2018 VOLVO XC90 TWIN ENGINE trailer

DRIVER SUPPORT
347
Rear Collision Warning
The Rear Collision Warning (
RCW) function can
help the driver avoid rear-end collisions from
vehicles 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 rapidly
flashing the turn signals.
If, at a speed below 30 km/h (20 mph), the RCW
function detects that the car is in danger of being
hit from behind, the seatbelt tensioners may ten-
sion the front seatbelts and activate the Whiplash
Protection System safety system.
Immediately before a collision from behind, RCW
may also activate the foot brake in order to
reduce the forward acceleration of the car during
the collision. However, the brakes will only be
applied if your vehicle is stationary. The brakes
will be immediately released if the accelerator
pedal 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 rear
changes 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 - the
RCW function will then be automatically
deactivated.
NOTE In certain markets RCW does not warn with
the direction indicators due to local traffic
regulations – in such cases, that part of the
function 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)

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* 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 system
from providing warnings.
• The BLIS function is automatically deacti-
vated if a trailer, bicycle holder or similar is
connected to the vehicle's electrical system.
• For BLIS to function optimally, bicycle hold-
ers, luggage racks or similar should not be
mounted 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 mod\
el.
82 Blind Spot Information
83 Note: This illustration is general and details may vary depending on mod\
el.

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. Message
Meaning
Blind spot sensor
Service required The system is not functioning as intended. Contact a workshop ‒ an authorized Volvo workshop is recommended.
Blind spot system off
Trailer attached BLIS 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 system
from providing warnings. For additional infor-
mation, see the section "Recommended
maintenance for Cross Traffic Alert".
• CTA is automatically deactivated if a trailer,
bicycle holder or similar is connected to the
vehicle's electrical system.
• For CTA to function optimally, bicycle hold-
ers, luggage racks or similar should not be
mounted on the vehicle's towbar.
Related information
•
Cross Traffic Alert* (p. 353) Recommended maintenance for
Cross 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 to
the 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 Volvo
workshop 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 mod\
el.
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. Message
Meaning
Blind spot sensor
Service required The system is not functioning as intended. Contact a workshop ‒ an authorized Volvo workshop is recommended.
Blind spot system off
Trailer attached BLIS 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

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* 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 the
section "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 become
aware 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 to
be used on major roads. The function is not
intended for use in city traffic.
DAC is activated when the vehicle's speed
exceeds 65 km/h (40 mph) and remains active
as 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 the
driver's movements of the steering wheel. If the driving behavior becomes
noticeably erratic, the driver will
be alerted by this symbol in the
instrument 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 be
alerted 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
382Park Assist front, rear and sides
Park Assist has different parameters depending
on which part of the vehicle is approaching an
obstacle.
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 is
engaged.
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 original
trailer cables – the Parking Assist system may
have to be turned off manually to prevent the
sensors from reacting to these.
Side sensors
Park Assist's side sensors are automatically acti-
vated when the engine is started. They are active
at 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 emitted
from 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
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* Option/accessory. 383
CAUTIONWhen 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. The
rear sensors are activated if the vehicle is moving
backward 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/deactivated
from 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 is
shown when a trailer, bike
carrier or similar is attached
and electrically connected
to the vehicle.
The symbol indicates that
the rear parking assist sensors are deacti-
vated and will not warn of any obstacles.