Page 206 of 398

DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.
204
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, stationary vehi-cles and vehicles that are moving in the samedirection as your vehicle. If there is a risk of colli-sion with a vehicle, a cyclist or a pedestrian, thedriver is alerted by a flashing red warning lightand an audible warning signal. The system isactive at speeds above 3 mph (4 km/h).
Brake SupportIf the risk of collision continues to increase afterthe collision warning has been given, Brake Sup-port is activated. Brake Support prepares thebrake system to react quickly, and the brakes areapplied slightly. This may be experienced as alight tug. If the brakes are applied quickly, full braking effect will be provided. Brake Support alsoincreases brake force if the system determinesthat the driver has not applied adequate pressureon the brake pedal.
Auto-brakeIf a collision is imminent and the driver has notapplied the brakes or begun to steer around thevehicle, pedestrian or a cyclist, the auto-brakefunction is activated without the driver pressingthe brake pedal. Full brake force is applied tohelp reduce the vehicle
Page 211 of 398
DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.209
WARNING
•In certain situations, the system cannot provide warnings or warnings may bedelayed if traffic conditions or other exter-nal factors make it impossible for theradar sensor or camera to detect apedestrian, a cyclist or a vehicle ahead.
• Warnings may not be provided if the dis-tance to the vehicle ahead is short, or ifmovements of the steering wheel/brakepedal are great, such as during activedriving.
• The sensor system has a limited range forpedestrians/cyclists and provides warn-ings and braking effect most effectively atspeeds up to 30 mph (50 km/h). For sta-tionary or slow-moving vehicles, the sys-tem functions best if your vehicle
Page 213 of 398

DRIVER SUPPORT
}}
211
Collision warning – troubleshooting
Fault tracing and actionsIf the message Windscreen Sensors blockedis displayed, this means that the camera isobscured and cannot detect pedestrians, cyclists, vehicles or road marker lines in front of the vehi-cle. This, in turn, means that Pedestrian and Cyclist Detection with Full Auto Brake, Driver Alert Con-trol, Lane Departure Warning or Lane KeepingAid will not have full functionality. The table lists possible causes for this message 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 cam- era.
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 register vis- ibility.
The surface between the inside of the windshield and the camera is dirty.Contact an authorized Volvo retailer or service technician to have this sur- face cleaned.
Page 214 of 398
||
DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.
212
Maintenance
Camera and radar sensor 6
.
In order to function properly, the camera and radar sensor must be kept clean. Dirt, ice, snow,etc., will reduce the function of these compo-nents. Remove ice and snow when necessary and wash these areas regularly with a suitable car washingliquid.
Related information
• Collision warning – introduction (p. 202)
• Collision warning
* – function (p. 204)
• Collision warning
* – operation (p. 205)
• Collision warning
* – Pedestrian detection
(p. 207) •
Collision warning
* – Cyclist detection
(p. 206)
• Collision warning
* – limitations (p. 208)
• The camera
Page 221 of 398
DRIVER SUPPORT
}}
219
Driver Alert Control (DAC) – symbols and messages Depending on the situation, DAC may display certain symbols and text messages in the instru-ment 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 wind- shield in front of the camera. See The camera
Page 234 of 398

||
DRIVER SUPPORT
232
Audible signal
The Park Assist system uses an intermittent tone that pulses faster as you come close to an object,and becomes constant when you are withinapproximately 1 ft (30 cm) of an object in front ofor behind the vehicle. If there are objects withinthis distance both behind and in front of the vehi-cle, the tone alternates between front and rearspeakers.
NOTE
The level of the audible signal can be low- ered/raised with the infotainment volumecontrol. The level can also be set in the MYCAR menu system. See My Car – introduction(p. 71) for a description of the menu system.
If the volume of another source from the audio system is high, this will be automatically lowered.
Rear park assist
The distance monitored behind the vehicle is approximately 5 ft (1.5 m). The audible signalcomes from the rear speakers. The system must be deactivated when towing a trailer, carrying bicycles in a rear-mounted carrier,etc, which could trigger the rear park assist sys-tem's sensors.
NOTE
•Rear park assist is deactivated automati- cally when towing a trailer if Volvo genu-ine trailer wiring is used. If a non-Volvotrailer hitch is being used, it may be nec-essary to switch off the system manually,see Park assist – operation (p. 233).
• The system will not detect high objects,such as a loading dock, etc.
• Objects such as chains, thin shiny polesor low objects may temporarily not bedetected by the system. This may resultin the pulsing tone unexpectedly stoppinginstead of changing to a constant tone asthe vehicle approaches the object. Insuch cases, use caution when backing upor stop the vehicle to help avoid damage.
Page 235 of 398

DRIVER SUPPORT
}}
* Option/accessory, for more information, see Introduction.233
Front park assist
The distance monitored in front of the vehicle is approximately 2.5 ft (0.8 m). The audible signalcomes from the audio system's front speakers. It may not be possible to combine auxiliary head- lights and front park assist since these lightscould trigger the system's sensors.
NOTE
Front park assist is deactivated when the parking brake is applied and or when the gear selector is in the P position.
Related information
• Park assist – introduction (p. 231)
• Park assist – limitations (p. 234)
• Park assist – operation (p. 233)
• Park assist – troubleshooting (p. 239) •
Rear Park Assist Camera (PAC) – function (p. 240)
Park assist – operation
Function
Park assist and CTA
* button
The system is activated automatically when the vehicle is started. The indicator light in the buttonin the center console illuminates when the sys-tem is on. • The front park assist system is active from the time the engine is started until the vehi-cle exceeds a speed of approximately 6 mph(10 km/h). It is also active when the vehicleis backing up.
• Rear park assist is active when the engine isrunning and reverse gear has been selected.
Page 236 of 398

||
DRIVER SUPPORT
234
Activating/deactivating
The system is activated automatically when the vehicle is started.
–Press the Park assist button on the center console to temporarily deactivate the sys-tem(s).
> The indicator light in the button will go outwhen the system has been deactivated.
Park assist will be automatically reactivated the next time the engine is started, or if the button ispressed (the indicator light in the button will illu-minate).
NOTE
Park assist is disengaged automatically when the parking brake is applied.
Related information
• Park assist – introduction (p. 231)
• Park assist – limitations (p. 234)
• Park assist – function (p. 231)
• Park assist – troubleshooting (p. 239)
• Rear Park Assist Camera (PAC) – function (p. 240)
Park assist – limitations
Cleaning the sensorsThe sensors must be cleaned regularly to ensure that they work properly. Clean them with waterand a suitable car washing detergent.
Location of the front sensors
Location of the rear sensors
Ice and snow covering the sensors may cause incorrect warning signals.
NOTE
If the sensors are obstructed by e.g., dirt, snow, or ice, this could result in false warningsignals from the park assist system or thesystem may not function at all.
Related information
•Park assist – introduction (p. 231)
• Park assist – function (p. 231)
• Park assist – operation (p. 233)
• Park assist – troubleshooting (p. 239)
• Rear Park Assist Camera (PAC) – function (p. 240)