Automobile Newb

I'm having some difficulty finding the ECU in my Beretta... My car's not running (it starts, but dies immediately thereafter). I tried reading the error codes a number of different ways but the computer's silent. So, with my lack of car knowledge, I thought it'd be worth taking a look at the Engine Control Unit... Problem is, I can't find it. Can someone help me out?

Thanks in advance for your time.