When I am switching-ON my car a constant beep starts, which keeps making noise till I switch-OFF the engine. There's no alarm on the panel at all and drive is also normal.
Theres a continuous beep when switching-ON my car, remain constant while driving on 1998 Toyota Tercel
poss grd tab inside ign switch is malf call a mobile locksmith you may need a new lock cyl
Sounds like you have a warning "chime" or buzzer that is malfuntioning. Is the beep you speak of coming from under or behind the dashboard or somewhere else in your vehicle?
possible shorted buzzer or chime.