OBD-I conversion to OBD-II
 

anybody done it? is it possible?

You would have to design a computer for it. Way too expensive and time consuming. This is rumored to be one reason why Mazda stopped importing the fd at the end of 95.

new wiring harness, ECU and control system.

why do people even want to know how to do this? it's pretty much impossible unless you have a year of free time on your hands and own an electronics shop.

false rumor. SAE standardized OBD-II in 1997 globally

why i'd like to do this? it's nice having PIDs & OBD-II rationality vs. OBD-I's sensing only complete failures.

Ever try tuning a car (with an e-manage, MAP ECU, etc) with OBD II era fuel trims? pain in the ass

mazda started switching to obd II only in cars manufactured mid '95 and onward so it may be true.

source? The Wiki says you're wrong..
http://en.wikipedia.org/wiki/On-Boar...ostics#History

And I've heard from a fairly reliable source that OBD-II was a big reason they pulled the plug on the FD in the US.

the wiki is correct again

OBD II came alongside other emissions regulations in 96. There's a reason why Ford discontinued the 5.0 in 96, Nissan detuned their 300zx TT, and Toyota could not get the manual tranny Supra TT smog certified in 96.

If all you want is datalogging, why don't you invest in a nice aftermarket ECU? It's going to be a lot (read, a whole lot) cheaper for you in the end and provide you with more control so you can do something with that data.

As much as wiki comes up on a google search, i seldomly do NOT trust random user inputted data.
It may have passed in 1996, but that means all cars around the world are mandated OBD-II systems sold as 1997 model year. Same as DOT & ASE mandated this year that ALL model year 2008 vehicles (cars & light trucks) must have a TPMS (tire pressure monitoring system)
I was told at ford/mazda factory school that sales was the major factor :dunno:


Datalogging & freeze frame data is only a partial reason.

Contrary to popular belief, America does not set the regulations in other countries. Just because all cars sold in America after 1996 had to be OBD-II compliant doesn't mean cars in other nations had to be OBD-II compliant. Same goes with TPMS. Just because the ASE and DOT say it is so for America does not make it so for anyone else. They have 0 power in any other country.

my biggest type-o evAr....i meant SAE = Society Of Automotive Engineers, which is a global organization

I guess you can do it. You'd need some way to interface with the Mazda ECU through the diag port. And then a HUGE table that then translates it to an ODB2.

I just don't understand why you'd want to go through all the trouble. Once you have the interface from the diag port to the ECU, why go the extra step and make it ODB2? The data is already there

This is one reverse logic I've ever heard of.. Most people who modify cars wants to get rid of this instead of putting it on... IS it because you are a Cali Smog Tech?? I'm just curious..

All cars sold in the US were required to have OBD2 effective Jan 1, 1996. OBD2 is not a global standard. You are chasing a dream. With all of your training i would think you would understand what it takes for a car to meet OBD2 standards.