I want to check what's wrong with my car, but the problem is that we weren't able to connect it to any diagnostic tool. The car is H22A swapped and the first owner said that he had to downgrade the ECU to OBDI in-order to run the engine(the car is OBDII). My question is: is there a two pin connector which I can jump and show me engine codes through the odometer? If not, what can I do to check what's wrong in the car and all?