Quote:
Originally Posted by Just call me Sean
Doesn't matter how many words you write, '88 is OBDI. OBDI the manufacturers did it however they wanted. OBDII is when it was standardized for every vehicle to be read by the same scanner.
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I was a young Electrical Engineer still in school in 1988. Where were you?
Some history never hurt anyone.
GM computer diagnostics in 1988 were called ALDL by General Motors. Look at the service manuals.
The early Ford stuff was called EEC... I, II, III, and IV.
I doubt you'll find mention of OBD I in any 1991-1995 period literature outside of CARB emissions testing books and possibly internal automaker docs in reference to CARB standards.
Nobody in 1988 had heard it being called Onboard Diagnostics or at least outside of the California legislature. Calling anything before 1991 OBD I doesn't make it OBD I. An OBD I standard did not exist til 1991 and then only in California. Not sure when they passed the legislation but it was likely in 1990.
OBD II is a legislatively prompted industry standard. The actual legislation was a done deal well before the drop dead date in 1996. The North American governments gave SAE and the major automakers til 1996 to produce a standard for onboard automobile diagnostics and implement it. It was called OBD II because CARB had already named their California version OBD I in the 1990 legislation. I believe the EPA administered the federal government end of things in the United States. Not sure what Ministry it was in Canada but they have one.