What does this mean on my car?

Q: For some reason it doesn't say in my car manual, but there is this button near my hazard lights. It's the symbol of a car's axel connecting its four tires, with an x in the middle of the axel. Whenever I press this, this light shows up on my dash as well as a light that reads "VSC TRAC". What does this do?
I don't think it's traction control because there is already a traction control light on the dash, and a separate traction control light.
I have a 4x4 SUV.
(2010-11-03 18:43:58)

A: I hope this helps.
From Toyota site listed below:
"Vehicle Stability Control (VSC)
The VSC system electronically monitors speed and direction, and compares the vehicle's direction of travel with the driver's steering, acceleration and braking inputs. VSC can help compensate for loss of traction which can cause skids. It utilizes some components shared with the Anti-lock Brake System (ABS) and an electronically controlled engine throttle as well as a dedicated computer and sensors providing information to the VSC system. These include a yaw rate sensor, a G-sensor and a steering angle sensor. When VSC is active, a warning beep tone and instrument panel warning light indicate that the system is functioning. In many cases, VSC reacts well before the driver is aware of a loss of traction. As with other safety technologies, such as anti-lock brakes, it is important to drive safely, since Vehicle Stability Control cannot defy the laws of physics, nor can it provide more traction than exists in a given condition."


"Traction Control (TRAC)
The sophisticated Toyota system is an all-speed design that utilizes both brake and engine throttle control. TRAC helps to avoid slippage of the driving wheels by slightly applying the brake on a slipping drive wheel and reducing the throttle to maintain traction according to the road surface conditions. The system eliminates the need for a subtle accelerator pedal operation and helps ensure vehicle control when starting or accelerating on slippery roads"