2018 VOLVO XC90 cruise control

DRIVER SUPPORT
* Option/accessory.303
Limitations of passing assistancewith 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 normallyoccur
• the vehicle ahead slows before your vehi-cle has had time to switch to the passinglane
• traffic in the passing lane slows down
• a vehicle for right-hand traffic is driven ina country with left-hand traffic (or viceversa).
Situations of this type can be avoided by tempo- rarily putting ACC 53
in standby mode.
Related information
• Adaptive Cruise Control
* (p. 293)
Switching target vehicles withAdaptive 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 CruiseControl 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 cannotdetermine if the target object is a stationaryvehicle 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 thatAdaptive Cruise Control no longer has a vehi-cle to follow.
Related information
•
Adaptive Cruise Control
* (p. 293)
53
Adaptive Cruise Control
54 Adaptive Cruise Control

DRIVER SUPPORT
* Option/accessory.
304
Automatic braking with AdaptiveCruise 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 thanapprox. 3 seconds. If it takes more than 3 sec-onds for the vehicle ahead to begin moving again,Adaptive Cruise Control will go into standbymode 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 theparking brake is applied and Adaptive CruiseControl 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 AdaptiveCruise Control will go into standby mode. Thismeans that the brakes will be released and thevehicle could begin to roll. The driver mustactively 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 beapplied to keep the vehicle at a standstill. This occurs if Adaptive Cruise Control is keepingthe vehicle stationary using the brakes and:
• the driver opens the door or unbuckleshis/her seat belt
• ACC has kept the vehicle at a standstill formore than approx. 5 minutes
• the brakes overheat
• the driver switches off the engine manually.
Related information
•
Adaptive Cruise Control
* (p. 293)
55
Adaptive Cruise Control

DRIVER SUPPORT
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* Option/accessory.305
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 beable to maintain the correct time interval to thevehicle ahead when driving down steep hills. Thedriver should be extra attentive and prepared toapply the brakes.
• Do not use Adaptive Cruise Control if thevehicle is carrying a heavy load or towing atrailer.
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 thesection "Camera unit limitations".
NOTE
The function uses the vehicle's radar unit, which has some general limitations – see thesection "Radar unit limitations".
Related information
• Adaptive Cruise Control
* (p. 293)
Switching between Cruise Controland 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
CCACC
AA
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

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DRIVER SUPPORT
* Option/accessory.
306 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 standbymode.
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 thedriver must therefore apply the brakeswhen necessary.
If CC is active when the engine is turned off, ACC
will be automatically activated the next time theengine 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. 293)
57
Adaptive Cruise Control
58 Cruise Control

DRIVER SUPPORT
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* Option/accessory.307
Symbols and messages forAdaptive Cruise Control
A number of symbols and messages relating to Adaptive Cruise Control (ACC 59
) may be dis-
played in the instrument panel and/or the head- up display *.
Several examples 60
are provided below.
The previous illustration 61
shows that Adaptive
Cruise Control is set to maintain a speed of 110 km/h (68 mph) and that there is no targetvehicle ahead to follow.
The previous illustration 61
shows that Adaptive
Cruise Control is set to maintain a speed of 110 km/h (68 mph) and is following a target vehicle ahead, which is traveling at the samespeed.
59
Adaptive Cruise Control
60 In the following illustration, Road Sign Information (RSI) indicates that the maximum permitted speed is 130 km/h (80 mph).
61 Note: This illustration is general and details may vary depending on model.

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DRIVER SUPPORT
* Option/accessory.
308
SymbolMessageMeaning
The symbol is WHITE. The vehicle is maintaining the set speed.
Adaptive cruise Unavailable
The symbol is GRAY. Adaptive Cruise Control is in standby mode.
Adaptive cruise Service required
The symbol is GRAY.
The system is not functioning as intended. Contact a workshop
‒ an authorized Volvo workshop is
recommended.
Windscreen sensor Sensor blocked, see Owner's manualClean the windshield in front of the camera and radar sensors.
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
• Adaptive Cruise Control
* (p. 293)

DRIVER SUPPORT
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311
When the vehicle is approaching an off-ramp or a fork in the road, the driver should steer towardthe desired lane to indicate to Pilot Assist thedesired direction of travel.
Pilot Assist strives to keep the vehicle
in the center of the lane
When Pilot Assist provides steering assistance, itstrives to position the vehicle in the center of thelane between the lane markings. For the smooth-est driving experience possible, the driver shouldpermit the vehicle to find the optimal positioning.The driver should check that the vehicle is posi-tioned safely in the lane and can always adjustthe vehicle's position by applying more force tothe steering wheel. If Pilot Assist does not position the vehicle appro- priately in the lane, the driver should turn off PilotAssist or switch to Adaptive Cruise Control.
Overview
Controls
Function buttons and symbols 62
.
: Activates Pilot Assist from standby
mode and resumes the set speed and time interval
: Increases the set speed
: From standby mode - activates Pilot
Assist and sets the current speed
: From active mode - deactivates/puts
Pilot Assist in standby mode
◀ : Switches from Pilot Assist to Adaptive
Cruise Control
: Reduces the set speed
Increases the time interval to the vehicle ahead
▶ : Switches from Adaptive Cruise Control to
Pilot Assist
Reduces the time interval to the vehicle ahead
Function symbol
Symbols for target vehicle and distance to the vehicle ahead
Symbol for activated/deactivated steering assistance
62 Note: This illustration is general and details may vary depending on model.

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DRIVER SUPPORT
314With Adaptive Cruise Control in
standby mode:
1. Press the
▶ button on the steering wheel (6).
> The
symbol will change to Pilot
Assist in standby mode (8).
2. Press the
button on the steering wheel
(2).
> Pilot Assist will start and the current speed will be stored, which will be shown by numbers in the center of the speedom-eter.
...or... With Adaptive Cruise Control started:
–Press the ▶ button on the steering wheel (6).
> Pilot Assist will start.
Pilot Assist's steering assis- tance is only active when thesteering wheel symbol (2)changes from GRAY toGREEN. Pilot Assist will only regulate
the time interval to the vehicle ahead when the distance symbol shows a vehicle (1) over thesteering wheel symbol.
A speed interval will be marked at the same time. The higher speed is the set speed for your vehicle and thelower speed is the speed of thevehicle ahead (target vehicle).
Hands on the steering wheelPilot Assist only functions if the driver's hands are on the steering wheel. If Pilot Assist detectsthat the driver's hands are not on the steeringwheel, the driver will be instructed to activelysteer the vehicle by a text message and an audi-ble signal. If Pilot Assist still cannot detect the driver's hands on the steering wheel, the function will gointo standby mode. Pilot Assist must then be reactivated by pressing the
button on the
steering wheel.
NOTE
Note that the Pilot Assist function only works when the driver's hands are on the steeringwheel.
Related information
• Pilot Assist (p. 309)
Managing Pilot Assist speed Pilot Assist can be set to various speeds.
Setting/changing set speed
Note: This illustration is general and details may vary depending on model and market.
: Increases the set speed
: Reduces the set speed
Set speed