2016 VOLVO XC70 sensor

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* Option/accessory, for more information, see Introduction.211
Collision warning* – 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, a cyclist, sta-tionary vehicles and vehicles that are movingin the same direction as your vehicle. If thereis a risk of collision with a vehicle, a cyclist ora pedestrian, the driver is alerted by a flash-ing red warning light and an audible warningsignal. The system is active at speeds above3 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, pedestrian or a cyclist,the auto-brake function is activated withoutthe driver pressing the brake pedal. Full brakeforce is applied to help reduce the vehicle’sspeed when the collision occurs or limitedbrake force is applied if this is sufficient toavoid the collision.
NOTE
The auto-brake and brake support func- tions are always on and cannot be turnedoff.
Related information
• Collision warning – introduction (p. 209)
• Collision warning* – operation (p. 212) •
Collision warning* – Pedestrian detection (p. 214)
• Collision warning* – Cyclist detection(p. 213)
• Collision warning* – limitations (p. 215)
• Collision warning – troubleshooting(p. 218)
• Collision warning – symbols and mes-sages (p. 220)

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216* Option/accessory, for more information, see Introduction.
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, a cyclist or a vehicleahead.
• 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/cyclists and provideswarnings and braking effect mosteffectively at speeds up to 30 mph(50 km/h). For stationary or slow-mov-ing vehicles, the system functions bestif your vehicle’s speed is belowapproximately 45 mph (70 km/h).
• Warnings for stationary or slow-mov-ing vehicles may not be provided indark conditions or in poor visibility.
The Pedestrian and Cyclist Detection with Full Auto Brake system uses the same radar sen-sors as Adaptive Cruise Control. For moreinformation on the radar sensor and its limita-tions, see Adaptive Cruise Control – limita-tions (p. 193).
NOTE
If warnings are given too frequently, the warning distance can be reduced (see Col-lision warning* – operation (p. 212)). Thiscauses the system to provide later warn-ings, which decreases the total number ofwarnings 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 Pedestrianand Cyclist Detection with Full AutoBrake 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.
Related information
•
Collision warning – introduction (p. 209)
• Collision warning* – operation (p. 212)
• Collision warning* – function (p. 211)
• Collision warning* – Pedestrian detection (p. 214)
• Collision warning* – Cyclist detection(p. 213)
• The camera’s limitations (p. 217)
• Collision warning – symbols and mes-sages (p. 220)
• Collision warning – troubleshooting(p. 218)

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Collision warning – troubleshooting
Fault tracing and actions
If the message Windscreen Sensors
blocked is displayed, this means that the
camera is obscured and cannot detect pedestrians, cyclists, vehicles or road marker lines in front of the vehicle. This, in turn, means that Pedestrian and Cyclist Detection with Full Auto Brake, DriverAlert Control, Lane Departure Warning or
Lane Keeping Aid will not have full functional-ity. The table lists possible causes for this mes- sage being displayed, and suitable actions.
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.

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* Option/accessory, for more information, see Introduction.219
Maintenance
Camera and radar sensor 7
.
In order to function properly, the camera and radar 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.
Related information
• Collision warning – introduction (p. 209)
• Collision warning* – function (p. 211)
• Collision warning* – operation (p. 212)
• Collision warning* – Pedestrian detection (p. 214)
• Collision warning* – Cyclist detection(p. 213) •
Collision warning* – limitations (p. 215)
• The camera’s limitations (p. 217)
• Collision warning – symbols and mes-sages (p. 220)
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The illustration is generic; details will vary, depending on the model

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Collision warning – symbols and messages
The table lists possible causes for collision warning-related messages being displayed,and suitable actions.A text message can be erased by pressingbriefly on the
OK button on the turn signal
lever.
SymbolMessageDescription
Collis'n warning OFFPedestrian and Cyclist Detection with Full Auto Brake 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 but-
ton.
Collision Warning UnavailablePedestrian and Cyclist Detection with Full Auto Brake 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 bypressing 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 The camera’slimitations (p. 217) for more information on the camera’s limitations.
Radar blocked See manualPedestrian and Cyclist Detection with Full Auto Brake is temporarily not functioning. The radar sensor is blocked, for example by heavy rain or snow that has accumulated in front of the sensor, and cannot detectother vehicles, see Adaptive Cruise Control – limitations (p. 193) for more information on the radar sensor’slimitations.
Collision warn. Service requiredPedestrian and Cyclist Detection with Full Auto Brake is partially or completely not functioning. Contact a trained and qualified Volvo service technician if the message remains in the display.

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Driver Alert Control (DAC) – symbols and messages
Depending on the situation, DAC may display certain symbols and text messages in theinstrument panel or center console screen.
Symbols and messages
Instrument panel
SymbolMessageDescription
Driver Alert Time for a breakThe vehicle has been driven erratically. The driver receives an audible signal and a text message.
Windscreen Sensors blockedThe camera is temporarily not functioning, due to snow, ice, or dirt on the windshield. Clean the area of the windshield in front of the camera. See The camera’s limitations (p. 217) for information on the cam-era’s limitations.
Driver Alert Sys Service requiredThe system is not functioning. Contact a trained and qualified Volvo service technician if the message remains in the display.

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Lane Departure Warning (LDW) – symbols and messages
Symbols and messagesA text message can be erased by pressing briefly on the OK button on the turn signal
lever.
SymbolMessageDescription
Lane departure warning ON/Lane departure warning OFFThe function is switched on or off. The text disappears after 5 seconds.
-Lane Depart Warn AvailableThe function is monitoring the road’s marker lines.
-Lane Depart. Warning Unavailable at this speedThe function has gone into standby mode because the vehicle's speed is below 40 mph (65 km/h).
-Lane Depart Warn Unavaila- bleThe road lacks clear marker lines or the camera is not functioning properly. See The camera’s limitations (p. 217) for information on the camera’s limitations.
Windscreen Sensors blockedThe camera is temporarily not functioning, due to snow, ice, or dirt on the windshield. Clean the area of the windshield in front of the camera. See The camera’s limitations (p. 217) for informationon the camera’s limitations.
Driver Alert Sys Service requiredThe system is not functioning. Contact a trained and qualified Volvo service technician if the mes- sage remains in the display.

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Park assist – introduction
The park assist system is designed to assist you when driving into parking spaces,garages, etc. An audible signal and symbolsin the audio system’s display indicate the dis-tance to the object. The park assist system utilizes ultrasound sensors in the front bumper and rearbumper(s) to measure the distance to a vehi-cle or an object that may be close to the frontor rear of your vehicle.
NOTE
A trailer hitch whose wiring is integrated with the vehicle's electrical system will beincluded in the measurement of the availa-ble space behind the vehicle.
WARNING
Park Assist is an information system, NOT a safety system. This system is designedto be a supplementary aid when parkingthe vehicle. It is not, however, intended toreplace the driver's attention and judge-ment.
Related information
•Park assist – limitations (p. 235)
• Park assist – function (p. 232)
• Park assist – operation (p. 234)
• Park assist – troubleshooting (p. 236) •
Rear Park Assist Camera (PAC) – function (p. 237)
Park assist – function
Signals from the park assist system
View in the display (warning for objects front left/ right rear)
Visual indicatorThe audio system’s display gives an overview of the vehicle’s position in relation to adetected object. The marked sectors in the display indicate that one or more of the sensors has detectedan object. The closer the car symbol comesto a sector, the closer the vehicle is to theobject. If the infotainment system is switched off, the park assist system will not be able to providea visual indicator. An audible signal will stillbe provided.