2017 VOLVO S90 ECO mode

||
DRIVER SUPPORT
262
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.
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

||
DRIVER SUPPORT
* Option/accessory.
264
Related information
• Starting and activating Adaptive Cruise Control (ACC)
* (p. 264)
• Changing Adaptive Cruise Control (ACC) speed (p. 267)
• Setting an Adaptive Cruise Control timeinterval (p. 267)
• Changing target vehicles and automaticbraking with Adaptive Cruise Control (ACC)(p. 269)
• Switching between Cruise Control and Adaptive Cruise Control
* (p. 258)
• Passing Assistance with Adaptive Cruise Control or Pilot Assist (p. 268)
• Deactivating/resuming Adaptive CruiseControl (ACC) (p. 265)
• Adaptive Cruise Control (ACC) - trouble-shooting (p. 271)
• Adaptive Cruise Control (ACC) symbols andmessages (p. 273)
• Pilot Assist
* (p. 275)
• Distance Alert
* (p. 259)
• Head-up display (HUD)
* (p. 116)
• Radar sensor limitations (p. 289)
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.
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.

DRIVER SUPPORT
}}
* Option/accessory.265
The
time interval to the vehi-
cle ahead will only be shown when 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. 261)
• Setting an Adaptive Cruise Control timeinterval (p. 267)
• Deactivating/resuming Adaptive CruiseControl (ACC) (p. 265)
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.
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.

||
DRIVER SUPPORT
* Option/accessory.
266
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. 261)
• Starting and activating Adaptive Cruise Control (ACC)
* (p. 264)
• Setting an Adaptive Cruise Control time interval (p. 267)
• Passing Assistance with Adaptive CruiseControl or Pilot Assist (p. 268)
• Adaptive Cruise Control (ACC) symbols andmessages (p. 273)
• Distance Alert
* (p. 259)

||
DRIVER SUPPORT
* Option/accessory.
268
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. 261)
• Starting and activating Adaptive Cruise Control (ACC)
* (p. 264)
• Deactivating/resuming Adaptive Cruise Control (ACC) (p. 265)
• Passing Assistance with Adaptive CruiseControl or Pilot Assist (p. 268)
• Adaptive Cruise Control (ACC) symbols andmessages (p. 273)
• Distance Alert
* (p. 259)
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.

||
DRIVER SUPPORT
* Option/accessory.
270
WARNING
At speeds above 20 mph (30 km/h), if ACC
changes targets from a moving vehicle to a stationary one, the system will not react to the
stationary vehicle and will accelerate to the previously set speed. The driver must actively apply the brakes to slow/stop the vehicle.
Automatic standby mode when changing targets
ACC disengages and goes into standby mode if:
• your vehicle's speed goes below approx. 3 mph (5 km/h) and ACC cannot determineif the target object is a stationary vehicle orsome other type of object such as a speedbump, 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.
Auto-hold brake functionIn slow-moving, stop-and-go traffic or when stop-ped at a traffic light, driving will resume automati-cally if the vehicle is not stopped for more thanapprox. 3 seconds. If it takes more than3 seconds for the vehicle ahead to begin movingagain, ACC will go into standby mode and theauto-hold brake function will activate.
–The driver will then have to reactivate ACC in one of the following ways:
• Press the
button on the left-side
steering wheel keypad.
• Press the accelerator pedal.
> ACC will resume following the vehicle ahead (target vehicle) if it begins to move within approx. 6 seconds.
NOTE
ACC can keep the vehicle at a standstill for up to 5 minutes, after which the parking brakewill be set and ACC will go into standbymode. The parking brake has to be released before ACC 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 ACC will gointo standby mode. This means that the brakes will be released and the vehicle can begin to roll. The driver must actively apply the brakes to keep the vehicle at a standstill. This can occur in the following situations: • the driver presses the brake pedal
• the parking brake is set •
the gear selector is moved to the
P, N or R
positions
• the driver puts ACC in standby mode.
Automatically setting the parking brakeIn certain situations, the parking brake is set automatically to help keep the vehicle at a stand-still. This occurs if ACC keeps the vehicle at a stand- still with the brakes and:
• the driver unbuckles the seat belt or opensthe door
• ACC has kept the vehicle at a standstill formore than approx. 5 minutes
• the brakes overheat
• the engine is turned off.
Related information
•
Adaptive Cruise Control (ACC)
* (p. 261)
• Auto-hold brake function (p. 348)
• Parking brake (p. 350)

||
DRIVER SUPPORT
* Option/accessory.
280
• the lane is at the top of a hill, on an uneven road surface or over a bump.
• bad weather conditions (rain, snow, fog,slush, poor visibility, backlighting, etc).
The driver should also be aware that Pilot Assist has the following limitations: • High curbs, barriers and temporary obsta- cles (cones, barriers etc) may not bedetected or could be detected incorrectlyas side marker lines, which may create arisk of collision. The driver must ensure asafe distance to these obstacles.
• The camera or radar sensor may not beable to detect objects if there are pot-holes or if there are stationary objectspartially or completely blocking the road.
• Pilot Assist does not "see" pedestrians,animals, etc.
• Pilot Assist's steering capacity is limitedand may not always be able to help thedriver keep the vehicle in the lane.
Hands on the steering wheel
Pilot Assist only functions when the driver's hands are on the steering wheel
, which is con-
tinuously monitored by the system. If this is notthe case, the driver will be alerted by a text mes-sage in the instrument panel. If the driver's handsare not returned to the steering wheel, an audiblesignal will sound. If the driver does not return his/her hands to thesteering wheel after the audible signal, PilotAssist will go into standby mode and must be reactivated by pressing
.
Related information
•
Pilot Assist
* (p. 275)
• Changing Pilot Assist speed (p. 280)
• Setting a Pilot Assist time interval (p. 281)
• Changing target vehicles and automatic braking with Pilot Assist (p. 284)
• Deactivating/resuming Pilot Assist (p. 282)
• Passing Assistance with Adaptive CruiseControl or Pilot Assist (p. 268)
• Pilot Assist limitations (p. 285)
• Pilot Assist symbols and messages (p. 287)
Changing Pilot Assist speed
Different speeds can be set for Pilot Assist.
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

||
DRIVER SUPPORT
* Option/accessory.
282
Time interval controls
Press to reduce the time interval to the vehi- cle ahead
Press to increase the time interval to the vehicle ahead
Distance indicator
In order to follow the vehicle ahead as smoothly as possible, Pilot Assist allows the time interval tovary considerably in certain situations. At lowspeeds, when the distance to the vehicle aheadis short, Pilot Assist increases the time intervalslightly.
• If Pilot Assist does not seem to react when itis put in active mode, this may be becausethe set time interval to the vehicle aheaddoes not allow an increase in speed.
• The higher the speed, the greater the dis-tance to the vehicle ahead for a given timeinterval.
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
•
Pilot Assist
* (p. 275)
• Starting and activating Pilot Assist (p. 278)
• Changing Pilot Assist speed (p. 280)
• Changing target vehicles and automaticbraking with Pilot Assist (p. 284)
• Deactivating/resuming Pilot Assist (p. 282)
• Passing Assistance with Adaptive CruiseControl or Pilot Assist (p. 268)
• Pilot Assist limitations (p. 285)
• Pilot Assist symbols and messages (p. 287)
Deactivating/resuming Pilot Assist Pilot Assist can be temporarily deactivated, put in standby mode and then reactivated.
Deactivating and putting Pilot Assist in standby mode
Function buttons and symbols (generic illustration)
–Press the button (2).
> Pilot Assist will go into standby mode (8). 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.
or
–Press the ◀ button (3).
> Pilot Assist will be turned off and shift to Adaptive Cruise Control in active mode.