'96 LT-1 ALDL data stream

[David Cooley]

Ok..
96 Impala SS
Pin 9 is UART data (8192 baud ALDL) and is networked to:
PCM, Heater/AC controls (buick roadmonster only) Air bag module and ABS.
Pin 2 is OBD-II "class II" data, PCM only, 4 & 5 are ground, 11 is Buick 
Roadmaster only, goes to the Power Steering Control, and Pin 16 is +12


98 Camaro (My 99 disks don't have diagrams...)
9 is UART (ALDL 8192), PCM, ABS/traction, Air Bag.
2 is Class II OBD-II data, PCM only, 4,5 ground, 16 +12.
Looks like they kept it!  Whether the code still supports diagnostics via 
ALDL is to be seen... May be to link the other modules thru the PCM to 
OBD-II (All modules in the car have to be accessible thru OBD-II stream)


At 07:41 PM 12/21/1999 -0600, David wrote:
>David,
>
>I have the LT1 from a Cadillac Fleetwood.  I would appreciate any info you
>have.
>
>Thanks,
>
>David Edwards
>
>-----Original Message-----
>From: David Cooley <n5xmt at bellsouth.net>
>To: gmecm at efi332.eng.ohio-state.edu <gmecm at efi332.eng.ohio-state.edu>
>Date: Tuesday, December 21, 1999 10:13 AM
>Subject: Re: '96 LT-1 ALDL data stream
>
>
>|At 09:42 AM 12/21/1999 -0600, you wrote:
>|
>|>Unfortunately, I lost the program (a few computers ago), but the point
>|>is, I was using the same old MAX232 interface to the serial port to do
>|>it, and he was using the same type interface. I don't know about 1996
>|>cars, but 1995 GM F-bodies (Camaro Z28, Trans Am, etc) use the OBDII
>|>connector (though they're OBDI), and they use Pin 9 for serial data. I
>|>don't know if '96 uses this same pin or not (it's not a "standard" OBDII
>|>pin, so it's a manufacturer optional pin).
>|
>|
>|I'll check my Alldata tonight, since I have all disks up thru Q3-1999 and
>|see if there is any ALDL included in the 96 and up units.  I'll check
>|Camaro thru 99 and Impala SS for 97.
>|Any other vehicle specifics anyone wants checked out?
>|
>|Thanks,
>|Dave
>|
>|
>|===========================================================
>|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!
>|===========================================================
>|

===========================================================
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!
===========================================================