2015 VOLVO XC90 Owners Manual

D R I V E R S U P P O R T

DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.
240
Driver support systems
The vehicle is equipped with a number of driver support systems that help provide the driver withactive/passive support.
Some of these systems are standard while others are optional and they are designed to e.g., helpthe driver maintain a set speed or a set distanceto a vehicle ahead, or warn the driver of a poten-tial collision situation and in certain cases applythe brakes if necessary. Certain optional systemscan also assist in various parking situations.
Related information
• Adjustable steering force
* (p. 308)
• Electronic Stability Control (ESC) (p. 308)
• Speed limiter (SL)
* (p. 283)
• Cruise Control (CC) (p. 248)
• Adaptive Cruise Control (ACC)
* (p. 252)
• Pilot Assist
* (p. 259)
• Distance Alert
* (p. 314)
• City Safety
™ (p. 273)
• Blind Spot Information (BLIS)
* (p. 315)
• Cross Traffic Alert (CTA)
* (p. 318)
• Driver Alert Control (DAC) (p. 312)
• Driving lane assistance (p. 323)
• Road Sign Information (RSI)
* (p. 290)
• Park Assist
* (p. 292)
• Park Assist Pilot (PAP)
* (p. 301) •
Park Assist Camera (PAC)
* (p. 296)
Driver support system camera
The camera is used by a number of driver sup- port systems to e.g., detect a driving lane's sidemarker lines or traffic signs.
The camera is used by the following driver sup- port systems:
• Lane Departure Warning/Lane Keeping Aid
*
• Driver Alert Control
*
• Pilot Assist
*
• City Safety
• Road sign information
*
• Active high beams
*
Related information
•High and low beam headlights (p. 140)
• Driving lane assistance (p. 323)
• Pilot Assist
* (p. 259)
• Road Sign Information (RSI)
* (p. 290)
• City Safety
™ (p. 273)
• Driver Alert Control (DAC) (p. 312)

DRIVER SUPPORT
241
Camera limitations
The camera used by several of the driver support systems has certain limitations, which also affectthe systems using it.
Reduced visibility
WARNING
• The camera has the same limitations as the human eye. In other words, its

DRIVER SUPPORT
242
CauseAction
Water or snow on the surface of the road swirl up and block radar signals or the camera's view.No action. The driver should be extra alert in conditions of this type.
There is dirt between the inside of the windshield and the camera/radar sensor.Have the area of the windshield cleaned by a trained and quali- fied Volvo service technician.
High temperaturesIf the temperature in the passenger compartment is very high, the camera and radar sensor may betemporarily turned off for approx. 15 minutesafter the engine has been started to protect theirelectronic components. When the temperaturehas cooled sufficiently, the camera and radarsensor will restart automatically.Damaged windshield
CAUTION
•Service and maintenance on City Safety may only be carried out by a trained andqualified Volvo service technician.
• If a crack, scratch or stone chip shouldoccur in the section of the windshield infront the camera/radar sensor, contact atrained and qualified Volvo service techni-cian to repair or replace the windshield.Failing to do so may result in reducedCity Safety functionality.
To help prevent limited or reduced functional- ity, please also observe the following:
• Volvo recommends that cracks, scratches or stone chips on the windshield in front of the camera/radar sensor should
not
be repaired; in such cases, the entire windshield 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 func- tion improperly or not at all.
• Volvo recommends the use of only Genu-ine Volvo Replacement Windshields.
• When replacing windshield wipers, usethe same type or ones approved by Volvo.
After the windshield has been replaced, the camera/radar sensor will have to be recalibra-ted by a trained and qualified Volvo servicetechnician to help ensure proper function ofall of the vehicle's camera-/radar-based sys-tems.
MaintenanceIn order for camera and radar sensor to function properly, the area of the windshield must be keptfree of dirt, ice, snow, etc. and should be washedregularly with a suitable car washing detergent.
Related information
• City Safety
™ (p. 273)
• Radar sensor limitations (p. 245)
• Driver support systems (p. 240)

DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.243
•
Road Sign Assistance (RSI)
* limitations
(p. 291)
• Park Assist Pilot (PAP)
* limitations (p. 305)
• City Safety limitations (p. 278)
• Driving lane assistance (p. 323)
• Adaptive Cruise Control (ACC)
* (p. 252)

DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.
244
Driver support system radar unit
The radar unit is used by a number of driver sup- port systems to e.g., help detect other vehicles.
The radar unit is used by the following functions:
• Distance Alert
*
• Adaptive Cruise Control
*
• Pilot Assist
*
• City Safety
Any modifications to the radar unit may make its use illegal.
Related information
• Radar sensor (p. 269)
• Distance Alert
* (p. 314)
• Adaptive Cruise Control (ACC)
* (p. 252)
• Pilot Assist
* (p. 259)
• City Safety
™ (p. 273)

DRIVER SUPPORT
245
Radar sensor limitations
The radar sensor used by several of the driver support systems has certain limitations, whichalso affect the systems using it.
Obstructions
The marked area must not be obstructed in any way. This area of the windshield should always be kept clean
The radar sensor is located at the upper, center section of the windshield along with the camera.
WARNING
Never place any objects, decals, etc., on the windshield in front of the camera/radar unit.This could reduce or block these components'functions, and could cause one or more of thesystems that utilize the them to stop function-ing.
If this symbol and
Windscreen
sensor Sensor blocked, see
Owner's manual appear in the instru-
ment panel, this indicates that the
camera and/or radar sensor cannot detect other vehicles ahead.
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 camera/radar sensor is dirty or covered by ice or snow.Clean the windshield or remove the ice/ snow.
Thick fog or heavy rain/snow blocks reduces the camera/radar sensor's range of visibility.No action. The driver should be extra alert in conditions of this type.

DRIVER SUPPORT
246
CauseAction
Water or snow on the surface of the road swirl up and block radar signals or the camera's view.No action. The driver should be extra alert in conditions of this type.
There is dirt between the inside of the windshield and the camera/radar sensor.Have the area of the windshield cleaned by a trained and quali- fied Volvo service technician.
The radar sensor's capacity to detect vehicles ahead is impeded:
• if the speed of the vehicle ahead differs greatly from your vehicle's speed.
Limited field of visionThe radar sensor has a limited field of vision. In some situations it may detect a vehicle later thanexpected or not detect other vehicles at all.
Radar sensor's field of vision
In certain situations, the radar sensor cannot detect vehicles at close quarters, for example a 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.
Low trailer in the radar shadow
Low trailers may also be difficult to detect or may not be detected at all. The driver should be extraalert in situations of this type.