TRNW-2: TCM waveform on my scanner from a 08 Humer H3

[jbockus at hiwaay.net]

I agree with Art on Flagship one, I use NPC Automotive Computers in 
Houston and have for years, great service! 1-866-326-4227 ext 316 Karina

On 2025-08-07 12:57 pm, donnadan--- via trnw2 wrote:
> Tod, it is the 4L60e line, and the code is (P0961) Pressure Control
> Solenoid “A” Control Circuit Range/Performance issue. I got a TCM
> from Flagship One, and it seemed to work at first, but it is acting up
> again now. I was thinking that since these are used TCMs that are
> being tested and flashed, maybe I got one that was on the verge of
> failure. I have heard that it is a common issue for these Hummers.
> 
> -------------------------
> 
> From: "TRNW2" <trnw2 at trnw.net>
> To: "TRNW2" <trnw2 at trnw.net>
> Sent: Thursday, August 7, 2025 11:24:19 AM
> Subject: Re: TRNW-2: TCM waveform on my scanner from a 08 Humer H3
> 
> What transmission model does it have?
> 
> What is the code it is setting?
> 
> Tod
> On 8/7/2025 9:58 AM, donnadan--- via trnw2 wrote:
> 
>> I still have not received any replies on this issue. Anyone there?
>> 
>> -------------------------
>> 
>> From: "DAN OR DONNA STEWART" <donnadan at gilanet.com>
>> To: "DAN OR DONNA STEWART" <donnadan at gilanet.com>, "TRNW2"
>> <trnw2 at trnw.net>
>> Sent: Wednesday, August 6, 2025 12:30:07 PM
>> Subject: Re: TRNW-2: TCM waveform on my scanner from a 08 Humer H3
>> 
>> Okay, now it's going into default again. I am thinking this used and
>> recalibrated (for this VIN#) TCM is not working right. Any
>> experience you guys might have with this would be welcomed.
>> 
>> -------------------------
>> 
>> From: "TRNW2" <trnw2 at trnw.net>
>> To: "TRNW2" <trnw2 at trnw.net>
>> Sent: Saturday, August 2, 2025 3:21:37 PM
>> Subject: TRNW-2: TCM waveform on my scanner from a 08 Humer H3
>> 
>> Does anyone have an example of a scanner waveform, commanded and
>> actual? I am getting hash when the amperage changes. I can't
>> remember what this should look like. It came in under default, and I
>> could not manually make the amperage change with the scanner, so I
>> changed the TCM after testing the circuit through the PCS to TCM. It
>> still kept setting PCS code and default, so I changed the solenoid
>> from new style to old style, and it seems to work ok, but
>> occasionally I still see the code, even though it is not going into
>> default. Hope this makes sense.
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>> 
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> 
> --
> Best Regards,
> Tod Chretien
> TRNW Inc.
> https://www.trnw.net
> 
> This message was sent from the TRNW Technical Discussion Forum
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> TRNW Inc., 2825 Walnut Terrace, Modesto, CA 95355
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