brake pads VOLVO XC90 2004 Owners Manual

2004 VOLVO XC90
In production, Volvo has partly or completely phased out several chemica\
ls including chloro-fluorocarbons
(CFCs), lead chromates, naphtanates, asbestos, mercury and cadmium; an\
d reduced the amount of chemicals
used in our plants 50% since 1991.
Volvo was the first in the world to introduce into production a three-wa\
y catalytic converter with Lambda
Sond, now called oxygen sensor, in 1976. The current version of this hig\
hly efficient system reduces emissions
of harmful substances (CO, HC, NOx) from the exhaust pipe by approxima\
tely 95% and the search to eliminate
the remaining emissions continues. Volvo is the only automobile manufact\
urer to offer CFC-free retrofit kits
for the air conditioning system of all models as far back as the 1975 Vo\
lvo 240. Advanced electronic engine
controls, refined purification systems and cleaner fuels are bringing us\
closer to our goal.
After Volvo vehicles and parts have fulfilled their use, recycling is th\
e next critical step in completing the life
cycle. The metal content is about 75% of the total weight of a vehicle, \
which makes the vehicle among the most
recycled industrial products. In order to have efficient and well contro\
lled recycling, many Volvo variants have
printed dismantling manuals, indicating the weight and material of indiv\
idual components. For Volvo, all
homogeneous plastic parts weighing more than 1.7 oz. (50 grams) are ma\
rked with international symbols that
indicate how the component is to be sorted for recycling.
In addition to continuous environmental refinement of conventional gasol\
ine-powered internal combustion
engines, Volvo is actively looking at advanced technology alternative-fu\
el vehicles.
When you drive a Volvo, you become our partner in the work to lessen the\
car's impact on the environment.
To reduce your vehicle's environmental impact, you can:
l Maintain proper air pressure in your tires. Tests have shown decreased f\
uel economy with improperly
inflated tires.
l Follow the recommended maintenance schedule in your Warranty and Service\
Records Information booklet.
l Drive at a constant speed.
l See an authorized Volvo retailer as soon as possible for inspection if t\
he check engine (malfunction
indicator) lamp illuminates, or stays on after the vehicle has started.\

l Properly dispose of any vehicle-related waste such as used motor oil, us\
ed batteries, brake pads, etc.
l When cleaning your car, use Volvo's own car care products, all of which \
have systematically been adapted to
the environment.
For additional information regarding the environmental activities in whi\
ch Volvo Cars of North America, LLC.
and Volvo Car Corporation are involved, visit our Internet Home Page at:\

http://www.volvocars.com
PremAir®
On the surface of the radiator in the engine compartment, there is a spe\
cial coating called PremAir®. PremAir®
works as a catalytic converter, converting most of the ground-level ozon\
e passing through the radiator into
oxygen, thereby reducing harmful ground-level ozone.
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2004 VOLVO XC90
pg. 93 Starting and driving
Brake system
BRAKE Brake circuit malfunction
The brake system is a hydraulic system consisting of two master cylinder\
s and two separate brake
circuits. If a problem should occur in one of these circuits, it is stil\
l possible to stop the vehicle with the
other brake circuit.
If the brake pedal must be depressed farther than normal and requires gr\
eater foot pressure, the stopping
distance will be longer.
A warning light in the instrument panel will light up to warn the driver\
that a fault has occurred.
If this light comes on while driving or braking, stop immediately and ch\
eck the brake fluid level in the
reservoir.
NOTE: Press the brake pedal hard and maintain pressure on the pedal - do not p\
ump the brakes.
WARNING!
If the fluid level is below the MIN mark in the reservoir or if a "Brake\
failure - Service urgent"
message is displayed in the text window: DO NOT DRIVE. Have the vehicle \
towed to a Volvo
retailer and have the brake system inspected.
NOTE: When the vehicle is at a standstill and the engine is idling, e.g. at a \
traffic light and the brake
pedal is depressed, the pedal may go down slightly. This is a normal fun\
ction of the power-assisted
brake system.
Power brakes function only when the engine is running
The power brakes utilize vacuum pressure which is only created when the \
engine is running. Never let
the vehicle roll to a stop with the engine switched off.
If the power brakes are not working, the brake pedal must be pressed app\
roximately four times harder
than usual to make up for the lack of power assistance. This can happen \
for example when towing your
vehicle or if the engine is switched off when the vehicle is rolling. Th\
e brake pedal feels harder than
usual.
Water on brake discs and brake pads affects braking
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2004 VOLVO XC90
Driving in rain and slush or passing through an automatic car wash can c\
ause water to collect on the
brake discs and pads. This will cause a delay in braking effect when the\
pedal is depressed. To avoid
such a delay when the brakes are needed, depress the pedal occasionally \
when driving through rain,
slush, etc. This will remove the water from the brakes. Check that brake\
application feels normal. This
should also be done after washing or starting in very damp or cold weath\
er.
Severe strain on the brake system
The brakes will be subject to severe strain when driving in mountains or\
hilly areas, or when towing a
trailer. Vehicle speed is usually slower, which means that the cooling o\
f the brakes is less efficient than
when driving on level roads. To reduce the strain on the brakes, shift i\
nto a lower gear and let the engine
help with the braking. Do not forget that if you are towing a trailer, t\
he brakes will be subjected to a
greater than normal load.
pg. 94 Starting and driving
Brake system (contd)
Anti-lock brakes (ABS)
If the warning lamp lights up there is a malfunction of the ABS system (\
the standard braking system will
however function) and the vehicle should be driven cautiously to a Volv\
o retailer for inspection. The
Anti-lock Braking System (ABS) helps to improve vehicle control (stop\
ping and steering) during severe
braking conditions by limiting brake lockup. When the system "senses" im\
pending lockup, braking
pressure is automatically modulated in order to help prevent lockup, whi\
ch could lead to a skid.
This system performs a self-diagnostic test when the engine is started a\
nd when the vehicle first
reaches a speed of approximately 12 mph (20 km/h). The brake pedal will pulsate several times and a
sound may be audible from the ABS control module. This is normal.
To obtain optimal effect from the ABS system, constant pressure should b\
e kept on the brake pedal,
keep constant pressure on the brake pedal. Do not pump the brake pedal.
The switching of the ABS modulator will be audible and the brake pedal w\
ill pulsate during braking.
Please be aware that ABS does not increase the absolute braking potentia\
l of the vehicle. While control
will be enhanced, ABS will not shorten stopping distances on slippery su\
rfaces.
ABS with EBD (Electronic Brake Force Distribution)
EBD is an integrated part of the ABS system. EBD regulates the hydraulic\
pressure to the rear brakes to
help provide optimal braking capacity. The brake pedal will pulsate duri\
ng braking, which is normal.
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