VOLVO S90 TWIN ENGINE 2019 Owners Manual

WHEELS AND TIRES
* Option/accessory.549
Checking tire pressure
Correct inflation pressure helps improve drivingstability, save fuel and increase the service life ofthe tires.
Tire pressure decreases over time, which is nor-mal. Tire pressure also varies depending on theambient temperature. Driving on under-inflatedtires could cause the vehicle to overheat and leadto damage. Tire pressure affects traveling com-fort, road noise and driving characteristics.
Check the pressure in the tires every month. Usethe recommended inflation pressure for cold tiresfor optimal tire performance and wear. Under-inflated or over-inflated tires could cause uneventread wear.
Use an air pressure gauge and check the infla-tion pressure on all the tires, including the spare
tire4, at least once a month and before long trips.Volvo strongly recommends buying a reliable airpressure gauge, as the automatic gauges provi-ded at service stations may be inaccurate.

WARNING
Under-inflation is the most commoncause of tire failure and may result insevere tire cracking, tread separation, or"blow-out," with unexpected loss of vehi-cle control and increased risk of injury.
Under-inflated tires reduce the load car-rying capacity of your vehicle.

Cold tires
Inflation pressure should be checked when thetires are cold.
The tires are considered to be cold when theyhave the same temperature as the surrounding(ambient) air.
This temperature is normally reached after thevehicle has been parked for at least 3 hours.
After driving for approximately 1.6 km (1 mile),the tires are considered to be warm. If you needto drive longer than that to inflate the tires, checkand record the inflation pressure of the tires firstand inflate accordingly when you arrive at thepump.
When the ambient temperature changes, so doesthe inflation pressure. A 10-degree temperaturedrop causes a corresponding drop in inflationpressure of 1 psi (7 kPa). Check the inflationpressure of the tires regularly and adjust to the
correct pressure, which can be found on the vehi-cle's tire information placard or certification label.
If you check inflation pressure when the tires arewarm, you should never release air. The tiresbecome warm after driving and it is normal forwarm tires to have an inflation pressure abovethe recommended pressure for cold tires. A warmtire with an inflation pressure equal to or underthe recommended pressure for cold tires couldbe significantly under-inflated.

Related information
Adjusting tire pressure (p. 550)
Recommended tire pressure (p. 551)
Tire pressure monitoring system* (p. 551)
Tires (p. 542)
4Not available in all models.

WHEELS AND TIRES
550
Adjusting tire pressure
Tire pressure decreases over time, which is nor-mal. The tire pressure must therefore beadjusted to maintain the recommended tire pres-sure.
Use the recommended inflation pressure for coldtires for optimal tire performance and wear.

NOTE
To help prevent incorrect inflation pressure,pressure should be checked when the tiresare cold. The tires are considered to be coldwhen they have reached the same tempera-ture as the ambient temperature (about 3hours after the vehicle was last driven). Afterdriving for a few kilometers, the tires will warmup and the pressure will increase.
1. Remove the valve cap from the tire and pressthe 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 recommended pres-sures for factory-mounted tires.
3.Screw the valve cap back on.
NOTE
After inflating a tire, always replace thevalve 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 thereare no nails or other embedded objects thatcould puncture the tire and cause air leak-age.
5. Check the sidewalls to make sure there areno gouges, cuts, bulges or other irregulari-ties.
6.Repeat this procedure for each tire, including
the spare tire5.
NOTE
If you have overfilled the tire, release air bypushing on the metal stem in the center ofthe valve. Then recheck the pressure withyour tire gauge.
Some spare tires require higher inflation pres-sure than the other tires. Consult the tireinflation pressure table or the inflation pres-sure placard.

Related information
Recommended tire pressure (p. 551)
Checking tire pressure (p. 549)
Inflate tires with the compressor included inthe tire sealing system (p. 569)
Approved tire pressure (p. 649)
5Not available on all models.

WHEELS AND TIRES
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* Option/accessory.551
Recommended tire pressure
The tire pressure placard on the driver's side Bpillar (between the front and the rear door) indi-cates tire pressure for different loads and speedconditions.
The decal specifies the designation for the fac-tory-mounted tires on the vehicle, as well as loadlimits and inflation pressures.

Related information
Checking tire pressure (p. 549)
Approved tire pressure (p. 649)
Tire pressure monitoring system*
The tire pressure monitoring system6 provides awarning symbol in the instrument panel if pres-sure is too low in one or more tires.
Symbol Explanation
This symbol illuminates to indicatelow inflation pressure.
If there is a system malfunction, theinflation pressure warning symbolwill flash for approximately oneminute and then glow steadily.
System description
The tire pressure monitoring system measuresdifferences in rotational speed between thewheels through the ABS system to determine ifthe tires are properly inflated. If inflation pressurein a tire is too low, its diameter (and consequentlyits rotational speed) changes. By comparing thetires with each other, the system can determine ifthe pressure in one or more tires is too low.

General information about the tire pressure
monitoring system
In the following description, the tire monitoringsystem is generally referred to as TPMS.
Each tire, including the spare (if provided)7
should be checked monthly when cold and infla-
ted to the inflation pressure recommended by thevehicle manufacturer on the vehicle placard ortire inflation pressure label. (If your vehicle hastires of a different size than the size indicated onthe vehicle placard or tire inflation pressure label,you should determine the proper tire inflationpressure for those tires.)
As an added safety feature, your vehicle hasbeen equipped with a tire pressure monitoringsystem (TPMS) that illuminates a low tire pres-sure telltale when one or more of your tires issignificantly under-inflated. Accordingly, when thelow tire pressure telltale illuminates, you shouldstop and check your tires as soon as possible,and inflate them to the proper pressure.
Driving on a significantly under-inflated tire cau-ses the tire to overheat and can lead to tire fail-ure. Under-inflation also reduces fuel efficiencyand tire tread life, and may affect the vehicle'shandling and stopping ability. Please note thatthe TPMS is not a substitute for proper tire main-tenance, and it is the driver's responsibility tomaintain correct tire pressure, even if under-infla-tion has not reached the level to trigger illumina-tion of the TPMS low tire pressure telltale.
Your vehicle has also been equipped with aTPMS malfunction indicator to indicate when thesystem is not operating properly. The TPMS mal-function indicator is combined with the low tire
6Tire Pressure Monitoring System (TPMS)7Not available on all models.

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WHEELS AND TIRES
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pressure telltale. When the system detects a mal-function, the telltale will flash for approximatelyone minute and then remain continuously illumi-nated. This sequence will continue upon subse-quent vehicle start-ups as long as the malfunc-tion exists. When the malfunction indicator is illu-minated, the system may not be able to detect orsignal low tire pressure as intended.
TPMS malfunctions may occur for a variety ofreasons, including the installation of replacementor alternate tires or wheels on the vehicle thatprevent the TPMS from functioning properly.
Always check the TPMS malfunction telltale afterreplacing one or more tires or wheels on yourvehicle to ensure that the replacement or alter-nate tires and wheels allow the TPMS to con-tinue to function properly.

Messages in the instrument panel
If tire pressure is too low, the low tire pressurewarning symbol is shown in the instrument panelalong with a message.
Tire pressure low Check tires, calibrateafter fill
Tire pressure system Temporarilyunavailable
Tire pressure system Service required
To keep in mind
Always calibrate the system after changingwheels or adjusting tire pressure. See the tirepressure placard on the driver's side B pillarfor Volvo-recommended tire pressures.
If you switch to a tire of another size than thefactory-mounted tires, the system must becalibrated for these tires to avoid false warn-ings.
If a spare wheel8 is used, it is possible thatthe tire pressure monitoring system will notwork 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 tire pres-sure monitoring system.

WARNING
Incorrect inflation pressure could lead totire failure, which could cause the driverto lose control of the vehicle.
The system cannot predict sudden tiredamage.
Related information
Recommended tire pressure (p. 551)
Viewing tire pressure status in the centerdisplay* (p. 554)
Action when warned of low tire pressure(p. 555)
Calibrating the tire pressure monitoring sys-tem* (p. 553)
8Not available on all models.

WHEELS AND TIRES
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* Option/accessory.553
Calibrating the tire pressure
monitoring system*
In order for the tire pressure monitoring system 9
to function correctly, tire pressure reference val-ues must be set correctly. This must be doneeach time the tires are changed or the tire pres-sure is adjusted.
For example, when driving with a heavy load or athigh speeds (over 160 km/h (100 mph)), tirepressure should be adjusted to the Volvo-recom-mended tire pressure values. The system shouldthen be recalibrated.
1.Switch off the ignition.
2.Inflate the tire to the correct inflation pres-sure; see the tire pressure placard on thedriver's side B pillar for recommended pres-sures for factory-mounted tires.
3. Start the vehicle.
4.Open the Car Status app in App view.
5.Tap TPMS.

NOTE
The car must be stationary when calibration isstarted.
6.Tap Calibrate.
7.Tap OK to confirm that the tire pressure inall four tires has been checked and adjusted.
8. Run the car until calibration is complete.
Calibration is done when the vehicle is driv-ing at a speed above 35 km/h (22 mph).
If the car's ignition is switched off before cal-ibration is complete, the tires in the centerdisplay change color from gray to green uponnext start-up, even if calibration is not com-plete. Perform the calibration again and allowit to complete within the same operatingcycle to ensure that the calibration is carriedout correctly.
>When enough data has been collected forthe system to detect low tire pressure, thecolor of the tire symbols in the center dis-play will change from gray to green. Thesystem will not provide any other confir-mation that calibration has been comple-ted.
If start-up of calibration fails, the followingmessage appears: Calibrationunsuccessful. Try again..
9Tire Pressure Monitoring System (TPMS)

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WHEELS AND TIRES
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NOTE
Always remember to calibrate the Tire Pres-sure Monitoring System when the wheelshave been changed or the tire inflation pres-sure has been corrected according to the tirepressure decal or tire inflation pressure table.
If correct reference values have not been set,the system cannot issue low tire pressurealerts correctly.
The vehicle must be stationary with theengine running to access the calibration but-ton and to start the calibration process.

WARNING
The exhaust gases contain carbon monoxide,which is invisible and odorless but very poi-sonous. For this reason, always perform thecalibration procedure outdoors or in a work-shop with exhaust gas evacuation equipment.

Related information
Recommended tire pressure (p. 551)
Adjusting tire pressure (p. 550)
Viewing tire pressure status in the centerdisplay* (p. 554)
Action when warned of low tire pressure(p. 555)
Tire pressure monitoring system* (p. 551)
Viewing tire pressure status in the
center display*
With the system for tire pressure monitoring 10,tire pressure status can be viewed in the centerdisplay.
Checking status
1.Open the Car Status app in App view.
2.Tap TPMS to display the status of the tires.
Status indicator light
The graphic in the center display shows the sta-
tus of each tire11.
Green tire:
Inflation pressure is above the warningthreshold.
Yellow tire:
The tire's inflation pressure is too low. Stopand check/inflate the tire as soon as possi-ble. Recalibrate the system after adjustingthe tire pressure.
All tires yellow:
The inflation pressure is too low in one ormore tires. Stop and check/inflate the tiresas soon as possible. Recalibrate the systemafter adjusting tire pressure.
10Tire Pressure Monitoring System (TPMS)

WHEELS AND TIRES
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* Option/accessory.555
All tires gray:
Calibration in progress.
Status unknown.
The vehicle may need to be driven for a fewminutes at a speed above 35 km/h (22 mph) toactivate the system.
All tires gray and a message:
Tire pressure system Temporarilyunavailable. The indicator symbol will flashfor about 1 minute and then glow steadily.The system is temporarily unavailable and willbe activated momentarily.
Tire pressure system Service required.The indicator symbol will flash for about 1minute and then glow steadily. If the systemis not working properly, contact a work-
shop12.

Related information
Calibrating the tire pressure monitoring sys-tem* (p. 553)
Action when warned of low tire pressure(p. 555)
Tire pressure monitoring system* (p. 551)
Vehicle status (p. 588)
Action when warned of low tirepressure
When the system for monitoring inflation pres-
sure 13 detects low inflation pressure in a tire,immediate action is required.
If the system's indicator symbol illumi-nates and the message Tire pressurelow is displayed, check the tire pres-sure and inflate if necessary.
1. Switch off the ignition.
2. Check the inflation pressure on all four tiresusing a tire pressure gauge.
3.Inflate the tire to the correct inflation pres-sure; see the tire pressure placard on thedriver's side B pillar for recommended pres-sures for factory-mounted tires.
4. Through calibration of the system via thecenter display after the tire pressure hasbeen adjusted.
Please be aware that the indicator symbolwill not go out until the low tire pressure hasbeen corrected and the system has beenrecalibrated.
NOTE
To help prevent incorrect inflation pressure,pressure should be checked when the tiresare cold. The tires are considered to be coldwhen they have reached the same tempera-ture as the ambient temperature (about 3hours after the vehicle was last driven). Afterdriving for a few kilometers, the tires will warmup and the pressure will increase.

NOTE
After inflating a tire, always replace thevalve 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 totire failure, which could cause the driverto lose control of the vehicle.
The system cannot predict sudden tiredamage.
11The illustration is generic. Layout may vary depending on vehicle model or software version.12An authorized Volvo workshop is recommended.13Tire Pressure Monitoring System (TPMS)

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WHEELS AND TIRES
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Related information
Recommended tire pressure (p. 551)
Adjusting tire pressure (p. 550)
Calibrating the tire pressure monitoring sys-tem* (p. 553)
Viewing tire pressure status in the centerdisplay* (p. 554)
Tire pressure monitoring system* (p. 551)
Inflate tires with the compressor included inthe tire sealing system (p. 569)
When changing wheels
The wheels can be changed, e.g. to switch tosnow tires or spare tires. Follow the applicableinstructions for removing and installing thewheel.

Changing to tires of another dimension
Make sure that the tire dimension is approved foruse on the vehicle.
If you change to tires of another dimension, con-tact an authorized Volvo workshop to update thevehicle's software. A software update may benecessary when changing to tires of larger/smaller dimensions or when changing to or fromsnow tires.

Related information
Removing a wheel (p. 558)
Installing a wheel (p. 560)
Tool kit (p. 556)
Snow tires (p. 563)
Spare wheel (p. 561)
Wheel bolts (p. 557)
Tool kit
Tools for e.g. towing or changing wheels areprovided in the vehicle's trunk.
The foam block under the cargo compartmentfloor contains the towing eyelet, the tire sealingsystem, the tool for removing plastic wheel boltcovers and the tool for removing the lockingwheel bolts.
If the vehicle is equipped with a spare wheel*14, ajack, lug wrench, and a package withdisposable gloves and a bag for the damagedwheel are also provided.

Related information
When changing wheels (p. 556)
Jack* (p. 557)
14Not available on all models.

WHEELS AND TIRES
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* Option/accessory.557
Jack*
The jack can be used to lift the vehicle to e.g.change a wheel.
The illustration is generic – the design may vary.

CAUTION
When not in use, the jack* should be keptin its storage compartment under thecargo compartment floor.
The jack provided with your vehicle isintended to be used only in temporary sit-uations such as changing wheels in theevent of a flat tire. Only the jack thatcame with your particular model shouldbe used to lift the vehicle. If the vehicleneeds to be lifted more frequently or for aprolonged period, using a garage jack orhoist is recommended. Always follow thisdevice's instructions for use.
The jack needs to be cranked together to thecorrect position in order to fit.

Models with leveling control *
If the vehicle is equipped with the optional pneu-matic suspension, it must be turned off beforethe vehicle is lifted on a jack.

Related information
Tool kit (p. 556)
Wheel bolts
The wheel bolts hold the wheel in place on thewheel hub.
CAUTION
The wheel bolts should be tightened to140 Nm (103 ft. lbs.). Over-tightening orunder-tightening could damage the threadedjoints.
Only use rims that have been tested andapproved by Volvo and are included in Volvo'soriginal product range.
Use a torque wrench to check that the wheelbolts are tightened correctly.
Do not grease the wheel bolt threads.

WARNING
The wheel bolts may need to be tightenedagain several days after a wheel change.Temperature fluctuations and vibrations cancause them to loosen slightly.

Locking wheel bolts *
A tool for removing the locking wheel bolts islocated in the foam block under the cargo com-partment floor.

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WHEELS AND TIRES
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Related information
Removing a wheel (p. 558)
Installing a wheel (p. 560)
Removing a wheel
Instructions for removing a wheel when chang-ing wheels. Wheel changes must always be car-ried out correctly.

CAUTION
When not in use, the jack* should be keptin its storage compartment under thecargo compartment floor.
The jack provided with your vehicle isintended to be used only in temporary sit-uations such as changing wheels in theevent of a flat tire. Only the jack thatcame with your particular model shouldbe used to lift the vehicle. If the vehicleneeds to be lifted more frequently or for aprolonged period, using a garage jack orhoist is recommended. Always follow thisdevice's instructions for use.
WARNING
Apply the parking brake and put the gearselector in the Park (P) position.
Block the wheels standing on the ground,use rigid wooden blocks or large stones.
Check that the jack is not damaged, thethreads are properly lubricated and it isfree from dirt.
Be sure the jack is on a firm, level, non-slippery surface and that it is upright andnot leaning.
The jack must correctly engage in thejack attachment.
No objects should be placed between thebase of the jack and the ground, orbetween the jack and the attachment baron the vehicle.
Never let anyone remain in the vehiclewhen it is raised on a jack.
If a tire must be changed near passingtraffic, make sure all passengers move toa safe location.
Use a jack intended for the vehicle whenchanging a tire. For any other job, usestands to support the vehicle.
Never crawl under or allow any part ofyour body to be extended under a vehiclesupported by a jack.