It would be easy if it wasn't for the antitheft system. OBD2 is still the onboard diagnostic type btw, CAN bus is just the communication between modules. OBD3 is being used in some manufactures now, although the 2013 Elantra's are still OBD2.
thats kinda what i thought. do we really have an antitheft system? i mean it just seems like keyless entry. i'm going to try to lock the car with the key fob with the doorwindows open then unlock the inside and open the door if it opens without making noise thats usually how you can tell that it is just a keyless entry system.