ODB I or ODB II

Jeff Lange

Administrator
Staff member
Mar 29, 2005
4,919
5
38
38
Sunnyvale, CA
jefflange.ca
adampecush said:
that is also the way I understood it.

Also, I think that in most OBDII cars (well, both my nissans anyway) there is always some way to read the codes using the check engine light. Google search turned up the answer for me.

Although that being said, Toyota did have a couple of implementations before OBD2 for how to get codes, what codes were for what, etc.

They were all pretty similar though.
 

SupraRacer

Banned
Apr 10, 2005
255
0
0
41
St. Louis
OBD is good for troubleshooting, but its a pita to go around for tuning. all i hear from my DSM/EVO/STi friends is how they have to buy this couple hundred dollar electornic thing that tricks the computer into thinking everything is ok, otherwise it throws a code, retards timing, wont idle etc. They ask me what i do to get around it and say "i bought a toyota" If i want to remove the cat i do so, no O2 sensor trickery needed, if i want to install a piggy back, i do so, if i want to add a boost controller or upgrade the turbo i do so and dont have to buy expensive electronics to fool the ecu into thinking the car is still stock just so i can modify the outgoing signal... The Mk3 luckily follows the KISS method, Keep It Simple Stupid. So simple you cant fuck it up.
 

TurboStreetCar

Formerly Nosechunks
Feb 25, 2006
2,778
13
38
Long Island, Ny
i wouldnt mind a OBD 2 car, fool computer to think everythings good (witch is simple) with no CEL and when inspection time comes around you got nothing to worry about and only takes about 5 minutes.

I hate running the dyno, its always a guessing game if ill get it to pass, too many things to get screwed up and make you restart, its anoing.
 

Chrisfrom1986

Unauthorized Lurker
Jun 10, 2006
85
0
6
38
Fresno
nosechunks said:
i wouldnt mind a OBD 2 car, fool computer to think everythings good (witch is simple) with no CEL and when inspection time comes around you got nothing to worry about and only takes about 5 minutes.

I hate running the dyno, its always a guessing game if ill get it to pass, too many things to get screwed up and make you restart, its anoing.
What makes you think OBD2 cars dont get tested on the rollers?
 

Supracentral

Active Member
Mar 30, 2005
10,542
10
36
chrisfromda909 said:
What makes you think OBD2 cars dont get tested on the rollers?

Emissions are tested differently in every jurisdiction in the country. There is no federal standard.

For example, where I am in Georgia, the only places where cars are tested are in Cherokee, Clayton, Cobb, Coweta, DeKalb, Douglas, Fayette, Forsyth, Fulton, Gwinnett, Henry, Paulding or Rockdale Counties. The other 146 counties don't get tested at all.

Even then only the three most recent model year vehicles are exempt from emission testing each year. For registration in 2007, this includes all 2005 and newer model year vehicles. Additionally, vehicles that are 25 model years or older are exempt from emission testing.

In Georgia 1996 and newer cars (OBD-II) do not get tested on the rollers. Everything else, that has to be tested does.

So before you throw attitude at the poor guy, he might be right for his location. Not everyone lives in the People's Republic of California nor is subject to your draconian emissions standards. There are still about 15 states that don't perform auto emissions testing at all...

It's all 100% bullshit anyway and has NOTHING to do with the environment and everything to do with politics.
 

Chrisfrom1986

Unauthorized Lurker
Jun 10, 2006
85
0
6
38
Fresno
Supracentral said:
So before you throw attitude at the poor guy, he might be right for his location. Not everyone lives in the People's Republic of California nor is subject to your draconian emissions standards. There are still about 15 states that don't perform auto emissions testing at all...
I wasnt throwing attitude at the guy, just asking why he thought OBD2 cars were exempt. I understand that not every state does do emission testing, but those that do usually put them on the rollers. Only Cali has visual and BAR/CARB restrictions.
 

jetjock

creepy-ass cracka
Jul 11, 2005
9,439
0
0
Redacted per Title 18 USC Section 798
Many states now test using only the diagnostic connector. No gas analyzer or dyno is involved. California is not one of them. For those who live there go here and look at the program map:

http://tinyurl.com/2alhmh

Only the orange areas require enhanced (dyno) testing. Those in blue use the old two speed idle test. Those in grey require a one time idle test only when the vehicle changes ownership ie; the test does not have to be repeated thereafter until the vehicle once again changes hands. If the change is between immediate family members even that test is not required.

Vehicles 6 or less model-years old bought in California are exempt from biennial testing, while vehicles 4 or less model years old are exempt from testing upon change of ownership. Vehicles 1975 and older are exempt altogether. Unfortunately the 30 year rolling exemption was repealed so 1976 and on will always require whatever testing (or not) is specified for the area they're registered in.

Not that I'm defending the place but California uses the less stringent ASM test, a cakewalk compared to states which use the IM 240 drive cycle.

I agree it's all about politics, at least these days. It's about to get worse too. You won't believe what the People's Republic is working on. Expect a new federal standard to come out of it. Again, I'm not defending Cali but 11 other states are supporting them.
 

cuel

Supramania Contributor
Jan 8, 2007
1,536
0
0
Baytown, Texas
The difference between OBD1 and OBD2:
View attachment 18332

The one part that is circled is the OBD2 connector. All those other connectors are for different year, make and model pre-OBD2 vehicles. That's not all of them, either.
 
Last edited: