Trans is encrypted as well now. I’ve already tried. It tells me I need the provider passcode.
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Fastest L5P
- Thread starter gmduramax
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Trans is encrypted as well now. I’ve already tried. It tells me I need the provider passcode.
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What sensors? I've seen several people say this, but unless they put some sort of strain gauge on the truck somewhere to measure torque, I don't see how they can calculate it.
That’s what I’m wondering. The torque the trans reads is off of the tune I thought. If it uses a calculation wouldn’t getting the truck stuck in mud and blowing the tires off make it think it’s making more torque and void the warranty?
I would like to know the answer to this as well.
As far as I can tell the "torque calculations" are all pre-written in the ECM and TCM tunes. The TCM will pull more fuel if you throw more power at it yes, but I don't believe it's because it's actually sensing the torque. I believe it's simply in reaction to it sensing the shift taking longer to accomplish or the slip rpm being higher then expected.
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Get that turbo cat off so we can make a delete , and move the sensor down stream a bit.
I've been told that uses the fuel rate, mass air flow sensor, input and output sensors. Just from the fuel rate and mass air flow sensor GM ought to know exactly how much horsepower the trucks creating so I'm sure they could calculate torque off of that. I'm not sure though, I'll bet Ben could tell us...
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With the module it shouldn’t know any more fuel is going into the motor. But the mass air flow I didn’t think about. I wonder if I can trick it with a slightly bigger intake tube.
Since the 6 speeds came out, the TCM has been doing it's own peak torque calculations. I believe it is based off of mass air flow, fuel rate, acceleration,cand several other variables. I remember reading a GM document many moons ago about detecting the addition of "power adders", and I remember checking the checksums in the ECM was 1 step, but there was also something in it for 06+ about going into the TCM, and looking for the peak logged torque. I believe the TCM had a preset expected acceleration value loaded into the calubration, and it would compare actual to the pre loaded one, and determine a theoretical peak torque value. It would explain why each body style had a slightly different TCM OS# to it for 06+ trucks when most all of the visible tables were the same for each OS. And the gen iv+ TCM are capable of doing so much more than just shifting.
ECM still knows how many injection events take place and for how long each was commanded open. So, I doubt the box can fool all the perameters GM can use to see fuel rate. Bigger intake tube would throw off the fueling tables, so it would probably make less power.
So your saying if you were to take one of these trucks and accelerate wide open down a very steep hill it would see the insane acceleration rate and think it's making some huge torque number? I'm not sure I believe that....
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Not if the box fools the feedback to the ECM. If it plugs in between the rail pressure sensor and the ECM how would the ECM know the rail pressure is higher? It wouldn't and therefore it would add a bit of fuel to each injection event and the ECM would have no way of knowing that. Now it is certainly possible that it could limit fuel from high EGTs which could potentially result from the increase in fuel rail pressure. But that could in theory be fooled as well.....
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I'm sure it has an averaging algorythim to it of some sort. There was also mention of it using taps to figure torque as well. If the taps vary from a preset amount by a large margin on all the taps, that could also indicate an increase in power.
That would explain why the lmls would get faster with just the solenoid mod in the trans.
It’s not far fetched. I’ve seen some of the back side tuning for factory vehicles and what is all entailed for a trans tune. I wish I could say more but that would get someone in trouble. What these engineers have to put in these electronics now is mind boggling compared to what we play with or was out just 5-8 years ago. These damn things are smart, very smart.
And yes, these guys take into account accelerating down a hill. Trying to do donuts, off roading, and just being a hooligan. I’m kinda jealous sometimes...
Even the infamous "DUMB" 01 OS can determine if tire slippage is occurring like during a burnout or just spinning the tires. I don't remember the PID I logged, but everytime I broke the tires loose this PID would change and show torque reduction request. With how much more advanced the Gen IV TCM is, nothing would surprise. Then to think of how much more advanced the T87 is, and it really is no surprise.
After the whole diesel gate VW scandal, it has started coming out just how much more STUFF is in the BOSCH ECM's code than most even thought there was. Over on the efilive forum a few months ago they posted a link that covered SOME of the stuff that has been uncovered inside the BOSCH ECM's coding. They even found the defeat code was written into ALL BOSCH ECM's, it was simply a matter of wether or not it was activated. There was speculation in one of the articles about the possible ramifications of dieselgate because of just how much HIDDEN code has been brought to light. These controllers are doing so much more now than just controlling there designated functions.
