Quote:
Originally Posted by DieselPaul
On a BMW and some others SES = Check Engine.
However, my 1992 Dodge has a check engine, and a service soon light. The service soon light comes on at random markers in the ECU that are triggered by OBD1s very rough guesstimate of mileage. There is a list of definitions somewhere, I think the major service points were listed in my owners manual. The 120,000 mile service (light came on at like 133,000 on my truck) was something like "change ignition components, clean EGR tube, clean throttle plate" and then I used my friends snap-on Modus with OBD1 software to reset the light.
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It's a Chevy G20 van, MY 1989 so I am THINKING it is similar the slightly older F body cars with TBI. Only CMAC can tell me if it is TBI. If it is there might be hope to do diagnostics.
http://www.ih8mud.com/tech/tbi/wireTBI-1990b.gif
If it uses a 1227747 ECM which is capable of being tuned, you might be able to really get some serious data off it.
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