spare wheel VOLVO XC90 TWIN ENGINE HYBRID 2017 Owners Manual

WHEELS AND TIRES
487
of the factory-mounted tires on your vehicle, aswell as load limits and inflation pressure.

NOTE
•The placard shown indicates inflationpressure for the tires installed on thevehicle at the factory only.
•A certain amount of air seepage from thetires occurs naturally and tire pressurefluctuates with seasonal changes in tem-perature. Always check tire pressure reg-ularly.
•Use a tire gauge to check the tire inflation
pressure, including the spare4, at least oncea month and before long trips. You arestrongly urged to buy a reliable tire pressuregauge, as automatic service station gaugesmay be inaccurate.
•Use the recommended cold inflation pres-sure for optimum tire performance and wear.
•Under-inflation or over-inflation may causeuneven treadwear patterns.

Checking tire pressure
1. Remove the cap from the valve on one tire,then firmly press the tire gauge onto thevalve.
2. Add air to reach the recommended air pres-sure.
3. Replace the valve cap.
CAUTION
•After inflating the tires, always reinstall thevalve cap to help avoid damage to thevalve from dirt, gravel, etc.
•Use plastic valve caps only. Metal capscould corrode and become difficult toremove.
4. Visually inspect the tires to make sure thereare no nails or other objects embedded thatcould puncture the tire and cause an air leak.
5.Check the sidewalls to make sure there areno gouges, cuts, bulges or other irregulari-ties.
6. Repeat this procedure for each tire, includingthe spare.

NOTE
If you overfill the tire, release air by pushingon the metal stem in the center of the valve.Then recheck the pressure with your tiregauge.
Changing tires
When changing wheels to another dimension,always follow Volvo's instructions.
When changing to tires of another
dimension
If you mount tires with a dimension other thanthe factory-installed tires, contact an authorizedVolvo retailer to update the vehicle's software.This may also be necessary when changing fromsummer to winter tires, or vice versa.

Related information
•Snow tires and chains (p. 485)
•Installing a wheel (p. 491)
•Removing a wheel (p. 489)
4Not available in all models.

WHEELS AND TIRES
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491
Installing a wheel
It is important to install wheels properly.
1. Clean the contact surfaces on the wheel andhub.
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 untilall 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.

CAUTION
•After inflating the tires, always reinstallthe valve cap to help avoid damage to thevalve from dirt, gravel, etc.
•Use plastic valve caps only. Metal capscould corrode and become difficult toremove.

Related information
•Wheel bolts (p. 489)
•Jack (p. 488)
Tire Pressure Monitoring System(TPMS)
TPMS provides a warning if inflation pressure inone or more tires is too low. It also uses a sym-bol (called a telltale) that will flash for60 seconds and then glow steadily if there is asystem malfunction.
TPMS uses the rotational speed of the tires incombination with signal analysis of the ABS sen-sor signals to determine if they are properly infla-ted. When a tire is under-inflated, its diameter(and consequently also its rotational speed)changes. By comparing the individual tires witheach other it is possible to determine if one ormore tires are under inflated. If inflation pressureis too low, an indicator symbol will illuminate inthe instrument panel and a text message will bedisplayed.
SymbolExplanation
The symbol illuminates to indicatelow tire inflation pressure.
If a malfunction occurs in the sys-tem, the tire pressure warning sym-bol will flash for approximately1 minute and then remain illumi-nated.
Each tire, including the spare (if provided), shouldbe checked monthly when cold and inflated to