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CBB said:I still own one analog car. Sure, the mileage sucks, but I can start it, if need be, by pushing it... and nobody knows that I'm on the road.
MrAl:
One you reset a vehicle,the OBD system has to complete a "driving cycle" before the computer gives emissions a green flag. What that means, essentially, is that you can have emissions testing until that cycle is complete.
It usually consists of "warm up" and some steady state driving at constant speed. The "driving cycle" has been outlined in some service manuals.
The SAE sells the OBD documentation. For GM vehicles the TechII scanner is the "gold standard". It runs in the thousands of dollars and it can download firmware, set options and simulate signals. The TechII is being replaced and will basically require either a month subscription or 3-day passes for stuff like firmware updates. Access to security related stuff may require "real world" credentials.