Well, how can you have a D15B in your car? The stock Vti came with D16W9 and Exi with D15Y3.
Would you please have a look again coz old D15B, the one that couples with this ECU, has different mounting geometry and different OBD protocol compared to your car.
Its for OBD2a D15B which is actually D15Z7 with 3 Stage Vtec P2J head.