TRNW-2: 6t40 techm dead apparently

[Steve Everett]

  Correct,  but I suppose if he damaged the harness somewhere that may have
bricked the techm when he first cranked it ?

  Steve

On Wed, Jul 16, 2025 at 8:55 AM Justin Merritt <justincmerritt5 at gmail.com>
wrote:

> I re read your original post.  If i understand right, you hooked your hp
> tuner back up directly to the transmission.  If so, that would bypass all
> other data lines that may or may not be interfering.
>
> Justin
>
> On Wed, Jul 16, 2025 at 7:53 AM Steve Everett <severett61 at gmail.com>
> wrote:
>
>>    I'll mention it ,  I would like for it to be something like that,  as
>> it is now I'm wondering if I inadvertently did something wrong ?  but I've
>> done this dozens of times and never had this happen before ,  its just
>> puzzling
>>
>>   Steve
>>
>> On Wed, Jul 16, 2025 at 8:48 AM Justin Merritt <justincmerritt5 at gmail.com>
>> wrote:
>>
>>> Look at your data line communication routing.  Years ago my R&R guy
>>> messed up the plug to the electric power steering rack on an equinox 6t40
>>> and the transmission would randomly loose communication.  No crank no
>>> communication with scanner was our problem.
>>>
>>> Justin
>>>
>>> On Wed, Jul 16, 2025 at 7:44 AM Steve Everett via trnw2 <trnw2 at trnw.net>
>>> wrote:
>>>
>>>> Okay guys,
>>>>               I have no idea what happened, but I may have bricked my
>>>> first techm ?  although I don't see how ?  I was cloning a techm using hp
>>>> tuners, like I've done dozens of times, doing it on the bench, we ordered a
>>>> new GM techm I downloaded the software off the old one, and then
>>>> re-uploaded the program onto the new tech, the original was from a 2017
>>>> vehicle,  the last 4 digits of the part number matched the one we got from
>>>> from WIT, it was a new GM in a GM box , never opened,  the new techm
>>>> accepted the software and transfer was complete,  finished the unit, RnR
>>>> guy installed it, cranked it up and it threw a U0101 code,  try to
>>>> communicate and it wouldn't , no response, hooked my HP tuners up to the
>>>> unit,  no response ?
>>>>
>>>>    Never had this happen before ,  anyone got any ideas ?
>>>>
>>>>   Steve
>>>> This message was sent from the TRNW Technical Discussion Forum (trnw2).
>>>> You were sent this message because you have subscribed to our mailing list.
>>>> If you don't want to receive these emails from TRNW in the future, please
>>>> unsubscribe here:
>>>> https://www.trnw.net/unsubscribe.php?forum=2
>>>> TRNW Inc., 2825 Walnut Terrace, Modesto, CA 95355
>>>
>>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.trnw.net/pipermail/trnw2/attachments/20250716/df516275/attachment-0001.html>