engine VOLVO V90 2017 Service Manual

DRIVER SUPPORT
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* Option/accessory.297
Deactivating/activating the adaptive cruise control *
The adaptive cruise control (Adaptive Cruise Control - ACC) can be temporarily deactivatedso that it is set in the standby mode and canlater be reactivated.
Deactivate Adaptive Cruise Control and set it in standby mode
NOTE: The illustration is schematic - details may vary depending on car model.
To temporarily switch off Adaptive Cruise Control and set it in standby mode:
–Press the steering wheel button (2).
> The
symbol on the driver display
changes colour from WHITE to GREY and the stored speed in the centre of thespeedometer changes from BEIGE toGREY. In standby mode, the driver must him/herselfcontrol both speed and distance. When the adaptive cruise control is in standby mode and the car drives too close to a vehicleahead, the driver is warned about the short dis-tance by the Distance Warning function instead(see reference to the heading "Distance Warn-ing" at the end of this section).
Standby mode on driver intervention
The adaptive cruise control is temporarily deacti- vated and set in standby mode if:
• the foot brake is used
• the gear selector is moved to
N position.
• the driver maintains a speed higher than thestored speed for longer than 1 minute.
• the clutch pedal is depressed for approx. 1minute - applies to cars with manual gearbox.
In this situation, the driver must intervene andadapt the speed and distance to the vehicleahead. A temporary increase in speed with the accelera- tor pedal, e.g. during overtaking, does not affectthe setting - the car returns to the last storedspeed when the accelerator pedal is released.
Automatic standby mode
Adaptive cruise control is dependent on other systems, e.g. stability control/anti-skid ESC. If anyof these systems stops working, adaptive cruisecontrol is switched off automatically. In the event of automatic deactivation a signal willsound and a message is shown in the driver dis-play. The driver must then intervene and adaptthe speed and distance to the vehicle ahead. Automatic deactivation may occur if:
• the speed is below 5 km/h (3 mph) and ACC is uncertain whether the vehicle ahead is astationary vehicle or an object, such as aspeed bump.
• the speed is below 5 km/h (3 mph) and thevehicle ahead turns off so that ACC nolonger has a vehicle to follow.
• speed is reduced to below 30 km/h(20 mph) - only applies to cars with manualgearbox.
• the driver opens the door
• the driver takes off the seatbelt
• engine speed is too low/high
• wheels lose traction
• brake temperature is high
• the parking brake is applied
• the camera and radar unit is covered by e.g.snow or heavy rainfall (camera lens/radiowaves are blocked).

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DRIVER SUPPORT
* Option/accessory.
300 front starts moving again then the adaptive cruise control is set in standby mode with automaticbraking.
–The Adaptive Cruise Control is reactivated in one of the following ways:
• Press the steering wheel button
.
• Depress the accelerator pedal.
> The Adaptive Cruise Control resumes fol- lowing the vehicle ahead if it starts mov- ing forward within 6 seconds.
NOTE
ACC can keep the car stationary for a maxi- mum of 5 minutes. After this the parkingbrake is applied and adaptive cruise control isdisengaged. The parking brake must be released before the adaptive cruise control can be reactivated.
Cessation of automatic braking
In some situations, automatic braking ceases on reaching 0 km/h and Adaptive Cruise Control isset in standby mode. This means that the brakesare released and the car may start to roll - thedriver must therefore intervene and brake the carhimself/herself to keep it stationary. This may take place in the following situations:
• the driver puts his/her foot on the brakepedal
• the parking brake is applied
• the gear selector is moved to
P, N , or R posi-
tion
• the driver sets the adaptive cruise control inthe standby mode.
Automatic activation of parking brakeIn certain situations the parking brake is appliedto keep the car stationary. This takes place if the adaptive cruise control is holding the car stationary with the foot brake and: •the driver opens the door or takes off his/her seatbelt
• ACC has kept the car stationary for morethan approx. 5 minutes
• the brakes have overheated
• the engine is switched off.
Related information
•
Adaptive cruise control
* (p. 290)
Limitations of the adaptive cruise control *
The (Adaptive Cruise Control - ACC) may have limitations in certain situations.
Steep roads and/or heavy loadBear in mind that the adaptive cruise control is primarily intended for use when driving on levelroad surfaces. The function may have difficulty inkeeping the correct distance from the vehicleahead when driving on steep downhill slopes - inwhich case, be extra attentive and ready to brake.Do not use the adaptive cruise control with aheavy load or with a trailer connected to the car.
Miscellaneous
• Drive mode Off Road cannot be selected
when the adaptive cruise control is activated.
NOTE
The function uses the car's radar unit, which has some general limitations, see the "Limita-tions for radar unit" section.
Related information
• Adaptive cruise control
* (p. 290)
• Limitations of the radar unit (p. 319)

DRIVER SUPPORT
* Option/accessory.301
Change between Cruise control and adaptive cruise control *
In a car with Adaptive Cruise Control (ACC) the driver can change between Cruise Control (CC)and ACC.
A symbol in the driver display shows which cruise control is active:
CC
Cruise Control ACC
Adaptive Cruise Control
AA
Cruise control Adaptive cruise control
A WHITE symbol: Function active, GREY symbol: Standby mode
Changing from ACC to CCHow to change from Adaptive Cruise Control (ACC) to Cruise Control (CC):
1. Set adaptive cruise control in standby mode
using the
steering wheel button.
2. Tap on the
Cruise control button in the
function view - the button's indicator changes colour from GREY to GREEN.
> The symbol in the driver display changes
from
ACC to CC. Adap-
tive Cruise Control (ACC) is now switched off and Cruise Control (CC) is set instandby mode. 3.
Press the steering wheel button
.
> Cruise control starts and stores the cur- rent speed.
WARNING
The car no longer maintains the preset time interval after switching from ACC to CC - itmerely follows the set speed.
If CC is active when the engine is switched off, ACC will be activated the next time the engine isstarted.
Changing from CC to ACCProceed as follows to change from cruise control(CC) to adaptive cruise control (ACC):
1. Set cruise control in standby mode using the
steering wheel button.
2. Tap on the
Cruise control button in the
function view - the button's indicator changes colour from GREEN to GREY.
> The symbol in the driver display changes
from
CC to ACC. Adap-
tive Cruise Control is set in standby mode.
3. Press the steering wheel button
.
> Adaptive cruise control starts and stores the current speed, together with the pre- set time interval to the vehicle ahead.
Related information
• Cruise control (p. 284)
• Adaptive cruise control
* (p. 290)

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DRIVER SUPPORT
* Option/accessory.
312
Automatic standby mode
Pilot Assist is dependent on other systems, e.g. stability control/anti-skid ESC. If any of theseother systems stops working, Pilot Assist isswitched off automatically. In the event of automatic deactivation a signal will sound and a message is shown in the driver dis-play. The driver must then intervene and adaptthe speed and distance to the vehicle ahead. Automatic deactivation may occur if:
• the speed is below 5 km/h (3 mph) and Pilot Assist is uncertain whether the vehicle aheadis a stationary vehicle or an object, such as aspeed bump.
• the speed is below 5 km/h (3 mph) and thevehicle ahead turns off so that Pilot Assist nolonger has a vehicle to follow.
• speed is reduced to below 30 km/h(20 mph) - only applies to cars with manualgearbox.
• the driver's hands are not on the steeringwheel
• the driver opens the door
• the driver takes off the seatbelt
• engine speed is too low/high
• wheels lose traction
• brake temperature is high
• the parking brake is applied •
the camera and radar unit is covered by e.g.snow or heavy rainfall (camera lens/radiowaves are blocked).
Reactivating Pilot Assist from the
standby mode
NOTE: The illustration is schematic - details may vary depending on car model.
–Press the steering wheel button (1).
> The speed is then set to the most recently stored speed.
NOTE
A marked speed increase may occur once the speed has been resumed by pressing steer- ing wheel button
.
Related information
• Pilot Assist
* (p. 304)
• Activating and starting the Pilot Assist
*
(p. 307)
• Managing the speed for Pilot Assist
* (p. 309)
• Setting the time interval for Pilot Assist
*
(p. 310)
• Change of target and automatic braking with Pilot Assist
* (p. 313)
• Overtaking assistance with the adaptivecruise control
* or Pilot Assist * (p. 298)
• Limitations of Pilot Assist
* (p. 314)
• Symbols and messages for Pilot Assist
*
(p. 316)
• Distance Warning
* (p. 288)

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DRIVER SUPPORT
* Option/accessory.
314
Cessation of automatic braking
In some situations, automatic braking ceases on coming to a standstill and Pilot Assist is set instandby mode. This means that the brakes arereleased and the car may start to roll - the drivermust therefore intervene and brake the car him-self/herself to keep it stationary. This may take place in the following situations:
• the driver puts his/her foot on the brake pedal
• the parking brake is applied
• the gear selector is moved to
P, N , or R posi-
tion
• the driver sets Pilot Assist in the standbymode.
Automatic activation of parking brakeIn certain situations the parking brake is appliedto keep the car stationary. This takes place if Pilot Assist is holding the car stationary with the foot brake and: •
the driver opens the door or takes off his/her seatbelt
• Pilot Assist has kept the car stationary formore than approx. 5 minutes
• the brakes have overheated
• the engine is switched off.
Related information
•
Pilot Assist
* (p. 304)
• Activating and starting the Pilot Assist
*
(p. 307)
• Managing the speed for Pilot Assist
* (p. 309)
• Setting the time interval for Pilot Assist
*
(p. 310)
• Deactivating/activating the Pilot Assist
*
(p. 311)
• Overtaking assistance with the adaptive cruise control
* or Pilot Assist * (p. 298)
• Limitations of Pilot Assist
* (p. 314)
• Symbols and messages for Pilot Assist
*
(p. 316)
Limitations of Pilot Assist *
The Pilot Assist function may have limitations in certain situations.
The Pilot Assist function is an aid which can help the driver in many situations. But the driver is atall times responsible for maintaining a safe dis-tance to surrounding objects and a correct posi-tion in the lane.

DRIVER SUPPORT
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* Option/accessory.321
High temperatureAt very high temperatures the camera and radar unit can temporarily be switched off forabout 15 minutes after the engine is started soas to protect the unit's electronics. The cameraand radar unit restarts automatically when thetemperature has fallen sufficiently.
Damaged windscreen
IMPORTANT
If a crack, scratch or stone chip in the wind- screen in front of one of the camera andradar unit “windows” covers an area ofapprox. 0.5 x 3.0 mm or larger, a workshopmust be contacted to have the windscreenreplaced. An authorised Volvo workshop isrecommended. If not rectified it can lead to reduced perform- ance for the driver support systems that usethe camera and radar unit. This may mean that functions are reduced, deactivated completely or give incorrect func-tion response. To avoid the risk of failed, deficient or reduced operation of driver support systemsthat use the radar unit, the following alsoapplies:
• Volvo recommends
against repairing
cracks, scratches or stone chips in thearea in front of the camera and radar unit.Instead, the whole windscreen should bereplaced.
• Before replacing a windscreen, contactan authorised Volvo workshop to verifythat the correct windscreen is orderedand fitted.
• The same type or Volvo-approved wind- screen wipers must be fitted duringreplacement.
IMPORTANT
When the windscreen is replaced, the camera and radar unit must be recalibrated at theworkshop to ensure the functionality of all thecar

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DRIVER SUPPORT
328
CauseAction
The windscreen surface in front of the camera and radar unit is dirty or covered with ice or snow. Clean dirt, ice and snow from the windscreen surface in front of the camera andradar unit.
Thick fog and heavy rain or snow block the radar signals or the cameraview. No action. Sometimes the unit does not work during heavy rain or snowfall.
Water or snow from the road surface swirls up and blocks the radarsignals or camera view. No action. Sometimes the unit does not work on a very wet or snow-covered roadsurface.
Dirt has appeared between the inside of the windscreen and the cam-era and radar unit. Visit a workshop to have the windscreen inside the unit's cover cleaned - anauthorised Volvo workshop is recommended.
Strong oncoming light No action. The camera unit is reset automatically in more favourable light condi-tions.
NOTE
Keep the windscreen clean in front of the camera and radar unit.
High temperatureAt very high temperatures the camera and radar unit can temporarily be switched off forabout 15 minutes after the engine is started soas to protect the unit's electronics. The cameraand radar unit restarts automatically when thetemperature has fallen sufficiently.
Damaged windscreen
IMPORTANT
If a crack, scratch or stone chip in the wind- screen in front of one of the camera andradar unit “windows” covers an area ofapprox. 0.5 x 3.0 mm or larger, a workshopmust be contacted to have the windscreenreplaced. An authorised Volvo workshop isrecommended. If not rectified it can lead to reduced perform- ance for the driver support systems that usethe camera and radar unit.
This may mean that functions are reduced, deactivated completely or give incorrect func-tion response. To avoid the risk of failed, deficient or reduced operation of driver support systemsthat use the radar unit, the following alsoapplies:
• Volvo recommends
against repairing
cracks, scratches or stone chips in thearea in front of the camera and radar unit.Instead, the whole windscreen should bereplaced.
• Before replacing a windscreen, contactan authorised Volvo workshop to verify

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DRIVER SUPPORT
332
Auto Brake
The automatic brake function is activated last. If in this situation the driver has not yet started to take evasive action and the risk of collision isimminent then the automatic braking function isdeployed - this takes place irrespective ofwhether or not the driver brakes. Braking thentakes place with full brake force in order toreduce collision speed, or with limited brake forceif it is sufficient to avoid a collision. In connection with automatic braking the seatbelt tensioner may also be activated. For more infor-mation see the "Seatbelt tensioner" section. In some situations, the action of Auto-brake may begin with light braking and then progress to fullbrake action. When City Safety has prevented a collision with a stationary object, the car remains stationary inanticipation of positive action by the driver. If thecar has been braked to avoid collision with aslower vehicle in front, its speed is reduced tomatch that of the vehicle in front.
NOTE
On cars with manual gearbox, the engine stops when the Auto-brake function has stop-ped the car, unless the driver has managed todepress the clutch pedal beforehand.
The driver can always interrupt a braking inter- vention by firmly depressing the acceleratorpedal.
NOTE
When City Safety™ brakes, the brake lights
come on.
When City Safety is activated and brakes the vehicle, the driver display shows a text messageto the effect that the function is/has been active.
WARNING
City Safety must not be used as an excuse for the driver to change his/her driving style. Ifthe driver relies solely on City Safety to do thebraking, there might be a risk of a collisionsooner or later.
Related information
• Setting the warning distance for City Safety (p. 332)
• Detection of obstacles with City Safety
™
(p. 333)
• City Safety when evasive manoeuvres areprevented (p. 336)
• City Safety in cross traffic (p. 335)
• Limitations of City Safety (p. 337)
• Messages for City Safety (p. 339)
• Seatbelt tensioner (p. 59)
Setting the warning distance for City Safety
City Safety is always activated, but it is possible to select the warning distance for the function.
NOTE
The City Safety function cannot be deacti- vated. It is activated automatically when theengine/electric operation is started andremains switched on until the engine/electricoperation is switched off.
The warning distance determines the sensitivity of the system and regulates the distance atwhich the visual, acoustic and haptic warningsshall be triggered. 1. Tap on
Settings in top view in the centre
display.
2. Press
My CarIntelliSafe.
3. Under
City Safety Warning, select Late,Normal or Early to set the desired warning
distance.
If the
Early setting produces too many warnings,
which could be perceived as irritating in certain situations, then use the
Normal or Late warning
distance. If warnings are perceived as being too frequent or disturbing then the warning distance can bereduced. This would lead to the system warning

DRIVER SUPPORT
* Option/accessory.
340
Rear Collision Warning
The Rear Collision Warning (RCW) function can help the driver to avoid being hit by a vehicleapproaching from behind.
RCW is activated automatically each time the engine is started. The RCW can warn the driver in a vehicle approaching from behind that a collision is immi-nent by rapidly flashing the direction indicators. If, at a vehicle speed below 30 km/h (20 mph), the RCW function detects that the car is in dan-ger of being hit from behind, the seatbelt ten-sioners may tension the front seatbelts and theWhiplash Protection System safety system isactivated. Immediately before the collision, RCW may also activate the foot brake in order to reduce the for-ward acceleration of the car during the collision.However, the foot brake is only activated if thecar is stationary. The foot brake releases immedi-ately if the accelerator pedal is depressed.
LimitationsIn certain cases the RCW may have difficultyhelping the driver in the event of a collision risk.This can be for example:
• if the vehicle approaching from the rear isdetected too late
• if the vehicle approaching from the rearchanges lane at the last moment •
if the vehicle approaching from the rear has aspeed exceeding 80 km/h (50 mph).
NOTE
In certain markets, RCW does
not give a
warning with the direction indicators due to local traffic regulations - in such cases, thispart of the function is deactivated.
NOTE
The warning with direction indicators for Rear Collision Warning is deactivated if the warn-ing distance for collision warning in the CitySafety function is set at the lowest level "
Late".
The seat belt pre-tensioning and braking functions are, however, still active.
Related information
• City Safety (p. 330)
• Setting the warning distance for City Safety (p. 332)
• Seatbelt tensioner (p. 59)
• Whiplash Protection System (p. 57)
Blind Spot Information
*
The Blind Spot Information (BLIS) function is designed to give a warning of vehicles diago-nally behind and to the side of your car so as togive assistance in heavy traffic on roads withseveral lanes in the same direction.
BLIS is a driver aid intended to give a warning of: • vehicles in the car's blind spot
• quickly approaching vehicles in the left and right lanes closest to the car.

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DRIVER SUPPORT
* Option/accessory.
342
WARNING
The system is a supplement to, not a replace- ment for, a safe driving style and use of therearview mirrors. It can never replace the driv-er's attention and responsibility. The responsi-bility for changing lanes safely always restswith the driver.
Related information
• Activate/deactivate Blind Spot Information
*
(p. 342)
• Limitations of Blind Spot Information
*
(p. 343)
• Messages for Blind Spot Information
* and
Cross Traffic Alert * (p. 347)
• Cross Traffic Alert
* (p. 343)
Activate/deactivate Blind Spot Information *
The Blind Spot Information (BLIS) function can be activated/deactivated.
Location of Blind Spot Information lamp 16
.
Indicator lamp
The function is activated/deactivated using the BLIS button in the centre display's func-tion view.
–Tap on the BLIS button in function view.
> BLIS is activated/deactivated - a green/ grey indicator is shown in the button.
If BLIS is activated when starting the engine, the function is confirmed by the door mirror indicatorlamps blinking once. If BLIS was deactivated when the engine wasswitched off, it will continue to be deactivatedwhen the engine is next started and no indicatorlights will then be illuminated.
WARNING
Blind Spot Information is a supplementary aid and does not work in all situations. Blind Spot Information is no substitute for a safe driving style and the use of rearview anddoor mirrors. Blind Spot Information can never replace responsibility and attention by the driver. It isalways the driver