How do you know the anti-theft system is operating on a 2004 Lexus Gx 470?

To determine if the anti-theft system is operating on a 2004 Lexus GX 470, you can check for a blinking red LED indicator on the dashboard when the vehicle is off, which signifies the system is armed. Additionally, when attempting to start the car with an unauthorized key or without the key fob, the engine should not start, indicating the system is functioning. If the alarm activates when a door is opened without disarming, that also confirms the system is operational.