2017 VOLVO XC90 T8 cruise control

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DRIVER SUPPORT
278vehicle set by the driver. If the radar sensor does not detect a vehicle ahead, ACC will insteadmaintain the speed set by the driver. ACC is designed to smoothly regulate speed. However, the driver must apply the brakes in sit-uations that require immediate braking such aswhen there are great differences in speedbetween vehicles, or if the vehicle ahead brakessuddenly. Due to limitations in the radar sensor,braking may occur unexpectedly or not at all. Adaptive Cruise Control can follow another vehi- cle from a standstill up to 125 mph (200 km/h).Always observe posted speed limits. The driver can also toggle between ACC and Cruise Control (CC) – see the article "Switchingbetween Cruise Control and Adaptive CruiseControl".
WARNING
•
It is advisable to read through all of the related articles pertaining to ACC (seethe list at the end of this article).
• Adaptive Cruise Control cannot cover alldriving situations and traffic, weather androad conditions.
• This system is designed to be a supple-mentary driving aid. It is not, however,intended to replace the driver's attentionand judgement. The driver is responsiblefor maintaining a safe distance and speedand must intervene if Adaptive CruiseControl does not maintain a suitablespeed or suitable distance to the vehicleahead.
• Maintenance of ACC components mayonly be performed by a trained and quali-fied Volvo technician.
OverviewThe distance to the vehicle ahead (in the samelane) is monitored by a radar sensor. Your vehi-cle's speed is regulated by accelerating andbraking. The brakes may emit a sound when theyare being modulated by the adaptive cruise con-trol system. This is normal.
WARNING
•
Adaptive Cruise Control is not a collision avoidance system. The driver is alwaysresponsible for applying the brakes if thesystem does not detect another vehicle.
• Adaptive Cruise Control does not react topeople or animals, or small vehicles suchas bicycles and motorcycles. It also doesnot react to slow moving, parked orapproaching vehicles, or stationaryobjects.
• Do not use Adaptive Cruise Control indemanding driving conditions such as citydriving or other heavy traffic situations, inslippery conditions, when there is a greatdeal of water or slush on the road, duringheavy rain or snow, in poor visibility, onwinding roads or on highway on- or off-ramps.

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Controls
Function buttons and symbols (generic illustration)
Increases the set speed or puts ACC back into active mode (previous settings will beresumed)
Puts ACC in active mode and stores the cur- rent speed or puts ACC in standby mode
Reduces the set speed
Increases the time interval/distance to the vehicle ahead
Reduces the time interval/distance to the vehicle ahead
Target vehicle indicator: ACC has detected and is following a target vehicle using the settime interval
Distance/time indicator
Instrument panel
Speed indicators
Set speed
Speed of the vehicle ahead
The current speed of your vehicle
See the article "Adaptive cruise control symbols and messages" for examples of different combi-nations of symbols, depending on the traffic sit-uation.
Collision warning
Warning light in the windshield
Adaptive Cruise Control can exert brake force that is equivalent to approximately 40% of thevehicle's total braking capacity. In situations requiring more brake force than ACC can provide and if the driver does not applythe brakes, an audible signal from the City Safetysystem will sound and warning light will illuminatein the windshield to alert the driver to react.
NOTE
Strong sunlight, reflections, extreme light con- trasts, the use of sunglasses, or if the driver isnot looking straight ahead may make the vis-ual warning signal in the windshield difficult tosee.

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WARNING
Adaptive Cruise Control only warns of vehicles detected by the radar sensor. In some casesthere may be no warning or the warning maybe delayed. The driver should always apply thebrakes when necessary.
Head-up-display *
A flashing light alerts the driver
A flashing icon will appear in the head-up display to alert the driver of a collision risk.
NOTE
Strong sunlight, reflections, extreme light con- trasts, the use of sunglasses, or if the driver isnot looking straight ahead may make the vis-ual warning signal in the windshield difficult tosee.
Related information
•Starting and activating Adaptive Cruise Control (ACC)
* (p. 280)
• Changing Adaptive Cruise Control (ACC) speed (p. 283)
• Setting an Adaptive Cruise Control timeinterval (p. 284)
• Changing target vehicles and automaticbraking with Adaptive Cruise Control (ACC)(p. 285)
• Switching between Cruise Control and Adaptive Cruise Control
* (p. 274)
• Passing Assistance with Adaptive Cruise Control or Pilot Assist (p. 285)
• Deactivating/resuming Adaptive CruiseControl (ACC) (p. 281)
• Adaptive Cruise Control (ACC) - trouble-shooting (p. 287)
• Adaptive Cruise Control (ACC) symbols andmessages (p. 289)
• Pilot Assist
* (p. 291)
• Distance Alert
* (p. 275)
• Head-up display (HUD)
* (p. 120)
• Radar sensor limitations (p. 305)
Starting and activating Adaptive Cruise Control (ACC)
*
ACC must first be put in active mode before it can be started in order to regulate speed or aset time interval to the vehicle ahead.
Starting ACC (putting it in standby
mode)
Function buttons and symbols
–Press ◀ (2) or ▶ (3) to scroll to the ACC
(
) function. The symbol (4) will be dis-
played in the instrument panel.
> The symbol indicates that ACC has been
started and is in standby mode . In
standby mode, the vehicle will not main-
tain a set speed or a time interval to the vehicle ahead.

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Activating ACC (putting it in active mode and setting a speed)
Before ACC can be put in active mode:
• The driver's seat belt must be buckled and the driver's door must be closed.
• There must be a vehicle ahead (a target vehi-cle) within a reasonable distance or yourvehicle's current speed must be at least9 mph (15 km/h).
–With the symbol displayed (ACC is in
standby mode), press the
button (1) on
the left-side steering wheel keypad.
> This puts ACC in active mode and sets the vehicle's current speed, which is indi- cated by digits in the center of the speed-ometer. The
time interval to the vehi-
cle ahead will only be shownwhen two vehicles are dis-played.
A speed interval will also be indicated:
• The higher speed is the one set in ACC
• The lower one is the speed of the vehicle ahead (the target vehicle).
Related information
•
Adaptive Cruise Control (ACC)
* (p. 277)
• Setting an Adaptive Cruise Control timeinterval (p. 284)
• Deactivating/resuming Adaptive CruiseControl (ACC) (p. 281)
Deactivating/resuming Adaptive Cruise Control (ACC)
ACC can be put temporarily in standby mode and then reactivated.
Function buttons and symbols
To temporarily deactivate and put Adaptive Cruise Control in standby mode:
–Press the button (2).
> The
symbol in the instrument panel
will change colors from WHITE to GRAY and the set speed in the center of thespeedometer will change from BEIGE toGRAY.

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WARNING
When ACC is in standby mode, the driver has to control the vehicle's speed and distance toa vehicle ahead. When ACC is in standby mode, the driver will be alerted if the distance to the vehicle aheadis too short by the Distance Alert function.See the article "Distance Alert" for additionalinformation.
Standby mode due to action by the driver
ACC is temporarily deactivated and put in standby mode if:
• the brakes are applied
• The gear selector is moved to
N
• the vehicle is driven faster than the setspeed for more than 1 minute.
In these cases, the driver will have to regulate thevehicle's speed. A temporary increase in speed, such as when passing another vehicle, does not affect the ACCset speed. The vehicle will return to the set speedwhen the accelerator pedal is released.
Automatic standby mode
ACC interacts with other systems, such as Electronic Stability Control. If any of these othersystems are not functioning properly, ACC willturn off automatically.
WARNING
If this happens, the driver will be alerted by an audible signal and a message in the instru-ment panel. The driver will have to adapt thevehicle's speed, apply the brakes when nec-essary and keep a safe distance to the vehicleahead.
ACC switches automatically to standby mode if: • the vehicle's speed goes below approx. 3 mph (5 km/h) and ACC cannot determineif the vehicle ahead is stationary or is anobject such as a speed bump, etc
• the vehicle's speed goes below approx.3 mph (5 km/h) and the vehicle aheadchanges lanes or turns so that ACC nolonger has a target vehicle to follow
• the driver opens the door
• the driver unbuckles the seat belt
• the engine speed (rpm) is too high/low
• the wheels lose traction
• the brake temperature is too high
• the parking brake is applied
• the stability system's
ESC Sport Mode is
activated
• the
Off Road drive mode is selected
• The radar sensor is covered by e.g., wet snow or if heavy rain interferes with radar waves
Reactivating ACC from standby mode
Generic illustration
To reactivate ACC after it has temporarily been put in standby mode:
–Press the button (1).
> The vehicle will then return to the most
recently set speed .
WARNING
There may be a significant increase in speed after the
button has been pressed.
Related information
•Adaptive Cruise Control (ACC)
* (p. 277)
• Starting and activating Adaptive Cruise Control (ACC)
* (p. 280)
• Setting an Adaptive Cruise Control time interval (p. 284)

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* Option/accessory.283
•
Passing Assistance with Adaptive Cruise Control or Pilot Assist (p. 285)
• Adaptive Cruise Control (ACC) symbols andmessages (p. 289)
• Distance Alert
* (p. 275)
Changing Adaptive Cruise Control (ACC) speed
ACC makes it possible to set various speeds.
Changing a set speed
Function buttons and symbols
–Change a set speed by pressing the (1)
or — (3) buttons briefly or by pressing and
holding them:
• Press briefly
: changes speed in
+/– 5 mph (+/– 5 km/h) increments. Each press changes the vehicle's speedby +/– 5 mph (+/– 5 km/h).
• Press and hold
: changes the speed
+/– 1 mph (+/– 1 km/h) at a time.Release the button when the set speedindicator (4) has moved to the desiredspeed. If speed is increased by pressing the accelerator pedal before the
button is pressed, the vehi-
cle's speed when the button is pressed will become the set speed assuming that the accel-erator pedal is still depressed when the button ispressed. A temporary increase in speed, such as when passing another vehicle, does not affect the ACCset speed. The vehicle will return to the set speedwhen the accelerator pedal is released. The Adaptive Cruise Control can follow another vehicle from a standstill up to 125 mph(200 km/h). Always observe posted speed limits. The lowest speed that can be set for ACC is
20 mph (30 km/h). However, ACC can monitor and react to the speed of the vehicle ahead downto a standstill. The highest speed that can be set/stored is approx. 125 mph (200 km/h). Always observeposted speed limits.
Related information
• Adaptive Cruise Control (ACC)
* (p. 277)

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Setting an Adaptive Cruise Control time interval
ACC makes it possible to set various time inter- vals to the vehicle ahead.
Different time intervals to the vehicle ahead can be selectedand are shown in the instru-ment panel as 1–5 horizontalbars. The greater the number ofbars, the longer the time inter-val. One bar between the vehi-
cles represents a time interval of approximately1 second; 5 bars is approximately 3 seconds. The same symbol appears if Distance Alert is activated.
• If the symbol shows two vehicle's, ACC is actively following the vehicle ahead (a targetvehicle).
• If only one vehicle is displayed, ACC is
not
actively following another vehicle.
Changing a time interval
Controls for setting a time interval
Reduce the time interval
Increase the time interval
Distance/time indicator
–Press buttons (1) or (2) to reduce or increase the time interval.
> The distance/time indicator (3) shows the current time interval.
In order to follow the vehicle ahead as smoothly as possible, ACC allows the time interval to varyconsiderably in certain situations. At low speeds,when the distance to the vehicle ahead is short,ACC increases the time interval slightly. • If ACC does not seem to react when it is put in active mode, this may be because the set time interval to the vehicle ahead does notallow an increase in speed.
• The higher the speed, the greater the dis-tance to the vehicle ahead for a given timeinterval.
• Only use time intervals permitted by localtraffic regulations.
WARNING
•
Only use a time interval that is suitable in current traffic conditions.
• A short time interval gives the driver lim-ited reaction time if an unexpected situa-tion occurs in traffic.
Related information
•
Adaptive Cruise Control (ACC)
* (p. 277)
• Starting and activating Adaptive Cruise Control (ACC)
* (p. 280)
• Deactivating/resuming Adaptive Cruise Control (ACC) (p. 281)
• Passing Assistance with Adaptive CruiseControl or Pilot Assist (p. 285)
• Adaptive Cruise Control (ACC) symbols andmessages (p. 289)
• Distance Alert
* (p. 275)

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Passing Assistance with Adaptive Cruise Control or Pilot Assist
ACC or Pilot Assist can assist the driver when passing other vehicles.
How passing assistance worksWhen ACC or Pilot Assist is following another vehicle and the driver indicates that he/she isabout to pass that vehicle by using the left turnsignal, ACC or Pilot Assist will begin acceleratingtoward the vehicle ahead before your vehicle hasmoved into the passing lane. The function will then delay a speed reduction to avoid early braking as your vehicle approachesthe slower-moving vehicle. The function is active until your vehicle has passed the other vehicle.
WARNING
Be aware that this function may be activated in situations other than when passing a vehi-cle, such as if the turn signal is used to indi-cate a lane change or to indicate a turn. Thevehicle will accelerate briefly.
Using passing assistanceTo activate passing assistance:
• Your vehicle (ACC or Pilot Assist) must be following another vehicle (the target vehicle).
• Current speed must be at least approx.45 mph (70 km/h ). •
The speed set for ACC or Pilot Assist mustbe high enough to safely pass the vehicleahead.
Starting passing assistanceTo start a passing assistance sequence:
• Activate the left turn signal.
Passing assistance limitations
WARNING
The driver should be prepared for sudden changes when passing assistance is used. Incertain cases, there may be undesired accel-eration. Certain situations should be avoided, such as: • If the vehicle is approaching an exit to the left or a left turn.
• If the vehicle ahead slows down beforeyour vehicle has moved into the passinglane.
• Traffic in the passing lane slows down.
Passing assistance in these situations can bedeactivated by putting ACC or Pilot Assist instandby mode.
Related information
• Pilot Assist
* (p. 291)
• Adaptive Cruise Control (ACC)
* (p. 277)
Changing target vehicles and automatic braking with AdaptiveCruise Control (ACC)
At certain speeds, Adaptive Cruise Control can change target vehicles and automatically applythe brakes.
Changing target vehicles
If the target vehicle turns suddenly, there may be a sta- tionary vehicle ahead
When ACC is actively following another vehicle at speeds under 20 mph (30 km/h) and changes
targets from a moving vehicle to a stationary one, the system will brake for the stationary vehicle.