Hondata

Yes it is a USA vehicle. I think all 88+ US Honda/Acura had an ELD, maybe not 87 and older but I'm not sure.

Yes, the CRX has a ELD and it is used for the charging system. It isn't 100% necessary but still something the ECU uses to control the alternator, it's something I would like to have if I can. Here are some FSM pages, there is also a page that describes the whole charging system and goes into detail ...

When I went from OBD0 to OBD1 in my CRX, I noticed my ELD doesn't work. I went through the FSM and found my problem is that at the ELD pin in the ECU plug should have 5V output KOEO, but it has no voltage from that pin. For the OBD0 FSM it says even with the ELD plug disconnected that wire should be ...