2014 VOLVO XC70 Owner´s Manual

04 Driver support
City Safety™
04
167
SymbolMessageMeaning/action required
Auto braking by City SafetyCity Safety™ is applying/has applied the brakes automatically.
Windscreen Sensors blockedThe laser sensor is temporarily not functioning due to an obstruction.
• Remove the obstruction and/or clean the windshield in front of the sensor(s).
For more information on the sensor’s limitations, see page 164.
City Safety Service requiredCity Safety™ is not functioning.
• If this message remains in the display, have the system checked by a trained and qualified Volvo service technician.

04 Driver support
Collision warning with Full Auto-brake and Pedestrian Detection*
04
168* Option/accessory, for more information, see Introduction.
Introduction
Collision Warning with Full Auto-brake and Pedestrian Detection is designed to assist thedriver if there is a risk of a collision with apedestrian, a vehicle ahead that is at a stand-still or one that is moving in the same direc-tion as your vehicle. Collision Warning consists of the following three functions:
• Collision Warning
warns the driver of a
potential collision situation.
• Brake Support
helps the driver brake
efficiently in a critical situation.
• Auto-brake
brakes the vehicle automati-
cally if a collision with a pedestrian or another vehicle cannot be avoided andthe driver does not apply the brakes intime or steer around the person/vehicle.Auto-brake can help prevent a collision orreduce the speed at which a collisionoccurs.
Since Collision Warning with Full Auto-brake and Pedestrian Detection is activated in cir-cumstances where the driver should havebegun braking much sooner, the system willnot be able to assist the driver in all situa-tions. This system is designed to activate as late as possible to help avoid unnecessary interven-tion. The system should not be used in such a waythat the driver changes his/her way of operat-ing the vehicle. If the driver relies entirely onthe system, the chances of an accident even-tually occurring increase considerably. The Collision Warning and City Safety™ sys- tems supplement each other. See page 162for detailed information about City Safety™.
WARNING
No automatic system can be guaranteed to function 100% correctly in all situations.For that reason, never test the Auto-brakesystem by driving toward a person orobject. This could result in serious injury ordeath.
WARNING
•
Collision Warning does not work in all driving, traffic, weather and road con-ditions. It does not react to vehiclesnot traveling in the same direction asyour vehicle.
• Collision Warning does not react toanimals.
• Warnings are only provided when therisk of collision is high. The "Function"section provides information aboutlimitations that the driver must beaware of before using Collision Warn-ing.
• Collision Warning will not provide awarning or brake the vehicle forpedestrians at speeds above 50 mph(80 km/h).

04 Driver support
Collision warning with Full Auto-brake and Pedestrian Detection*
04
* Option/accessory, for more information, see Introduction.169
WARNING
• Collision Warning will not provide a warning or brake the vehicle forpedestrians in darkness or in tunnels,even if there is street lighting in thearea.
• The auto-brake function can help pre-vent a collision or reduce the speed atimpact but the driver should alwaysapply the brakes for the best possiblebraking effect, even if auto-brake isactively applying the brakes.
• Never wait for a collision warning. Thissystem is designed to be a supple-mentary driving aid. It is not, however,intended to replace the driver's atten-tion and judgement. The driver isresponsible for maintaining a safe dis-tance and speed, even when the colli-sion warning system is in use.
• Maintenance of the Collision Warningsystem's components must only beperformed by a trained and qualifiedVolvo technician.
Function
Function overview
Audio-visual warning signals, collision risk
Radar sensor
Camera
Collision WarningThe radar sensor and the camera work together to detect a pedestrian, stationaryvehicles and vehicles that are moving in thesame direction as your vehicle. If there is arisk of collision with a vehicle or a pedestrian,the driver is alerted by a flashing red warninglight and an audible warning signal. Collisionwarning is active at speeds above 3 mph(4 km/h).
Brake SupportIf the risk of collision continues to increaseafter the collision warning has been given,Brake Support is activated. Brake Supportprepares the brake system to react quickly,and the brakes are applied slightly. This maybe experienced as a light tug. If the brakes are applied quickly, full braking effect will be provided. Brake Support alsoincreases brake force if the system deter-mines that the driver has not applied ade-quate pressure on the brake pedal.
Auto-brakeIf a collision is imminent and the driver hasnot applied the brakes or begun to steeraround the vehicle or pedestrian, the auto-brake function is activated without the driverpressing the brake pedal. Full brake force isapplied to help reduce the vehicle’s speedwhen the collision occurs or limited brakeforce is applied if this is sufficient to avoid thecollision.
NOTE
The auto-brake and brake support func- tions are always on and cannot be turnedoff.

04 Driver support
Collision warning with Full Auto-brake and Pedestrian Detection*
04
170* Option/accessory, for more information, see Introduction.
Operation
Settings are made by pressing MY CAR on
the center console control panel and using the menus displayed.
Activating/deactivating both warning
signals
To switch Collision Warning's audible and
visual signals on or off at the same time,
press MY CAR on the center console control
panel and go to
SettingsCar settings
Driver support systemsCollision
Warning. If Collision Warning is on, the sys-
tem will perform a self-test each time the engine is started by briefly illuminating thewarning light. See page 199 for a descriptionof the menu system. When the engine is switched on, the Collision Warning setting that was being used when itwas switched off will be the default setting.
NOTE
The auto-brake and pedestrian detection features are always on, even if the audibleand visual warning signals have beendeactivated.
Activating/deactivating the audible warning signal only
The audible warning signal can be activated/ deactivated by pressing MY CAR on the cen-
ter console control panel and going to
SettingsCar settingsDriver support
systems
Warning sound if risk of
collision.
Setting a warning distanceThis setting determines the distance at which the visual and audible warnings are triggered. Select
Long, Normal or Short by pressing
MY CAR on the center console control panel
and going to
SettingsCar settings
Driver support systemsCollision
Warning
Warning distance.
The warning distance determines the level of sensitivity used by the system. The warning distance
Long provides an earlier warning.
Begin by using Long and if the system gives
too many warnings, try changing to Normal.
WARNING
• The setting Short should only be used
in situations where traffic is light and moving at low speeds.
• Collision Warning alerts the driver tothe risk of a collision but this functioncannot reduce the driver’s reactiontime.
• For Collision Warning to be as effec-tive as possible, it is recommendedthat Distance Alert be set to 4 or 5, seepage 159.
NOTE
•When Adaptive Cruise Control is used, the warning light and signal will beused by that function, even if thewarnings provided by Collision Warn-ing have been deactivated by thedriver.
• In situations where traffic is moving atconsiderably different speeds, or if thevehicle ahead brakes suddenly, warn-ings may be considered to be late, even if the setting
Long has been
selected.
Checking settingsThe current Collision Warning settings can be checked by pressing MY CAR on the center

04 Driver support
Collision warning with Full Auto-brake and Pedestrian Detection*
04
* Option/accessory, for more information, see Introduction.171
console control panel and going to
Settings
Car settingsDriver support systems
Collision Warning.
Maintenance
Camera and radar sensor
1
.
In order to function properly, the camera and laser sensor must be kept clean. Dirt, ice,snow, etc., will reduce the function of thesecomponents. Remove ice and snow when necessary and wash these areas regularly with a suitable carwashing liquid.
Limitations
Strong sunlight, reflections, extreme light contrasts, the use of sunglasses, or if thedriver is not looking straight ahead may makethe visual warning signal in the windshield dif-ficult to see. For this reason, always activatethe audible warning signal. Slippery driving conditions increase braking distance, which can reduce the system'scapacity to avoid a collision. In these condi-tions, the ABS and DSTC systems providethe best possible braking effect while helpingto maintain stability.
NOTE
The visual warning signal may be tempo- rarily disengaged in the event of high pas-senger compartment temperature due tostrong sunlight, etc. If this occurs, theaudible warning signal will be used, even ifit has been deactivated in the menu sys-tem.
WARNING
• In certain situations, the system can- not provide warnings or warnings maybe delayed if traffic conditions or otherexternal factors make it impossible forthe radar sensor or camera to detect apedestrian or a vehicle ahead.
• Warnings may not be provided if thedistance to the vehicle ahead is short,or if movements of the steering wheel/brake pedal are great, such as duringactive driving.
• The sensor system has a limited rangefor pedestrians and provides warningsand braking effect most effectively atspeeds up to 30 mph (50 km/h). Forstationary or slow-moving vehicles, thesystem functions best if your vehicle’sspeed is below approximately 45 mph(70 km/h).
• Warnings for stationary or slow-mov-ing vehicles may not be provided indark conditions or in poor visibility.
The Collision Warning system uses the same radar sensors as Adaptive Cruise Control. Formore information on the radar sensor and itslimitations, see page 155.
1
The illustration is generic; details will vary, depending on the model

04 Driver support
Collision warning with Full Auto-brake and Pedestrian Detection*
04
172* Option/accessory, for more information, see Introduction.
NOTE
If warnings are given too frequently, the warning distance can be reduced (seepage 170). This causes the system to pro-vide later warnings, which decreases thetotal number of warnings provided.
WARNING
• The system is not activated at speeds under approx. 2 mph (4 km/h). There-fore, it will not brake your vehicle if youapproach a vehicle ahead at very lowspeed, such as when parking.
• The driver's actions always have high-est priority and override the CollisionWarning system. This means that thesystem will not intervene in situationswhere the driver is actively steering,braking or pressing the acceleratorpedal, even if a collision is imminent.
• When Auto-brake has prevented a col-lision with a stationary object, yourvehicle will remain at a standstill forapprox. 1.5 seconds. If your vehiclehas been braked for a moving vehicleahead, your vehicle's speed will bereduced to the same speed as thatvehicle's.
The camera’s limitationsThe camera is used by Collision Warning with Auto-brake, Driver Alert Control (seepage 176), and Lane Departure Warning (seepage 179).
NOTE
•To help protect the camera in very hot conditions, it may be temporarilyswitched off for approximately 15minutes after the engine has beenstarted.
• Keep the section of the windshield infront of the camera clean and free ofice, snow, or condensation.
WARNING
•The camera has the same limitations as the human eye. In other words, its“vision is impaired” by adverseweather conditions such as heavysnowfall, dense fog, etc. These condi-tions may reduce the function of sys-tems that depend on the camera orcause these systems to temporarilystop functioning.
• Never place any objects, decals, etc.,on the windshield in front of the cam-era. This could reduce or block thecamera’s function, and could causeone or more of the systems that utilizethe camera to stop functioning.
• Strong sunlight, reflections from theroad surface, ice or snow covering theroad, a dirty road surface, or unclearlane marker lines may drasticallyreduce the camera’s capacity todetect the side of a lane, a pedestrianor another vehicle.

04 Driver support
Collision warning with Full Auto-brake and Pedestrian Detection*
04
* Option/accessory, for more information, see Introduction.173
Pedestrians
The system cannot identify all pedestrians
The Collision Warning system can only iden- tify and detect a pedestrian who is standingupright. This person can be standing still,walking or running. This means that the system has to be able to identify a person's head, arms, shoulders,legs, the upper and lower parts of the bodyand a person's pattern of movement whenwalking or running. If parts of the body are not visible to the cam- era, the system cannot detect the pedestrian. The following conditions apply:
• In order to detect a pedestrian, the sys- tem must have a full view of the person'sentire body and the person must be atleast 32 in. (80 cm) tall.
• The system cannot detect a pedestriancarrying a large object.
• The camera's capacity to see a pedes-trian at dawn or dusk is limited, much asit is for the human eye.
• The camera's function is deactivated andwill not detect a pedestrian in darkness orin tunnels, even if there is street lighting inthe area.
WARNING
• Collision Warning with Full Auto-brake and Pedestrian Detection is designedto be a supplementary driving aid. It isnot, however, intended to replace thedriver's attention and judgement. Thedriver is always responsible for operat-ing the vehicle in a safe manner.
• The system cannot detect all pedes-trians in all situations, such as in dark-ness/at night and cannot detect parti-ally hidden pedestrians, people whoare less than approx. 32 in. (80 cm)tall, or people wearing clothing thatobscures the contours of their bodies.
Fault tracing and actions
If the message Windscreen Sensors
blocked is displayed, this means that the
camera is obscured and cannot detect pedestrians, vehicles or road marker lines infront of the vehicle. This, in turn, means that Collision Warning with Full Auto-brake and Pedestrian Detec-tion, Lane Departure Warning, and DriverAlert Control will not have full functionality. The table lists possible causes for this mes- sage being displayed, and suitable actions.

04 Driver support
Collision warning with Full Auto-brake and Pedestrian Detection*
04
174* Option/accessory, for more information, see Introduction.
CauseAction
The surface of the windshield in front of the camera is dirty or covered with ice or snow.Clean or clear the section of the windshield in front of the camera.
Fog, heavy rain or snow is interfering with the function of the camera.No action possible. Heavy precipitation may affect the function of the camera.
The surface of the windshield is clean but the message remains in the display.Wait a short time. It may take several minutes for the camera to regis- ter visibility.
The surface between the inside of the windshield and the camera is dirty.Contact an authorized Volvo retailer or service technician to have this surface cleaned.
Symbols and messages in the display
SymbolMessageDescription
Collision Warning OffCollision Warning is switched off. This message is displayed when the engine is started and will disappear after approx. 5 seconds. It can also be erased by pressing the OK button.
Collision Warning UnavailableCollision Warning cannot be activated. This message is displayed when the driver attempts to activate the function. It will disappear after approx. 5 seconds or can be erased by pressing the OK button.
Auto braking was activatedAuto-braking has been active. This message can be erased by pressing the OK button.
Windscreen Sen- sors blockedThe camera is temporarily not functioning. This message is displayed if the camera is obstructed by snow, ice, dirt, etc., on the windshield. Clean the area of the windshield in front of the camera, see page 172 formore information on the camera’s limitations.