2009 Toyota 4Runner Owners Manual - Page 216

2-4. Using other driving systems To disable TRAC and/or VSC (H4 mode on 4WD models) If the vehicle gets stuck in fresh snow or mud, TRAC or 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. n TRAC OFF mode Press the VSC OFF switch briefly. The slip indicator will come on. The system is in TRAC off and VSC on mode. Push the switch again to turn the system back on. 192