2017 VOLVO XC60 sensor

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DRIVER SUPPORT
192The driver will then have to reactivate ACC in one of the following ways: •
By pressing
• By accelerating up to at least 3 mph (4 km/h). ACC will then resume following thevehicle ahead.
Your vehicle will then resume following the vehi-cle ahead at the set time interval.
NOTE
ACC can remain active and keep your vehicle at a standstill for up to 4 minutes. After4 minutes have elapsed, the parking brakewill be engaged and ACC will go into standbymode. To reactivate ACC, the driver must release the parking brake (see Parking brake – generalinformation (p. 267)).
Automatic standby mode when ACC changes target vehicles
If the vehicle ahead turns suddenly, there may be a sta- tionary vehicle ahead
The following only applies at speeds below approximately 18 mph (30 km/h) :
If ACC changes target vehicles (the vehicle thatthe radar sensor has detected) from a movingvehicle to a stationary one, the system will applythe brakes in your vehicle.
WARNING
At speeds above 18 mph (30 km/h), ACC
will not react to a stationary vehicle and apply the brakes but will instead accelerate to thepreviously set speed. The driver must activelyapply the brakes to stop the vehicle.
ACC disengages and goes into standby mode if: • Your vehicle's speed goes below 10 mph (15 km/h) and ACC cannot determine if thetarget object is a stationary vehicle or some other type of object such as e.g., a speedbump.
• Your vehicle's speed goes below 10 mph(15 km/h) and the vehicle ahead turns sothat ACC no longer has a target vehicle tofollow.
No automatic braking when at a
standstill
In certain situations, ACC will no longer apply thebrakes and go into standby mode while the vehi-cle is not moving. This means that the driver willhave to apply the brakes. This happens if:
• The driver presses the brake pedal
• The parking brake is activated
• The gear selected is moved to
P, N or R
• The driver presses the
button to put ACC
in standby mode
The parking brake is applied
automatically
In certain situations, ACC will apply the parking brake in order to continue keeping the vehicle ata standstill. This happens if:
• The driver opens the door or takes off his/her seat belt
• The stability system is put in Sport mode(see Stability system – operation (p. 175))

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193
•
ACC has kept the vehicle at a standstill for more than 2 minutes
• The engine has been switched off
• The brakes have overheated
Related information
•
Adaptive Cruise Control – introduction(p. 184)
Radar sensor
The radar sensor is designed to help detect cars or larger vehicles driving in the same direction asyour vehicle, in the same lane.
The radar sensor and its limitationsIn addition to being used by the Adaptive Cruise Control (ACC), the radar sensor is also used byDistance Alert (see Distance Alert – introduction(p. 199)) and Collision Warning with Full Auto-brake and Pedestrian Detection (see Collisionwarning – introduction (p. 210)).
WARNING
• If there is visible damage to the front grille or you suspect that the radar sensormay be damaged in any way, contact atrained and qualified Volvo service techni-cian as soon as possible. The radar sen-sor may only function partially (or not atall) if it is damaged or is not securely fas-tened in place.
• Accessories or other objects, such asextra headlights, must not be installed infront of the grille.
• Modification of the radar sensor couldmake its use illegal.
The radar sensor's capacity to detect vehicles ahead is impeded: • if the radar sensor is obstructed and cannotdetect other vehicles, for example in heavy rain, or if snow or other objects are obscuringthe radar sensor.
NOTE
Keep the area in front of the radar sensor clean.
•
if the speed of vehicles ahead is significantly different from your own speed.
Related information
•Adaptive Cruise Control – introduction(p. 184)
• Collision warning – introduction (p. 210)
• Distance Alert – introduction (p. 199)

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194
Adaptive Cruise Control – limitationsThe ACC cannot cover all driving situations and traffic, weather and road conditions.
Situations where ACC may not function optimally
WARNING
• The radar sensor has a limited field of vision. In some situations it may detect avehicle later than expected or not detectother vehicles at all.
• If ACC is not functioning properly, cruisecontrol will also be disabled.
Radar sensor's field of vision (shown in pink)
In certain situations, the radar sensor cannot detect vehicles at close quarters, for examplea vehicle that suddenly enters the lanebetween your vehicle and the target vehicle.
Small vehicles, such as motorcycles, or vehi- cles not driving in the center of the lane mayremain undetected.
In curves, the radar sensor may detect the wrong vehicle or lose sight of the target vehi-cle.
WARNING
•
Adaptive Cruise Control cannot cover all driving situations and traffic, weather androad conditions. The "Function" sectionprovides information about limitations thatthe driver must be aware of before usingthis feature.
• This system is designed to be a supple-mentary driving aid. It is not, however,intended to replace the driver's attentionand judgement. The driver is responsiblefor maintaining a safe distance and speedand must intervene if Adaptive CruiseControl does not maintain a suitablespeed or suitable distance to the vehicleahead.
• Maintenance of ACC components mayonly be performed by a trained and quali-fied Volvo technician.

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198
Adaptive Cruise Control – troubleshooting
If the message Radar blocked See manual is
displayed, this means that the radar signals from the sensor have been obstructed and that a vehi- cle ahead cannot be detected. This, in turn, means that the functions of the ACC, Distance Alert, and Collision Warning Sys-
tem with Auto-brake and Pedestrian Detectionwill not function. The table lists possible causes for this message being displayed, and suitable actions.
CauseAction
The surface of the radar in the grille is dirty or obstructed in some way.Clean the radar surface, or remove the object causing the obstruction.
Heavy rain or snow is interfering with the radar signals.No action possible. Heavy precipitation may affect the function of the radar.
Swirling water or snow from the surface of the road may interfere with the radar signals.No action possible. A very wet or snow-covered road surface may affect the function of the radar.
The surface of the radar is clean but the message remains in the display.Wait a short time. It may take several minutes for the radar to detect that it is no longer obstructed.
Related information
•
Adaptive Cruise Control – introduction (p. 184)

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202
Distance Alert – symbols and messagesDistance Alert is part of Adaptive Cruise Control and is a function that provides information aboutthe time interval to the vehicle ahead.Symbols and text messagesA text message can be erased by pressing briefly on the OK button on the turn signal lever.
SymbolMessageDescription
Radar blocked See manualDistance Alert has been temporarily disconnected because the radar is obstructed in some way and cannot detect other vehicles. See Adaptive Cruise Control – limitations (p. 194) for information on the radar sensor

DRIVER SUPPORT
204•
City Safety – symbols and messages (p. 208)
• City Safety – Laser sensor (p. 209)
City Safety – function
Function
Location of the laser sensor in the windshield 6
City Safety
™ monitors traffic ahead of you using
a laser sensor mounted in the upper section of the windshield. If a collision is imminent, City Safety ™ will automatically apply the brakes,
which may feel like hard braking. If the difference in speed between your vehicle and the vehicle ahead is more than approximately 9 mph (15 km/h), City Safety ™ alone cannot
prevent a collision from taking place. The driver must apply the brakes to help avoid a collision orreduce its effect. When the function activates and applies the brakes, a message will appear in the information display to indicate that the system is/has beenactive.
NOTE
•
When City Safety
™ applies the brakes,
the brake lights will illuminate.
• In cases where City Safety
™ has stopped
the vehicle, the system will then release the brakes. The driver must apply thebrakes to keep the vehicle at a standstill.
Related information
• City Safety – introduction (p. 203)
• City Safety – operation (p. 205)
• City Safety – limitations (p. 205)
• City Safety – troubleshooting (p. 206)
• City Safety – symbols and messages (p. 208)
• City Safety – Laser sensor (p. 209)
6
The illustration is generic; certain details may vary from model to model

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205
City Safety – operation
Using City Safety™
NOTE
The City Safety™ function is activated auto-
matically each time the engine has been switched off and restarted.
On and OffIn certain situations, it may be desirable to switch City Safety ™ off, such as when driving in close
quarters where leaves, branches, etc. may obscure the hood and windshield. When the engine is running, City Safety ™ can be
switched off as follows: Press My Car in the center console control panel
and go to
SettingsCar settingsDriver
support systems
City Safety. Select Off.
If the engine is switched off, City Safety ™ will
reactivate when the engine is restarted.
WARNING
The laser sensor emits light when the ignition is in mode II or higher, even if City Safety ™
has been switched off.
To switch City Safety ™ on again: •
Follow the same procedure as for switching City Safety
™ off but select
On.
Related information
• City Safety – introduction (p. 203)
• City Safety – function (p. 204)
• City Safety – limitations (p. 205)
• City Safety – troubleshooting (p. 206)
• City Safety – symbols and messages (p. 208)
• City Safety – Laser sensor (p. 209)
• My Car – introduction (p. 77)
City Safety – limitations
Limitations
WARNING
The laser sensor has certain limitations and its function may be reduced (or it may notfunction at all) in conditions such as heavyrain or snowfall, or by dense fog or thick,blowing dust or snow. Condensation, dirt, iceor snow on the windshield may also interferewith the sensor

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DRIVER SUPPORT
206may not be detected. Normally, the license plate and taillight reflectors give the rear section of avehicle ahead sufficient reflective surfaces to bedetected.
NOTE
•
Keep the windshield in front of the laser sensor free of ice, snow, dirt, etc., see CitySafety – function (p. 204).
• Snow or ice on the hood deeper than2 inches (5 cm) may obstruct the sensor.Keep the hood free of ice and snow.
• Do not mount or in any way attach any-thing on the windshield that couldobstruct the laser sensor.
Related information
• City Safety – introduction (p. 203)
• City Safety – function (p. 204)
• City Safety – operation (p. 205)
• City Safety – troubleshooting (p. 206)
• City Safety – symbols and messages (p. 208)
• City Safety – Laser sensor (p. 209)
City Safety – troubleshooting
TroubleshootingIf Windscreen Sensors blocked appears in the
information display, this indicates that the City Safety ™ laser sensor is obstructed in some way
and cannot detect vehicles ahead of you, which means that the system is not functioning. However, this message will not be displayed in all situations in which the sensor is obstructed. Forthis reason, the driver must ensure that the areaof the windshield in front of the sensor is alwayskept clean. The following table shows some of the situations that can cause the message to be displayed andsuggested actions.
CauseAction
The area of the windshield in front of the sensor isdirty or covered by ice orsnow.Clean the wind- shield or removethe ice/snow.
The laser sensor's field of view is obstructed.Remove the obstruction.
NOTE
If a crack, scratch or stone chip should occur in the section of the windshield in front thelaser sensor, contact a trained and qualifiedVolvo service technician to repair or replacethe windshield (see the illustration showingthe location of the sensor in City Safety –function (p. 204)). Failing to do so may result in reduced City Safety ™ functionality.
To help prevent limited or reduced functional- ity, please also observe the following:
• Volvo recommends that cracks, scratchesor stone chips on the windshield in front of the laser sensor
should not be
repaired; in such cases, the entire wind- shield should be replaced.
• Before the windshield is replaced, con-tact a Volvo retailer to ensure that thecorrect windshield is ordered and instal-led. If the wrong type of windshield is used, this may cause City Safety
™ to
function improperly or not at all. Volvo recommends the use of only GenuineVolvo Replacement Windshields.
• When replacing windshield wipers, usethe same type or ones approved by Volvo.
Related information
• City Safety – introduction (p. 203)
• City Safety – function (p. 204)