2018 VOLVO XC90 T8 trailer

DRIVER SUPPORT
347
Rear Collision Warning
The Rear Collision Warning (RCW) function can help the driver avoid rear-end collisions fromvehicles approaching from behind.
RCW is automatically activated each time the engine is started. RCW can warn the driver of a potential collision with vehicles approaching from behind by rapidlyflashing the turn signals. If, at a speed below 30 km/h (20 mph), the RCW function detects that the car is in danger of beinghit from behind, the seatbelt tensioners may ten-sion the front seatbelts and activate the WhiplashProtection System safety system. Immediately before a collision from behind, RCW may also activate the foot brake in order toreduce the forward acceleration of the car duringthe collision. However, the brakes will only beapplied if your vehicle is stationary. The brakeswill be immediately released if the acceleratorpedal is depressed.
Related information
• Rear Collision Warning limitations (p. 347)
• Whiplash Protection System (p. 46)
Rear Collision Warning limitations
In some situations, it may be difficult for RCW to warn the driver of a collision risk.
This may be the case if:
• the vehicle approaching from the rear is detected at a late stage
• the vehicle approaching from the rearchanges lanes at a late stage
• the vehicle approaching from the rear is mov-ing at a speed above 80 km/h (50 mph)
• a trailer, bicycle holder or similar is con-nected to the vehicle's electrical system - theRCW function will then be automaticallydeactivated.
NOTE
In certain markets RCW does
not warn with
the direction indicators due to local traffic regulations – in such cases, that part of thefunction is deactivated.
NOTE
The warning with direction indicators for Rear Collision Warning is deactivated if the colli-sion warning distance in the City Safety func- tion is set to the lowest level "
Late".
The seat belt tensioning and braking func- tions remain active.
Related information
• Rear Collision Warning (p. 347)

||
DRIVER SUPPORT
* Option/accessory.
350
Related information
• BLIS
* (p. 348)
BLIS limitations
BLIS 82
functionality may be reduced in certain
situations.
Keep this area clean (on both the left and right sides of the vehicle) 83
.
Examples of limitations:
• Dirt, ice and snow covering the sensors may reduce functionality and prevent the systemfrom providing warnings.
• The BLIS function is automatically deacti-vated if a trailer, bicycle holder or similar isconnected to the vehicle's electrical system.
• For BLIS to function optimally, bicycle hold-ers, luggage racks or similar should not bemounted on the vehicle's towbar.
WARNING
•BLIS does not work in sharp curves.
• BLIS does not work when the vehicle is being reversed.
Related information
•
BLIS
* (p. 348)
80
Blind Spot Information
81 Note: This illustration is general and details may vary depending on model.
82 Blind Spot Information
83 Note: This illustration is general and details may vary depending on model.

DRIVER SUPPORT
* Option/accessory.
352
BLIS messages
A number of messages related to BLIS 85
may
be displayed in the instrument panel.
Some examples of symbols and messages are shown in the table below.
MessageMeaning
Blind spot sensor Service requiredThe system is not functioning as intended. Contact a workshop ‒ an authorized Volvo workshop is recommended.
Blind spot system off Trailer attachedBLIS and CTA have been deactivated because a trailer has been connected to the vehicle's electrical system.
A text message can be erased by briefly pressing the
button in the center of the right-side
steering wheel keypad. If the message persists: Contact a workshop ‒ an
authorized Volvo workshop is recommended.
Related information
• BLIS
* (p. 348)
85
Blind Spot Information

DRIVER SUPPORT
* Option/accessory.355
Examples of further limitations
•Dirt, ice and snow covering the sensors may reduce functionality and prevent the systemfrom providing warnings. For additional infor-mation, see the section "Recommendedmaintenance for Cross Traffic Alert".
• CTA is automatically deactivated if a trailer,bicycle holder or similar is connected to thevehicle's electrical system.
• For CTA to function optimally, bicycle hold-ers, luggage racks or similar should not bemounted on the vehicle's towbar.
Related information
•
Cross Traffic Alert
* (p. 353)
Recommended maintenance forCross Traffic Alert
• For optimal performance, it is important to keep the areas in front of the sensors clean.
• Do not attach any objects, tape or decals tothe surface of the sensors.
Keep this area clean (on both the left and right sides of the vehicle) 92
.
The CTA sensors are located on the inside of each of the rear fenders/bumpers and are also used by the BLIS 93
and Rear Collision Warning
functions.
CAUTION
Repair of BLIS and CTA components or repainting of the bumper may only be per-formed by a workshop – an authorized Volvoworkshop is recommended.
Related information
• Cross Traffic Alert
* (p. 353)
• BLIS
* (p. 348)
• Rear Collision Warning (p. 347)
92
Note: This illustration is general and details may vary depending on model.
93 Blind Spot Information

DRIVER SUPPORT
* Option/accessory.
356
Cross Traffic Alert messages
A number of messages related to CTA 94
may be
displayed in the instrument panel.
Some examples of symbols and messages are shown in the table below.
MessageMeaning
Blind spot sensor Service requiredThe system is not functioning as intended. Contact a workshop ‒ an authorized Volvo workshop is recommended.
Blind spot system off Trailer attachedBLIS and CTA have been deactivated because a trailer has been connected to the vehicle's electrical system.
A text message can be erased by briefly pressing the
button in the center of the right-side
steering wheel keypad. If the message persists: Contact a workshop ‒ an
authorized Volvo workshop is recommended.
Related information
• Cross Traffic Alert
* (p. 353)
94
Cross Traffic Alert

||
DRIVER SUPPORT
* Option/accessory.
362 •
signs partially or fully covered by frost, snow and/or dirt
• digital road maps 105
that are outdated, incor-
rect or do not contain speed information 106
.
NOTE
Certain types of bike carriers that are con- nected to the trailer socket may be interpre-ted as a connected trailer by the RSI function.In such cases, the instrument panel may indi-cate incorrect speed information.
NOTE
The function uses the vehicle's camera unit, which has some general limitations – see thesection "Camera unit limitations".
Related information
• Road Sign Information
* (p. 357)
Driver Alert Control
The Driver Alert Control (DAC) function is designed to help capture the driver becomeaware of erratic behavior, e.g. if the driver is dis-tracted or showing signs of fatigue.
The objective of DAC is to detect slowly deterio- rating driving behavior and is primarily intended tobe used on major roads. The function is notintended for use in city traffic. DAC is activated when the vehicle's speed exceeds 65 km/h (40 mph) and remains activeas long as speeds are above 60 km/h (37 mph).
A camera monitors the traffic lane's marker lines and compares the direction of the road with thedriver's movements of the steering wheel.
If the driving behavior becomes noticeably erratic, the driver willbe alerted by this symbol in theinstrument panel and the mes- sage
Time for a break
soon?.
If driving behavior does not improve but instead becomes even more erratic, the driver will bealerted by the same symbol in the instrument panel, an audible signal and the message
Time
for a break.
If the Rest Stop Guidance function is activated
in Sensus Navigation * when the Time for a
break warning is given, suggestions will also be
provided for suitable places to take a break.
105 Vehicles equipped with Sensus Navigation.
106 Map data and speed information is not available for all areas.

DRIVER SUPPORT
382
Park Assist front, rear and sides
Park Assist has different parameters depending on which part of the vehicle is approaching anobstacle.
Back
Note: This illustration is general and details may vary depending on model.
The rear sensors will be activated if the vehicle begins rolling backward or if reverse gear isengaged. The distance monitored begins approx. 1.5 meters (5 feet) behind the vehicle. The rear sensors will be automatically deactivated if the vehicle is backing up with a trailer attached.
NOTE
When reversing with e.g. a trailer or bike car- rier on the trailer hitch – without Volvo originaltrailer cables – the Parking Assist system mayhave to be turned off manually to prevent thesensors from reacting to these.
Side sensors
Park Assist's side sensors are automatically acti- vated when the engine is started. They are activeat speeds below 10 km/h (6 mph). The distance monitored begins approx. 30 cm (1 ft) from the sides. The audible signal for obsta-cles along the sides of the vehicle is emittedfrom the side speakers.
Front camera
Note: This illustration is general and details may vary depending on model.
Park Assist's front sensors are automatically acti- vated when the engine is started. The front sen-sors are active at speeds below 10 km/h(6 mph). The distance monitored begins approx. 80 cm (2.5 ft) in front of the vehicle.
NOTE
The Parking Assist system is deactivated when the parking brake is applied or when P
is selected on vehicles with automatic trans- mission.

DRIVER SUPPORT
}}
* Option/accessory.383
CAUTION
When installing auxiliary lights: Make sure these do not obscure the sensors – the auxili-ary lights could be perceived as an obstacle.
Related information
•Park Assist
* (p. 381)
Activating/deactivating Park Assist
The Park Assist Pilot function can be activated/ deactivated.
On/OffPark Assist's front and side sensors are automat- ically activated when the engine is started. Therear sensors are activated if the vehicle is movingbackward or reverse gear is engaged.
The function can be activated/deactivated in the center dis-play's Function view.
–Tap the Park Assist button in Function view.
> The Park Assist Pilot indicator light shows the status of the function: GREEN (on) or GRAY (off).
In vehicles equipped with Park Assist Camera,Park Assist can also be activated/deactivatedfrom the relevant camera view.
Related information
• Park Assist
* (p. 381)
Park Assist limitations
Park Assist may not be able to detect all condi- tions in all situations and functionality may there-fore be limited in certain cases.
The driver should be aware of the following limi- tations for Park Assist:
WARNING
Be extra cautious when reversing if this symbol isshown when a trailer, bikecarrier or similar is attachedand electrically connectedto the vehicle. The symbol indicates that
the rear parking assist sensors are deacti-
vated and will not warn of any obstacles.