I have a 99 civic that has a y8 in it but y7 ecu and harness I have the y8 harness and ecu but the harness does not look like it will hook up to the ecu all plugs are the same and fits the ecu except one ( green plug ) any help will be appreciated.

 

OBD2a to OBD2b perhaps?

 

I take it there will be a jumper for that