Anyone ever noticed that the D10 pin on the ECU connector is missing? It's supposed to be the ELD signal. I checked two 93 Civic Si hatch's and then both had the D10 wire missing! Every wiring diagram I've seen shows this pin as GRN/RED: ELD UNIT (U/H F/B). Has anyone seen this before? Could this be why my H22 swap keeps throwing code 20. BTW what U/H F/B mean?