Requirements

• - Windows laptop (Tested with Windows 7 32-bit and 64-bit, Windows 8/8.1 64bit). Other versions may work, virtual machines may work, but are not well tested.
• - KKL lead or genuine RossTech lead. Leads that are known to work are listed here: http://nefariousmotorsports.com/forum/index.php?topic=325.0title=
• - Motronic 7.x ECU in car or with bench flashing kit. Bench flashing described here: http://nefariousmotorsports.com/forum/index.php?topic=417.0title= and here: http://nefariousmotorsports.com/forum/index.php?topic=6324.0title=

Setup NefMoto and Drivers

• - Download NefMoto from here: http://nefariousmotorsports.com/forum/index.php?topic=2200.0title=
• - If you are using a KKL lead, download D2xx drivers from here: http://www.ftdichip.com/Drivers/D2XX.htm
• - Install NefMoto.
• - Unzip the d2xx drivers to a temporary directory. With the Rosstech cable there is no need for extra drivers, but you must set it to dumb mode (Open VCDS --> Options --> uncheck ‘Boot in intelligent mode’ or check ‘Boot in dumb mode’ – depending on your version of VCDS).

• - Plug in your KKL lead (it is recommended to use the same usb port each time you plug it in - windows can attach different drivers to different usb ports, and the com port number may change if you plug into a different port).
• - Open device manager (Start -> Control Panel -> System-> Device Manage) and view 'Ports (COM & LTP). In this case Windows has identified it as a USB com port and installed a driver, but this needs updating to make sure it is the latest driver, so click 'Update Driver', 'Browse my computer for driver software', and select the directory you unzipped the d2xx drivers too. Once drivers are up to date, set your com port to com1 - this is not necessary for NefMoto but it makes it easier for other tools (Port Settings -> Advanced..).

Connect to the ECU
Plug the obd connector into the diagnostics port on your car or bench flashing lead, turn the ignition on, then open up NefMoto from the start menu. Nefmoto should detect the lead and show it in the box circled in green:



If Nef does not detect the lead then:

• - Click 'Refresh Devices'
• - Check the ignition is on/bench lead is powered up - if your KKL lead has a light then it should be on
• - Close and reopen NefMoto
• - If you are using a RossTech lead check it is in dumb mode. (Open VCDS, Options, tick 'Force Dumb Mode' or uncheck ‘boot in intelligent mode’
• - Unplug and replug in your lead
• - Check your device manager is not showing an issue for your device
• - Reboot

Once the cable is detected, select the baud rate as 38400 Baud, make sure 'Slow init' is selected, then click 'Connect Slow Innit'.



If you are lucky, then you have successfully connected to the ECU, and clicking 'Read ECU Info' will read some basic information from the ECU. If it has not connected on the first try, then try it again, but if it still does not work, you may need to do some troubleshooting:

• - Try lowering the Baud rate.
• - If you get the message 'Failed to read test echo from FTDI device', check that the lead is plugged into the diagnostic connector, check that the diagnostic connector fuse hasnt blown and check that the ignition is on
• - If you are trying to connect in the car, try unplugging the fuses for your instruments. There are usually two fuses for instruments, a permenant feed and an ignition switched feed, if you have full-dis there may be a fuse for the screen too.
• -  If you are having issues connecting to a ME7.5 ECU on the bench (such as 1.8T ECUs, check pin 121 on the ECU plug is powered, see: http://nefariousmotorsports.com/forum/index.php?topic=6324.0title=
• - If you are using a bench lead, try connecting in the car.
• - If you are still having issues, check that you can connect VCDS or a diagnostic scanner to the ecu and succesfully read fault codes, if not you may have an issue with your car or bench setup

What Next?
After reading flash off their ECU, most people want to remap their car – to increase power, remove emissions control systems, add extra functionality etc. Nefmoto and the forums will not do this for you – you will need to put in the effort to remap your car, if you are prepared to learn then people will help you. If you want it to be done for you, go pay a professional tuner.

If you are inexperienced and need to use your car, consider buying a used ECU and tuning that instead, so you can recover any read/write failures. You should also prepare for a bricked ecu by making sure you have a bootmode flashing tool, such as galletto or mpps.(http://www.nefariousmotorsports.com/wiki/index.php/ECU_Bench_Flashing)

To map your car, first read the S4 wiki to understand the basics, most of this information is relevant to other cars, such as the 1.8t: http://s4wiki.com/wiki/Tuning

You will need a map editor, such as winols (expensive) or tunerpro (free).

You will need an ECU definition file, often called an ‘XDF’, ‘kp’ or ‘Damos’, to identify the maps and parameters in your flash file. The definition file is like an index to the bin, it states the location of each map and how big it is. If you do not have a definition file for your ECU, try asking in the definition files request section: http://nefariousmotorsports.com/forum/index.php?board=34.0

If you cannot find a definition file for your ECU, consider using a different bin file which does have good definitions – many ecu’s can be cross flashed. This should not be attempted at random and you should stick to proven combinations until you are familiar with mapping, 512kb and 1024kb ECUs are not interchangeable. A good example of this is the ‘S4 M-box’ which can be used on many other 2.7T ECUs – more information is here http://s4wiki.com/wiki/Generations. If you are attempting this, look through threads talking about cross flashing, or ask for suggestions.

If you modify a flash file, you must correct the checksum prior to writing that flash to an ECU – otherwise a fault code will be triggered and the car may not run. Checksums can be corrected using winols, via the MTX plugin for tunerpro (www.mtx-electronics.com/prodotti/Software:tunerpro-checksum-plugins) or by asking nicely in the Checksum Update Requests forum: http://nefariousmotorsports.com/forum/index.php?board=35.0

FAQ
Q: What cars does Nefmoto flasher support ?
A: Nefmoto supports most ME7.1  and ME7.5 VAG group ECU`s . It is great for 1.8 20VT and 2.7 bi Turbo ME7 cars. More info: http://www.nefariousmotorsports.com/wiki/index.php/NefMoto_ECU_Flashing_Software

Q: Will my cable work with Nefmoto?
A: A: Most KKL cables and genuine RossTech cables will work with NefMoto. Read the “Setup Nefmoto” section of this guide for more info and links.

Q: Can I use nefmoto to immo delete an immobilized ECU?
A: A: No, nefmoto is used to read/write the flash, the immobilizer is stored in the eeprom

Q: Will nefmoto tune my car?
A: A: No...it is just a flashing software , nefmoto forums will help you a lot though

Q: Will you tell me exact steps to tune my ECU?
A: A: No. Go read the S4 wiki, read the forum, people will help you if you put in effort

Q: Will you tune my ECU for me?
A: A: No, go find a pro tuner, pay them

Q: Can I harm my ECU in any way?
A: A: Yes, if you are not careful. On most cars you can read the ECU without any issues, however on some cars reading will cause a fault code to be set which prevents the car from starting - if the car does not run after reading, re-flash the file you just read from the ECU. This is the case for '04-06 Allroads, and can occur on some others. Go to his forum section for useful info http://nefariousmotorsports.com/forum/index.php?board=16.0

Q: If I damage my ECU can nefmoto recover it ?
A: A: In case of a bricked ECU , then no..you will need to flash it in boot mode using Galletto or MPPS,check it here http://www.nefariousmotorsports.com/wiki/index.php/ECU_Bench_Flashing

Q: What is an ‘M-box’?
A: A: An Audi S4 8D0907551M ecu. Generally considered to be a good basis for S4 tuning as it has good definitions.

Q: I have a xxxxxxxxxxK K-box, can I flash on a M-box?
A: A: The ‘?-box’ shorthand only refers to S4 ECUs, and the ?-box is irrelevant if you are not talking about an S4 ECU. Cross flashing is only possible between compatible ECUs, and even ECUs that are the same part number with a different letter may be incompatible.

Links

• Latest Nefmoto software: http://www.nefariousmotorsports.com/wiki/index.php/NefMoto_ECU_Flashing_Software
• FTDI Drivers D2XX: http://www.ftdichip.com/Drivers/D2XX.htm
• Nefmoto Wiki: http://www.nefariousmotorsports.com/wiki/index.php/Main_Page
• S4 Tuning wiki: http://s4wiki.com/wiki/Tuning

To Add to the Settings for the VCDS cable.

Make sure you remove the boot intelligent mode in both your Main VCDS and Beta version if you are running any.

I followed the guide last night.
Personally, I got stuck as soon as I needed to select the if the ECU file is 512k or 1024k.
I googled as per suggestions given, with no answer provided I'm afraid. So that is where I stopped.

How do we go about finding out if our ECU's are in fact 512kb or 1024kb?
Is there a tell sign or info provided via VCDS that can confirm this for us?

My Box code is D, I did however find the answer on a M-box code.

Yeah !

The other listed ecu's are, most recent ecu's are, some older ones are 512kb.

38400 baud.

On 1.8t that usually means that pin121 is not powered up. You are doing this on the bench?