ODB-II Information

[Daniel Burk]

Felix:  The phone numbers and address are as follows:

SAE
400 Commonwealth Drive
Warrendale, PA  15096-0001  USA

(412) 776-4841
FAX: (412) 776-2103

They also have a home page which is (I think) http://www.sae.org

The cost is (I think) $79.00 plus a handling fee that is usually around 
10% of the book cost.

You will find the connector blueprints, as well as description of the 
scan tool hardware, and a description of the protocol.  The protocol is 
the same for each manufacturer.  The emissions diagnostics information is 
also standard as per government mandate, but the neat stuff that you and 
I want to look at is not.  You can access engine RPM, vehicle speed, 
oxygen sensor, etc. rather easily.  There also exist about 256 different 
parameters that are added at the discretion of the manufacturer.  Even 
among GM, where each platform is designed by a different set of 
engineers, there are differences in what type of information is 
available.  Some platforms will break out calculated torque, whereas 
others will list torque converter slip.  THIS information, which is NOT 
required by government mandate is not really public knowledge, and 
changes from model to model.  

I have a table for MY1997 GM Quad 4 engines and it is rather extensive.  
I was authorized this information only because of a contract that I had 
with LAD powertrain.  It is not public information and is difficult for 
even GM engineers from other divisions to obtain.  Oh, wouldn't it be 
nirvana if they could standardize for a change!!


-- Cheers,

		Dan.
	[ '84 Trans Am - Currently under reconstruction ]
		(       Wanted: '87 - up 5.7L TPI motor with 
			attached '87 - up 700R4 transmission
			for a reasonable price.    )