2004 VOLVO XC70 wheel torque

2004 VOLVO XC70
The stability systems consist of a number of functions:
The following two functions are common to both STC/DSTC
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 car (on the s\
ame 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 STC/DSTC's permanent functions and is not affected wh\
en the 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 car is
accelerating. This is done by temporarily reducing engine torque to the \
drive wheels, which helps
improve stability and tractive force.
Under certain circumstances, such as when driving with snow chains, or d\
riving in deep snow or loose
sand, it may be advisable to temporarily switch off this function for ma\
ximum tractive force. This is
done by pressing the STC/DSTC button on the center control panel for at \
least a half a second.
When the SC function has been switched off:
l The text window (see page 27) will briefly display "SPIN CONTROL OFF"
l The LED in the STC/DSTC button will be off.
The following two functions are only available with DSTC:
3. Active Yaw Control (AYC)
This function helps maintain directional stability, for example when cor\
nering, by braking one or more
of the wheels if the car shows a tendency to skid or slide laterally. Th\
is is done by activating the Anti-
lock Braking System. A pulsating sound will be audible when the function\
is active, which is quite
normal. If you apply the brakes while this function is active, the brake\
pedal will feel stiffer than usual.
This is also one of the DSTC system's permanent functions and is not aff\
ected when the DSTC button on
the center control panel is pressed.
R-models only:
The AYC function can be deactivated. This is done by pressing the DSTC b\
utton on the center control
panel (see the illustration on
page 31) for approximately one second. This procedure must be repeated 5
times, after which "DSTC REDUCED FUNCTION" will be displayed in the text\
window. AYC will be
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2004 VOLVO XC70

Jack for AWD models
CAUTION:
l The car must not be driven with wheels of different dimensions or with a\
spare tire other than the one
that came with the car. The use of different size wheels can seriously d\
amage your car's transmission.
l Correct tightening torque on wheel bolts must be observed. The wheel bol\
ts should never be greased
or lubricated. The extended, chromed wheel bolts must not be used with s\
teel rims, as they make it
impossible to fit the hub caps.

Correct tightening order for wheel bolts
Installing the wheel
l Clean the contact surfaces on the wheel and hub.
l Lift the wheel and place it on the hub. Make sure that you align the whe\
el with the guide stud on the
wheel hub prior to installation.
l Install the wheel bolts and tighten hand-tight. Using the lug wrench, ti\
ghten crosswise (see illustration
above) until all bolts are snug.
l Lower the vehicle to the ground and alternately tighten the bolts crossw\
ise to 100 ft. lbs. (136 Nm).
l Install the wheel cap (where applicable).




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2004 VOLVO XC70
The engine is equipped with a multiport fuel injection system.
Distributor ignition system
Firing order: 1-2-4-5-3
Electronic ignition setting: Not adjustable
Spark plugs: Champion RC8PYP 8 (or equivalent)
Spark plug gap: 0.028-0.032" (0.7-0.8 mm)
Tightening torque: 18.4 ft. lbs. (25 Nm) WARNING!
The ignition system operates at very high voltages. Special safety preca\
utions must be followed to
prevent injury. Always turn the ignition off when:
l Replacing ignition components e.g. plugs, coil, etc.
l Do not touch any part of the ignition system while the engine is running\
. This may result in a shock
and bodily injury.
Front suspension
Spring strut suspension with integrated shock absorbers and control arms\
linked to the support frame.
Power-assisted rack and pinion steering. Safety type steering column. Th\
e alignment specifications
apply to an unladen car but include fuel, coolant and spare wheel.
Rear suspension
Individual rear wheel suspension with longitudinal support arms, double \
link arms and track rods.
All specifications are subject to change without prior notice.

pg. 150 Electrical system
Electrical system
12 Volt, negative ground.
Voltage-controlled generator. Single-wire system with chassis and engine\
used as conductors. Grounded
on chassis.
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