Maintaining Your Vehicle - Volvo XC90 Owner's Manual

Owner maintenance
Periodic maintenance requirements and inter-
vals are described in your vehicle's Warranty
and Service Records Information booklet.
The following points can be carried out
between the normally scheduled maintenance
services.
Each time the vehicle is refueled
•
Check the engine oil level
•
Clean the windshield, windshield wipers,
headlights, and tail lights
Monthly
•
Check cold tire pressure in all tires.
Inspect the tires for wear.
•
Check that engine coolant and other fluid
levels are between the indicated "min"
and "max" markings.
•
Clean interior glass surfaces with a glass
cleaner and soft paper towels.
•
Wipe driver information displays with a
soft cloth.
•
Visually inspect battery terminals for cor-
rosion. Corrosion may indicate a loose
terminal connector, or a battery near the
end of its useful service life. Consult a
trained and qualified Volvo service techni-
cian for additional information.
As needed
•
Wash the vehicle, including the undercar-
riage, to reduce wear that can be caused
by a buildup of dirt, and corrosion that
can be caused by salt residues.
•
Clean leaves and twigs from air intake
vents at the base of the windshield, and
from other places where they may collect.
•
Complete service information for qualified
technicians is available online for pur-
chase or subscription at www.volvote-
chinfo.com.
Emission inspection readiness
What is an Onboard Diagnostic System
(OBD II)?
OBD II is part of your vehicle's computerized
engine management system. It stores diag-
nostic information about your vehicle's emis-
sion controls. It can light the Check Engine
light (MIL) if it detects an emission control
"fault." A "fault" is a component or system
that is not performing within an expected
range. A fault may be permanent or tempo-
rary. OBD II will store a message about any
fault.
How do states use OBD II for emission
inspections?
Many states connect a computer directly to a
vehicle's OBD II system. The inspector can
09 Maintenance and servicing

Maintaining your vehicle

then read "faults." In some states, this type of
inspection has replaced the tailpipe emission
test.
How can my vehicle fail OBD II emission
inspection?
Your vehicle can fail OBD II emission inspec-
tion for any of the following reasons.
•
If your Check Engine (MIL) light is lit, your
vehicle may fail inspection.
•
If your vehicle's Check Engine light was
lit, but went out without any action on
your part, OBD II will still have a recorded
fault. Your vehicle may pass or fail,
depending on the inspection practices in
your area.
•
If you had recent service that required
disconnecting the battery, OBD II diag-
nostic information may be incomplete
and "not ready" for inspection. A vehicle
that is not ready may fail inspection.
How can I prepare for my next OBD II
emission inspection?
•
If your Check Engine (MIL) light is lit – or
was lit but went out without service, have
your vehicle diagnosed and, if necessary,
serviced by a qualified Volvo technician.
•
If you recently had service for a lit Check
Engine light, or if you had service that
required disconnecting the battery, a
period of driving is necessary to bring the
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