I‘d like to repair my interface unit, the black box in the trunk, 7EM or DAC2586 as Walmart offers one for $18, but that is far away and the others available to me now are more expensive.
If it’s just a transistor or the IC it might be a few cents.
Reason for asking, the trip computer shows everything but the fuel related data. The board is quite beautiful, but I have no idea whether there’s a way to test it (preferably without oscilloscopes). If someone here says that the IC is usually done after 30 years, I‘ll get my hands on one, it’s just that there’s barely anything to be found online on repairing it - all I know is that it converts the fuel injector signal into a trip computer format.
Thankful for any input.
This is the best I found and it gives pinouts; it says in his case the IC was broken, but how do I find out?