2020 VOLVO XC90 TWIN ENGINE brake sensor

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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
}}
* 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