Learned a few things about '96 and ALDL

[David Cooley]

If you go to the SAE's web site, you can order HS-3000 which is the 
complete protocol descriptions, messaging formats etc.  All except the 
stuff the manufacturer is allowed to keep proprietary.
OBD-II, in the useage that GM has, is 10.4Kbps VPW data.


At 08:44 AM 12/23/1999 -0500, you wrote:

>Well I finally got a chance to look through the contents of my 96 Camaro
>PCM.  I'm trying to communicate with it via ALDL.  Here is how it uses
>the ALDL:
>
>
>While the ALDL is used, it doesn't do much in the '96.  It only supports
>a few commands, and those commands only allow you to see a few things.
>For dumping data, it only supports Mode 1,message 0 and Mode 1, message
>4.  These messages give you the VIN, rail #, and some basic engine
>parameters.  The commands that allow you to dump the contents of the
>PCM, and the commands that allow you to download code have all been
>removed.
>
>Looks like I'm off to the world of OBD-II
>
>
>Just a little more data 'for the cause', if you are interested.
>
>Dave Hempstead
>dave_hempstead at agilent.com
>

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David Cooley N5XMT Internet: N5XMT at bellsouth.net
Packet: N5XMT at KQ4LO.#INT.NC.USA.NA T.A.P.R. Member #7068
We are Borg... Prepare to be assimilated!
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