digiboy wrote:VDC is different than traction control.
VDC will adjust engine power and/or brake individual wheels to reduce power to prevent understeer or oversteer during emergency maneuvers. This is in response to hard turning of the steering wheel and braking
TCS prevents wheel spin by sensing when one wheel is spinning faster than the rest - loss of traction. It responds by slowing that wheel down to try and get traction on that wheel and not kick the car wildly when traction returns (anti-skid).
If you are tracking a car and you are trying to follow a line - having VDC on will slow down the car even though you are in control. So "on" when driving around and you need to avoid that Prius that stops for no reason in a 45 MPH zone. "off" when you are pushing your car to the limit when Prius free.
Yes and no - the Traction control system is actually a part of the VDC system. The VDC system handles both the TCS (so if you are spinning off the line, the car will still act like TCS) and the VDC (the understeer/oversteer issues).
If you have VDC in your car, then you have TCS. The VDC system supercedes the TCS system. By hitting the button, you are turning them both off (though you can't turn either off completely...)