Greetings from Russia!
I'm a newbie in chip-tuning, trying to mess with ME 7.1.1 from a cayenne turbo (Bosch hw number is 0261207696).
For now I'm trying to back up the contents of 800bb (main) ROM. The main problem I'm currently having is: it simply won't go in bootmode (or so my Galletto 1260 clone reports). I've tried all kinds of bench harnesses:
http://wiki.obdtuning.com/images/0/03/VAG_ME_7_Skizze1.jpg - this one with "ignition switch" on pins 62/21, as some have suggested.
or the same one, but with switch on pin3 as others have said that's the proper way instead.
I tried a bigger resistor for the boot pin probe: 10K, tried a different ground point for the boot probe (alligator clamp on the ecu board, instead of the PSU ground).
Tried holding pin24 grounded for longer time (up to 10-15 seconds).
I even tried desoldering the bridge on the back of PCB:
http://wiki.obdtuning.com/images/7/7f/VAG_ME_711_platine3.jpgNothing led to success, unfortunately.
So, trying to determine whether my Galletto is faulty: for how long should ME 7.1.1 stay in boot mode after it's triggered?
If I try checking the ECU with MPPS v12 clone, I can't connect to it for ~10-15 secs after I start the ECU up with pin 24 grounded. Does this mean that it actually goes in boot mode and then defaults to "normal operation"?
I also tried different PC, tried clean VM with WinXP, so I'm fairly sure it's not the software issue.
Also, I actually have a chip programmer for the 800bb, so the last resort would be to solder out the ROM and then solder it back, - but that's really a last resort.
Please help?
EDIT: Oh, I also tried reading ROM contents with the MPPS, but it somehow reads only 402 kilobytes out of 1Mb (I believe?) ROM, which is why I'm trying to do it in boot mode.
EDIT2: Just tried the following version of Galletto software:
http://nefariousmotorsports.com/forum/index.php?topic=3088.0 with two different cables, still a no-go, - so the problem seems to be in the ECU itself.
Anything else I can try?
EDIT3 (final?): So, apparently it's the problem with Galletto: MPPS v12 worked in boot mode. Setup that worked for me:
http://wiki.obdtuning.com/images/0/03/VAG_ME_7_Skizze1.jpg with "ignition switch" wired before pins 62/21. Also, resistor on the board's back is desoldered (should I put it in after I'm done?) - but I believe it could have worked prior to its removal.
The reason I can't get the whole 1Mb readout is because of the "noread" flag present in the firmware: MPPS software honors it, but there are ways to defeat it.
TL;DR version: Galletto is shit and doesn't work (maybe that's just me, though).