I suddenly have an aggressive sounding alarm beeping every time I turn the ignition OFF (1990 LS400). This is NOT the same beep sound as when a door is ajar, or the trunk is open, etc... It's more like an alarm clock, three or four loud beeps together repeated a few times, then it stops. No lights are on the dash panel or anywhere else indicating what it is. Clearly it's alerting me to something, but what?
Maybe it's the sound one hears right before the bomb goes off :P