2019 VOLVO S90 TWIN ENGINE cruise control

DRIVER SUPPORT
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Switching off Cruise Control
Cruise control (Cruise Control - CC) can beturned off.
Function buttons and symbols25.
To turn off Cruise Control:
1.Press the button on the steering wheel(2).
> Cruise Control will go into standby mode.
2.Press the ◀ (1) or ▶ (3) buttons on thesteering wheel to select another function.
>The Cruise Control symbol (4) inthe instrument panel will go out and theset speed will be erased.
3.Press the (2) button on the steeringwheel keypad again.
> Another function will be activated.

NOTE
In vehicles equipped with Adaptive CruiseControl*, it is possible to switch betweencruise control and Adaptive Cruise Control –see the heading "Switching between CC andACC".

Related information
Cruise control (p. 283)
Switching between Cruise Control and Adap-tive Cruise Control (p. 305)
Distance Alert*26
The Distance Alert27 function can help the driverbecome aware if the time interval to the vehiclein front is too short.
However, the vehicle must be equipped with ahead-up display in order to display the DistanceAlert, which will then be indicated by a symbolon the windshield as long as the time interval tothe vehicle ahead is shorter than the set timeinterval.
Distance Alert is active at speeds above 30 km/h(20 mph) and only reacts for vehicles ahead mov-ing in the same direction as your vehicle. No dis-tance information is provided for oncoming, slow-moving or stationary vehicles.

NOTE
Distance Alert is only available in vehiclesthat can display information on the wind-shield with a head-up display.
Distance Alert is deactivated while Adap-tive Cruise Control or Pilot Assist isactive.
25Note: This illustration is general and details may vary depending on model.26The Distance Alert function is only available in vehicles that can display information on the windshield with a head-up display.27Distance Alert

DRIVER SUPPORT
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Activating/deactivating Distance
Alert30
Distance Alert can be turned off.

On/Off
Press the Distance Alert but-ton in the center display'sFunction view.
GREEN button indicator light - Distance Alertis on.
GRAY button indicator light - Distance Alertis off.
Distance Alert is automatically activated eachtime the engine is started.

Related information
Distance Alert* (p. 288)
Setting a time interval for Distance
Alert31
The Distance Alert function can be set to differ-ent time intervals.
Different time intervals to thevehicle ahead can be selectedand are shown in the instru-ment panel as 1–5 horizontalbars. The more bars, the longerthe time interval. One bar rep-resents an interval ofapprox. 1 second to the vehicle ahead. 5 barsrepresents approx. 3 seconds.
The same symbol appears when the AdaptiveCruise Control function is activated.
Controls for setting a time interval.
Reduce the time interval
Increase the time interval
Distance indicator
–Press the (1) or (2) button to decrease orincrease the time interval.
> The distance indicator (3) shows the cur-rent time interval.
30The Distance Alert function is only available in vehicles that can display information on the windshield with a head-up display.31The Distance Alert function is only available in vehicles that can display information on the windshield with a head-up display.

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NOTE
The greater the vehicles' speed, thegreater the distance between them for aset time interval.
Only use the time intervals permitted bylocal traffic regulations.
The set time interval is also used by theAdaptive Cruise Control and Pilot Assistfunctions.

WARNING
Only use a time interval suitable for thecurrent traffic conditions.
The driver should be aware that shorttime intervals give them limited time toreact and act to any unforeseen trafficsituation.

Related information
Distance Alert* (p. 288)
Distance Alert limitations32
Distance Alert functionality may be reduced incertain situations.
WARNING
The radar sensor has a limited field ofvision. In some situations, it may detect avehicle later than expected or not detectother vehicles at all.
The radar sensor cannot cover all drivingsituations and traffic, weather and roadconditions.
The driver is responsible for maintaining asafe distance and speed and must inter-vene if the various driver support systemsdo not maintain a suitable speed or suita-ble distance to the vehicle ahead.
Maintenance of radar sensor componentsmay only be performed by a trained andqualified Volvo technician.
Strong sunlight, reflections from the roadsurface, strong lighting contrasts or usingsunglasses may make the warning light inthe windshield difficult to see. Poorweather or winding roads can affect theradar sensor's capacity to detect vehiclesahead.
A vehicle's size (e.g., a motorcycle) canalso affect the radar sensor's capacity todetect another vehicle. This may result inthe warning light illuminating at a shorter
32The Distance Alert function is only available in vehicles that can display information on the windshield with a head-up display.

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distance than the one that has been setor not illuminating at all.
High speeds may also result in the warn-ing light illuminating at a shorter distancethan the one that has been set due tolimitations in the radar sensor's range.

NOTE
The function uses the vehicle's radar unit,which has some general limitations – see thesection "Radar unit limitations".

Related information
Distance Alert* (p. 288)
Radar sensor limitations (p. 325)
Adaptive Cruise Control*
Adaptive Cruise Control (ACC33) helps thedriver maintain a constant speed with a set timeinterval to the vehicle ahead.
Adaptive Cruise Control helps provide a morerelaxed driving experience on long trips on high-ways or long, straight roads with even trafficflows.
The camera/radar sensor measures the distance to thevehicle ahead34.
The driver sets a speed and a time interval to thevehicle ahead. If the camera/radar sensor detectsa slower-moving vehicle ahead, your vehicle'sspeed will be automatically adapted according tothe set time interval to that vehicle. When there
are no longer slower-moving vehicles ahead, thevehicle will return to the set speed.
WARNING
The Adaptive Cruise Control function issupplementary driver support intended tofacilitate driving and help make it safer –it cannot handle all situations in all traffic,weather and road conditions.
The driver is advised to read all sectionsin the Owner's Manual about this functionto learn of its limitations, which the drivermust be aware of before using the func-tion (see the link list at the end of thisarticle).
Adaptive Cruise Control is not a substi-tute for the driver's attention and judg-ment. The driver is always responsible forensuring the vehicle is driven in a safemanner, at the appropriate speed, with anappropriate distance to other vehicles,and in accordance with current trafficrules and regulations.

NOTE
Depending on market, this function may beeither Standard or Optional.
33Adaptive Cruise Control34Note: This illustration is general and details may vary depending on model.

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Adaptive Cruise Control regulates speed byaccelerating and braking. It is normal for thebrakes to emit a slight sound when they arebeing used to adjust speed.
Adaptive Cruise Control always attempts to regu-late speed smoothly. The driver must apply thebrakes in situations requiring immediate braking.For example, when there are great differences inspeed between vehicles or if the vehicle aheadbrakes suddenly. Due to limitations in the radarsensor, braking may occur unexpectedly or not atall.
Adaptive Cruise Control is designed to follow avehicle ahead in the same lane and maintain atime interval to that vehicle set by the driver. If theradar sensor does not detect a vehicle ahead, itwill instead maintain the speed set by the driver.This will also happen if the speed of the vehicleahead exceeds the set speed for your vehicle.
Adaptive Cruise Control can follow anothervehicle at speeds from a standstill up to200 km/h (125 mph).

WARNING
Adaptive Cruise Control is not a collisionavoidance system. The driver is alwaysresponsible and must intervene if the sys-tem fails to detect a vehicle ahead.
Adaptive Cruise Control does not brakefor people or animals and does not brakefor small vehicles, such as bikes andmotorcycles. Similarly, it does not brakefor low trailers, oncoming, slow-moving orstationary vehicles and objects.
Do not use Adaptive Cruise Control indemanding situations, such as in city traf-fic, at intersections, on slippery surfaces,with a lot of water or slush on the road, inheavy rain/snow, in poor visibility, onwinding roads, or on on/off ramps.

CAUTION
Maintenance of Adaptive Cruise Control com-ponents may only be performed by a work-shop – an authorized Volvo workshop is rec-ommended.
Overview
Controls
Function buttons and symbols34.
: Activates Adaptive Cruise Control fromstandby mode and resumes the set speed
: Increases the set speed
: From standby mode - activates theAdaptive Cruise Control and stores the cur-rent speed
: From active mode - deactivates/switches the Adaptive Cruise Control tostandby mode
: Reduces the set speed
Increases the time interval to the vehicleahead
34Note: This illustration is general and details may vary depending on model.

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Reduces the time interval to the vehicleahead
Target vehicle indicator: ACC has detectedand is following a target vehicle using the settime interval
Symbol for time interval to the vehicle ahead

NOTE
In vehicles equipped with Adaptive CruiseControl*, it is possible to switch betweencruise control and Adaptive Cruise Control –see the heading "Switching between CC andACC".
Instrument panel
Speed indicators34.
Set speed
Speed of the vehicle ahead.
The current speed of your vehicle.
See "Adaptive Cruise Control symbols and mes-sages" for examples of different combinations ofsymbols depending on the traffic situation.

Related information
Adaptive Cruise Control and collision warning(p. 295)
Head-up display for Adaptive Cruise Controlwith collision warning (p. 295)
Activating and starting Adaptive Cruise Con-trol (p. 296)
Managing Adaptive Cruise Control speed(p. 297)
Setting Adaptive Cruise Control time inter-vals (p. 298)
Deactivating/reactivating Adaptive CruiseControl (p. 299)
Passing assistance with Adaptive CruiseControl (p. 301)
Starting passing assistance with AdaptiveCruise Control (p. 302)
Limitations of passing assistance with Adap-tive Cruise Control (p. 302)
Switching target vehicles with AdaptiveCruise Control (p. 302)
Automatic braking with Adaptive Cruise Con-trol (p. 303)
Adaptive Cruise Control limitations (p. 304)
Switching between Cruise Control and Adap-tive Cruise Control (p. 305)
Symbols and messages for Adaptive CruiseControl (p. 306)
34Note: This illustration is general and details may vary depending on model.

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Adaptive Cruise Control andcollision warning
Adaptive Cruise Control can alert the driver if thedistance to the vehicle ahead suddenly decrea-ses to an unsafe distance.
Collision warning audible signal and symbol35.
Acoustic collision warning signal
Collision warning symbol
Camera/radar sensor distance monitoring
Adaptive Cruise Control utilizes approx. 40% ofthe vehicle's braking capacity. If a situationrequires more braking force than the AdaptiveCruise Control can provide, and if the driver doesnot apply the brakes, a warning light and audible
warning signal will be activated to alert the driverthat immediate action is required.

WARNING
Adaptive Cruise Control only issues a warningfor vehicles detected by its radar unit – thus, awarning may come after a delay or not at all.
Never wait for a warning. Apply thebrakes when necessary.

Related information
Adaptive Cruise Control* (p. 292)
Head-up display for Adaptive CruiseControl with collision warning
In vehicles equipped with a head-up display*, aflashing warning symbol will be displayed on thewindshield.
Collision warning symbol on the windshield36.

NOTE
Visual warnings on the windshield may be dif-ficult to notice in cases of strong sunlight,reflections, extreme light contrasts, or if thedriver is wearing sunglasses or is not lookingstraight ahead.
35Note: This illustration is general and details may vary depending on model.36Note: This illustration is general and details may vary depending on model.

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Related information
Adaptive Cruise Control* (p. 292)
Head-up display* (p. 138)
Activating and starting AdaptiveCruise Control
Adaptive Cruise Control (ACC37) must first beactivated and then started before it can regulatespeed and distance.

Putting Adaptive Cruise Control in
standby mode
Note: This illustration is general and details may varydepending on model.
Adaptive Cruise Control is in standby mode eachtime the engine is started. To put ACC in standbymode from active mode:
–Press ◀ (2) or ▶ (3) on the steering wheel
keypad and scroll to the (4) function.
> The symbol will appear and AdaptiveCruise Control will go into standby mode.
Starting/activating Adaptive Cruise
Control
To start ACC:
The driver's seat belt must be buckled andthe driver's door must be closed.
There must be a vehicle ahead (target vehi-cle) within a reasonable distance or yourvehicle's current speed must be at least15 km/h (9 mph).
Note: This illustration is general and details may varydepending on model.
–With the (4) function displayed, press
(1) on the steering wheel keypad.
> Adaptive Cruise Control will start and thecurrent speed will be stored, which will beshown by numbers in the center of thespeedometer.
37Adaptive Cruise Control