3rd Generation Specific (1993-2002) 1993-2002 Discussion including performance modifications and Technical Support Sections.
Sponsored by:

OBD-I conversion to OBD-II

Thread Tools
 
Search this Thread
 
Old 12-06-07, 02:28 PM
  #1  
Punkrockin JUNGLIST

Thread Starter
iTrader: (2)
 
SINxSELEKTAH's Avatar
 
Join Date: Sep 2004
Location: Diamond Bar, CA
Posts: 601
Likes: 0
Received 0 Likes on 0 Posts
OBD-I conversion to OBD-II

anybody done it? is it possible?
Old 12-06-07, 03:02 PM
  #2  
Sponsor
iTrader: (41)
 
IRPerformance's Avatar
 
Join Date: Apr 2003
Location: NJ
Posts: 11,347
Received 317 Likes on 190 Posts
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.
Old 12-06-07, 03:12 PM
  #3  
Sharp Claws

iTrader: (30)
 
RotaryEvolution's Avatar
 
Join Date: Oct 2003
Location: Central Florida
Posts: 5,107
Likes: 0
Received 41 Likes on 40 Posts
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.
Old 12-06-07, 03:37 PM
  #4  
Punkrockin JUNGLIST

Thread Starter
iTrader: (2)
 
SINxSELEKTAH's Avatar
 
Join Date: Sep 2004
Location: Diamond Bar, CA
Posts: 601
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Rotary Experiment Seven
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.
false rumor. SAE standardized OBD-II in 1997 globally

Originally Posted by Karack
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.
why i'd like to do this? it's nice having PIDs & OBD-II rationality vs. OBD-I's sensing only complete failures.
Old 12-06-07, 11:58 PM
  #5  
rotorhead

iTrader: (3)
 
arghx's Avatar
 
Join Date: Aug 2004
Location: cold
Posts: 16,182
Received 429 Likes on 263 Posts
Ever try tuning a car (with an e-manage, MAP ECU, etc) with OBD II era fuel trims? pain in the ***
Old 12-07-07, 12:15 AM
  #6  
rotor rotor pow.

iTrader: (1)
 
sevensix's Avatar
 
Join Date: Mar 2005
Location: Southern CA
Posts: 3,170
Received 1 Like on 1 Post
mazda started switching to obd II only in cars manufactured mid '95 and onward so it may be true.
Old 12-07-07, 01:53 AM
  #7  
Top's always down
iTrader: (5)
 
SLOASFK's Avatar
 
Join Date: Dec 2005
Location: Spain
Posts: 4,841
Likes: 0
Received 1 Like on 1 Post
Originally Posted by SINxSELEKTAH
false rumor. SAE standardized OBD-II in 1997 globally
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.
Old 12-07-07, 02:34 AM
  #8  
rotor rotor pow.

iTrader: (1)
 
sevensix's Avatar
 
Join Date: Mar 2005
Location: Southern CA
Posts: 3,170
Received 1 Like on 1 Post
the wiki is correct again
Old 12-07-07, 03:39 PM
  #9  
rotorhead

iTrader: (3)
 
arghx's Avatar
 
Join Date: Aug 2004
Location: cold
Posts: 16,182
Received 429 Likes on 263 Posts
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.
Old 12-07-07, 05:42 PM
  #10  
ChumpCar**Apex of Failure

 
parid's Avatar
 
Join Date: Jul 2002
Location: Oregon
Posts: 259
Likes: 0
Received 0 Likes on 0 Posts
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.
Old 12-07-07, 08:10 PM
  #11  
Punkrockin JUNGLIST

Thread Starter
iTrader: (2)
 
SINxSELEKTAH's Avatar
 
Join Date: Sep 2004
Location: Diamond Bar, CA
Posts: 601
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by SLOASFK
source? The Wiki says you're wrong..
http://en.wikipedia.org/wiki/On-Boar...ostics#History
As much as wiki comes up on a google search, i seldomly do NOT trust random user inputted data.
Originally Posted by wikipedia
1996: The OBD-II specification is made mandatory for all cars sold in the United States.
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)
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.
I was told at ford/mazda factory school that sales was the major factor


Originally Posted by parid
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.
Datalogging & freeze frame data is only a partial reason.
Old 12-07-07, 09:24 PM
  #12  
Top's always down
iTrader: (5)
 
SLOASFK's Avatar
 
Join Date: Dec 2005
Location: Spain
Posts: 4,841
Likes: 0
Received 1 Like on 1 Post
Originally Posted by SINxSELEKTAH
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)
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.
Old 12-10-07, 02:39 AM
  #13  
Punkrockin JUNGLIST

Thread Starter
iTrader: (2)
 
SINxSELEKTAH's Avatar
 
Join Date: Sep 2004
Location: Diamond Bar, CA
Posts: 601
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by SLOASFK
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
Old 12-10-07, 02:43 PM
  #14  
Full Member

iTrader: (1)
 
pincusa's Avatar
 
Join Date: Sep 2004
Location: NY
Posts: 234
Likes: 0
Received 0 Likes on 0 Posts
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
Old 12-10-07, 04:32 PM
  #15  
DGRR 2017 4/26-4/30, 2017

iTrader: (13)
 
Herblenny's Avatar
 
Join Date: Nov 2001
Location: Alabama
Posts: 13,597
Likes: 0
Received 5 Likes on 4 Posts
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..
Old 12-10-07, 05:37 PM
  #16  
Civilization is crumblin

iTrader: (3)
 
Heisenberg's Avatar
 
Join Date: Nov 2004
Location: eL lAY
Posts: 2,279
Likes: 0
Received 0 Likes on 0 Posts
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.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Coochas
1st Generation Specific (1979-1985)
44
11-05-19 11:08 PM



Quick Reply: OBD-I conversion to OBD-II



All times are GMT -5. The time now is 07:02 PM.