DEVELOPMENT : MS41.0 to MS41.2 Conversion

weremczuk81 · **Joined:** Tue May 17, 2022 4:59 pm **Posts:** 2

ba114 wrote:

https://www.romraider.com/forum/viewtopic.php?f=42&t=11338

Literally the first post, in the first sticky on this very forum

I uploaded full read from this post to my ms41.0 id41 and unfortunately DME died I took the second DME from E39 2.0 after uploading the version 1406464_WBSBG9321VEY75483_fullread.bin.zip I can read the rom but I can not upload partial or standard rom and the car also does not start

BohdanSkalyha · **Posted:** Mon Jul 18, 2022 8:02 am

weremczuk81 wrote:

ba114 wrote:

https://www.romraider.com/forum/viewtopic.php?f=42&t=11338

Literally the first post, in the first sticky on this very forum

I uploaded full read from this post to my ms41.0 id41 and unfortunately DME died I took the second DME from E39 2.0 after uploading the version 1406464_WBSBG9321VEY75483_fullread.bin.zip I can read the rom but I can not upload partial or standard rom and the car also does not start

Immo off or Synchronization ews new dme

Zviadi746 · **Joined:** Sat Jun 18, 2022 8:45 pm **Posts:** 14

Johnny_B wrote:

ba114 wrote:

Ok here goes.
I decided to invest some time in this overnight.

Attached is an MS41.2 partial, with all ms41.0 tables ported over.
I have retained the stock MS41.2 axis breakpoints, and interpolated/extrapolated the original ms41.0 values to fit within the MS41.2 breakpoints (using 'table rescale' within the 'maf scaling v2.4.2' application which can be found on these forums)

In this partial AC doesn't work on e36.

Here is proper file (checksum corrected)

mrf582 · **Posted:** Thu Jan 05, 2023 7:54 pm

I updated the first post to consolidate all relevant files from this thread. Please use them going forward for your MS41.0 to MS41.2 conversion. Please post if you have any issues running those files and I can update them as needed. Cheers.

Peter55 · **Joined:** Sun Oct 14, 2018 2:27 pm **Posts:** 5

Hello I have 1998 BMW Z3 and after flashing ms41.2 I have problem with check engine light, it's not working, plus I got CEL error (code 20). Is it possible to get going? I saw in electrical diagrams that BMW Z3 has CEL connected directly to ECU output, whereas E36 has it done by communication line.
Does anyone know if it can be solved?

lars-stritzel · **Joined:** Mon Apr 13, 2020 12:55 pm **Posts:** 2

Hello,
I converted MS41.0 to Ms41.2. I got some EWS Issue. It is posible to deaktivate ews, alternate? I have try RR Byte 8 Bit7 but its only starts ones. First time put battery in it start fine, but secound try not fire up. I had to do battery off (reset) than it starts ones. My ecu 1429861. Is it possible that my ms41 already bricked? EWS DTC is 209 EWS Message Error. Sorry form y bad englisch.
Best Regards

Vert36From99 · **Joined:** Sat Jun 24, 2023 4:41 am **Posts:** 15

Nicolaibb wrote:

Hi!

in addition to ba114 contribution to transfering maps from a m52b28 to MS41.2 partial

viewtopic.php?p=133695#p133695

i have done the same for a m52b25 323i i have transfered and rescaled the necessary maps Fuel, timing etc.
ive also modified the idle maps so it can idle.
fuel map is enrichnent with 3%
rpm limiter 7000 rpm

Logic disabled:
EWS
SAP

DTCs disabled
-11 (Tank Pressure Sensor (EVAP system))
-20 (CEL)
-35 (SAP)
-50 (3/2 way running losses valve)
-61 (Rear o2)
-62 (SAP)
-68 (Tank Venting Valve)
-77 (Rear o2)
-78 (Rear o2)
-79 (Rear o2)

would this steps work for a ms41.1 to ms41.2?

araquemoliveira · **Posted:** Thu Jul 25, 2024 10:33 am

Greetings fellow Bimmers. I intend to convert my ECU from 41.0 to 41.2, I have a BMW E36 328i EU AT 96. I read and re-read this topic 3 times to understand the process, but I was a little confused and I need to ask. If my ECU is 100% stock, are the conversion steps the same as in the first post?
1 - Full flash with the indicated file.
2 - Partial flash with the indicated file, corrected AC.
3 - Reset adaptations and DTC errors.
4 - Disable DTCs that do not belong to the version of my car.
Would it be this? Or do I need to copy values from some tables in my original rom? If so, which ones exactly?
I apologize for my English, I'm Brazilian.
Thanks.

madnjpn · **Joined:** Tue Nov 30, 2021 11:34 am **Posts:** 5

Wanted to say huge thanks to this development thread, my little backstory:
My car was initially M43B16, I swapped M52B25 DME is MS41.0 ID41 1432401, my both O2 sensors were dead so there were no additional functions in RomRaider to turn off unnecessary stuff related to these errors, so I decided to purchase QuickFlash and do a conversion to 41.2.

I read full/partial stock firmwares and started flashing using files in first post, unfortunately I made a mistake and flashed Tune file instead of full 256kb one, despite all Brick warnings I still flashed my DME (stupid me) eventually the program said that I bricked my DME and that I should write original .bin file right away without reseting DME which I luckily did and restored the original one without bricking anything.

After that I managed to flash 256kb firmware and then corresponding 2.3 partial. Reset adaptaions and errors and magic, the car started right away. I must say that when comparing stock and this firmware for 2.3 there is a noticable difference in fueling, I disabled all EVAP crap and error detection for various sensors that I dont need for driftcar and I must say that without o2 sensors the car behaves very nice, only thing is a bit lumpy idle after stopping the car needle drops a bit slow but its alot drivable than original MS41.0 firmware.

Make backups guys

RomRaider

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