2017 VOLVO V90 Owners Manual

STARTING AND DRIVING
407
•
Brake now and again to remove any layer of salt. Make sure that other road users are notput at risk by the braking.
• Gently depress the brake pedal after finish-ing driving and before starting your next trip.
MaintenanceTo keep the car as safe and reliable as possible,follow the Volvo service intervals as specified inthe Service and Warranty Booklet. New and replaced brake linings and brake discs do not provide optimal braking effect until theyhave been "worn in" a few hundred kilometres.Compensate for the reduced braking effect bydepressing the brake pedal harder. Volvo recom-mends only fitting brake linings that are approvedfor your Volvo.
IMPORTANT
The wear on the brake system's components must be checked regularly. Contact a workshop for information about the procedure or engage a workshop to carry outthe inspection - an authorised Volvo work-shop is recommended.
Symbols in the driver display
Symbol
Specification
Check the brake fluid level. If the level is low, fill with brake fluid andcheck for the cause of the brakefluid loss.
Constant glow for 2 seconds when the engine is started: Automaticfunction check. Constant glow for more than 2 seconds: Fault in the ABS system.The car's normal brake system isstill working, but without the ABSfunction.
WARNING
If both the warning lamps for brake fault and ABS fault illuminate at the same time, a faulthas occurred in the brake system.
• If the level in the brake fluid reservoir is normal at this stage, drive carefully to thenearest workshop and have the brakesystem checked - an authorised Volvoworkshop is recommended.
• If the brake fluid is below the
MIN level in
the brake fluid reservoir, do not drive fur-ther before topping up the brake fluid.The reason for the loss of brake fluidmust be investigated.
Related information
• Brake functions (p. 406)
• Brake assistance (p. 408)
• Brake lights (p. 143)
• Emergency brake lights (p. 408)

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Emergency brake lightsEmergency brake lights are activated to alert vehicles behind about heavy braking. The func-tion means that the brake light flashes instead of- as in normal braking - shining with a constantglow.
The emergency brake lights are activated during heavy braking or if the ABS system is activated athigh speeds. After emergency braking to a lowspeed, the brake lights return from flashing to thenormal constant glow. The car's hazard warningflashers are activated at the same time. Theseflash until the driver accelerates the car to ahigher speed again or switches off the hazardwarning flashers.
Related information
• Foot brake (p. 406)
• Hazard warning flashers (p. 143)
• Brake lights (p. 143)
Brake assistance
The brake assist system, BAS (Brake Assist System), helps to increase brake force duringbraking, thereby shortening the braking distance.
The system detects the way in which the driver brakes and increases brake force where neces-sary. The brake force can be boosted up to thelevel when the ABS system is engaged. Thefunction is suspended when the pressure on thebrake pedal decreases.
NOTE
When BAS is activated the brake pedal low- ers slightly more than usual, depress (hold)the brake pedal as long as necessary. When the brake pedal is released, all braking ceases.
Related information
• Foot brake (p. 406)
Auto braking after a collision In the event of a collision in which the activation level is reached for the pyrotechnic seatbelt ten-sioners or airbags, or if a collision with a largeanimal is detected, the car's brakes are automat-ically applied. This function is to prevent orreduce the effects of any subsequent collision.
After a serious collision there is a risk that it is no longer possible to control and steer the car. Inorder to avoid or mitigate a possible further colli-sion with a vehicle or an object in the vehicle'spath, the auto braking system is activated auto-matically and brakes the car in a safe manner. Brake lights and hazard warning lights are acti- vated during braking. When the car has stopped,the hazard warning lights continue to flash andthe parking brake is applied. If braking is not appropriate, e.g. if there is a risk of being hit by following traffic, the system can beoverridden by the driver depressing the accelera-tor pedal. The function assumes that the brake system is intact after the collision. See also the sections "Rear Collision Warning" and "Blind Spot Information".
Related information
• Brake functions (p. 406)
• Seatbelt tensioner (p. 59)
• Airbags (p. 63)

STARTING AND DRIVING
* Option/accessory.409
•
Rear Collision Warning (p. 340)
• Blind Spot Information
* (p. 340)
Parking brake The parking brake prevents the car from rolling away from stationary by means of mechanicallylocking/blocking two wheels.
The control for the parking brake is located in the tunnel console between the seats.
A faint electric motor noise can be heard when the electrically-operated parking brake is beingapplied. The noise can also be heard during theautomatic function checking of the parking brake. If the car is stationary when the parking brake is applied then it only acts on the rear wheels. If it isapplied when the car is moving then the normalfoot brake is used, i.e. the brake acts on all fourwheels. Brake function changes over to the rearwheels when the car is almost stationary.
Related information
• Brake functions (p. 406)
• Using the parking brake (p. 410)
• In the event of a fault in the parking brake(p. 411)

STARTING AND DRIVING
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Using the parking brake
Use the parking brake to prevent the car from rolling from stationary.
Applying the parking brake
1. Pull the control upward.
> The symbol in the driver display illumi-nates when the parking brake is applied.
2. Check that the car is stationary.
Symbol in the driver display
Symbol Specification
The symbol is illuminated when the parking brake is applied. If the symbol flashes, it indicates a fault has occurred. Read the mes-sage on the driver display.
Automatic application
The parking brake is applied automatically:
• if the Auto Hold function (automatic braking when stationary) is activated and the car hasbeen stationary approx. 5 minutes.
• when gear position
P is selected on a steep
hill 12
.
• when the car has been switched off.
Emergency brake
In an emergency, the parking brake can be applied when the car is in motion by pulling andholding up the control. Braking stops when thecontrol is released.
NOTE
An acoustic signal sounds while emergency braking is active at high speeds.
Releasing the parking brake
Releasing manually
1. Depress the brake pedal firmly.
2. Press the control down.
> The parking brake releases and the sym-bol in the driver display extinguishes.
12Applies to automatic gearbox.

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411
Releasing automatically
1. Put the seatbelt on.
2. Start the car.
3. With automatic gearbox:Select gear position D or R and depress the
accelerator pedal.With manual gearbox:Engage a suitable gear, release the clutch and depress the accelerator pedal.
> The parking brake releases and the sym- bol in the driver display extinguishes.
Parking on a hill
WARNING
Always use the parking brake when parking on an inclined surface. Engaging a gear or the automatic transmission's P position is not suf-
ficient to hold the car stationary in all situa- tions.
If the car is parked facing uphill: • Turn the wheels
away from the kerb.
If the car is parked facing downhill:
• Turn the wheels
towards the kerb.
Heavy load uphill
A heavy load, such as a trailer, can cause the car to roll backward when the parking brake isreleased automatically on a steep incline. Avoid this by pulling the control upwards while drivingthe car away. Release the control when theengine achieves traction.
Settings for parking brake
Automatic activation of the parking brake isselected via the centre display. Automatic activation when the car is switched off:1.
Press
Settings in the top view.
2. Press
My CarParking Brake and
Suspension and deselect/select the func-
tion Auto Activate Parking Brake.
Related information
• Parking brake (p. 409)
• In the event of a fault in the parking brake (p. 411)
• Automatic braking when stationary (p. 412)
In the event of a fault in the parking brake
Contact an authorised Volvo workshop if it is not possible to release or apply the parking brakeafter several attempts.
An acoustic warning signal sounds when driving with the parking brake applied. If the car has to be parked before a possible fault is rectified then the wheels must be turned as ifparking on a hill and the gear selector must be in position P, or engage first gear if the car has a
manual gearbox.
Low battery voltageIf the battery voltage is too low then the parking brake can neither be released nor applied. Con-nect a donor battery if the battery voltage is toolow.
Replacing the brake liningsThe rear brake linings must be replaced at aworkshop due to the design of the electrically-operated parking brake - an authorised Volvoworkshop is recommended.

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Symbols in the driver display
SymbolSpecification
If the symbol flashes, it indicates a fault has occurred. See the mes-sage in the driver display.
Fault in brake system. See the message in the driver display.
Information message in driver dis- play.
Message examples:
•
Parking brake Service required
•Parking brake System overheated
•Parking brake Temporarily unavailable
Related information
• Brake functions (p. 406)
• Using the parking brake (p. 410)
• Parking brake (p. 409)
• Using jump starting with another battery (p. 388)
Hill start assist
Hill start assist, Hill Start Assist (HSA), prevents the car from rolling backwards when starting onan uphill gradient. When reversing uphill, it pre-vents the car from rolling forwards.
The function means that the pedal pressure in the brake system remains for several secondswhile the driver's foot is moved from brake pedalto accelerator pedal. The temporary braking effect releases after sev- eral seconds or when the driver accelerates. Hill start assist is available even if the function for automatic braking when stationary (Auto hold) isdeactivated.
Related information
• Brake functions (p. 406)
• Automatic braking when stationary (p. 412)
Automatic braking when stationary
Automatic braking when stationary (Auto Hold) means that the driver can release the brakepedal while maintaining braking effect when thecar has stopped at traffic lights or a junction.
FunctionWhen the car has stopped, the brakes are acti- vated automatically. The function can use eitherfoot brake or parking brake to hold the car sta-tionary and it works on all gradients. When theaccelerator pedal is depressed again, the brakesare released. When braking to a stop on a downhill or uphill gradient - depress the brake pedal a bit harderbefore releasing to ensure that the car does notroll at all. If the driver switches off the engine when the car is stationary, the parking brake is applied.
Automatic deactivation
The function is deactivated automatically: • when the driver's door is open and the driv- er's seatbelt is unfastened.
• in gear position
N13
.
13 Applies to automatic gearbox.

STARTING AND DRIVING
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Switch for automatic brake
An indicator in the button illuminates when the function is activated.
Activate or deactivate Auto Hold with the switch in the tunnel console. The function remains deac-tivated until it is reactivated.If the function is active and holds thecar with the foot brake (A-symbol illu-minated) then the brake pedal must bedepressed at the same time as the
button is depressed in order to deactivate.
When the function is deactivated, hill start assist (HSA) remains active to prevent the car from roll-ing backwards when starting on an uphill gradi-ent.
Symbols in the driver display
Symbol Specification
The symbol is illuminated when the function uses the foot brake tokeep the car stationary.
The symbol is illuminated when the function uses the parking brake tokeep the car stationary.
Related information
•Brake functions (p. 406)
• Hill start assist (p. 412)
Driving in water Driving in water means that the car is driven through deep water on a water-covered road-way. Driving in water must be carried out withgreat caution.
The car can be driven through water at a maxi- mum depth of 25 cm at a maximum speed ofwalking pace. Extra caution should be exercisedwhen passing through flowing water. During driving in water, maintain a low speed and do not stop the car. When the water has beenpassed, depress the brake pedal lightly andcheck that full brake function is achieved. Waterand mud for example can make the brake liningswet resulting in delayed brake function.
• If necessary, clean the contacts for the elec-tric heater and trailer coupling after driving inwater and mud.
• Do not let the car stand with water over thesills for any long period of time - this couldcause electrical malfunctions.

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IMPORTANT
Engine damage can occur if water enters the air filter. In depths greater than 25 cm, water could enter the transmission. This reduces the lubri-cating ability of the oils and shortens theservice life of these systems. Damage to any component, engine, transmis- sion, turbocharger, differential or its internalcomponents caused by flooding, hydrostaticlocking or oil shortage, is not covered by thewarranty. In the event of the engine stalling in water, do not try restart - tow the car from the water toa workshop - an authorised Volvo workshop isrecommended. Risk of engine breakdown.
Related information
•Towing (p. 431)
• Recovering the car (p. 432)
Overheating in the engine and drive system
Under special conditions, for example hard driv- ing in hilly terrain and hot climate, there is a riskthat the engine and drive system may overheat -in particular with a heavy load.
• In the event of overheating, the engine's power may be limited temporarily.
• Remove any auxiliary lamps from in front ofthe grille when driving in hot climates.
• If the temperature in the engine's coolingsystem becomes too high then a warningsymbol is illuminated and the driver display shows the message
Engine temperature
High temperature Stop safely. Stop the
car in a safe way and allow the engine to run at idling speed for several minutes and cooldown.
• If the message
Engine temperature High
temperature Turn off engine or Engine
coolant Level low, turn off engine is
shown, stop the car and switch off the engine.
• In the event of overheating in the gearbox, analternative gear shift program will beselected. In addition, a built-in protectionfunction is activated that, amongst otherthings, illuminates a warning symbol and thedriver display shows the message
Transmission warm Reduce speed to
lower temperature or Transmission hot Stop safely, wait for cooling
. Follow the
recommendation given, reduce speed or stop the car in a safe way and allow the engine torun at idling speed for several minutes toenable the gearbox to cool down.
• If the car overheats, the air conditioning maybe switched off temporarily.
• Do not turn the engine off immediately youstop after a hard drive.
NOTE
It is normal for the engine's cooling fan to operate for a time after the engine has beenswitched off.
Symbols in the driver display
Symbol
Specification
High engine temperature. Follow the recommendation given.
Low level, coolant. Follow the rec- ommendation given.
Gearbox hot/overheated/cooled. Follow the recommendation given.