Volvo 1999 S70 Owner's Manual - page 133
1999 S70 & V70
light will come ON when the system is off.
Stability and Traction Control(STC) - option on certain models
The STC system is designed to help reduce wheel spin by limiting power to the drive wheels if they
begin to lose traction at speeds below 25 mph (40 km/h). The system can be switched on or off by
pressing the button on the dashboard
(see page 25)
for at least a half second. The indicator light (
) in
the instrument panel will be ON when you have switched the system off. STC activates automatically
when the engine is started.
The
symbol will flash when the STC is actively regulating power to the drive wheels. Normal power
may be reduced at this time. This is normal as power is momentarily reduced to help keep the drive
wheels from losing traction and spinning.
The STC indicator light(
) will come on:
●
when the car is started, for approximately 2 seconds, as the system performs a self-diagnostic
test.
●
when STC has been switched off using the button on the dashboard.
●
If the system is temporarily switched off due to high brake temperatures. STC will automatically
restart when brake temperature has returned to normal.
●
If a fault is detected in the system. Consult your Volvo retailer if this occurs.
pg. 82 Winter driving
Cold weather precautions
If you wish to check your car before the approach of cold weather, the following advice is worth noting:
●
Make sure that the engine coolant contains at least 50 percent antifreeze: that is, 3.7 qts. (3.5 liters)
Volvo Genuine Coolant/Antifreeze. This gives protection against freezing down to -31°F (-35°C). See
section "Coolant". The use of "recycled" antifreeze is not approved by Volvo. Different types of
antifreeze may not be mixed.
●
Try to keep the fuel tank well filled - this prevents the formation of condensation in the tank. In
addition, in extremely cold weather conditions it is worthwhile to add fuel line de-icer before refueling.
●
The viscosity of the engine oil is important. Oil with low viscosity (thinner oil) improves cold-
weather starting as well as decreasing fuel consumption while the engine is warming up. For winter use,
5W-30 oil, particularly the synthetic type, is recommended. Be sure to use good quality oil but do not
use this cold-weather oil for hard driving or in warm weather. See section "Engine oil" for more
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