2012 Toyota Avalon Owners Manual - Page 190
2012 Toyota Avalon Manual
Page 190 highlights
2-4. Using other driving systems To disable TRAC/TRC and/or VSC If the vehicle gets stuck in fresh snow or mud, TRAC/TRC and VSC 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.