2020 VOLVO S90 brake

DRIVER SUPPORT
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* Option/accessory.373
3. Be prepared to stop the vehicle when
instructed to do so by a graphic and mes- sage in the center display. Follow theinstructions in the same way as for theparking procedure.
Note that the steering wheel can "spring"back when the procedure is completed andthe driver may need to turn the steering wheelback to the maximum position in order to pullout of the parking space. If the function determines that the driver can pull out of the parking space without any extramaneuvers, the function will be deactivated,even if it seems as though the vehicle is notcompletely out of the parking space.
Related information
Park Assist Pilot
* (p. 368)
Park Assist Pilot
* limitations (p. 373)
Park Assist Pilot * limitations
Park Assist Pilot (PAP 100
) may not be able to
detect all conditions in all situations and func- tionality may therefore be limited.
WARNING
The parking sensors have dead/blind spots where objects cannot bedetected.
Pay particular attention to people andanimals near the vehicle.
Bear in mind that the front end of thevehicle may swing out towards oncom-ing traffic during the parking maneuver.
CAUTION
Objects situated higher than the detection area of the sensors are not included whenthe parking maneuver is calculated, whichcould cause the function to swing into theparking space too early. Such parkingspaces should be avoided for this reason.
The driver should be aware of the following limitations for Park Assist Pilot:
The parking sequence is cancelledA parking sequence will be cancelled if: the driver moves the steering wheel
the vehicle's speed exceeds 7 km/h (4 mph)
the driver taps
Cancel in the center dis-
play
when the anti-lock brakes or the Elec- tronic stability control are engaged - e.g.when a wheel loses grip on a slippery road
when speed-dependent power steeringwheel resistance is working at reducedpower – e.g. during cooling due to over-heating.
A message in the center display will explainwhy the parking sequence was cancelled.
CAUTION
Under certain circumstances, the function may not be able to find parking spaces –one reason may be that the sensors aredisrupted by external sound sources thatemit the same ultrasonic frequencies thatthe system works with. Examples of such sources include horns, wet tires on asphalt, pneumatic brakes,exhaust noise from motorcycles, etc.
100 Park Assist Pilot

STARTING AND DRIVING
* Option/accessory.
378
Starting the vehicle
The vehicle can be started using the start knob in the tunnel console when the remotekey is in the passenger compartment.
Start knob in the tunnel console.
WARNING
Before starting:
Buckle your seat belt.
Adjust the seat, steering wheel and mirrors.
Make sure you can fully depress thebrake pedal.
The remote key is not physically used to startthe ignition because the vehicle is equippedwith the keyless Passive Start system. To start the vehicle:
1. The remote key must be inside the vehicle.
For vehicles with Passive Start, the key must be in the front section of the passen-ger compartment. With the optional key- less locking/unlocking function *, the key
can be anywhere in the vehicle.
2. Press and hold down the brake pedal 1
as
far as possible.
3. Turn the start knob clockwise and release. The control will automatically return to the original position.
WARNING
Never use more than one inlay mat at a time on the driver's floor. If any othertype of floor mat is used, remove theoriginal mat from the driver's seat floorbefore driving. All types of mats mustbe securely anchored in the attach-ment points in the floor. Make sure thefloor mat does not impede the move-ment of the brake pedal or acceleratorpedal in any way, as this could be aserious safety hazard.
Volvo's floor mats are specially manu-factured for your vehicle. They must beproperly secured in the attachmentpoints in the floor to help ensure theycannot slide and become trappedunder the pedals.
The starter motor will crank until the enginestarts or until overheating protection is trig-gered.
Error messagesIf the Vehicle key not found message is
shown in the instrument panel at start, place the remote key at the backup reader and thenmake a new start attempt.
1 If the vehicle is moving, it is only necessary to turn the start knob clockwise to start the engine.

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379
Location of the backup reader in the tunnel console.
NOTE
When the remote key is placed in the backup reader, make sure that no othervehicle keys, metal objects or electronicdevices (e.g. cellular phones, tablets, lap-tops or chargers) are in the backup reader.Multiple vehicle keys close to each other inthe backup reader can disrupt their func-tionality.
CAUTION
If the engine has not responded after 3 attempts – wait for 3 minutes before star-ting a new attempt. Starting capabilityincreases if the starter battery is given timeto recover.
WARNING
Never remove the remote control key from
the vehicle while driving or the vehicle is being towed.
WARNING
Always remove the remote key from the passenger compartment when youleave the vehicle and make sure theignition is in mode
0.
Always put the gear selector in
P and
apply the parking brake before leavingthe vehicle. Never leave the vehicleunsupervised while the engine is run-ning.
Always open the garage door fully andmake sure that ventilation is very goodbefore starting the engine in a garage.The exhaust fumes produced by thevehicle contain carbon monoxide,which is invisible and odorless but verytoxic.
CAUTION
When starting in cold weather, the automatic transmission may shift up atslightly higher engine speeds than nor-mal until the automatic transmissionfluid reaches normal operating tem-perature.
Do not race a cold engine immediatelyafter starting. This could prevent fluidsfrom properly lubricating vital compo-nents in the engine before it hasreached the proper operating tempera-ture.
The engine should be idling when thegear selector is moved. Never acceler-ate until the gear is fully engaged.Accelerating rapidly before a gear isproperly engaged could lead to harderwear of components.
To help prevent the transmission oilfrom overheating, select
P or N when
idling at a standstill for prolonged peri-ods of time.

STARTING AND DRIVING
382
Selecting ignition modeThe vehicle's ignition can be put in various modes (levels) to make different functionsavailable.
Selecting an ignition mode
Start knob in the tunnel console.
Ignition mode 0
– Unlock the vehicle and
keep the remote key in the passenger compartment.
NOTE
To set level I or II without engine start –
do not depress the brake pedal (or clutch
pedal for vehicles with manual transmis- sion) when selecting this ignition mode.
Ignition mode I
– Turn the start knob
clockwise and release it. The control will automatically return to the original posi- tion.
Ignition mode II
– Turn the start knob
clockwise and hold it there forapprox. 5 seconds. Release the knob,which will automatically return to its origi-nal position.
Back to ignition mode 0
– To return to
ignition mode 0 from modes I and II, turn
the start knob clockwise and release it.The control will automatically return to theoriginal position.
Related information
Starting the vehicle (p. 378)
Switching off the vehicle (p. 380)
Ignition modes (p. 381)
Adjusting the steering wheel (p. 193)
Jump starting using another battery(p. 420)
Brake functions
The vehicle's brakes are used to reduce speed or prevent the vehicle from rolling.
In addition to the wheel brakes and parking brakes, the vehicle is also equipped with anumber of automatic brake assist functions.These systems provide assistance by e.g. thedriver not needing to depress the brake pedalat a traffic light or when starting up a hill. Depending on how the vehicle is equipped, the following brake assist functions may beincluded:
Auto-hold brake function at a standstill(Auto Hold)
Hill Start Assist (Hill Start Assist)
Braking assist after a collision
City Safety
Related information
Brakes (p. 383)
Parking brake (p. 385)
Auto-hold brakes (p. 389)
Braking assist after a collision (p. 391)
Hill Start Assist (p. 390)
City Safety
™ (p. 312)

STARTING AND DRIVING
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383
Brakes
The brake pedal is used to apply the vehicle's regular brakes, which are part of the brakesystem.
The vehicle is equipped with two brake cir- cuits. If one brake circuit is damaged, thebrake pedal will go down further whendepressed. More pressure will then berequired from the driver for normal brakingeffect. The driver's pressure on the brake pedal is enhanced by a power braking function.
WARNING
Power braking only functions if the engine is running.
If the brake pedal is used when the engine is turned off, the pedal will feel stiffer than usualand greater pressure must be applied to brakethe vehicle. In very hilly areas or when driving with a heavy load, manual gear shifting can be used to aug-ment the brakes with engine braking. Enginebraking is most effective if the same gear isused both uphill and downhill.
Anti-lock brakesThe vehicle is equipped with an Anti-lock Braking System (ABS 2
), which helps prevent
the wheels from locking and helps maintain steering control when braking. Vibrations maybe felt from the brake pedal when ABS isoperating, which is normal. After the vehicle is started, a brief test of the ABS system is automatically performed whenthe driver releases the brake pedal. An addi-tional automatic test of the system may beperformed when the vehicle is traveling at alow speed. During the test, the brake pedalmay feel as though it is pulsating.Symbols in the instrument panel
Symbol Meaning
A
B Check the brake fluid level. If the level is low, fill brake fluid andcheck to determine the reasonfor the loss of brake fluid.
A
BSteady glow for 2 seconds after the engine is started: Automaticfunction check. Steady glow for more than 2 seconds: Fault in the ABS sys-tem. The vehicle's regular brakesystem is still working, but with-out the ABS function.
A
In Canada.
B In the US.
2Anti-lock Braking System

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STARTING AND DRIVING
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WARNING
If the warning symbols for both brake fault and ABS fault are lit simultaneously, theremay be a fault in the brake system.
If the brake fluid reservoir level is nor- mal when this occurs, drive carefully tothe nearest workshop to have thebrake system checked - an authorizedVolvo workshop is recommended.
If the brake fluid has fallen below theMIN
level in the brake fluid reservoir,
the vehicle should not be driven untilthe brake fluid has been filled. The rea-son for the brake fluid loss must bechecked.
Related information
Brake Assist System (p. 384)
Auto-hold brakes (p. 389)
Hill Start Assist (p. 390)
Braking on wet roads (p. 384)
Braking on salted roads (p. 385)
Maintenance of the brake system(p. 385)
Brake lights (p. 157)
Brake Assist System The brake enhancing system, (BAS 3
), helps
increase braking force and can thereby reduce braking distance.
The system monitors the driver's braking hab- its and increases braking force when neces-sary. Braking force can be increased up to thepoint at which the ABS intervenes. The func-tion is deactivated when pressure on the brakepedal is decreased.
NOTE
When BAS is activated, the brake pedal will go down slightly more than usual.Press (hold) down the brake pedal as longas necessary. When the brake pedal is released, all brak- ing ceases.
Related information
Brakes (p. 383)
Braking on wet roads
Prolonged driving in heavy rain without brak- ing may cause braking effect to be slightlydelayed the first time the brakes are applied.
This may also occur after washing the vehicle. It will then be necessary to apply greater pres-sure to the brake pedal. You should thereforemaintain a greater distance to the vehicleahead. Firmly apply the brakes after washing the vehicle or driving on wet roads. This helpswarm up the brake discs, enabling them to drymore quickly and protecting them against cor-rosion. Consider the current traffic situationwhen braking.
Related information
Brakes (p. 383)
Braking on salted roads (p. 385)
3
Brake Assist System

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385
Braking on salted roads
When driving on salted roads, a layer of salt may form on the brake discs and brake pads.
This could increase stopping distance. Main- tain an extra large safety distance to the vehi-cle ahead. Make sure to also:
Apply the brakes from time to time to helpremove salt. Make sure braking does notpose a risk to any other road users.
Gently apply the brakes when you havefinished driving and before driving again.
Related information
Brakes (p. 383)
Braking on wet roads (p. 384)
Maintenance of the brake system
Regularly check the brake system compo- nents for wear.
To keep the vehicle as safe and reliable as possible, follow the Volvo service schedulespecified in the Warranty and MaintenanceRecords Information booklet. After replacingbrake pads and brake discs, braking effect isnot adapted until they are "broken in" by driv-ing a few hundred kilometers (miles). Com-pensate for the reduced braking effect byapplying greater pressure to the brake pedal.Volvo recommends only using brake padsapproved for your Volvo.
CAUTION
The brake system's components should be regularly checked for wear. Contact a workshop for advice on how to do this or let a workshop perform theinspection - an authorized Volvo workshopis recommended.
Related information
Brakes (p. 383)
Parking brake
The parking brake helps keep the vehicle sta- tionary by mechanically locking two wheels.
The parking brake controls are located in the tunnel console between the seats.
When the electric parking brake is being applied, a faint sound can be heard from thebrake's electric motor. This sound can also beheard during the automatic function check ofthe parking brake. If the vehicle is stationary when the parking brake is activated, it will only be applied to therear wheels. If it is activated while the vehicleis moving, the normal brakes will be used onall four wheels. Braking will be transferred toonly the rear wheels when the vehicle isalmost stopped.

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Related information
Activating and deactivating the parking brake (p. 386)
Parking on a hill (p. 388)
Parking brake malfunction (p. 388)
Auto-hold brakes (p. 389)
Activating and deactivating the parking brake
Use the parking brake to help keep the vehi- cle stationary when it is parked.
Activating the parking brake
1. Pull up the control.
> The symbol in the instrument panel willilluminate when the parking brake is activated.
2. Make sure the vehicle is stationary.
Symbol in the instrument panel
Symbol Meaning
A
B The symbol will be illuminated when the parking brake is acti-vated. A flashing symbol indicates that a fault has been detected. Readthe message in the instrumentpanel.
A
Canadian models.
B US models.
Automatic activation
The parking brake is applied automatically when the ignition is switched off and the setting for automatically activating theparking brake is activated in the centerdisplay.
when the gear selector is moved to
P on a
steep hill.
if the auto-hold brake (automatic brake atstandstill) function is activated and
the vehicle has been stationary for aprolonged period of time (5-10minutes).
the vehicle is switched off.
the driver has left the vehicle.