wheel torque VOLVO XC90 2004 Owners Manual

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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
3. Loosen the wheel bolts by exerting downward pressure on the lug wrenc\
h.
4. Remove the wheel cap (where applicable) using the lug wrench in the\
tool bag.
5. With the wheels still on the ground, use the lug wrench to loosen the\
wheel bolts 1/2 - 1 turn. Turn the
bolts counterclockwise to loosen the bolts. CAUTION
- The vehicle must not be driven with wheels of different dimensions or \
with a spare tire other than
the one that came with the vehicle. The use of different size wheels can\
seriously damage your
vehicle's transmission.
- Correct tightening torque on wheel bolts must be observed.
- The wheel bolts should never be greased or lubricated.
- Extended, chromed wheel bolts must not be used with steel rims, as the\
y make it impossible to fit
the hub caps.
WARNING!
The use of an incorrect type of wheel bolt could cause the wheel to loos\
en from the hub. Contact your
Volvo retailer if you are uncertain as to the type of wheel bolt that sh\
ould be used on your vehicle.
pg. 116 Wheels and tires

Attaching the jack
l Place the jack on the ground, under one of the attachment points (see t\
he illustration on the previous
page) and crank while simultaneously guiding the jack's attachment brac\
ket onto the attachment point
(see illustration above) The base of the jack must be flat on a level,\
firm, non-slippery surface. Before
raising the vehicle, check that the jack is still correctly positioned i\
n the attachment.
l Raise the vehicle until the wheel to be changed is lifted off the ground\
.
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