Volvo 2001 S80 - Manual (Page 32)

2001 Volvo S80
· If the light remains on, have the STC system inspected by an authorized Volvo retailer.
Dynamic Stability Traction Control (DSTC)
The DSTC system performs all of the functions of the STC system. In addition, DSTC also applies the
brakes to one or more of the wheels to help maintain stability if a wheel begins to lose traction. The
system functions at speeds above 12 mph (20 km/h) and works on all four wheels, on any road surface.
When DSTC is active, brake pressure is regulated automatically and the brake pedal will move slightly.
If you press the brake pedal while DSTC is automatically regulating brake pressure, it will feel stiffer
than normal. A pulsating sound will be audible at this time, which is quite normal.
Switching off DSTC
DSTC comes on each time you start your car, and should be left on at all times. If for any reason the
steering wheel position or the front wheels are not properly aligned, DSTC should be switched off since
the system may receive incorrect signals.
When the LED in the button is on, this indicates that DSTC is switched on (the light will also come on if
a fault has been detected in the system). To avoid inadvertently switching the system off, the button
must be pressed for at least one second before DSTC is deactivated.
The symbol will come on to indicate that DSTC has been switched off. The system is automatically
switched on when the engine is restarted.
The DSTC indicator light ( ) will flash when:
DSTC is actively functioning to help avoid loss of traction.
The DSTC indicator light ( ) will stay on when:
The car is started (for approximately 2 seconds as DSTC performs a self-diagnostic test).
DSTC has been switched off by pressing the DSTC button in the middle console.
DSTC has been temporarily switched off due to high brake temperature. The system will automatically
switch on again when the brakes have cooled.
If the system has been switched off due to a fault. An authorized Volvo retailer should check the system.
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