Re: What model ECM is this ?

[Team ZR1 <teamzr1@teamzr1.com>]

I do not know if we are all on the same page, so to be clear,
the ZR-1 does not talk about a ALDC they have a DLC ( Data Link Connector )
The G.M service manual has a secton on "scan tool not communcating" and part of
the
test flow is related to the CCM.

Since I am a dealer for the Diacom Product ( by the way I sell the Diacom Plus
much cheaper then most do )
I will talk to rinda this week and find out more for I talked to them before
and was told then it would not work
with this racecar.

John

"Andrew K. Mattei" wrote:

> >Being the ECM is mounted upside down so that the E-prom door is on top for
> >quick chip changes
> >I removed the ecm and sure enough there is a tag on the top.
> >
> >It read  SERV No 01228331
>
> I received email from a fellow (Hans) in Switzerland the other day, who was
> looking for calibration software for his 1990 ZR1. He had the same ECM part
> number (1228331). I couldn't find any cal software (Tunercat didn't have
> any), but The Turbo Shop (http://www.ttspowersystems.com) has software
> available for download on their web site that can scan both the 90-92 ZR1's
> and the 93-95 ZR1s (provided you have an RS232 to ALDL adapter ;^) ). Since
> you list your ECM as a 1990-1992 model, but your car is a 1995, perhaps
> entering the VIN in Diacom makes Diacom configure itself for a 1993-1995
> model, which would likely not communicate.
>
> And as for your later email, in which you list the alternate controller
> computer that talks to all the ABS, etc. stuff, that one's not required by
> Diacom to properly communicate. It's trying to talk to the ECM alone.
>
> Have you checked the actual pinouts on the ECM to see which line is the
> "serial data" line, and tried connecting to that? If you do indeed have a
> 1228331, you *ought* to be able to talk to it!
>
> Food for thought...
>
> Andrew