Converting an MSS54/HP into an MSS54HP CSL (H-bridge)

[simonnim]

This is pretty simple stuff, just gotta pay for a hot smog every couple of years.

Unless you know someone for cheap.

[nextelbuddy]

What happens if you switch to HP non-CSL software?

Haven't tried that yet since I need CSL software for my setup. May try that later just to see what happens

[EthanolTurbo]

This is what I'm worried about too...otherwise I'd have swapped to airbox and 200 cell race cats etc. I still want to drive it on the road and have no issues selling it.

This is pretty simple stuff, just gotta pay for a hot smog every couple of years.

[Slideways]

Well I can confirm for me that hp converted DME with CSL software also shows unavailable for emissions monitors readiness

Probably won't pass emissions here in Georgia like that.

Other than that, the DME works fine and starts my S54 no problem

What happens if you switch to HP non-CSL software?

[simonnim]

This is what I'm worried about too...otherwise I'd have swapped to airbox and 200 cell race cats etc. I still want to drive it on the road and have no issues selling it.

[nextelbuddy]

That's interesting. I'll definitely have to try that and see if I see a difference with readiness on CSL versus non-CSL on HP converted DME.

Well I can confirm for me that hp converted DME with CSL software also shows unavailable for emissions monitors readiness

Probably won't pass emissions here in Georgia like that.

Other than that, the DME works fine and starts my S54 no problem

[nextelbuddy]

A forum member here with a non-HP to HP conversion went back to standard software from CSL and didn't have any issues with readiness.

That's interesting. I'll definitely have to try that and see if I see a difference with readiness on CSL versus non-CSL on HP converted DME.

[Slideways]

So just curious, at this point we have this thread with tons of amazing information that allows people to convert standard MS54 DMEs into MS54 HP DMEs

Are we at the point now where we can almost officially say that conversion of this nature is confirmed to break emissions readiness monitors?

Reading from this thread here it looks like two or three people confirmed they all had the same issue after converting the standard MS54 to HP and their emissions monitors just seen not available and to pass emissions they had to purchase another stock untouched DME just to pass emissions.

https://nam3forum.com/forums/forum/m...ions-monitors/


I have three standard MSS54 DMEs that I converted to HP and I planned on selling them but I'm not going to sell them now because if they can't pass emissions they're useless to people that have daily drivers So it looks like you can really only be used by maybe E30 and E36 people with S54 swaps or E46 m3s that live in states/counties that don't do emissions checks.

A forum member here with a non-HP to HP conversion went back to standard software from CSL and didn't have any issues with readiness.

[nextelbuddy]

So just curious, at this point we have this thread with tons of amazing information that allows people to convert standard MS54 DMEs into MS54 HP DMEs

Are we at the point now where we can almost officially say that conversion of this nature is confirmed to break emissions readiness monitors?

Reading from this thread below, it looks like two or three people confirmed they all had the same issue after converting the standard MSS54 to HP and their emissions monitors just say not available and to pass emissions they had to purchase another stock untouched DME just to pass emissions.

https://nam3forum.com/forums/forum/m...ions-monitors/


I have three standard MSS54 DMEs that I converted to HP and I planned on selling them but I'm not going to sell them now because if they can't pass emissions they're useless to people that have daily drivers So it looks like you can really only be used by maybe E30 and E36 people with S54 swaps or E46 m3s that live in states/counties that don't do emissions checks.

[sapote]

Thanks.
So it’s the system 5v for most of the chips including the processor and 2 Flash memory chips. I thought the board needs a 5v switching regulator and surprised to see it has a linear one.

[heinzboehmer]

Anyone with the DME box opened, can you try to read the part number print on the chip in red circle in pic below? The DME I try to fix, the chip has no marking to read.
Thanks.

https://nam3forum.com/forums/forum/main-forum/e46-2001-2006/231791-help-identify-component-on-m3-dme-circuit-board?p=233161#post233161

[sapote]

Anyone with the DME box opened, can you try to read the part number print on the chip in red circle in pic below? The DME I try to fix, the chip has no marking to read.
Thanks.

[heinzboehmer]

Did you just search for "D3 1C 12" to find the address?

Yep. Also cross referenced with the XDFs

[nextelbuddy]

Yeah it'll be in a different spot for the regular HP partial. Looks like it's at 0xCA44 for J469.

Ah ok So each software version may have to be tweaked on a case by case basis as that scaling value is going to be in different places. Got it thank you

Did you just search for "D3 1C 12" to find the address?

[heinzboehmer]

when i try to do this in a HP NON CSL tune file (211323002701-J469). searching for 0xC476 gives me nothing but FFFFF section.


What are we supposed to do if we convert an non HP to HP DME but dont want to run it as CSL but just a normal HP DME. how can we change the onboard BAR sensor scaling? is there another address for the non CSL files?

Yeah it'll be in a different spot for the regular HP partial. Looks like it's at 0xCA44 for J469.