2018 VOLVO XC90 TWIN ENGINE tyre pressure

WHEELS AND TIRES
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* Option/accessory. 559
Recommended tire pressure
The tire pressure placard on the driver's side B
pillar (between the front and the rear door) indi-
cates tire pressure for different loads and speed
conditions. The placard specifies the designation for the fac-
tory-mounted tires on the vehicle, as well as load
limits and inflation pressures.
Related information
•
Checking tire pressure (p. 557)
• Approved tire pressure (p. 665) Tire pressure monitoring system*
The tire pressure monitoring system, Tyre
Pressure Monitoring System (TPMS), provides a
warning symbol in the instrument panel if pres-
sure is too low in one or more tires. Symbol
Explanation 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 and then glow steadily.
System descriptionThe tire pressure monitoring system measures
differences in rotational speed between the
wheels through the ABS system to determine if
the tires are properly inflated. If inflation pressure
in a tire is too low, its diameter (and consequently
its rotational speed) changes. By comparing the
tires with each other, the system can determine if
the pressure in one or more tires is too low.
General information about the tire pressure
monitoring system
In the following description, the tire monitoring
system is generally referred to as TPMS.
Each tire, including the spare tire (if provided)
6
,
should be checked monthly when cold and infla- ted to the inflation pressure recommended by the
vehicle manufacturer on the vehicle placard or
tire inflation pressure label. (If your vehicle has
tires of a different size than the size indicated on
the vehicle placard or tire inflation pressure label,
you should determine the proper tire inflation
pressure for those tires.)
As an added safety feature, your vehicle has
been equipped with a tire pressure monitoring
system (TPMS) that illuminates a low tire pres-
sure telltale when one or more of your tires is
significantly under-inflated. Accordingly, when the
low tire pressure telltale illuminates, you should
stop 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 efficiency
and tire tread life, and may affect the vehicle's
handling and stopping ability. Please note that
the TPMS is not a substitute for proper tire main-
tenance, and it is the driver's responsibility to
maintain 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 a
TPMS malfunction indicator to indicate when the
system is not operating properly. The TPMS mal-
function indicator is combined with the low tire
pressure telltale. When the system detects a mal-
6
Not available on all models.

WHEELS AND TIRES
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* Option/accessory. 561
Calibrating the tire pressure
monitoring system*
In order for the tire pressure monitoring system,
Tyre Pressure Monitoring System (TPMS), to
function correctly, tire pressure reference values
must be set correctly. This must be done each
time the tires are changed or the tire 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-recom-
mended tire pressure values. The system should
then be recalibrated.
1.

Switch off the ignition.
2. Inflate the tires to the pressure indicated on the tire pressure placard on the driver's side
B pillar.
3. Start the vehicle.
4. Open the Car status app in App view. 5.
Tap TPMS.NOTE The car must be stationary when calibration is
started.
6.
Tap Calibrate.
7. Tap OK to confirm that the tire pressure in
all 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).
> When enough data has been collected for the system to detect low tire pressure, the
color of the tire symbols in the center dis-
play will change from gray to green. The
system will not provide any other confir-
mation that calibration has been comple-
ted.
If the car's ignition is switched off before
calibration is complete, the tires in the
center display change color from gray to
green upon next start-up, even if calibra-
tion is not complete. Perform the calibra-
tion again and allow it to complete within
the same operating cycle to ensure that
the calibration is carried out correctly.
If start-up of calibration fails, the following
message appears: Calibration
unsuccessful. Try again..

||WHEELS AND TIRES
* Option/accessory.
562
NOTE Always remember to calibrate the Tire Pres-
sure Monitoring System when the wheels
have been changed or the tire inflation pres-
sure has been corrected according to the tire
pressure decal or tire inflation pressure table.
If correct reference values have not been set,
the system cannot issue low tire pressure
alerts correctly.
The vehicle must be stationary with the
engine 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 the
calibration procedure outdoors or in a work-
shop with exhaust gas evacuation equipment.
Related information
•
Recommended tire pressure (p. 559)
• Adjusting tire pressure (p. 558)
• Viewing tire pressure status in the center
display* (p. 562)
• Action when warned of low tire pressure
(p. 563)
• Tire pressure monitoring system* (p. 559) Viewing tire pressure status in the
center display*
With the system for tire pressure monitoring,
Tyre Pressure Monitoring System (TPMS), tire
pressure status can be viewed in the center dis-
play.
Checking status1. 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 tire 8
. Green tire:
• Inflation pressure is above the warning
threshold.
Yellow tire:
• The tire's inflation pressure is too low. Stop
and check/inflate the tire as soon as possi-
ble. Recalibrate the system after adjusting
the tire pressure.
All tires yellow:
• The inflation pressure is too low in one or
more tires. Stop and check/inflate the tires
as soon as possible. Recalibrate the system
after adjusting tire pressure.
All tires gray:
• Calibration in progress.
• Status unknown. 8
The illustration is generic. Layout may vary depending on vehicle model \
or software version.

WHEELS AND TIRES
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* Option/accessory. 563
The vehicle may need to be driven for a few
minutes at a speed above 35 km/h (22 mph) to
activate the system.
All tires gray and a message:
•
Tire pressure system Temporarily
unavailable. The indicator symbol will flash
for about 1 minute and then glow steadily.
The system is temporarily unavailable and will
be activated momentarily.
• Tire pressure system Service required.
The indicator symbol will flash for about 1
minute and then glow steadily. If the system
is not working properly, contact a workshop 9
.
Related information
• Calibrating the tire pressure monitoring sys-
tem* (p. 561)
• Action when warned of low tire pressure
(p. 563)
• Tire pressure monitoring system* (p. 559)
• Vehicle status (p. 602) Action when warned of low tire
pressure
When the tire pressure monitoring system, Tyre
Pressure Monitoring System (TPMS), detects
low pressure in one or more of the vehicle's
tires, the driver will be alerted that action is nee-
ded. If the system's indicator symbol illumi-
nates and the message Tire pressure
low is displayed, check the tire pres-
sure and inflate if necessary. 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 pressure (see the tire pressure decal on the driver's side
door pillar).
4. Through calibration of the system via the center display after the tire pressure has
been adjusted.
Please be aware that the indicator symbol
will not go out until the low tire pressure has
been corrected and the system has been
recalibrated.
NOTE To help prevent incorrect inflation pressure,
pressure should be checked when the tires
are cold. The tires are considered to be cold
when they have reached the same tempera-
ture as the ambient temperature (about 3
hours after the vehicle was last driven). After
driving for a few kilometers, the tires will warm
up and the pressure will increase.
NOTE
•
After inflating a tire, always replace the
valve cap to help prevent valve damage
caused by gravel, dirt, etc.
• Use plastic valve caps only. Metal caps
could corrode and become difficult to
remove.
WARNING •
Incorrect inflation pressure could lead to
tire failure, which could cause the driver
to lose control of the vehicle.
• The system cannot predict sudden tire
damage. 9
An authorized Volvo workshop is recommended.