read in bdm or serial

Then I have a question to ask you. I'm starting to immerse myself in the world of mapping, and as the first thing I wanted to extract the file from the ecu of my car was mapped a long time ago, and let you see soon as I get the rights because according to me was not very well made.
my car is a Fiat Bravo, first series 1.9 jtd 105 horses and I think that my be to do the tour as it has the socket odb.
the question is this, how do I know if a ecu I'll have to read it in bdm or if you can do it in serial?
From what I understand it is better to work on the bench even if you can do this in a serial right?

I have to say that I speak from ignorance on the matter I am now starting to experience and I don't baby food ready or things like that because I want to arrange to attend courses, I ask only for starting to get a few straight to begin to make a little bit of experience!
thanks

you have a bit of confusion..... yours is an edc15 then not expected to read bdm(scheduled for edc16).
then to make it to the tour you should use a eprom programmer type wellon,but it might be a more,
the edc15 does not have the address of the write lock in the obd recoverable only with open as some edc16,
so if you have problems in writing,with file read previously and a wellon the recoveries.
your and rewritable through the line k of the diagnostic socket, 3-way of the old fiat.surely your tool will have the info to operate on your car.

ah here is perfect!
the most confusion I'm just starting to learn.
you my is an edc15 then the address of the work bench is necessary only when you cannot do it via serial right?
however, I'm still waiting for the galletto v54 I ordered that to start and hand in hand comprero what I need but still I have not got then yet I have not tried to do anything.

but the cock has the line k of the diagnostic socket?!?!

here is this I do not know, however, because I need more for the cars with obd and then I took only the cock for now,other then I attrezzerò floor plan, however you'll see as soon as I get there.

if your's is the first in the series not taken a diagnostic, but the diagnostic socket, 3 threads named just "fiat" from which you can always read and write to your machine, just make an adapter and you're good to go, with the v54 can do it safely.

thanks ugoboss, you have the socket type fiat adapters I have them already.
I was interested to know the read/write bench is one of the necessary steps only when you cannot by a plug-in diagnosis, or choice of working method.

the more secure is always to have a backup of the ecu, x less widely used, then if you have a tool that works well you can only go via serial.

the edc15 you are in boot mode or am I wrong? in the instructions of the v54 is the pin out
should not serve a eprom programmer

u can read it by OBD