2017 VOLVO XC90 wheel hub

SAFETY
66
Driver/passenger side airbags
The front airbags supplement the three-point seat belts. For these airbags to provide the pro-tection intended, seat belts must be worn at alltimes.
Driver and passenger side front airbags
The front airbag systemThe front airbag system includes gas generators surrounded by the airbags, and deceleration sen-sors that activate the gas generators, causing theairbags to be inflated with nitrogen gas. As the movement of the seats' occupants com- presses the airbags, some of the gas is expelledat a controlled rate to provide better cushioning.Both seat belt pretensioners also deploy, mini-mizing seat belt slack. The entire process, includ-ing inflation and deflation of the airbags, takesapproximately one fifth of a second. The location of the front airbags is indicated by SRS AIRBAG
embossed on the steering wheel
pad and above the glove compartment, and by decals on both sun visors and on the front andfar right side of the dash. The driver's side front airbag is folded and
located in the steering wheel hub.The knee airbag is folded on the underside of
the dashboard on the driver's side. The text AIRBAG is embossed on the panel.
The passenger's side front airbag is folded
behind a panel located above the glove compart- ment.
WARNING
• The airbags in the vehicle are designed to be a SUPPLEMENT to–not a replace-ment for–the three-point seat belts. Formaximum protection, wear seat belts at alltimes. Be aware that no system can pre-vent all possible injuries that may occur inan accident.
• Never drive with your hands on the steer-ing wheel pad/airbag housing.
• The front airbags are designed to helpprevent serious injury. Deployment occursvery quickly and with considerable force.During normal deployment and depend-ing on variables such as seating position,one may experience abrasions, bruises,swellings, or other injuries as a resultfrom deployment of one or both of theairbags.
• When installing any accessory equipment,make sure that the front airbag system isnot damaged. Any interference in the sys-tem could cause malfunction.
Front airbag deployment
•The front airbags are designed to deploy dur-ing certain frontal or front-angular collisions,impacts, or decelerations, depending on thecrash severity, angle, speed and objectimpacted. The airbags may also deploy in

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INSTRUMENTS AND CONTROLS
* Option/accessory.
160
Tailgate wiper and reverse gear1.
In the center display, select SettingsMy
Car
Wipers.
2. Activate/deactivate by selecting/deselecting the
Auto Rear Wiper box.
If the windshield wipers are on and the transmis- sion is put into reverse gear, the tailgate wiperwill start. This function is deactivated when a dif-ferent gear is selected.
Related information
• Using the windshield wipers (p. 157)
• Windshield and headlight washers (p. 158)
• Refilling the windshield washer fluid reservoir(p. 521)
• Activating/deactivating the rain sensor(p. 157)
Steering wheel The steering wheel has controls for the horn, certain optional driver support systems, menus/messages and paddles for manually shifting gears
*.
Steering wheel keypads and paddles *
Driver support system controls16
Paddles for manually shifting gears
*
Keypad for voice controls, adjusting the head-up display*accessing menus and mes-
sages, and handling phone calls
Horn
The horn is located in the steering wheel hub.
Related information
• Adjusting the steering wheel (p. 161)
• Turning steering wheel heating
* on and off
(p. 197)
• Cruise Control (CC) (p. 262)
• Speed limiter (SL)
* (p. 255)
• Adaptive Cruise Control (ACC)
* (p. 269)
• Distance Alert
* (p. 267)
• Pilot Assist
* (p. 283)
• Steering wheel paddles
* (p. 396)
• Voice control (p. 119)
• Head-up display (HUD)
* (p. 116)
16
Cruise control *, Speed limiter *, Adaptive cruise control *, Distance alert * and Pilot Assist *.

STARTING AND DRIVING
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* Option/accessory.355
Driving on wet or salted roadsProlonged driving on wet or salted roads can affect brake function and increase stopping dis-tance. Be sure to keep a safe distance to thevehicle ahead when driving under these condi-tions.
Brake pad inspection
On vehicles equipped with a jack *, the condition
of the brake pads can be checked by raising thevehicle and performing a visual inspection of thebrake pads.
WARNING
• If the vehicle has been driven immediately prior to a brake pad inspection, the wheelhub, brake components, etc., will be veryhot. Allow time for these components tocool before carrying out the inspection.
• Apply the parking brake and put the gear selector in the Park (
P) position.
• Block the wheels standing on the ground, use rigid wooden blocks or large stones.
WARNING
•
Use the jack intended for the vehicle when changing a tire. For any other job,use stands to support the vehicle.
• The jack should be kept well-greased andclean, and should not be damaged.
• Be sure the jack is on a firm, level, non-slippery surface.
• No objects should be placed between thebase of jack and the ground, or betweenthe jack and the attachment bar on thevehicle.
• The jack must correctly engage the jackattachment.
• Never allow any part of your body to beextended under a vehicle supported by ajack.
Instrument panel symbols
Symbol
Explanation
A
BCheck the brake fluid level. If the level is low, top up and have thesystem inspected to determine thecause of the loss of fluid.
A
B
Steady glow for 2 seconds when the engine is started: automaticfunction control. Steady glow for more than 2 seconds: there is a fault in theABS system. The normal brakesystem will still function but with-out ABS brake modulation.
A
US models
B Canadian models

WHEELS AND TIRES
455
10.
Maximum Load : Indicates the maximum
load in pounds and kilograms that can be carried by the tire. Refer to the vehicle's tireinformation placard located on the B-Pillarfor the correct tire pressure for your vehicle.
11. Treadwear, Traction, and Temperaturegrades .
12. Maximum permissible inflation pressure: the greatest amount of air pressure that should ever be put in the tire. This limit is setby the tire manufacturer.
Speed SymbolA tire's Speed Symbol (SS) indicates the maxi-mum speed for which the tire has been certifiedand should be at least equivalent to the vehicle'stop speed. Winter tires, with our without studs, are excep- tions and may use a lower SS. When winter tiresare installed, the vehicle may not be driven fasterthan the tires' SS. The vehicle's speed should always be determined by the posted speed limit and traffic and roadconditions, not the tire's SS. The following table indicates the maximum per- missible speed for each SS.
Speed Symbol
M 81 mph (130 km/h)
Q 100 mph (160 km/h)
T 118 mph (190 km/h)
H 130 mph (210 km/h)
V 149 mph (240 km/h)
W 168 mph (270 km/h)
Y 186 mph (300 km/h)
WARNING
• The wheel and tire sizes for your Volvo are specified to meet stringent stabilityand handling requirements. Unapprovedwheel/tire size combinations can nega-tively affect your vehicle's stability andhandling.
• Any damage caused by installation ofunapproved wheel/tire size combinationswill not be covered by your new vehiclewarranty. Volvo assumes no responsibilityfor death, injury, or expenses that mayresult from such installations.
Wheel (rim) designations Wheel and rim dimensions are shown in the fol- lowing table.
The vehicle has been certified with certain combi- nations of wheels and tires. The following table shows an
example of wheel
dimensions: 8Jx18x42.5. This particular wheel may not be available on your vehicle.
8 Wheel width in inches
J Rim flange profile
18 Wheel diameter in inches
42.5 Offset in mm (distance from the center of the wheel to the wheel's contact sur- face on the hub)
Related information
•Tire sidewall designations (p. 454)

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WHEELS AND TIRES
4665.
Lug wrench and towing eyelet
Screw the towing eyelet into the lug wrench as shown in the illustration.
CAUTION
The towing eyelet must be screwed into the lug wrench as far as possible.
6. With the vehicle still on the ground, use the
lug wrench/towing eyelet to loosen the wheel bolts ½ – 1 turn by exerting downward(counterclockwise) pressure. 7. When hoisting the vehicle, it is essential that
the jack (or garage lift arms) are positionedcorrectly on the underside of the vehicle.There are two jack attachment points oneach side of the vehicle and there is a groovein the plastic cover at each attachment point.Position the jack under the attachment pointto be used on a level, firm, non-slippery sur-face and crank it up until it is correctlyaligned and seated in the attachment point.The pin on the jack's head must be posi-tioned in the hole in the attachment point.
8. Raise the vehicle until the wheel to bechanged is lifted off the ground. Remove the wheel bolts.
Related information
• Wheel bolts (p. 464)
• Installing a wheel (p. 466)
• Jack (p. 462)
Installing a wheel
It is important to install wheels properly.
1. Clean the contact surfaces on the wheel and hub.
2. Lift the wheel and place it on the hub.
3. Install the wheel bolts and tighten hand-tight. Using the lug wrench, tighten crosswise until all bolts are snug.
4. Lower the vehicle to the ground and alter- nately tighten the bolts crosswise to103 ft. lbs. (140 Nm).
5. Press the plastic covers onto the wheel bolts.