I have a 2010 Prius with keyless entry and start. If the car is on and you close any door without the key in the vehicle it will make a loud audible beeping noise. It means if you jump out to get something from the trunk, it first starts beeping when the drivers door is closed and again when the trunk is closed. Pretty hard to miss.
If you try and lock the car while it is on (using the keyless entry), it will just produce a continuous audible noise and won’t lock - again pretty hard to miss. The same thing happens if you try and lock a key in the vehicle.
If you try and lock the car while it is on (using the keyless entry), it will just produce a continuous audible noise and won’t lock - again pretty hard to miss. The same thing happens if you try and lock a key in the vehicle.