I got JDM p30. They both look for ELD (pin#d10)and so dos p72. I think OBD1 and 2 ECUs look for it. My original pr4 obd0 did't
Tuesday I'm going to junk yards to look for OBD1 under hood fuse box(I have to get the hole thing,ELD is integrated into it but we'll see if i can cut it out )