2010 Toyota 4Runner Owners Manual - Page 281
2010 Toyota 4Runner Manual
Page 281 highlights
2-4. Using other driving systems Disabling the TRAC (TRC)/VSC systems (4WD models) If the vehicle gets stuck in fresh snow or mud, the TRAC (TRC)/VSC systems may reduce power from the engine to the wheels. You may need to turn the system off to enable you to rock the vehicle in order to free it.