Quote:
Originally posted by iroc409
the difference is the proposed specification included everything i stated above in the OBD IV system... not in a secondary system such as onstar. that means its and integral part of the ecu, you can't disconnect it.
as far as i know, every car manufactured today, and for the last few years has used an OBD system built into the vehicle (the manufacturer's own system that included a standardized agreement of what OBD must include/exclude).
|
This is true, but I have personally worked on plenty of cars that have either piggyback systems designed to bypass the OBD system on the ECU, or entirely new progammable ECUs...
It's currently super easy to bypass OBD for things such as speed governers, rev limiters, boost overpressure cuts, fuel and timing maps, valve timing crossover points, etc, so I don't see how integrating the big brother features into OBD will be a problem for people who don't want it.