brake sensor VOLVO XC90 TWIN ENGINE 2020 Owner's Manual

DRIVER SUPPORT
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* Option/accessory.371
Park Assist front, rear and sides *
Park Assist behaves differently depending on which part of the vehicle is approaching anobstacle.
Front camera
The warning signal has a continuous tone when the obstacle is less than approx. 30 cm (1 ft) from thevehicle.
The Park Assist system's front sensors are automatically activated when the engine isstarted. They are active at speedsbelow 10 km/h (6 mph). The distance monitored extends approx. 80 cm (2.5 ft) in front of the vehicle.
NOTE
The Park Assist system is deactivated when the parking brake is used or when P
is selected on vehicles with automatictransmission.
CAUTION
When installing auxiliary lights: Make sure these do not obscure the sensors – theauxiliary lights could be perceived as anobstacle.
Back
The warning signal has a continuous tone when the obstacle is less than approx. 30 cm (1 ft) from thevehicle.
The rear sensors will be activated if the vehicle begins rolling backward or if reverse gear isengaged. The distance monitored extends approx. 1.5 meters (5 ft) behind the vehicle. The Park Assist system's rear sensors will be automatically deactivated if the vehicle isbacking up with a trailer connected to thevehicle's electrical system.
NOTE
When reversing with e.g. a trailer or bike carrier on the trailer hitch – without Volvooriginal trailer cables – the Parking Assistsystem may have to be turned off manuallyto prevent the sensors from reacting tothese.

DRIVER SUPPORT
* Option/accessory.373
CAUTION
Objects such as chains, thin and glossy poles or low obstacles may end up in the"signal shadow" and then go temporarilyundetected by the sensors – the pulsatingtone may then unexpectedly stop insteadof becoming a constant tone as expected. The sensors cannot detect high objects, such as protruding ramps. In such situations, pay extra attention and maneuver/drive the vehicle veryslowly or stop the current parkingmaneuver – there may be a high risk ofdamage to the vehicle or other objectssince information from the sensors isnot always reliable in such situations.
CAUTION
In some circumstances, the Park Assist System may produce false warnings due toexternal sound sources with the sameultrasonic frequencies as those the systemworks with. Examples of such sources are horns, wet tires on asphalt, pneumatic brakes, exhaustnoise from motorcycles, etc.
NOTE
When a trailer hitch is configured with the vehicle electrical system, the trailer hitchprotrusion is included when the functionmeasures the distance to objects behindthe vehicle.
Related information

Park Assist
* (p. 370)

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DRIVER SUPPORT
* Option/accessory.
388
Positioning the vehicle in the parking space
Parallel parking positioning overview.
Perpendicular parking positioning overview.
1. Move the gear selector to the gear instruc-
ted by the system. Wait until the steering wheel turns and then drive slowly forward.
2. Be prepared to stop the vehicle when instructed to do so by a graphic and mes-sage in the center display.
3. Engage reverse gear and back up slowly.
4. Be prepared to apply the brakes when instructed to do so by a graphic and mes- sage in the center display.
The function will switch off automatically anda graphic and message will appear to indicatethat parking has been completed. Adjust-ments can always be made be the driver after-ward. Only the driver can determine when thevehicle is correctly parked.
CAUTION
The warning distance is shorter when the sensors are used by Park Assist Pilot (PAP 103
) compared to when they are used
by the Parking Assist system.
Auto-brake during a parking sequenceIf, while parking, the parking sensors detect a vehicle or pedestrian in the vehicle's intendeddirection of travel behind or in front of the vehicle, the auto-brake function will bring thevehicle to a standstill. A pop-up message will then appear in the instrument panel and the driver can tap
Cancel to cancel the parking sequence orResume to continue the parking sequence.
After selecting
Resume:
–Check that the area around the vehicle is free of obstructions and follow the instruc-tions on the center display, such as:
To continue – Gently accelerate away
from object.
Related information
Park Assist Pilot
* (p. 384)
Park Assist Pilot
* limitations (p. 389)
103
Park Assist Pilot

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DRIVER SUPPORT
390
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.
when, while parking, the parking sensorsdetect a vehicle or pedestrian in the vehi-cle's intended direction of travel behind orin front of the vehicle, the auto-brake func-tion will bring the vehicle to a standstill.
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.
NOTE
Dirt, ice and snow covering the sensors reduce their function and can make meas-urement impossible.
Driver responsibilityThe driver should keep in mind that the func- tion is a parking aid ‒
not an infallible fully
automatic system. The driver must always beprepared to take control and cancel a parkingsequence if necessary. There are a number of things to keep in mindwhen parking, including:
The driver is always responsible for deter-mining if the space suggested by the func-tion is suitable for parking.
Do not use the function when using snowchains or a temporary spare tire.
Do not use the function if there are anyobjects protruding from the vehicle.
Heavy rain or snowfall may inhibit PAP'sability to accurately measure a parkingspace.
While searching and measuring the park-ing space, the function may be unable todetect objects located far into the space.
PAP may not suggest parking spaces onnarrow streets if it does not detect suffi-cient space for maneuvering the vehicle.
Use approved tires 105
inflated to the cor-
rect tire pressure because this affects thefunction's ability to provide parking assis-tance.
The function is based on the way the vehi-cles are parked behind and in front of yourparking space. If they are, for example,parked too close to the curb, there is a riskthat your vehicle's tires or wheel rims
105
"Approved tires" refers to tires of the same type and make as the vehicle's original, factory-installed tires.

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STARTING AND DRIVING
418be felt from the brake pedal when ABS is operating, 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.
Light braking charges the hybrid
battery
When the brakes are applied lightly, the elec-tric motor braking function is used. This con-verts the vehicle's kinetic energy into electricalenergy, which is used to charge the hybridbattery. When the battery is being chargedwith the electric motor braking function, thiswill be indicated in the instrument panel.When the battery is being charged with the electric motor braking function, this will be indicated in theinstrument panel.
This function is active at speeds in the range of 150-5 km/h (93-3 mph). When braking atspeeds outside of this range, or during harderbraking, the hydraulic braking system is usedto augment braking. This is indicated in theinstrument panel with the pointer down in thered area.
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
BFault in pedal sensor.
2
Anti-lock Braking System

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MAINTENANCE AND SERVICE
* Option/accessory.
630
Function Ampere Type
Medium voltage module 10 Micro
– –
MCaseA
–
– Micro
Movement sensor* 5 Micro
Media player
5 Micro
Instrument panel5 Micro
Center console buttons5 Micro
Sun sensor5 Micro
–– Micro
–– Micro
Steering wheel module 5 Micro
Module for start knob and parking brake controls5 Micro
Heated steering wheel* module 15 Micro
–
– Micro
–– Micro
–– Micro
–– Micro

MAINTENANCE AND SERVICE
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* Option/accessory.647
Automatic car washes
The vehicle should be washed as soon as it becomes dirty. The longer the dirt remains,the more difficult it will be to keep the vehicleclean. It could also lead to paint damage.
Washing your vehicle in an automatic car wash is a fast and easy way to keep your vehi-cle clean, but it does not reach all areas of thevehicle. Volvo recommends washing yourvehicle by hand or supplementing automaticcar washes with a hand wash.
NOTE
Volvo recommends not washing the vehi- cle in an automatic car wash during thefirst few months; the paintwork on newvehicles takes some time to fully harden.
CAUTION
Before driving the vehicle into a car wash, deactivate the Automatic Braking whenStationary and Automatic Parking BrakeApplication functions. If the functions arenot deactivated, the brake system willseize when the vehicle is stationary and thevehicle will not be able to roll.
CAUTION
For automatic car washes in which the vehicle is pulled forward on rolling wheels:
1. Before washing the vehicle, make sure that the automatic rain sensor is deac- tivated. If it is not deactivated andinadvertently starts, the wiper armscould be damaged.
2. To help prevent damage from the auto- matic car wash machinery, make surethat the door mirrors are folded in,antennas retracted or removed, andany auxiliary lights secured.
3. Drive into the automatic car wash.
4. Turn off the "Automatic Braking when Stationary" function using the
but-
ton in the tunnel console.
5. Turn off the "Automatic Parking Brake Application" function in the center dis- play's Top view.
6. Turn off the engine by turning the start knob in the tunnel console clockwise.Hold the knob in position for at least2 seconds.
The vehicle is now ready for the automaticcar wash.
CAUTION
The system will automatically change to P
mode if the above steps are not followed. In P mode, the wheels are locked, which
they should not be when the vehicle isbeing washed in a car wash.
NOTE
Keep in mind that if the vehicle is equipped with the keyless locking and unlocking function *, the doors and tailgate/trunk lid
may open when washing the vehicle if the remote key is within range.
Related information
Cleaning the exterior (p. 644)
Polishing and waxing (p. 644)
Hand washing (p. 645)
High-pressure washing (p. 648)
Cleaning the wiper blades (p. 648)
Cleaning exterior plastic, rubber and trim components (p. 649)
Cleaning rims (p. 650)
Corrosion protection (p. 650)
Auto-hold brakes (p. 424)

INDEX
674Automatic relocking 248, 262
Automatic transmission 427, 428
kickdown 431
oil 670
Trailer 465
Auxiliary heater 240
B
Backrest front seat, adjusting 188, 189, 192, 193 , 194, 195
rear seat, adjusting 202, 203
rear seat, folding 198, 203, 204
Battery Hybrid 617
jump-start 459
Maintenance 613
recycling 618
start 613
symbols on the battery 618
BLIS 342 activating/deactivating 343
limitations 344
Symbols and messages 345
Bloweradjusting 227, 228
air distribution 214
air vents 215
Bluetooth connect 505
connecting vehicle to Internet 525
phone 515
settings 523
Book service and repair 601
Booster cushions 74 Brake assist after collision 426
Brake energy 418, 432Brake fluid grade 670
Brake functions 417
Brake position 428
Brakes 417 anti-lock brakes, ABS 417
automatic when stationary 424
Brake Assist System, BAS 419
brake lights 164
brake system 417
emergency brake lights 164
Maintenance 420
on salted roads 420on wet roads 420
parking brake 421
brake system fluid 670
C
Camera sensor
see Camera 321
Camera unit 321 limitations 322
maintenance and cleaning 326
Capacity weight 574, 665
Cargo compartment 584 attachment points 587
cargo net 592
electrical outlet 580, 582
Lighting 167
Cargo compartment cover 588
cargo net 592
Cargo net 592
Car wash 644, 645, 647, 648, 649, 650
Catalytic converter 457 recovery 469
CD player 503
Cell phone, see Phone 516