I have been poking around the forum for about a month now and have learned and played around with a few things. I successfully connected to the ECU a few times with Nefmoto and even read the BIN off of the ecu successfully. The BIN file must be a tuned file as the logs I pulled showed desired and actual Boost of ~14 PSI.

Today, I connected to the ECU like normal and read the ecu info. I then thought about flashing another BIN to my ecu but decided to wait and read more on it before taking the plunge. Curiosity did get the best of me however and I did choose a few flash files, including the one I read from my ECU, and checked to see if the flashes matched. Of course the one I read off of my ECU did and the other two didn't. I then disconnected from the ECU, now looking back I'm not sure if I clicked disconnect in the Nefmoto app or if I pulled the cable out of the OBD port or what. I then went to start the car and now it won't start. The car just cranks and cranks and cranks. I attempted to reconnect to the ECU again with Nefmoto and VCDS with no success. The VCDS test showed that it recognized the interface when tested however.

So, I guess my options now are to get a Galletto and get the car into boot mode. However, I figured I'd come here first. I'm puzzled as to what went wrong since I didn't attempt to write something to the ECU.

What are my options?

-Galletto Cable into boot mode?
-Simply disconnect battery for 10 minutes?

If I need to get the ECU into boot mode, which pin do I ground on a 2003 A6 2.7T 6SPD?

Thanks for any and all help.

which file did you flash btw? 2003 a6 2.7t is going to have the 5p08c3 eeprom. if you flashed say a file from an s4 then for sure its not going to work.

Ok, I got my ECU out of the car and taken apart. I'm going to build a bench with a PC power supply and bench flash this. I've heard people have had issues with boot mode on these. BTW, I've heard of people using dremels to cut their bolts and heating them up etc... to get them out. I used vice grips and was able to get the screws out quite easily.

I've got a galletto on the way, so wish me luck. I was frustrated and upset but now I'm pretty stoked to start doing this.



This is the correct boot pin(it's the second pin from the end), right? I'm going to solder a wire to that pin and then leave it there with some heat shrink over the exposed end. Thoughts on this?

I'm thinking about how sensitive electronics can be from ESD. Maybe it's my better safe than sorry or apprehensive thought that something could go awry if I accidentally grounded pin 23 and 24 or 24 and 25 at the same time while attempting boot mode.

I guess I'm also just looking ahead to being able to do galletto flash from the car in the future. Keep a small 2" wire soldered to that pin and heatshrink and/or tape the exposed end when not being used. There may not be much advantage to this but it's just a thought.

I'm still not able to access cluster or ECU while ECU is installed in the car. This is with a dumb cable or Galletto and Nefmoto/VCDS.

Ok, I finished my workbench setup(as seen below). Holy crap is it hard to get all of these alligator clips in that tiny area and have them shielded too. Maybe I don't have small enough alligator clips but, damn. I think I'm going to use an IDE connector like I saw someone use on here. Voltage is at 12.13V measured from source to perimeter of ECU board.

Diagram:



EDIT2: DO NOT use the 2.2k Ohm resistor as shown. I finally got my first successful boot mode connections/reads without this and using a 10 second grounding of boot pin.

Picture:




EDIT: I tried to get the EOBD1260 program to Read the ECU Info but it seems to just hang up. I tried to connect to the ECU in Boot Mode with Nefmoto but got the following from the Log:


This is the error I got once with ArgDub's Eeprom reader. Keep in mind this is a 5P08C3(8kb) Eeprom on a 4Z7907551R ME7.1.1 ECU. The rest of the time I got FAIL, No response from ECU 0x07(not in boot mode):



At least I haven't let any magic black smoke out of it yet.

It appears I may have got it into boot mode once. When I connected the Galletto in my car the LED lit up. However, on the bench it doesn't. If I connect my dumb blue cable the LED lights up, with the same workbench setup(including the female dongle). If I connect the alligator clips directly to the male Galletto cable the LED lights up...Not sure why that is. The light flashes from red to orange like there is activity but I can't seem to get anything to successfully talk to the ECU.

Just a heads up, I had exactly what your setup is and always had problems. I have since sourced out a doner ecu pigtail from a junked ME7 vehicle and am much happier. No more guessing if this or that has good contact. Just my cents thrown in...

Don't over think this.
You don't need an ignition switch.

Also, I don't know if ME7.1.1 is special somehow, but at least for ME7.1 I never use any kind of resistor on pin 24 of the flash chip.
Do not put any resistor there, just short it directly to ground.

So, the steps are:
1. Short pin 24 to ground.
2. Power up the ECU (plug in your power source), this includes everything. Ignition, power, etc.
3. Your ECU is in boot mode.
4. Remove the connection of Pin 24 to ground.
5. Write the ECU in galletto with boot mode.

pm me your an original eeprom read (either old or replacement ecu) and ill send you immo off file.