Problem uploading VEMS firmware

[AllarN]

1.1.27 is old, I used it 2 years ago. Now Im using 1.1.70 on my audi.

[Jamo]

what are you using to go back to 1.1.27? vemstune or megatune?

I used the A4kquattro method as downgrading via vemstune is not the best method I have found

if you need to go back to 1.1.27 follow the following procedure (the issue is that 1.1.44 floods the serial line with the AIM communication protocol, which prevents the firmware reset from working right):


1) edit the file 'upload-firmware12x12.bat' in the 1.1.27 megatune folder. Change the line that starts with: tools\megaloader.exe to read like so:

tools\megaloader.exe firmware\vems12x12.hex -wE -c com1

where "com1" is whatever your serial port is.

2) turn ecu off. Make sure no megatune or other programs are running that might try to use the serial port
3) shove a bent paper clip between pins two and three of the serial connector
3) power on ecu. wait 3 seconds. remove paper clip and connect serial cable to your computer.
4) run the upload-firmware12x12.bat file. It will ask you to press a key to continue etc. The process should complete successfully.

[Jonas_R]

Hi,

I was just trying out Vemstune and wanted to upload the 1.1.27 Audi Firmware with 12x12. However for some odd reason I can't do this, it says an error has occured and that it is in boot loader mode. Whatever the hell that means.

It can then detect the ecu but not connect to it because it is en boot loader mode.

Now I have tried the a reset method described on vems.co.uk/forum, and it worked one time. But then I tried to do update again and samething happend.

And now the reset does not seem to function.

So any good ideas?