2018 VOLVO XC90 TWIN ENGINE brake

DRIVER SUPPORT
* Option/accessory.
298 •
Managing Adaptive Cruise Control speed
(p. 300)
• Setting Adaptive Cruise Control time inter-
vals (p. 301)
• Deactivating/reactivating Adaptive Cruise
Control (p. 302)
• Passing assistance with Adaptive Cruise
Control (p. 304)
• Starting passing assistance with Adaptive
Cruise Control (p. 304)
• Limitations of passing assistance with Adap-
tive Cruise Control (p. 305)
• Switching target vehicles with Adaptive
Cruise Control (p. 305)
• Automatic braking with Adaptive Cruise Con-
trol (p. 306)
• Adaptive Cruise Control limitations (p. 307)
• Switching between Cruise Control and Adap-
tive Cruise Control (p. 307)
• Symbols and messages for Adaptive Cruise
Control (p. 309) Adaptive Cruise Control and
collision warning Collision warning light on the windshield
43
.
Adaptive Cruise Control utilizes approx. 40% of
the vehicle's braking capacity. If a situation
requires more braking force than the Adaptive
Cruise Control can provide, and if the driver does
not apply the brakes, a warning light and audible
warning signal will be activated to alert the driver
that immediate action is required.
NOTE Visual warnings on the windshield may be dif-
ficult to notice in cases of strong sunlight,
reflections, extreme light contrasts, or if the
driver is wearing sunglasses or is not looking
straight ahead.
WARNING Adaptive Cruise Control only issues a warning
for vehicles detected by its radar unit – thus, a
warning may come after a delay or not at all.
• Never wait for a warning. Apply the
brakes when necessary.
Related information
•
Adaptive Cruise Control* (p. 295) 43
Note: This illustration is general and details may vary depending on mod\
el.

DRIVER SUPPORT
}}
303
To temporarily deactivate Adaptive Cruise Control
and put it in standby mode:
– Press the button on the steering wheel
(2).
> The symbol in the instrument panel
changes color from WHITE to GRAY and
the set speed in the center of the speed-
ometer will change from BEIGE to GRAY.
WARNING •
If Adaptive Cruise Control is in standby
mode, the driver must intervene and regu-
late both speed and distance to the vehicle
ahead.
• If the vehicle comes too close to a vehicle
ahead when Adaptive Cruise Control is in
standby mode, the driver is instead warned
of the short distance by the Distance Alert
function.
Standby mode due to action by the driver
Adaptive Cruise Control will be temporarily deac-
tivated and put in standby mode if:
• the brakes are applied.
• the gear selector is moved to N
• the vehicle is driven faster than the set
speed for more than 1 minute Temporarily increasing speed using the accelera-
tor pedal, e.g. when passing another vehicle, will
not affect the setting. The vehicle will return to
the set speed when the accelerator pedal is
released.
Automatic standby mode
Adaptive Cruise Control is dependent on other
systems, such as Electronic Stability Control
(ESC 50
). If any of these other systems stops
working, Adaptive Cruise Control will automati-
cally switch off.
WARNING With automatic standby mode, the driver is
warned by an acoustic signal and a message
on the instrument panel.
•
The driver must then regulate vehicle
speed, apply the brakes if necessary, and
maintain a safe distance to other vehicles.
Adaptive Cruise Control may go into standby
mode if: • your vehicle's speed goes below 5 km/h
(3 mph) and ACC cannot determine if the
vehicle ahead is stationary or if it is another
object, e.g. a speed bump.
• your vehicle's speed goes under 5 km/h
(3 mph) and the vehicle ahead turns so that
ACC no longer has a vehicle to follow. •
the driver opens the door.
• the driver unbuckles the seat belt.
• the engine speed (rpm) is too low/high.
• one or more of the wheels lose traction.
• the brake temperature is high.
• the parking brake is applied.
• the camera/radar sensor is covered by snow
or heavy rain (the camera lens/radar waves
are blocked)
Reactivating Adaptive Cruise Control
from standby mode Note: This illustration is general and details may vary
depending on model.
50
Electronic Stability Control

DRIVER SUPPORT
* Option/accessory.305
Limitations of passing assistance
with Adaptive Cruise Control
Passing assistance functionality may be reduced
in certain situations.
WARNING The driver should be aware that if conditions
suddenly change when using Parking Assis-
tance, the function may implement an unde-
sired acceleration in certain conditions.
Some situations should be avoided, e.g. if:
•
the vehicle is approaching an exit in the
same direction as passing would normally
occur
• the vehicle ahead slows before your vehi-
cle has had time to switch to the passing
lane
• traffic in the passing lane slows down
• a vehicle for right-hand traffic is driven in
a country with left-hand traffic (or vice
versa).
Situations of this type can be avoided by tempo-
rarily putting ACC 53
in standby mode.
Related information
• Adaptive Cruise Control* (p. 295) Switching target vehicles with
Adaptive Cruise Control
At certain speeds, models with automatic trans-
missions and Adaptive Cruise Control (ACC 54
)
can switch target vehicles.
Switching target vehicles If the target vehicle ahead turns suddenly, there may be
stationary traffic ahead.
When Adaptive Cruise Control is actively follow-
ing another vehicle at speeds under 30 km/h
(20 mph) and switches targets from a moving
vehicle to a stationary vehicle, Adaptive Cruise
Control will brake for the stationary vehicle.
WARNING When Adaptive Cruise Control follows another
vehicle at speeds over approx. 30 km/h
(20 mph) and changes target vehicle – from a
moving vehicle to a stationary one – Adaptive
Cruise Control will ignore the stationary vehi-
cle and instead accelerate to the stored
speed.
•
The driver must then intervene and apply
the brakes.
Automatic standby mode when switching
targets
Adaptive Cruise Control will be disabled and go
into standby mode:
• if your vehicle's speed goes below 5 km/h
(3 mph) and Adaptive Cruise Control cannot
determine if the target object is a stationary
vehicle or another object, e.g. a speed bump.
• if your vehicle's speed goes under 5 km/h
(3 mph) and the vehicle ahead turns so that
Adaptive Cruise Control no longer has a vehi-
cle to follow.
Related information
•
Adaptive Cruise Control* (p. 295) 53
Adaptive Cruise Control
54 Adaptive Cruise Control

DRIVER SUPPORT
* Option/accessory.
306 Automatic braking with Adaptive
Cruise Control
The Adaptive cruise control (ACC
55
) has a spe-
cial brake function in slow traffic and while sta-
tionary.
Braking function in slow traffic and at a
standstill
In slow-moving, stop-and-go traffic or when stop-
ped at a traffic light, driving will resume automati-
cally if the vehicle is stopped for less than
approx. 3 seconds. If it takes more than 3 sec-
onds for the vehicle ahead to begin moving again,
Adaptive Cruise Control will go into standby
mode and the Auto-hold brake function will acti-
vate.
– Adaptive Cruise Control can be reactivated in
one of the following ways:
• Pressing the button on the steering
wheel keypad.
• Pressing the accelerator pedal.
>

Adaptive Cruise Control will resume fol-
lowing the vehicle ahead if it begins to
move within approx. 6 seconds.
NOTE ACC can keep the vehicle stationary for no
more than 5 minutes – after that time the
parking brake is applied and Adaptive Cruise
Control is deactivated.
The parking brake must be released before
Adaptive Cruise Control can be reactivated.
Deactivation of the Auto-hold brake function
In certain situations, Auto-hold will be deactivated
when the vehicle is at a standstill and Adaptive
Cruise Control will go into standby mode. This
means that the brakes will be released and the
vehicle could begin to roll. The driver must
actively apply the brakes to keep the vehicle sta-
tionary.
This can occur if:
• the driver depresses the brake pedal
• the parking brake is applied
• the gear selector is moved to the
P
, N
or R
positions
• the driver puts Adaptive Cruise Control in
standby mode.
Auto Activate Parking BrakeIn certain situations, the parking brake will be
applied to keep the vehicle at a standstill. This occurs if Adaptive Cruise Control is keeping
the vehicle stationary using the brakes and:
• the driver opens the door or unbuckles
his/her seat belt
• ACC has kept the vehicle at a standstill for
more than approx. 5 minutes
• the brakes overheat
• the driver switches off the engine manually.
Related information
•
Adaptive Cruise Control* (p. 295) 55
Adaptive Cruise Control

DRIVER SUPPORT
}}
* Option/accessory. 307
Adaptive Cruise Control limitations
Adaptive Cruise Control (ACC 56
) may have lim-
ited functionality in certain situations.
Steep roads and/or heavy loadsAdaptive Cruise Control is primarily intended to
be driven on flat roads. The function may not be
able to maintain the correct time interval to the
vehicle ahead when driving down steep hills. The
driver should be extra attentive and prepared to
apply the brakes.
• Do not use Adaptive Cruise Control if the
vehicle is carrying a heavy load or towing a
trailer.
Other limitations
•
The
Off Road drive mode cannot be
selected if Adaptive Cruise Control is acti-
vated.
NOTE The function uses the vehicle's camera unit,
which has some general limitations – see the
section "Camera unit limitations".
NOTE
The function uses the vehicle's radar unit,
which has some general limitations – see the
section "Radar unit limitations".
Related information
•
Adaptive Cruise Control* (p. 295) Switching between Cruise Control
and Adaptive Cruise Control
In vehicles equipped with Adaptive Cruise Con-
trol (ACC 57
), the driver can switch between
Cruise Control (CC 58
) and ACC.
A symbol in the instrument panel indicates which
cruise control system is active CC
ACC A A
Cruise control

Adaptive Cruise Control A
WHITE symbol: The function is active. GRAY symbol: Standby
mode
Switching from ACC to CCTo do so:
1. Press the button on the steering wheel
keypad to put Adaptive Cruise Control in
standby mode. 56
Adaptive Cruise Control

||DRIVER SUPPORT
* Option/accessory.
308 2.
Tap the Cruise Control button in the center
display's Function view. The button's indica-
tor will change from GRAY to GREEN.
>

The symbol in the instrument panel will
change from ACC to
CC, indicating that Adaptive Cruise Con-
trol is off and Cruise Control is in standby
mode.
3. Pressing the button on the steering
wheel keypad.
>

Cruise Control will start and the vehicle's
current speed will be set.
WARNING Switching from ACC to CC means that the
vehicle:
• will no longer maintain a preset time
interval to the vehicle ahead.
• will only follow the stored speed and the
driver must therefore apply the brakes
when necessary.
If CC is active when the engine is turned off, ACC
will be automatically activated the next time the
engine is started.
Switching from CC to ACCTo do so:
1. Press the button on the steering wheel
keypad to put Cruise Control in standby
mode.
2. Tap the Cruise Control button in Function
view. The button's indicator will change from
GREEN to GRAY.
>

The symbols in the instrument panel will
switch from CC to ACC
to indicate that Adaptive Cruise Control is
in standby mode.
3. Pressing the button on the steering
wheel keypad.
>

Adaptive Cruise Control will go into active
mode and set the vehicle's current speed
and the selected time interval to the vehi-
cle ahead.
Related information
• Adaptive Cruise Control* (p. 295) 57
Adaptive Cruise Control
58 Cruise Control

||DRIVER SUPPORT
312
WARNING
•
The Pilot Assist function is supplementary
driver support intended to facilitate driv-
ing and help make it safer – it cannot
handle all situations in all traffic, weather
and road conditions.
• The driver is advised to read all sections
in the Owner's Manual about this function
to learn of its limitations, which the driver
must be aware of before using the func-
tion (see the link list at the end of this
article).
• Pilot Assist should only be used if there
are clear lane lines painted on each side
of the lane. All other use will increase the
risk of contact with nearby obstacles that
cannot be detected by the functions.
• Pilot Assist is not a substitute for the driv-
er's attention and judgment. The driver is
always responsible for ensuring the vehi-
cle is driven in a safe manner, at the
proper position within the lane, at the
appropriate speed, with an appropriate
distance to other vehicles, and in accord-
ance with current traffic rules and regula-
tions.NOTE Depending on market, this function may be
either Standard or Optional.
Pilot Assist regulates speed by accelerating and
braking. It is normal for the brakes to emit a slight
sound when they are being used to adjust speed.
Pilot Assist attempts to smoothly regulate speed.
The driver must apply the brakes in situations
requiring immediate braking. For example, when
there are great differences in speed between
vehicles or if the vehicle ahead brakes suddenly.
Due to limitations in the camera and radar sen-
sor, braking may occur unexpectedly or not at all.
Pilot Assist is designed to follow a vehicle ahead
in the same lane and maintain a time interval to
that vehicle set by the driver. If the radar sensor
does not detect a vehicle ahead, it will instead
maintain the speed set by the driver. This will also
happen if the speed of the vehicle ahead
exceeds the set speed for your vehicle.
• Pilot Assist can follow another vehicle at
speeds from a standstill up to 200 km/h
(125 mph).
• Pilot Assist can provide steering assistance
from near-stationary speeds up to 140 km/h
(87 mph).WARNING •
Pilot Assist is not a collision avoidance
system. The driver must intervene if the
system fails to detect a vehicle ahead.
• Pilot Assist does not brake for people,
animals, objects, small vehicles (e.g.
cycles and motorcycles), low trailers as
well as oncoming, slow or stationary vehi-
cles.
• Do not use Pilot Assist in demanding sit-
uations, such as in city traffic, at intersec-
tions, on slippery surfaces, with a lot of
water or slush on the road, in heavy rain/
snow, in poor visibility, on winding roads,
on highway on- or off-ramps, or with a
trailer connected to the vehicle.
CAUTION Maintenance of the integrated components in
Pilot Assist may only be performed by a work-
shop – an authorized Volvo workshop is rec-
ommended.
In curves and forks in the roadPilot Assist is designed to interact with the driver.
The driver should never wait for steering assis-
tance from Pilot Assist, but instead should always
be ready to increase his or her own steering
efforts, particularly in curves.

||DRIVER SUPPORT
* Option/accessory.
314
Instrument panel Speed indicators
62
. Set speed
Speed of the vehicle ahead
The current speed of your vehicle
See "Pilot Assist symbols and messages" for
examples of different combinations of symbols
depending on the traffic situation.
Related information
• Pilot Assist and collision warning (p. 314)
• Head-up display for Pilot Assist during colli-
sion risks (p. 315)
• Activating and starting Pilot Assist (p. 315)
• Managing Pilot Assist speed (p. 316) •
Setting a time interval for Pilot Assist
(p. 317)
• Deactivating/reactivating Pilot Assist
(p. 319)
• Passing assistance with Pilot Assist (p. 321)
• Starting passing assistance with Pilot Assist
(p. 321)
• Passing assistance with Pilot Assist limita-
tions (p. 321)
• Switching target vehicles with Pilot Assist
(p. 322)
• Automatic braking with Pilot Assist (p. 322)
• Pilot Assist limitations (p. 323)
• Pilot Assist* symbols and messages (p. 324) Pilot Assist and collision warning
Collision warning Collision warning light on the windshield
63
.
Pilot Assist uses approx. 40% of the vehicle's
braking capacity. If a situation requires more
braking force than Pilot Assist can provide, and if
the driver does not apply the brakes, a warning
light and audible warning signal will be activated
to alert the driver that immediate action is
required. 62
Note: This illustration is general and details may vary depending on mod\
el.
63 The illustration is generic - details may vary according to vehicle mode\
l.