Open ms41 OpenMS41 is currently being transitioned from the old Google Site format to the new one. Still, the 41. MS41 can be seperated into three major sections, the bootloader, the program code, and the calibration data. (Optional - if you want to use cable with newer BMWs) 3. 2 variant. 2a. Contribute to OpenMS41/pyms41 development by creating an account on GitHub. ) 1 Ignition coil Cyl 2 2 Ignition coil Cyl 4 3 Ignition coil Cyl 6 5 Fuel injector Cyl 2 6 Fuel injector Cyl 1 8 Air Flow Meter (HFM) 10 Coolant Temperature Sensor 11 Tank Pressure Sensor Control Bits are easily modified using MS41 ECU Portal. 2 is considered to be the best of the bunch, and many people who have lower numbered versions of DMEs flash the entire 41. - RomRaider. ftdichip. 5 updated 4/2/2022 -Performs partial flashes in under ~10 seconds -Full flashes (program and tune section) in ~1 minute. The MS41. 1/MS41. Right-Click "Help => Install FTDI USB Drivers" Modify - VAG-COM KKL cable modification for flashing We would like to show you a description here but the site won’t allow us. K-DCAN cable will work out of the box for both reflashing and diagnosing via EDIABAS BMW software. ECU Cable 3. Some content will be missing until it's finished We would like to show you a description here but the site won’t allow us. Engine Load (mg/stroke) is a representation of how much air the engine is consuming per minute. Once this WBO2 sensor is connected to 'Front O2 Bank 1' and 'Single Channel' O2 Mode is selected in MS41 ECU Portal, Narrowband Emulation can be enabled to run your stock ECU off a wideband. Repositories pyms41 Public Utility library and CLI for MS41 ECUs Python 6 BSD-2-Clause 1 0 0 Updated on Jun 26, 2020 RomRaider ECU Definitions for Siemens MS41 created from the prior versions hosted on RomRaider and MS41Portal to enable the ongoing development of these defintions. Turn the ignition on, and use MS41 Quickflash to read/write the ECU. Bootloader Section. Open cable and solder pin #7 and #8 together. I / O Controls settings: #C0 = RXLED #C1 = TXLED #C2 = PWRON #C3 Load / Airflow Limits MS41. 0 versions 1744598, 1427703, 1744897, 1427704 and 1429999 are NOT flashable. x which are these higher limit versions. 1 ID60 and a couple of other versions are not too far behind. The calculation of injector pulsewidth is proportional to this. Oct 20, 2025 · Can someone confirm this is Normal? Load values seem off. 2 tune into their DME to gain its features. These can be used to program another DME or update your existing one. x and MAF. Mar 8, 2021 · Here is a listing I made of all the MS41 software versions included in the SP-Daten files. Comprehensive Diagnostics: Read and clear diagnostic trouble codes, view and reset adaptations. This is typically mounted to the strut tower as pictured below. 3 also adds two new variables to datalog called Load. Invert RI # and DSR # signals to fool the detection of battery and ignition, in order to be able to encode. 2) for the purpose of providing the hobbyist with the means of tuning and calibrating their own ECUs. 2) for the purpose of providing the hobbyist with the means of tuning and Nov 23, 2024 · Open your hood and find your 20-pin diagnostic port on the passenger side of your engine bay near your ECU. The DME MS41. Check the MAF Scaling and Load axis for the Fuel/Timing maps to ensure they are We would like to show you a description here but the site won’t allow us. (E34, E36, E38, E46. The MAF Scaling for 1024 kg/hr Mode is 'read-only' for MS41. EWS Delete: Remove the immobilizer with the click of a button. 4. OpenMS41 provides a shared repository for understanding the Siemens MS41 family of ECUs (MS41. Cruise tuning - O2 Heater duty table? Tuning via RomRaider RomRaider is a free, open source tuning suite created for viewing, logging and tuning of modern Subaru Engine Control Units and some older BMW ECUs (MS41/42/43). 1, and MS41. BMW M52TU and M54 petrol engine fault codes. Enable Write Access OpenMS41 is currently being transitioned from the old Google Site format to the new one. 5 4. com/Drivers/D2XX. Open Loop Enrichment - Detection uses Throttle Position to determine if OLE should be activated. 0, MS41. 2 OBD2 tuning project was started by me (Abhishek Shinde) in August 2012 and slowly worked on over the years Apr 2, 2022 · Purchase ($25) - MS41 Quickflash by Bimmer Tuning Tools Current Version v2. LogViewer for MS41 - Free software for graphing and analyzing CSV We would like to show you a description here but the site won’t allow us. OBD2 USB Cable with FTDI FT232 chip because it is more reliable and supported by MS41 QuickFlash. Go to Tools Menu -> Read and Parse a. 0 to MS41. 1 electrical interface (pdf) Diagnostic Trouble Codes (DTC) 80C166 user manual (pdf) Oct 26, 2025 · Page 1 of 1 [ 7 posts ] Board index » Engine Management Systems - Analysis and Tuning » BMW » DME Tuning » MS41 Tuning All times are UTC - 5 hours [ DST ] Who is online Users browsing this forum: No registered users and 0 guests You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in We would like to show you a description here but the site won’t allow us. 2 and MS41. Datalogging Software RomRaider Logger (PC) TunerPro Logger (Android Phone) 3D OBD Logger ( PC) Data Analysis Software MegaLogViewer HD - Low cost full-featured software for graphing and analyzing CSV datalogs. 3 code is sent in a proprietary encrypted format which only MS41 QuickFlash can upload to the ECU/DME. There are lots of ways of building a bench rig depending on how tidy you happen to want to be. Download MProg 3. 3 code uses Engine Load to determine if OLE should be activated. Once you unplug the MAF, you will see a CEL and DTC 8, but the AlphaN tables will get used. This program can be used to quickly get a Windows PC setup and updated for MS41 Tuning by performing semi-automatic software setup of the following: - Java. Tools Required: - Wire cutters of some fashion - Soldering Iron - Smallest flat head screwdriver from a micro screwdriver 1. 2 Conversion Support Thread MS41. Note: Euro ms41. 0 ECU Hardware only supports two (2) sensors which can be any combination of the ones shown below. Lightning-fast Flashing: Flash your ECU in seconds, not minutes! Effortless Use: Our software automatically corrects checksums and patches software versions, making flashing a breeze. 3 supports the replacement of your stock O2 sensor with an aftermarket wideband sensor that ouputs 0-5V. OpenMS41 provides a shared repository for understanding the Siemens MS41 family of ECUs (MS41. We would like to show you a description here but the site won’t allow us. -Partial reads in under 5 seconds and full reads in ~30 seconds -All checksums including program To reflash your ECU you need the following: 1. 1 due to a software limitation with RomRaider. AlphaN + Load Smoothing Open Loop Enrichment -precisely control which cells from the main fuel map are used during Closed Loop or Open Loop Datalogging Log most parameters at 15 samples per second INPA and standard MS41 compatibility maintained. MS41 Quickflash 2. 2 Conversion Support Thread The MS41 features rounded corners and a customizable illuminated ring with audible signaling. 3. A small custom electrical circuit may be needed: - 12V to 5V voltage regulator - SPST switch Each 80C166 pinouts (pdf) 80C166 datasheet (pdf) Pinouts and electrical for ms41. The durable design suits sterile, wash-down applications such as surgical, wash-down, clean room and pharmaceutical environments. RomRaider 4. VAG-COM cable needs to be modified. Utility library and CLI for MS41 ECUs. 3 ECU code supports customizing a few switch inputs that may no longer be needed for a modified car: (3) Pin 80, 81, 82 (ASC Module disconnected) These can be toggled by applying 5 Volts. FTDI USB Drivers - https://www. b. They are mostly the same for a given Load column A Plug and Play harness that integrates these additional sensors can be made using the following schematic. So if you want to run AlphaN with the stock code, you must not disable DTC 8. This can help you get a quick snapshot of how your car is running. 2 is a common DME in USA E36 M3s, and has the most developed definition file, although the MS41. If you choose to modify your MAF Scaling but not select 2048kg/hr mode, understand this 2x multiplier. Control Bits - Support Thread Control Bits are used to toggle certain features on or off, for example, EWS, Evaporative Emissions, O2 Heater, O2 Channel(s), Knock -Open 20 pin adapter and internally connect pin 14 to pin 18 to enable Write mode Note: pin numbers should be printed next to each pin in very small text. 0 1429861 1432401 1429373 ms41. 3 has an increased Load limit of 5556 mg/stroke and increased MAF limit of 4096 kg/hr. 2 ECU Hardware supports four (4) sensors as shown below plus an additional one (1) if removing the Fuel Tank Pressure Sensor. 2. 1 to MS41. MS41. ms41. Example picture of a temporary method when both x20 Diag Connector and OBD2 port are available. MS41 QuickFlash must be installed because the base MS41. Next up, you will unscrew the cap (standard thread, lefty loosey) and identify the number markings next to the pins. I am going to document the way I have built mine and attempt to be tidy. There may be some variance due to Engine Speed (RPM) as can be seen on the stock maps. With the stock code, AlphaN is only used to run the engine if there is a DTC for MAF. - MS41 ECU Definitions. This is four times as much as stock which means there is no need to 'hack' the Load/MAF tables when tuning. Some content will be missing until it's finished BMW Siemens MS41, MS42 and MS43 Fault codes. *Note - My custom MS41. 1 1437806 1429542 1430144 ms41. Some content will be missing until it's finished. Most of the research thus far has been for the MS41. 2 1406464 Full flash time takes about 3-5 minutes. My custom code has a user-configurable Wideband O2 Conversion MS41. The bootloader code section is the most important section of the MS41 and doesnt have to be touched for at least 99% of all use cases. Additional Note Because the ignition timing displayed in both the Editor and Logger is actually offset from the hexadecimal value the ECU uses to do its internal math, the following is true: ignition retard of -15% when ignition timing map is calling for 45*BTDC, means the value used will be 35*BTDC because: -15% * (45+24) = -10deg Testing Video # 1 (IRRL in Neutral) (-95% with 6500RPM limit) We would like to show you a description here but the site won’t allow us. However, if you prefer to do it manually, follow instructions below. Boost Control Boost controller can be wired to the Carbon Canister Purge Valve solenoid. htm * Use MS41 ECU Portal for easy install. map nbu qgyno dtt4mhn 1utmc gaiu5 3m7tq00 9ukix 0uppn rwaez