brake sensor VOLVO XC90 TWIN ENGINE HYBRID 2017 Owner's Manual

DRIVER SUPPORT
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327

WARNING
Warnings will only be provided if there is animminent risk of a collision taking place. Thedriver should be aware of the system's limita-tions before operating the vehicle.
Warnings and automatic braking for pedes-trians and cyclists are deactivated at speedsabove approx. 43 mph (70 km/h).
City Safety's auto-brake function can helpprevent a collision or reduce the speed atwhich a collision occurs. However, the drivershould always apply the brakes, even if auto-brake is operating.
The driver is always responsible for maintain-ing the correct speed and distance in relationto the vehicle ahead. Never wait for a collisionwarning or for City Safety to intervene.
City Safety does not activate the auto-brakefunction during fast acceleration.
City Safety maintenance may only be carriedout by a trained and qualified Volvo servicetechnician.
Function overview
Audio-visual collision warning
Distance monitoring by a camera and radarsensor
When triggered, City Safety carries out threesteps in the following order:
1.Collision warning
2.Brake assistance
3.Auto-brake

1: Collision warning
The driver is first alerted to the risk of an immi-nent collision.
City Safety can detect pedestrians, cyclists orvehicles that are stationary, are moving in thesame direction as your vehicle or are in your vehi-cle's path.
City Safety can also detect pedestrians, large ani-mals or cyclists that are crossing in front of yourvehicle.
If there is a risk of a collision with a pedestrian,cyclist, large animal or a vehicle, as well as vehi-cles described in the article "City Safety in cross-ing traffic," the driver will be alerted by a flashingred warning signal, an audible signal and a hapticwarning in the form of pulsations in the brakepedal. At lower speeds, during hard braking or ifthe accelerator pedal is pressed, the haptic warn-ing will not be given.
2: Brake assistance
If the risk of a collision increases, brake supportwill be activated.
This function increases pressure on the brakepedal if the driver does not apply enough pres-sure to the pedal.

3: Auto-brake
The brakes will be applied automatically.
If the driver has not taken action at this stage anda collision is imminent, auto-braking will be trig-gered. Full braking effect will be used to avoidthe collision if possible or to make the speed atthe point of impact as low as possible.
In certain situations, auto-braking may begin withlimited effect before full braking is used.
If City Safety has prevented a collision, the vehi-cle will be kept at a standstill until the driver

DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.359

Side park assist
The system's side sensors are activated automat-ically when the engine is started and are active atspeeds below approximately 6 mph (10 km/h).
The distance monitored along the sides of thevehicle is approximately 1 ft (30 cm). The audiblesignal comes from the side speakers.
Front park assist
The system's front sensors are activated auto-matically when the engine is started and areactive at speeds below approximately 6 mph(10 km/h).
The distance monitored in front of the vehicle isapproximately 2.5 ft (80 cm). The audible signalcomes from the front speakers.
Front Park Assist is deactivated if the parkingbrake is applied or if the gear selector is put in P.
When installing auxiliary headlights, be sure thatthey do not obstruct the front sensors. Otherwise,these lights could trigger a Park Assist warning.

Related information
•Activating/deactivating Park Assist (p. 359)
•Park Assist limitations (p. 360)
•Park assist symbols and messages (p. 361)
Activating/deactivating Park Assist
The Park Assist system can be turned on or off.
On/Off
Park Assist's front and side sensors are activatedautomatically when the engine is started. Therear sensors activate if the vehicle rolls rearwardin N or if R is selected.
This function can be activated/deactivated in the center dis-play's Function view.
–Tap the Park Assist button.
>Green indicator: the function is active.Gray indicator: the function is deactivated.

Related information
•Park Assist* (p. 358)
•Park Assist limitations (p. 360)
•Park assist symbols and messages (p. 361)

DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.360
Park Assist limitations
The Park Assist system has certain limitations.

NOTE
A trailer hitch whose wiring is integrated withthe vehicle's electrical system will be takeninto account when measuring the availablespace behind the vehicle.
NOTE
•The system will not detect high objects,such as a loading dock, etc.
•Certain materials or fabrics may not bedetected by the sensors. Objects made ofthese materials or people wearing cloth-ing made of these fabrics may not bedetected.
•Children or animals near the vehicle maynot always be detected.
•Objects such as chains, thin shiny polesor low objects may temporarily not bedetected by the system. This may resultin the pulsing tone unexpectedly stoppinginstead of changing to a constant tone asthe vehicle approaches the object. Insuch cases, use caution when backing upor stop the vehicle to help avoid damage.
•In certain circumstances, the park assistsystem may give unexpected warning sig-nals that can be caused by externalsound sources that use the same ultra-sound frequencies as the system. Thismay include such things as the horns ofother vehicles, wet tires on asphalt, pneu-matic brakes, motorcycle exhaust pipes,other vehicles with similar ultrasound sys-tems, etc. This does not indicate a fault inthe system.
Cleaning the sensors
Location of the Park Assist sensors
The sensors must be cleaned regularly to ensurethat they work properly. Clean them with waterand a suitable car washing detergent.

NOTE
If the sensors are obstructed by e.g., dirt,snow, or ice, this could result in false warningsignals from the park assist system or thesystem may not function at all.

Related information
•Park Assist* (p. 358)
•Activating/deactivating Park Assist (p. 359)
•Park assist symbols and messages (p. 361)

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STARTING AND DRIVING
* Option/accessory, for more information, see Introduction.378

Instrument panel symbols
SymbolExplanation
A
B
Red symbol: Check the brake fluidlevel. If the level is low, top up andhave the system inspected todetermine the cause of the loss offluid.
Yellow symbol: there is a fault inthe brake pedal sensor.
A
B
Steady glow for more than2 seconds: there is a fault in theABS system. The normal brakesystem will still function but with-out ABS brake modulation.
If Brake pedalCharacteristicschanged Service required isdisplayed, the Brake-by-Wire sys-tem is not functioning properly.The brake pedal must be pressedfarther down and with more pres-sure for braking effect.
AUS modelsBCanadian models

WARNING
If both symbols illuminate at the same timeand the brake level is below the MIN mark inthe reservoir or if a brake system-related mes-sage is shown in the instrument panel: DONOT DRIVE. Have the vehicle towed to atrained and qualified Volvo service technicianand have the brake system inspected.
If both symbols illuminate at the same timeand the brake level is normal (not below theMIN mark in the reservoir) or if a brake sys-tem-related message is shown in the instru-ment panel: drive the vehicle carefully to anauthorized Volvo workshop and have thebrake system inspected by a trained andqualified Volvo service technician.

Related information
•Brake functions (p. 378)
•Brake assist system (p. 379)
•Emergency brake lights (p. 380)
•General information about the XC90 T8 TwinEngine Plug-in Hybrid (p. 16)
Brake functions
The vehicle's standard braking features are aug-mented by a number of auxiliary help functions.
In addition to the wheel brakes and the parkingbrake, the vehicle is equipped with several auto-matic brake assist functions. These systems helpthe driver by e.g., keeping the vehicle stationarywhen the brake pedal is not depressed (at a traf-fic light or intersection), when starting up a hill orwhen driving down a hill.
These systems include:
•Auto-hold brakes
•Hill Start Assist
•Braking assist after a collision
•Hill Descent Control*

Related information
•Brakes (p. 376)
•Parking brake (p. 382)
•Hill Descent Control (HDC) (p. 380)
•Auto-hold brake function (p. 379)

MAINTENANCE AND SERVICING
}}
* Option/accessory, for more information, see Introduction.521
Function[A]
Horn20
Alarm siren*5
Brake system control module(valves, parking brake)40
Windshield wipers30
Tailgate window washer25
Heated windshield*, passengerside40
––
Brake system control module(ABS pump)40
––
Heated windshield*, passengersideShunt
Feed when ignition is switchedon to: engine control module,transmission components, elec-trical power steering, centralelectrical module
5
Exterior vehicle sound (certainmarkets)5
Passenger side headlight7,5
Function[A]
––
––
––
Air bags; Occupant Weight Sen-sor (OWS)5
Driver side headlight7.5
Accelerator pedal sensor5
Transmission control module;Gear selector control module15
Engine control module5
––
––
––
––
Engine control module; Actuator;Turbo-charger valve20
Solenoids; Valves; Engine cool-ing system thermostat10
Vacuum regulators; Valve7.5
Function[A]
Spoiler shutter control module;Radiator shutter control module;Fuel leakage detection
5
––
Heated oxygen sensors (frontand rear)15
Oil pump solenoid; A/C mag-netic coupling; heated oxygensensor (center)
15
––
Engine control module20
Ignition coils; Spark plugs15
––
––
Transmission oil pump controlmodule30
Vacuum pump control module40
Transmission actuator25
––

MAINTENANCE AND SERVICING
}}
* Option/accessory, for more information, see Introduction.525

Positions
•Fuses 1, 3–21, 23–36, 39–53 and 55–59are called "Micro".
•Fuses 2, 22, 37–38 and 54 are called"MCase" and should only be replaced by atrained and qualified Volvo service technician.
FunctionA
––
120-volt socket between the rearseats30
––
Alarm system movement sensorA5
Media player5
Instrument panel5
Center console buttons5
Sun sensor5
––
––
Steering wheel module5
Module for start knob and parkingbrake5
FunctionA
Heated steering wheel* module15
––
––
––
––
Climate system control module10
––
On-board diagnostics (OBDII)10
Center display5
Climate system blower module(front)40
––
FunctionA
Instrument lighting; Courtesy light-ing; Rearview mirror auto-dim func-tion; Rain and light sensor; Reartunnel console keypad*; Powerfront seats*
Instrument lighting; Courtesy light-ing; Rearview mirror auto-dim func-tion; Rain and light sensor; Rear
tunnel console keypad*B; Power
front seats*; Power rear seatsC;Display for rear seat conveniencefunctions*; Rear seat massagefunction*
7.5
Control module for driver supportfunctions5
Panorama roof and sun shade*20
Head-up display*5
Courtesy lighting5
––
Ceiling console display (seat beltreminder, front passenger side air-bag indicator)
5
––
Humidity sensor5

MAINTENANCE AND SERVICING
549

CAUTION
When using an automatic car wash in whichthe vehicle has to be able to roll freely, theauto-hold brake function must be deactivated.If this is not done, the brakes will automati-cally be applied when the vehicle is stationary.
To deactivate this function:
1.Drive the vehicle into the car wash
2. Turn off the auto-hold function using thecontrol on the center console
3. Turn off the parking brake's automaticfunction in the center display's Top view
(tap Settings, tap My CarElectricParking Brake and deselect AutoActivate Parking Brake)
4.Put the gear selector in N
5.Switch off the ignition by turning the startknob to STOP and holding it in this posi-tion for at least 4 seconds
The vehicle will then be able to roll freely.
CAUTION
•Before driving into an automatic carwash, turn off the optional rain sensor toavoid damaging the windshield wipers.
•Make sure that side view mirrors, auxiliarylamps, etc, are secure, and that anyantenna(s) are retracted or removed. Oth-erwise there is risk of the machine dis-lodging them.
•Chromed wheels: Clean chrome-platedwheels using the same detergents usedfor the body of the vehicle. Aggressivewheel-cleaning agents can permanentlystain chrome-plated wheels.

WARNING
•When the vehicle is driven immediatelyafter being washed, apply the brakes,including the parking brake, several timesin order to remove any moisture from thebrake linings.
•Engine cleaning agents should not beused when the engine is warm. This con-stitutes a fire risk.

Exterior components
Volvo recommends the use of special cleaningproducts, available at your Volvo retailer, forcleaning colored plastic, rubber, or ornamentalcomponents such as chromed strips on the exte-
rior of your vehicle. The instructions for usingthese products should be followed carefully. Sol-vents or stain removers should not be used.
CAUTION
•Avoid waxing or polishing plastic or rub-ber components
•Polishing chromed strips can wear awayor damage the surface
•Polishes containing abrasive substancesshould not be used

Related information
•Paint damage (p. 553)
•Corrosion protection (p. 552)
•Polishing and waxing (p. 554)
•Windshield wipers in the service position(p. 543)

INDEX
577
Owner's information
mobile applications 25
Owner's manual 21
Ownership, changing 120
Oxygen sensors, heated 394
P
Paint, touching up553, 554
Park assist358, 359, 360, 361
Park Assist Camera 362, 364, 366, 367
settings362, 366
Park Assist Pilot 368, 369, 372, 374
Parking brake
electric, applying/releasing 382, 384
Parking light bulb, replacing534
Passenger compartment
fuses523
Passive Entry system
location of antennas247
Permissible axle weight563
Phone
receiving calls452
text messages453, 454
Pilot Assist 289, 295, 298, 300, 301,
303, 304, 305, 308, 311, 312, 314, 315
Plug-in hybrid
general information16
Polishing554
Power front seat
memory function169
Power mirrors108
defroster206
Power steering
adjustable262
Power tailgate251
Power windows113
Preconditioning189, 191
starting/stopping194
symbols and messages195
timer192
Preconditioning,
retaining climate comfort191
Pregnancy, using seat belts during 64
PROPOSITION 65 WARNING395
R
Radar
driver support systems318, 322
Radar sensor
limitations 319
Radio
RBDS434
settings434
SiriusXM® Satellite radio 439, 440, 442
Radio functions
HD digital radio 436, 437, 438, 439
Rain sensor 162
Rear Collision Warning 338
Rear fog lights 150
Rear park assist 358, 359, 360, 361
Rear seat head restraints 175
Rear seats 175
accessing the third row 179
adjusting backrest tilt 177
center head restraint 175
folding 178, 179, 180
moving forward/rearward 176
Rearview mirror
compass 142, 143
Rear window defroster 206
Recalls 64
Recalls, child restraints 83
Recirculation (climate system) 205
Refrigerant (A/C system) 565
Refueling 391, 392
fuel filler door 393