|Nissan Skyline GT-R R34|
First off, you need a bit of a primer on OBD II. OBD is OnBoardDiagnostics. The II means version 2, the second. http://www.obdii.com/background.html
"OBD-II, a new standard introduced in the mid-'90s, provides almost complete engine control and also monitors parts of the chassis, body and accessory devices, as well as the diagnostic control network of the car."
|OBD II connector|
So why do we have OBD II? Blame Los Angeles. Blame California.
To combat its smog problem in the LA basin, the State of California started requiring emission control systems on 1966 model cars. The federal government extended these controls nationwide in 1968.Congress passed the Clean Air Act in 1970 and established the Environmental Protection Agency (EPA). This started a series of graduated emission standards and requirements for maintenance of vehicles for extended periods of time. To meet these standards, manufacturers turned to electronically controlled fuel feed and ignition systems. Sensors measured engine performance and adjusted the systems to provide minimum pollution. These sensors were also accessed to provide early diagnostic assistance.At first there were few standards and each manufacturer had their own systems and signals. In 1988, the Society of Automotive Engineers (SAE) set a standard connector plug and set of diagnostic test signals. The EPA adapted most of their standards from the SAE on-board diagnostic programs and recommendations. OBD-II is an expanded set of standards and practices developed by SAE and adopted by the EPA and CARB (California Air Resources Board) for implementation by January 1, 1996.
So the whole purpose of OBD II is to minimize smog emissions, in LA. LA expanded to federal(EPA) .
All cars built since January 1, 1996 have OBD-II systems. Manufacturers started incorporating OBD-II in various models as early as 1994. Some early OBD-II cars were not 100% compliant. <Click here> to see the dates OBD-II started being included on specific makes and models.Not ALL cars. All cars originally sold in the US from January 1, 1996 have OBD II systems. Cars produced for markets other than the US don't have OBD II. Japanese cars, European cars unless they were made for the US, don't have OBD II. In fact, Japan didn't pick up similar standards until 2003, which is why the Toyota Supra, Nissan Skyline GT-R, Mazda RX-7, Nissan S15 all stopped being sold in 2002...
OBD II is a deal breaker. Unless you can foot a bill in the $250k+ range to develop a system, you should just keep dreaming, and playing the lottery. Give me a buzz when you hit your numbers. Even once you get the system working, expect the EPA, and the ARB if you are in California to check and recheck the system until they are satisfied it works correctly.
|FTP testing an R33 GT-R|
More OBD II Links and Information.
OBD II Technical Library.