2020 VOLVO S90 TWIN ENGINE Owners Manual

WHEELS AND TIRES
* Option/accessory.527
Checking tire pressure
Correct inflation pressure helps improve driv- ing stability, save fuel and increase the serv-ice life of the tires.
Tire pressure decreases over time, which is normal. Tire pressure also varies depending onthe ambient temperature. Driving on under-inflated tires could cause the vehicle to over-heat and lead to damage. Tire pressure affectstraveling comfort, road noise and driving cha-racteristics. Check the pressure in the tires every month. Use the recommended inflation pressure forcold tires to help maintain good tire perform-ance. Under-inflated or over-inflated tirescould cause uneven tread wear. Use an air pressure gauge and check the infla- tion pressure on all the tires, including the spare tire 4
, at least once a month and before
long trips. Volvo recommends buying a relia- ble air pressure gauge, as the automaticgauges provided at service stations may beinaccurate.
WARNING
Under-inflation is the most common cause of tire failure and may result insevere tire cracking, tread separation,or "blow-out," with unexpected loss ofvehicle control and increased risk ofinjury.
Under-inflated tires reduce the loadcarrying capacity of your vehicle.
Cold tiresInflation pressure should be checked when thetires are cold. The tires are considered to becold when they have the same temperature asthe surrounding (ambient) air. This tempera-ture is normally reached after the vehicle hasbeen parked for at least 3 hours. After driving for approximately 1.6 km (1 mile), the tires are considered to be warm. If youneed to drive longer than that to inflate thetires, check and record the inflation pressureof the tires first and inflate accordingly whenyou arrive at the pump. When the ambient temperature changes, so does the inflation pressure. A 10-degree tem-perature drop causes a corresponding drop ininflation pressure of 1 psi (7 kPa). Check theinflation pressure of the tires regularly andadjust to the correct pressure, which can be found on the vehicle's tire information decal orcertification label. If you check inflation pressure when the tires are warm, you should never release air. Thetires become warm after driving and it is nor-mal for warm tires to have an inflation pres-sure above the recommended pressure forcold tires. A warm tire with an inflation pres-sure equal to or under the recommended pres-sure for cold tires could be significantly under-inflated.Related information

Adjusting tire pressure (p. 528)
Recommended tire pressure (p. 529)
Tire pressure monitoring system
*
(p. 529)
Tires (p. 520)
4
Not available in all models.

WHEELS AND TIRES
528
Adjusting tire pressureTire pressure decreases over time, which is normal. The tire pressure must therefore beadjusted to maintain the recommended tirepressure.
Use the recommended inflation pressure for cold tires to help maintain good tire perform-ance and even wear.
NOTE
To help prevent incorrect inflation pressure, pressure should be checked when the tiresare cold. The tires are considered to becold when they have reached the sametemperature as the ambient temperature(about 3 hours after the vehicle was lastdriven). After driving for a few kilometers,the tires will warm up and the pressure willincrease.
1. Remove the valve cap from the tire and press the air pressure gauge firmly onto the valve.
2. Inflate the tire to the correct inflation pres- sure; see the tire pressure placard on thedriver's side B pillar for recommendedpressures for factory-mounted tires. 3. Screw the valve cap back on.
NOTE

After inflating a tire, always replace the valve cap to help prevent valve damagecaused by gravel, dirt, etc.
Use plastic valve caps only. Metal capscould corrode and become difficult toremove.
4. Visually inspect the tire to make sure there
are no nails or other embedded objects that could puncture the tire and cause airleakage.
5. Check the sidewalls to make sure there are no gouges, cuts, bulges or other irreg-ularities.
6. Repeat this procedure for each tire, includ- ing the spare tire 5
.
NOTE
If you have overfilled the tire, release air by pushing on the metal stem in the center ofthe valve. Then recheck the pressure withyour tire gauge. Some spare tires require higher inflation pressure than the other tires. Consult thetire inflation pressure table or the inflationpressure decal.
Related information
Recommended tire pressure (p. 529)
Checking tire pressure (p. 527)
Inflate tires with the compressor included in the tire sealing system (p. 547)
Approved tire pressure (p. 634)
5
Not available on all models.

WHEELS AND TIRES
}}
* Option/accessory.529
Recommended tire pressure
The tire pressure placard on the driver's side B pillar (between the front and the rear door)indicates tire pressure for different loads andspeed conditions.
The decal specifies the designation for the fac- tory-mounted tires on the vehicle, as well asload limits and inflation pressures.
Related information
Checking tire pressure (p. 527)
Approved tire pressure (p. 634)
Tire pressure monitoring system
*
The tire pressure monitoring system 6
pro-
vides a warning symbol in the instrument panel if pressure is too low in one or moretires.
This symbol illuminates to indicate low inflation pressure. If there is a system malfunction, the inflation pressure warning symbol
will flash for approximately one minute andthen glow steadily.
System descriptionThe tire pressure monitoring system measures differences in rotational speed between thewheels through the ABS system to determineif the tires are properly inflated. If inflationpressure in a tire is too low, its diameter (andconsequently its rotational speed) changes. Bycomparing the tires with each other, the sys-tem can determine if the pressure in one ormore tires is too low.
General information about the tire pressure monitoring system
In the following description, the tire monitor- ing system is generally referred to as TPMS. Each tire, including the spare (if provided) 7
should be checked monthly when cold and inflated to the inflation pressure recom- mended by the vehicle manufacturer on thevehicle placard or tire inflation pressure label.(If your vehicle has tires of a different size thanthe size indicated on the vehicle placard or tireinflation pressure label, you should determinethe proper tire inflation pressure for thosetires.) As an added safety feature, your vehicle has been equipped with a tire pressure monitoringsystem (TPMS) that illuminates a low tirepressure telltale when one or more of yourtires is significantly under-inflated. Accord-ingly, when the low tire pressure telltale illumi-nates, you should stop and check your tires assoon as possible, and inflate them to theproper pressure. Driving on a significantly under-inflated tire causes the tire to overheat and can lead to tirefailure. Under-inflation also reduces fuel effi-ciency and tire tread life, and may affect thevehicle's handling and stopping ability. Pleasenote that the TPMS is not a substitute forproper tire maintenance, and it is the driver'sresponsibility to maintain correct tire pressure,even if under-inflation has not reached thelevel to trigger illumination of the TPMS lowtire pressure telltale. Your vehicle has also been equipped with a TPMS malfunction indicator to indicate when
6
Tire Pressure Monitoring System (TPMS)
7 Not available on all models.

||
WHEELS AND TIRES
* Option/accessory.
530 the system is not operating properly. The TPMS malfunction indicator is combined withthe low tire pressure telltale. When the systemdetects a malfunction, the telltale will flash forapproximately one minute and then remaincontinuously illuminated. This sequence willcontinue upon subsequent vehicle start-ups aslong as the malfunction exists. When the mal-function indicator is illuminated, the systemmay not be able to detect or signal low tirepressure as intended. TPMS malfunctions may occur for a variety of reasons, including the installation of replace-ment or alternate tires or wheels on the vehi-cle that prevent the TPMS from functioningproperly. Always check the TPMS malfunction telltale after replacing one or more tires or wheels onyour vehicle to ensure that the replacement oralternate tires and wheels allow the TPMS tocontinue to function properly.
Messages in the instrument panelIf tire pressure is too low, the low tire pressurewarning symbol is shown in the instrumentpanel along with a message. Check the infla- tion pressure in the
Car Status app in the
center display.
Tire pressure low Check Car Status
app in center display
Tire pressure system Temporarily
unavailable
Tire pressure system Service required
To keep in mind
Always save the new inflation pressure in the system after changing a tire or adjust-ing the inflation pressure.
If you switch to a tire of another size thanthe factory-mounted tires, the systemmust be reset by storing a new inflationpressure for these tires to avoid falsewarnings.
If a spare wheel 8
is used, it is possible that
the tire pressure monitoring system willnot work correctly due to the differencesbetween the wheels.
The system does not replace the need forregular tire inspection and maintenance.
It is not possible to deactivate the tirepressure monitoring system.
WARNING
Incorrect inflation pressure could lead to tire failure, which could cause thedriver to lose control of the vehicle.
The system cannot predict sudden tiredamage.
Related information
Recommended tire pressure (p. 529)
Viewing tire pressure status in the center display
* (p. 532)
Action when warned of low tire pressure (p. 533)
Saving a new inflation pressure in the monitoring system
* (p. 531)
8
Not available on all models.

WHEELS AND TIRES
* Option/accessory.531
Saving a new inflation pressure in the monitoring system *
In order for the tire pressure monitoring sys- tem 9
to function correctly, tire pressure refer-
ence values must be saved correctly. To help ensure that the system can correctly alert thedriver of low inflation pressure, this must bedone each time the tires are changed or theinflation pressure is adjusted.
For example, when driving with a heavy load or at high speeds (over 160 km/h (100 mph)),tire pressure should be adjusted to the Volvo-recommended tire pressure values. The sys-tem should then be reset by saving the newinflation pressure. To store the new inflation pressure as a refer- ence value in the system:
1. Switch off the ignition.
2. Inflate the tire to the correct inflation pres- sure; see the tire pressure placard on the driver's side B pillar for recommendedpressures for factory-mounted tires.
3. Start the vehicle. 4. Open the
Car Status app in App view.
5. Tap
TPMS.
NOTE
The vehicle must be stationary for theStore Pressure button to be selectable.
6.Tap Store Pressure.
7. Tap
OK to confirm that the tire pressure in
all four tires has been checked and adjusted.
8. Drive the vehicle until the new inflation pressure has been saved. The new infla-tion pressure is stored when the vehicle isdriven at speeds over 35 km/h (22 mph).
> When enough data has been collectedfor the system to detect low inflation pressure, the animation showing theprogress of the storing procedure willdisappear from the center display. Thesystem will not provide any further con-firmation that the new inflation pres-sure has been stored.
If storing cannot be performed,
Storing
pressure unsuccessful. Try again. will be
displayed. If the vehicle's ignition is switched off before the new inflation pressure has been saved, theprocedure must be performed again. To helpensure that the new inflation pressure is saved correctly, allow the storing procedure to com-plete during a single operating cycle.
WARNING
The exhaust gases contain carbon monox- ide, which is invisible and odorless but verypoisonous. The procedure for saving a newinflation pressure must therefore always beperformed outdoors or in a workshop withexhaust gas extraction.
Related information

Recommended tire pressure (p. 529)
Adjusting tire pressure (p. 528)
Viewing tire pressure status in the center display
* (p. 532)
Action when warned of low tire pressure (p. 533)
Tire pressure monitoring system
* (p. 529)
9
Tire Pressure Monitoring System (TPMS)

WHEELS AND TIRES
* Option/accessory.
532
Viewing tire pressure status in the center display *
With the system for tire pressure monitor- ing 10
, tire pressure status can be viewed in
the center display.
Checking statusThe vehicle may need to be driven for a few minutes at a speed above 35 km/h (22 mph)to activate the system. 1. Open the
Car Status app in App view.
2. Tap
TPMS to display the status of the
tires.
Status indicator light
The illustration is generic. Layout may vary depend- ing on vehicle model or software version.
Below are a few examples of messages that may be displayed for inflation pressure statusand what they mean.
Instrument panel: Tire
pressure low Check CarStatus app incenter displayThe indicator symbol will illuminate to indicate thatinflation pressure is lowin one or more tires. See the
Car Status app in
the center display for more information.
Instrument panel:
Tire
pressure sys- tem
Tempo-
rarily unavaila- ble
The indicator symbol will flash for about 1 minuteand then glow steadily.The system is temporarilyunavailable and will beactivated momentarily.
Instrument panel:
Tire
pressure sys- tem
Service
required
The indicator symbol will flash for about 1 minuteand then glow steadily. Ifthe system is not work-ing properly, contact a workshop A
.
A An authorized Volvo workshop is recommended.
Related information
Saving a new inflation pressure in the monitoring system
* (p. 531)
Action when warned of low tire pressure (p. 533)
Tire pressure monitoring system
* (p. 529)
Vehicle status (p. 567)
10
Tire Pressure Monitoring System (TPMS)

WHEELS AND TIRES
* Option/accessory.533
Action when warned of low tire pressure When the inflation pressure monitoring sys- tem11
detects low inflation pressure in a tire,
immediate action is required.
If the system's indicator symbol illu- minates and the message Tire
pressure low is displayed, check
the tire pressure and inflate if neces-
sary.
1. Switch off the ignition.
2. Check the inflation pressure on all four tires using a tire pressure gauge.
3. Inflate the tire to the correct inflation pres- sure; see the tire pressure placard on the driver's side B pillar for recommendedpressures for factory-mounted tires.
4. After the inflation pressure has been adjusted, always save the new inflationpressure in the system via the center dis-play. Please be aware that the indicator symbol will not go out until the low tire pressurehas been corrected and a storing proce-dure has been started for the new inflationpressure.
NOTE
To help prevent incorrect inflation pressure, pressure should be checked when the tiresare cold. The tires are considered to becold when they have reached the sametemperature as the ambient temperature(about 3 hours after the vehicle was lastdriven). After driving for a few kilometers,the tires will warm up and the pressure willincrease.
NOTE
After inflating a tire, always replace the valve cap to help prevent valve damagecaused by gravel, dirt, etc.
Use plastic valve caps only. Metal capscould corrode and become difficult toremove.
WARNING

Incorrect inflation pressure could lead to tire failure, which could cause thedriver to lose control of the vehicle.
The system cannot predict sudden tiredamage.
Related information
Recommended tire pressure (p. 529)
Adjusting tire pressure (p. 528)
Saving a new inflation pressure in the monitoring system
* (p. 531)
Viewing tire pressure status in the centerdisplay
* (p. 532)
Tire pressure monitoring system
* (p. 529)
Inflate tires with the compressor included in the tire sealing system (p. 547)
11
Tire Pressure Monitoring System (TPMS)

WHEELS AND TIRES
* Option/accessory.
534
When changing wheels
The wheels can be changed, e.g. to switch to snow tires or spare tires. Follow the applica-ble instructions for removing and installingthe wheel.
Changing to tires of another dimension
Make sure that the tire dimension is approved for use on the vehicle.
Related information
Removing a wheel (p. 536)
Installing a wheel (p. 538)
Tool kit (p. 534)
Snow tires (p. 541)
Spare wheel (p. 539)
Wheel bolts (p. 535)
Tool kit
Tools for e.g. towing or changing wheels are provided in the vehicle's trunk.
Jack *
Tool for removing the plastic wheel bolt covers
Funnel for refilling fluids
Wheel bolt key * and towing eyelet
The foam block under the cargo compartment floor contains the towing eyelet, the tire seal-ing system, the tool for removing plastic wheelbolt covers and the tool for removing the lock-ing wheel bolts. If the vehicle is equipped with a spare tire *12
, a
jack and lug wrench are provided.
Related information
When changing wheels (p. 534)
Jack
* (p. 535)
Tire sealing system (p. 542)
Attaching and removing the towing eyelet (p. 443)
12
Not available on all models.