First, you need to know the name of the engine type, at least, check your car papers.
Second, take out the passenger side storage compartment out, that is where the ECU is usually located, it will have several labels (BOSCH, GM, Isuzu) and some info on the type it is.
But you could have started by looking at the injectors, duh! Denso injectors would have a Denso ECU, Bosch injectors a Boschundai ECU. Do your homework. And have a look at my thread, all the links are there, if you are in luck, the damos will be an exact fit.