Ah! Makes perfect sense.mikey6331 said:I had the same thing happen in my last car after I had a lo-jack keyless entry installed.
The tone is the same tone the car makes if you leave the headlights on.
If you watch, the ding matches up with the parking-light flash.
So, the keyless-entry flashes the lights, the car goes "oh, the lights are on, door's open, key's out of the ignition" and dings to tell you.
Bit of a logic 'bug'.