[DWR]

Originally Posted by TDIwyse

I found the "SOLL" for boost in a separate location

Can you elaborate on "separate location", please.

[iaknown]

Will contribute more when I get time but my understanding of the terms including "WERT" is that they mean desired and the terms including "IST" mean actual, but I could be wrong on that.

I also remember finding 3 boost parameters all appearing to be "actual", however, they were very close to one another but different. Not sure what that was all about.....

In addition, just want to clear something up.... I thought the MAF was maxing out based on CAN logging software (Vagcom) but that may not be accurate. I haven't checked it with Test-O yet.

[TDIwyse]

Originally Posted by DWR

Can you elaborate on "separate location", please.

If you keep going down in the "Jobs" list you'll come to lines called:


current charge-air pressure, [mbar] (this is slightly different than the one in the Custom Group ... data was essentially the same though so I'm not sure what the difference is)
desired charge-air pressure, [mbar] (I think this is where I found the SOL parameter)
Boost temperature, [degree C]

And then there's a lot more good stuff down there relating to rail pressure, MAF, etc.

So far the data I'm getting has agreed very well with the Bav Tech data (rail pressures, charge pipe temps, desired boost pressures ... but Bav Tech was wrong about actual boost pressure according to the analog gauge and what TestO is showing).

[TDIwyse]

Originally Posted by iaknown

Will contribute more when I get time but my understanding of the terms including "WERT" is that they mean desired and the terms including "IST" mean actual, but I could be wrong on that.

I also remember finding 3 boost parameters all appearing to be "actual", however, they were very close to one another but different. Not sure what that was all about.....

In addition, just want to clear something up.... I thought the MAF was maxing out based on CAN logging software (Vagcom) but that may not be accurate. I haven't checked it with Test-O yet.

I noticed some of those boost parameters seem to be showing basically the same thing. I tried to use Google Translate to see what those various terms might mean and get this kind of result.... But I have no idea what "Boost is Worth" means.

[Mik325tds]

"Boost is worth"
Hahaha, that is absulotely hilarious. The translation of each word is correct, but in context it absolutely makes no sense.

So, here are the correct translations:
Wert: Value
Ist: actual
Soll: requested

[DWR]

Originally Posted by Mik325tds

"Boost is worth"
Hahaha, that is absulotely hilarious. The translation of each word is correct, but in context it absolutely makes no sense.

So, here are the correct translations:
Wert: Value
Ist: actual
Soll: requested

Here's a graph of data fresh from test-o. Left y-axis is in mbar, right is mV. X-axis represents about 8.5 seconds of data.

Spannung is the voltage from the sensor. "Wert" follows the voltage precisely. Ist_Wert appears to be filtered in some way. Soll is the target. You can see the other responses lag the target, as expected.

[Mik325tds]

I've been trying to find out the difference betweeen Stat_Ladedruck_Ist_Wert and Stat_Ladedruck_wert. I don't know what TestO is doing here, but EDIABAS only provides one job which is Status_ladedruck_ist.
Maybe they are actually referencing the same job and just get the data at different samples?

[DWR]

Originally Posted by Mik325tds

I've been trying to find out the difference betweeen Stat_Ladedruck_Ist_Wert and Stat_Ladedruck_wert. I don't know what TestO is doing here, but EDIABAS only provides one job which is Status_ladedruck_ist.
Maybe they are actually referencing the same job and just get the data at different samples?

Theory - Ist_Wert represents the Analog to Digital conversion that the ECU actually uses. TestO performs a formula conversion called _wert.

[TDIwyse]

Has anyone found how to log drive pressure? That's the last piece I'd like to find. As of now BMWhat is the only tool I've been able to look at that parameter with, but it's sampling rate is sooooo slow ...

[iaknown]

Originally Posted by TDIwyse

Has anyone found how to log drive pressure? That's the last piece I'd like to find. As of now BMWhat is the only tool I've been able to look at that parameter with, but it's sampling rate is sooooo slow ...

What's the term for drive pressure in BMWhat?

[TDIwyse]

"Exhaust gas pressure before turbine"

Example plot of the parameter attached.

[Mik325tds]

Originally Posted by TDIwyse

Has anyone found how to log drive pressure? That's the last piece I'd like to find. As of now BMWhat is the only tool I've been able to look at that parameter with, but it's sampling rate is sooooo slow ...

Sorry TDI, I looked through all jobs on all the d73x.prg but couldn't find anything pertaining to exhaust gas pressure.
I really wonder how BMWhat does it if even BMW has no way of reading it...
The only thing I found was the differential pressure reading for the DPF. Could you maybe disconnect the post DPF and use the pre-DPF reading then?

[DWR]

It just baffles me that there is a sensor and no way to see it in the ECU. Frankly, I find it hard to believe. But yeah, anyone that has the emissions stuff coded out can probably us those inputs for "other" sensors (OEM or otherwise).

[Mik325tds]

They probably thought it's not worthwhile defining an Ediabas job for it. However, I did find a job that's called Measuring block. That's a concept that VW uses quite a bit. It's a block of data the ECU spits out with multiple values in it. You just have to know how to interprete it.
TDI, do you have some way of capturing the raw data that goes through the interface while performing that request?

[TDIwyse]

Originally Posted by Mik325tds

Sorry TDI, I looked through all jobs on all the d73x.prg but couldn't find anything pertaining to exhaust gas pressure.
I really wonder how BMWhat does it if even BMW has no way of reading it...
The only thing I found was the differential pressure reading for the DPF. Could you maybe disconnect the post DPF and use the pre-DPF reading then?

Thanks for looking for it.

I had used the differential pressure sensor to check the back pressure on the exhaust system awhile ago, so I know that could work. However, I'm not sure of the linear "range" that sensor is good for, or how the DDE would respond to seeing such a LARGE "pressure differential" across the sensor and how that would impact engine operation (for example, would it see that as a blockage in the exhaust pipe and de-fuel? The original DDE map used that pressure signal to control things and I'm not sure what, if any, hooks are still in there).

Originally Posted by Mik325tds

TDI, do you have some way of capturing the raw data that goes through the interface while performing that request?

Are you thinking of splicing into that sensor and measure the raw signal and then try to use that to compare/contrast the logged readings? Or, it might be easier to splice into it and inject a small signal into that line and then look for a similarly changing reading on the "measuring block"...

[DWR]

Another option is to send the signal from the exhaust manifold pressure sensor through the DPF differential line.

Clearly, the first choice is to find the data location in the DDE. I'd love to assist in that, if anyone else is interested in pursuing this measuring block idea. Second choice is to inject signals into lines that have been rendered inconsequential via remapping. Last choice is external logging. Don't need INPA to do that. Just my 2 cents.

[iaknown]

...Or how about I ask the guy that writes the Test-O software and see if he can find it and add it? Don't go crazy yet guys.....

[ingenieur]

Try these:
ASMod_pTrbnUs 0x4D75
STAT_ASMod_pTrbnUs_WERT Exhaust pressure before turbine

ASMod_pHPTrbnUs 0x4D7D
STAT_ASMod_pHPTrbnUs_WERT Pressure in front of turbine of the high pressure level

Edit:
Those are for the N47T ecu
-----------------------------


For the M57Tu2

ASMod_nTrbCh 0x0C86
STAT_ASMod_nTrbCh_WERT - aktuelle Drehzahl des Turboladers (turbocharger speed - rpm)

ASMod_pTrbnUs 0x0C94
STAT_ASMod_pTrbnUs_WERT - ASMod_pTrbnUs - (Exhaust pressure before turbine)

ASMod_pHPTrbnUs 0x0C9C
STAT_ASMod_pHPTrbnUs_WERT - Druck vor Turbine der Hochdruckstufe (Pressure in front of turbine of the high pressure level)

[TDIwyse]

Thanks, will look for those. Do you know which "jobs" those are listed under?

[DWR]

Originally Posted by iaknown

...Or how about I ask the guy that writes the Test-O software and see if he can find it and add it? Don't go crazy yet guys.....

He's working on it for me, already!

[Mik325tds]

Excellent. That's definitely the best way to go. Who knows what other valuable signals he might discover there...?

[DWR]

Originally Posted by Mik325tds

Excellent. That's definitely the best way to go. Who knows what other valuable signals he might discover there...?

Actually, he showed me how to do it myself. Well, I need to test it.
I found "STAT_ASMod_pTrbnUs_WERT" and "STAT_ASMod_pHPTrbnUs_WERT".
If can dig myself out of the winter storm and get to the barn tomorrow, I'll give it a go. Let you all know about my success - and, of course share how-to.