2019 VOLVO S90 TWIN ENGINE brake light

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LIGHTING
156
The rear fog light turns off automatically whenthe ignition is switched off or when the steering
wheel lever lighting ring is in position or
.

NOTE
Regulations concerning rear fog light use varyfrom country to country.

Related information
Lighting panel and controls (p. 148)
Ignition modes (p. 429)
Brake lights
The brake lights are automatically illuminatedwhen braking.
The brake lights illuminate when the brake pedalis depressed. They also illuminate when thebrakes are automatically applied by one of thedriver support systems.
Related information
Emergency brake lights (p. 156)
Brake functions (p. 430)
Emergency brake lights
The emergency brake lights are activated towarn following vehicles of hard braking.
This function causes an additional taillight oneach side of the vehicle to illuminate.
The emergency brake lights are activated in theevent of hard braking or if the ABS system isactivated and the vehicle is traveling at a highspeed.
After the driver decelerates to a low speed andthen releases the brake, the brake lights resumetheir normal brightness.

Related information
Brake lights (p. 156)
Brakes (p. 431)
Hazard warning flashers (p. 157)

LIGHTING
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Hazard warning flashers
Hazard warning flashers warn other road usersby all of the vehicle's turn signals being activatedat the same time. The function can be used towarn about a traffic hazard.
Hazard warning flashers button.
Press the button to activate the hazard warningflashers.

NOTE
Regulations concerning the use of hazardwarning flashers may vary from country tocountry.

Related information
Emergency brake lights (p. 156)
Using turn signals (p. 154)
Using home safe lighting
Some of the exterior lights remain on to illumi-nate the area around the vehicle. This is calledhome safe lighting.
To activate home safe lighting:
1.Switch off the ignition.
2.Push the left-side steering wheel levertoward the dashboard and release.
3. Exit the vehicle and lock the doors.
When the function is activated, a symbol will beshown in the instrument panel and the parkinglights, outer door handle lights* and the licenseplate lights will be illuminated.
The length of time home safe lighting remainsilluminated can be set in the center display.
Related information
Adjusting light functions via the center dis-play (p. 149)
Welcome Light (p. 157)
Welcome Light
Approach lighting is activated when the vehicleis unlocked and can be used to provide light asyou walk toward the vehicle.
The function is activated when the remote key isused for unlocking. The parking lights, outer doorhandle lights*, license plate lights, interior ceilinglights, footwell lighting and trunk/cargo compart-ment lighting will be illuminated. If a door isopened while the function is activated, the light-ing in the outer door handle* and the interiorlighting will remain illuminated for a longer periodof time.
This function can be activated and deactivated inthe center display.
Related information
Adjusting light functions via the center dis-play (p. 149)
Using home safe lighting (p. 157)
Remote key (p. 237)

DRIVER SUPPORT
274
Electronic Stability Control symbolsand messages
A number of symbols and messages related toElectronic Stability Control (ESC) may be dis-played in the instrument panel.
Some examples of symbols and messages areshown in the table below.
Symbol MessageMeaning
Steady glow forapprox. 2 seconds.System check when the engine is started.
Flashing light.The ESC is actively operating.
Steady glow.Sport mode is activated.
Note: The ESC system is not deactivated in this mode, but has partially reduced functionality.
ESC
Temporarily off
The ESC system's functionality has been temporarily reduced due to high brake system temperatures. Thefunction will be automatically reactivated when the brakes have cooled.
See the message in the instrument panel.
ESC
Service required
The ESC system is not functioning properly.
Stop the vehicle in a safe place, turn off the engine and then restart it.
Consult a workshop if the message persists ‒ an authorized Volvo workshop is recommended.
A text message can be erased by briefly pressing
the button in the center of the right-sidesteering wheel keypad.
If the message persists: Contact a workshop ‒ anauthorized Volvo workshop is recommended.

Related information
Electronic Stability Control (p. 271)

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For vehicles with both CC and ACC
–Change a set speed by pressing the (1)
or (3) buttons briefly or by pressing andholding them:
Press briefly: Press briefly: each presschanges the speed in +/- 5 mph(+/- 5 km/h) increments.
Press and hold: release the button whenthe set speed indicator (4) has moved tothe desired speed.
The most recently set speed will be stored.
If speed is increased by depressing the accelera-
tor pedal while pressing the (1) button onthe steering wheel, the vehicle's speed when thebutton is pressed will be stored as the set speed.
Temporarily increasing speed using the accelera-tor pedal, e.g. when passing another vehicle, willnot affect the setting. The vehicle will return tothe set speed when the accelerator pedal isreleased.

Using engine braking instead of
applying the brakes
Cruise Control regulates speed by lightly applyingthe brakes. On downgrades, it can sometimes bedesirable to roll a bit faster and let speed bereduced instead by engine braking alone. Thedriver can temporarily disengage the Cruise Con-trol braking function.
To disengage CC:
–Press the accelerator pedal about halfwaydown and then release it.
> Cruise Control will automatically disen-gage the automatic brake function andspeed will only be reduced using theengine braking function.
How drive mode affects cruise control
The way the cruise control maintains the vehicle'sspeed can vary depending on the selected drive
mode22.

Cruise Control Eco Cruise with ECO drive
mode
In the ECO drive mode, cruise control's accelera-tion and deceleration will be smoother than inother drive modes to help provide optimal fuelefficiency and reduced environmental impact.Because of this, the vehicle's actual speed maybe slightly above or below the set speed.

Cruise Control Dynamic Cruise
With the Dynamic drive mode, cruise control'sacceleration and deceleration will be faster andmore immediate than in other drive modes.

Related information
Cruise control (p. 283)
Drive modes (p. 446)
Deactivating and putting CruiseControl in standby mode
Cruise Control (CC23) can be temporarily putinto standby mode and then reactivated.
Deactivating and putting Cruise Control
in standby mode
Note: This illustration is general and details may varydepending on model.
To put Cruise Control in standby mode:
–Press the button on the steering wheel(2).
> The Cruise Control markings and symbolswill change from WHITE to GRAY, indicat-ing that Cruise Control is temporarilydeactivated and the driver needs to con-trol the vehicle's speed.
22For more information, see "Drive modes".

DRIVER SUPPORT
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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.

DRIVER SUPPORT
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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.

DRIVER SUPPORT
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WARNING
When Adaptive Cruise Control follows anothervehicle at speeds over approx. 30 km/h(20 mph) and changes target vehicle – from amoving vehicle to a stationary one – AdaptiveCruise Control will ignore the stationary vehi-cle and instead accelerate to the storedspeed.
The driver must then intervene and applythe brakes.

Automatic standby mode when switching
targets
Adaptive Cruise Control will be disabled and gointo 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. 292)
Automatic braking with AdaptiveCruise Control
The Adaptive cruise control (ACC47) 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 inone of the following ways:
Pressing the button on the steeringwheel keypad.
Pressing the accelerator pedal.
> Adaptive Cruise Control will resume fol-lowing the vehicle ahead if it begins tomove within approx. 6 seconds.
NOTE
ACC can keep the vehicle stationary for nomore than 5 minutes – after that time theparking brake is applied and Adaptive CruiseControl is deactivated.
The parking brake must be released beforeAdaptive Cruise Control can be reactivated.

Deactivation of the Auto-hold brake function
In certain situations, Auto-hold will be deactivatedwhen 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 Rpositions
the driver puts Adaptive Cruise Control instandby mode.

Auto Activate Parking Brake
In certain situations, the parking brake will beapplied to keep the vehicle at a standstill.
46Adaptive Cruise Control47Adaptive Cruise Control

DRIVER SUPPORT
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WARNING
The Pilot Assist function is supplementarydriver support intended to facilitate driv-ing and help make it safer – it cannothandle all situations in all traffic, weatherand 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).
Pilot Assist should only be used if thereare clear lane lines painted on each sideof the lane. All other use will increase therisk of contact with nearby obstacles thatcannot be detected by the functions.
Pilot Assist is not a substitute for the driv-er's attention and judgment. The driver isalways responsible for ensuring the vehi-cle is driven in a safe manner, at theproper position within the lane, at theappropriate speed, with an appropriatedistance to other vehicles, and in accord-ance with current traffic rules and regula-tions.
NOTE
Depending on market, this function may beeither Standard or Optional.
Pilot Assist regulates speed by accelerating andbraking. It is normal for the brakes to emit a slightsound when they are being used to adjust speed.
Pilot Assist attempts to smoothly regulate speed.The driver must apply the brakes in situationsrequiring immediate braking. For example, whenthere are great differences in speed betweenvehicles 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 aheadin the same lane and maintain a time interval tothat vehicle set by the driver. If the radar sensordoes not detect a vehicle ahead, it will insteadmaintain the speed set by the driver. This will alsohappen if the speed of the vehicle aheadexceeds the set speed for your vehicle.
Pilot Assist can follow another vehicle atspeeds from a standstill up to 200 km/h(125 mph).
Pilot Assist can provide steering assistancefrom near-stationary speeds up to 140 km/h(87 mph).
WARNING
Pilot Assist is not a collision avoidancesystem. The driver must intervene if thesystem fails to detect a vehicle ahead.
Pilot Assist does not brake for people,animals, objects, small vehicles (e.g.cycles and motorcycles), low trailers aswell 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 ofwater or slush on the road, in heavy rain/snow, in poor visibility, on winding roads,on highway on- or off-ramps, or with atrailer connected to the vehicle.

CAUTION
Maintenance of the integrated components inPilot Assist may only be performed by a work-shop – an authorized Volvo workshop is rec-ommended.

In curves and forks in the road
Pilot Assist is designed to interact with the driver.The driver should never wait for steering assis-tance from Pilot Assist, but instead should alwaysbe ready to increase his or her own steeringefforts, particularly in curves.