2004 VOLVO XC90 traction control

2004 VOLVO XC90
WARNING!
The IC system is a supplement to the Side Impact Protection System. It i\
s not designed to deploy
during collisions from the front or rear of the vehicle. The Inflatable \
Curtains are designed to deploy
only during certain side-impact collisions, depending on the crash sever\
ity, angle, speed and impact.
The Inflatable Curtains are not designed to deploy in all side impact si\
tuations.
Never try to open or repair any components of the IC system. This should\
be done only by an
authorized Volvo service technician.
In order for the IC to provide its best protection, both front seat occu\
pants and all outboard rear seat
occupants should sit in an upright position with the seat belt properly \
fastened; adults using the seat
belt and children using the proper child restraint system. Only adults s\
hould sit in the front seats.
Children must never be allowed in the front passenger seat. See
page 20 for guidelines. Failure to
follow these instructions can result in injury to the vehicle occupants \
in an accident.
When the backrest(s) in the rear seat(s) are folded down, the vehicl\
e should not be loaded to a level
higher than 2 inches (5 cm) below the upper edge of the side windows. \
Objects placed higher than
this level could impede the function of the Inflatable Curtain.
pg. 13 Safety
Roll-over Protection System
Volvo's Roll-over Protection System has been developed to help prevent t\
he vehicle from rolling over in
the event of sudden evasive maneuvers, skids, etc and to offer enhanced \
protection if a roll-over occurs.
The system works in two ways:
l The stabilizing system Roll Stability Control (RSC) acts to minimize b\
ody roll.
l The system provides additional protection with a reinforced body, Inflat\
able Curtains for all outboard
seating positions, and seat belt pretensioners for all seating positions\
.
RSC uses a gyro-sensor that registers the vehicle's angle of inclination\
and the speed at which this angle
changes. Using this information, the control module calculates the risk \
of a roll-over. If there is an
imminent roll-over risk, the Dynamic Stability and Traction Control (DS\
TC) system is activated, engine
speed is reduced, and the brakes are applied to one or more of the wheel\
s until the vehicle has regained
stability.
If a roll-over occurs, RSC triggers the seat belt pretensioners and then\
deploys the Inflatable Curtains
(which remain inflated for approximately 5 seconds). These curtains ar\
e designed to follow the contours
of the side windows so that they position themselves between the occupan\
ts' heads and the sides of the
vehicle.
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2004 VOLVO XC90
WARNING!
The If the fluid level is below the MIN mark in the reservoir or if a "B\
rake failure - Service urgent"
message is displayed in the text window: DO NOT DRIVE. Have the vehicle \
towed to an authorized
Volvo retailer and have the brake system inspected.
l If the brake fluid level is above the MIN mark, drive carefully to an au\
thorized Volvo retailer and
have the brake system inspected Volvo retailer and have the brake system\
inspected.
DSTC
The Dynamic Stability and Traction Control system (DSTC) is explained \
in greater detail on
pages 95
and 96. This system consists of several functions:
Risk for slippery conditions
If the warning light comes on and stays on, this indicates that traction\
with the road surface is reduced.
Drive with caution.
If this light flashes, it indicates that the DSTC system is working to restore traction to on\
e or more of the
wheels.
Reduced Stability Control
If the green indicator light in the DSTC button goes out, DSTC has reduc\
ed effect because the system
had been switched off with the button in the center console. The text DS\
TC SPIN CONTROL OFF will
be displayed in the text window.
Reduced anti-spin function
If the yellow indicator light comes on and remains on, DSTC's Stability \
Control function has been
switched off due to excessively high brake temperature. The text TRACTIO\
N CONTROL
TEMPORARILY OFF will be displayed in the text window.
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2004 VOLVO XC90

The positions of these buttons may vary, depending on the specifications\
of your vehicle
1. Rear Parking Assistants (option)
This system provides an audible warning if you back the vehicle to withi\
n approximately 5 feet (1.5
meters) of an object. See
page 97 for more information.
NOTE: The system activates automatically when the engine is started, and can b\
e deactivated by
pressing this button (e.g. when towing a trailer) or reactivated if ne\
cessary.
2. Folding sideview mirrors (option)
Press the button and release it to fold the sideview mirrors in or out. \
On certain models, when the button
is pressed, there may be a long pause before the mirrors move. Pressing \
the button again during this
pause may erase your first button press. If this happens, wait ten secon\
ds and press the button one more
time. The mirrors cannot be adjusted during the first ten seconds after \
they have been folded out. NOTE:
If the sideview mirrors have been inadvertently pushed out of position (\
in a car wash, parking lot, etc.)
manually return them to normal position. If mirror adjustment does not s\
eem to operate after manual
folding, reset the folding mirrors as follows:
l Turn the ignition key to position II.
l Manually fold the mirror(s) to the normal position.
l Press the button to fold both mirrors in.
l Press the button again to fold the mirrors out to their normal position.\

3. Auxiliary lights
This button is used to switch on auxiliary lights (if installed). An L\
ED in the switch will light up to
indicate that the auxiliary lights are illuminated.
4. Dynamic Stability Traction Control system (DSTC)
This button is used to switch off DSTC's stability Control function. Whe\
n the LED in the button is ON,
all DSTC functions are active. See
pages 95 and 96 for additional information.
WARNING!
The Please be aware that the vehicle's handling characteristics may be a\
ffected if the Stability Control
function is switched off.
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2004 VOLVO XC90
2 0 0 4
VOLVO XC90
Starting and driving

pg. 81 Starting and driving
Refueling82
Starting the vehicle85
General information87
Automatic transmission with Geartronic89
All Wheel Drive92
Brake system93
Dynamic Stability Traction Control (DSTC)95
Rear Parking Assistance97
Towing 98
Jump starting 100
Towing a trailer 101
Detachable trailer hitch - installing/
removing 103
Load carriers 104
Cold weather precautions 105
Before a long distance trip106
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2004 VOLVO XC90
to spin, an electronically controlled coupling distributes power to the \
wheels that have the best traction.
Tire dimensions
Volvo recommends that you always drive on tires of the same brand, size,\
construction (radial), tread
pattern, load-, speed-, traction-, temperature-, and treadwear rating. N\
ever drive on mixed tires, except
for brief periods when the temporary spare tire is in use.
Always use properly inflated tires of correct dimensions. Tire size and \
inflation pressures are shown on
the tire pressure label located inside the fuel filler door.
Tire Rotation
Volvo recommends rotating the tires every 7,500 miles (12,000 km). Tir\
es should be rotated front-to-
back/back-to-front only. Tires must maintain the same direction of rotat\
ion throughout their lifetime, and
should never be rotated from one side of the vehicle to the other.
Temporary Spare
The temporary spare tire is for temporary, low-speed, short-distance use\
only. Replace it with a full-
sized tire as soon as possible, in accordance with "Tire Rotation" in th\
e previous paragraph. Do not drive
on the temporary spare at speeds above 50 m.p.h. (80km/h) or for dista\
nces greater than 50 miles (80
km).
Never install snow chains on a temporary spare.




Contents | Top of Page
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2004 VOLVO XC90
If the BRAKE and ABS warning lights come on at the same time, this could\
indicate a fault in the brake
system.
l Stop the vehicle in a suitable place and switch off the engine.
l Restart the engine.
l If both warning lights go off, no further action is required.
l If both lights are still on after the engine has been restarted, switch \
off the engine again and check the
brake fluid level (see
page 126 for the location of the brake fluid reservoir).
l If the brake fluid level is above the MIN mark, drive carefully to an au\
thorized Volvo retailer and
have the brake system inspected.
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.
pg. 95 Starting and driving
Dynamic Stability Traction Control (DSTC)
The DSTC system on the Volvo XC90 consists of a number of functions:
1. Traction control (TC)
This function is designed to help reduce wheel spin by transferring powe\
r from a drive wheel that begins
to lose traction to the wheel on the opposite side of the vehicle (on t\
he same axle). TC monitors and
compares the rotational speed of the drive wheels. If one of the drive w\
heels shows a tendency to spin,
the difference in speed is immediately detected. This triggers the Anti-\
lock Brake System, which brakes
the spinning wheel until the difference in rotational speed is corrected\
.
TC is most active at low speeds, and a pulsating sound will be audible w\
hen the system is regulating
wheel spin. This is quite normal.
This is one of the DSTC system's permanent functions and is not affected\
when the DSTC button on the
center control panel is pressed.
2. Spin control (SC)
The spin control function is designed to help prevent the drive wheels f\
rom spinning while the vehicle is
accelerating. This is done by temporarily reducing engine torque to the \
drive wheels, which helps
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2004 VOLVO XC90
Dynamic Stability Traction Control (DSTC) (contd)
The Stability Control indicator light
The Stability Control indicator light will come on for approximately 2 s\
econds when the ignition is
switched on as the system performs a self-diagnostic test.
The Stability Control indicator light will flash when:
l Traction Control is actively functioning to help avoid drive-wheel spin.\

l Spin Control is actively functioning to help avoid loss of traction duri\
ng acceleration.
l Active Yaw Control is actively functioning to help avoid skids or latera\
l slides.
l Roll Stability Control is actively functioning to help avoid a roll-over\
situation.
The warning symbol in the instrument panel
A steady yellow glow indicates:
l That the system has been automatically disengaged due to a fault. "ANTI \
SKID SERVICE
REQUIRED" be displayed in the text window. An authorized Volvo retailer \
should check the system.
l In the event of high brake temperature, "TRACTION CONTROL TEMPORARILY OF\
F" will be
displayed in the text window. The system will automatically switch on ag\
ain when the brakes have
cooled.
Emergency Brake Assistance (EBA)
The EBA function is an integrated part of the DSTC system. EBA is design\
ed to provide full brake
effect immediately in the event of sudden, hard braking. The system is a\
ctivated by the speed with which
you depress the brake pedal.
NOTE:
l When the EBA system is activated, the brake pedal will go down and press\
ure in the brake system
immediately increases to the maximum level. Maintain full pressure on th\
e brake pedal in order to utilize
the system completely. EBA is automatically deactivated when the brake p\
edal is released.
l When the vehicle has been parked for some time, the brake pedal may sink\
more than usual when the
engine is started. This is normal and the pedal will return to its usual\
position when it is released.
pg. 97 Starting and driving
Rear Parking Assistance
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2004 VOLVO XC90
Treadwear 200 Traction AA Temperature A
TREADWEAR
The treadwear grade is a comparative rating based on the wear rate of th\
e tire when tested under
controlled conditions on a specified government test course. For example\
, a tire graded 150 would wear
one and one half (1 1/2) times as well on the government course as a t\
ire graded 100. The relative
performance of tires depends upon the actual conditions of their use, ho\
wever, and many depart
significantly from the norm due to variation in driving habits, maintena\
nce practices and differences in
road characteristics and climate.
TRACTION
The traction grades, from highest to lowest, are AA, A, B, and C, as mea\
sured under controlled
conditions on specified government test surfaces of asphalt and concrete\
. A tire marked C may have
poor traction performance.
WARNING!
The traction grade assigned to this tire is based on braking (straight-\
ahead) traction tests and is not a
measure of cornering (turning) traction.
TEMPERATURE
The temperature grades are AA (the highest), A, B, and C, representing\
the tire's resistance to the
generation of heat and its ability to dissipate heat when tested under c\
ontrolled conditions on specified
indoor laboratory test wheel. Sustained high temperature can cause the m\
aterial of the tire to degenerate
and reduce tire life, and excessive temperature can lead to sudden tire \
failure. The grade C corresponds
to minimum level of performance that all passenger vehicle tires must me\
et under the Federal Motor
Safety Standard No. 109. Grades B and A represent higher levels of perfo\
rmance on the laboratory test
wheel than the minimum required by law.
WARNING!
The temperature grade for this tire is established for a tire that is pr\
operly inflated and not overloaded.
Excessive speed, under-inflation, or excessive loading, either separatel\
y or in combination, can cause
heat buildup and possible tire failure.
pg. 113 Wheels and tires
Changing wheels
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