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RE: Any other GM comms speeds?



OOOOHHHH...
Just been perusing the Vauxhall Electronic Parts Catalogue, and found 
something of interest. The 16188269 is fitted to the Vauxhall/Opel Corsa 
with the C14NZ engine from Model year 1993 onwards. The full description 
is...

"UNIT, CONTROL, THROTTLE BODY INJECTION (IDENT NC) (EXCL. AIR CONDITIONING) 
(EXCLUDING AUSTRIA) (EXCLUDING IMMOBILISER) Note: Used with manual 
transmission."

I'll see if my Tech1 can select this engine type tonight.

Cheers,
Malcolm Robb, LC 0112G

-----Original Message-----
From:	Ross Myers [SMTP:ponty@axis.jeack.com.au]
Sent:	Wednesday, June 14, 2000 10:45 AM
To:	GM ECM List
Subject:	Any other GM comms speeds?

Hi all,

I've been playing around with a 16188269 ECU (Picture is at my web page),
these are strange in that they have no Flash or Memcal, it was built in
1995. The CPU seems to match the HC11 'E' series so I guess it may have 20K
or so of OTP.
Anyway, I'm want to dump the memory contents out via a Mode2 request, only 
I
cannot get this thing to talk to me!!, the wiring diag shows a
Bi-directional Serial Data line on the ALDL, but no matter what I.D byte I
use for a Mode1 request I get no response (I've tried $01 - $FE).
First thing, the ECM has no 64606 I.C fitted, instead the serial data runs
through transistor/resistor combinations to the CPU Rx/Tx pins.
Secondly, this ECU is used in the U.K on Opel & Vaxhuall cars as well.
So, did GM use another speed other than 8192 for bi-directional comms?.

Thanks,
Ross Myers
Melbourne, Australia
E-mail : ponty@axis.jeack.com.au
Stuff : www.jeack.com.au/~ponty
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