2013 Toyota FJ Cruiser Owners Manual - Page 175
2013 Toyota FJ Cruiser Manual
Page 175 highlights
2-4. Using other driving systems To disable TRAC and VSC (2WD models and H2 mode [automatic transmission] on 4WD models) If the vehicle gets stuck in fresh snow or mud, TRAC 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.