own car is reversing, City Safety™
is temporarily deactivated.
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 or acceler-
ating in a clear manner, even if a collision is
unavoidable.
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04 Driver support
City Safety™
04
170
When City Safety™ has prevented a collision
with a stationary object the car remains sta-
tionary for a maximum of 1.5 seconds. If the car
is braked for a vehicle in front that is moving,
then speed is reduced to the same speed as
that maintained by the vehicle in front.
On a car with manual gearbox the engine stops
when City Safety™ has stopped the car, unless
the driver manages to depress the clutch pedal
beforehand.
NOTE
•Keep the windscreen surface in front of
the laser sensor free from ice, snow and
dirt (see the illustration for sensor loca-
tion, page 168).
•Do not affix or mount anything on the
windscreen in front of the laser sensor
•Remove ice and snow from the bonnet
- snow and ice must not exceed a height
of 5 cm.
Fault tracing and action
If the message Windscreen Sensors
blocked is shown on the instrument panel dis-
play, it indicates that the laser sensor is
blocked and cannot detect vehicles in front of
the car. This means that City Safety™ is not
operational.The
Windscreen Sensors blocked message
is not shown for all situations in which the laser
sensor is blocked. The driver must therefore be
diligent about keeping the windscreen and
area in front of the laser sensor clean.
The following table presents possible causes
for the message being shown, along with sug-
gestions for appropriate action.
CauseAction
The windscreen sur-
face in front of the
laser sensor is dirty
or covered with ice
or snow.Clean the wind-
screen surface in
front of the sensor
from dirt, ice and
snow.
The laser sensor
field of vision is
blocked.Remove the block-
ing object.
IMPORTANT
If there are cracks, scratches or stone chips
in the windscreen in front of either of the
laser sensor's "windows" and they cover a
surface of approx. 0.5 x 3.0 mm (or larger),
then a workshop must be contacted for
repair or replacement of the windscreen
(see the illustration for sensor location, page
168) - an authorised Volvo workshop is rec-
ommended.
Failure to take action may result in reduced
performance for City Safety™.
To avoid the risk of reducing City Safety™
performance the following also applies:
•Before replacing a windscreen, contact
an authorised Volvo workshop to verify
that the correct windscreen is ordered
and fitted. Using the wrong windscreen
may result in the City Safety function
failing to operate or operating incor-
rectly.
•The same type or Volvo-approved
windscreen wipers must be fitted during
replacement.
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04 Driver support
City Safety™
04
172
SymbolMessageMeaning/Action
Auto braking by City SafetyCity Safety™ is braking or has automatically braked.
Windscreen Sensors
blockedThe laser sensor is temporarily non-operational because something is blocking it.
•Remove the object blocking the sensor and/or clean the windscreen in front of the sensor.
Read about the limitations of the laser sensor, see page 169.
City Safety Service
requiredCity Safety™ is not operational.
•Visit a workshop if the message remains - an authorised Volvo workshop is recommended.
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04 Driver support
Collision Warning with Auto Brake & Pedestrian Protection*
04
* Option/accessory, for more information, see Introduction.173 General
"Collision Warning with Auto Brake & Pedes-
trian Detection" is an aid to assist the driver
when there is a risk of colliding with a pedes-
trian or vehicle in front that is stationary or
moving in the same direction.
Collision Warning with Auto Brake & Pedestrian
Detection is activated in situations where the
driver should have started braking earlier,
which is why it cannot help the driver in every
situation.
Collision Warning with Auto Brake & Pedestrian
Detection is designed to be activated as late as
possible in order to avoid unnecessary inter-
vention.
Collision Warning with Auto Brake & Pedestrian
Detection may prevent a collision or reduce the
collision speed.
Collision Warning with Auto Brake & Pedestrian
Detection must not be used as an excuse for
the driver to change his/her driving style. If the
driver solely relies on Collision Warning with
Auto Brake to do the braking, there will be a
collision sooner or later.
Two system levelsDepending on how the car equipped, the Col-
lision Warning with Auto Brake & Pedestrian
Detection function may appear in two variants:
Level 1 and Level 2.
Level 1The driver is merely warned of occurring obsta-
cles by means of visual and acoustic signals -
no automatic braking intervenes, the driver
must himself brake.
Level 2The driver is warned of occurring obstacles by
means of visual and acoustic signals - the car
is braked automatically if the driver himself
does not act within a reasonable time.
IMPORTANT
Maintenance of components included in
Collision Warning with Auto Brake & Pedes-
trian Detection must only be carried out in a
workshop - an authorised Volvo workshop
is recommended.
Function
Function overview1.
Audio-visual warning signal in the event of
a collision risk.
Radar sensor2
Camera sensor
Collision Warning with Auto Brake executes
three steps in the following order:
1.
Collision warning
2.
Brake support
2
3.
Auto Brake2
1NOTE: The illustration is schematic - details may vary depending on car model.2With system Level 2 only.
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04 Driver support
Collision Warning with Auto Brake & Pedestrian Protection*
04
* Option/accessory, for more information, see Introduction.175 Detection of pedestrians
Optimal examples of what the system regards as
pedestrians with clear body contours.
Optimal performance of the system requires
that the system function that detects pedes-
trians receives as unambiguous information as
possible about the contours of the body - this
implies the opportunity to identify the head,
arms, shoulders, legs, upper and lower body
combined with a normal human pattern of
movement.
If large parts of the body are not visible to the
camera then the system cannot detect a
pedestrian.
•In order for a pedestrian to be detected he/
she must appear full-length and have a
height of at least 80 cm.
•The system cannot detect a pedestrian
carrying larger items.
•The camera sensor's ability to see pedes-
trians at dusk and dawn is limited - just like
the human eye.
•The camera sensor's capacity to detect
pedestrians is deactivated when driving in
darkness and tunnels - even when street-
lights are lit.
WARNING
Collision Warning with Auto Brake & Pedes-
trian Detection is an assistance tool.
This function cannot detect all pedestrians
in all situations and it cannot see e.g. parti-
ally obscured pedestrians, people in cloth-
ing that hides the contours of the body or
pedestrians shorter than 80 cm.
•The driver is always responsible that the
vehicle is driven properly and with a
safety distance adapted to the speed.
Operation
Settings are made from MY CAR via the centre
console display screen and menu system. For
information on how the menu system is used,
see page 202.
NOTE
The Brake Support and Auto Brake func-
tions are always enabled - they cannot be
deactivated.
On and OffTo select whether the collision warning system
should be switched on or off:
•Use the menu system MY CAR via the
centre console display to search for
Settings
Car settingsDriver
support systems
Collision Warning -
there, select
On or Off.
An activated function is tested every time the
engine is started by briefly illuminating the sep-
arate lights for the warning lamp (no. [1] in the
illustration on page 173).
When starting the engine, the setting that was
selected when the engine was switched off is
obtained automatically.
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04 Driver support
Collision Warning with Auto Brake & Pedestrian Protection*
04
176* Option/accessory, for more information, see Introduction.
Activating/deactivating warning signalsThe warning lamp (no. [1] in the illustration on
page 173) is activated automatically when the
engine is started if Collision Warning is ena-
bled.
The warning sound can be activated/deacti-
vated separately:
•Select On or Off in the menu system MY
CAR under Settings
Car settings
Driver support systemsCollision
Warning
Warning sound.
Set warning distanceThe warning distance regulates the distance at
which the visual and acoustic warnings are
deployed.
•Select one of the options from Long,Normal or Short in the menu system MY
CAR under Settings
Car settings
Driver support systemsCollision
Warning
Warning distance.
The warning distance determines the system's
sensitivity. Warning distance
Long provides an
earlier warning. First test with Long and if this
setting produces too many warnings, which
could be perceived as irritating in certain sit-uations, then change to warning distance
Normal.
Only use warning distance
Short in excep-
tional cases, e.g. for dynamic driving.
NOTE
When the adaptive cruise control is in use
the warning lamp and warning sound will be
used by the cruise control even if the colli-
sion warning system is switched off.
The collision warning system warns the
driver in the event of a risk of a collision, but
the function cannot shorten driver reaction
time.
In order for the collision warning system to
be effective, always drive with the Distance
Alert set at time interval 4 – 5. see
page 165.
NOTE
Even if the warning distance has been set toLong warnings could be perceived as being
late in certain situations, e.g. when there are
large differences in speed or if vehicles in
front brake heavily.
WARNING
No automatic system can guarantee
100 % correct function in all situations.
Therefore, never test the Auto Brake system
by driving at people or vehicles - this may
cause severe damage and injury and risk
lives.
Checking settingsThe settings required can be controlled on the
centre console display screen. Search with the
menu system MY CAR under Settings
Car
settings
Driver support systems
Collision Warning, see page 202.
Maintenance
Camera and radar sensor3.
3NOTE: The illustration is schematic - details may vary depending on car model.
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04 Driver support
Collision Warning with Auto Brake & Pedestrian Protection*
04
* Option/accessory, for more information, see Introduction.177
For the sensors to work correctly, they must be
kept clear of dirt, ice and snow, and be cleaned
regularly with water and car shampoo.
NOTE
Dirt, ice and snow covering the sensors will
reduce their function and may prevent
measurement.
Limitations
Collision Warning with Auto Brake and Pedes-
trian Detection is active from approx. 4 km/h.
The visual warning signal (no. [1] in the illustra-
tion on page 173) may be difficult to notice in
the event of strong sunlight, reflections, when
sunglasses are being worn or if the driver is not
looking straight ahead. The warning sound
should therefore always be activated.
On slippery road surfaces the braking distance
is extended, which may reduce the capacity to
avoid a collision. In such situations the ABS
and DSTC systems will provide best possible
braking force with maintained stability.
NOTE
The visual warning signal can be temporarily
disengaged in the event of high passenger
compartment temperature caused by
strong sunlight for example. If this occurs
then the warning sound is activated even if
it is deactivated in the menu system.
•Warnings may not appear if the dis-
tance to the vehicle in front is small or if
steering wheel and pedal movements
are large, e.g. a very active driving style.
WARNING
Warnings and brake interventions could be
implemented late or not at all if the traffic
situation or external influences mean that
the radar or camera sensor cannot detect a
pedestrian or a vehicle in front correctly.
The sensor system has a limited range for
pedestrians and the system therefore pro-
vides effective warnings and brake inter-
ventions at vehicle speeds up to 50 km/h.
For stationary or slow-moving vehicles,
warnings and brake interventions are effec-
tive at vehicle speeds up to 70 km/h.
Warnings for stationary or slow-moving
vehicles could be disengaged due to dark-
ness or poor visibility.
Warnings and brake interventions for
pedestrians are switched off at vehicle
speeds exceeding 80 km/h.
The collision warning system uses the same
radar sensors as adaptive cruise control. For
more information on the radar sensor and its
limitations, see page 178.
If warnings are perceived as being too frequent
or disturbing then the warning distance can be
reduced. This then leads to the system provid-
ing a warning at a later stage, which reduces
the total number of warnings; see the section
"Set warning distance" on page 176.
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