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littco
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« on: August 10, 2011, 06:34:19 AM »
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Any ideas? Me7.5. Ecu bricked after a bad flash with nefmoto. I have tried galletto with bootmode but it just won't connect. Using a 2.2k on pin 21 and a 5k resistor on boot pin connected to ground. Galletto just says it's unable to connect. Happy to remove the 29f800 chip but just wondered if I had missed something.
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pvl
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« Reply #1 on: August 10, 2011, 08:36:06 AM »
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if you have a benchflash-harness, try to do a vagcom-diagnose. If it responds, you can flash the unit. Ifnot, rewrite firstly the eeprom with a virgin dump (95040) and then try again with galletto. you only have to keep the bootpin on the flashrom connected for 2 seconds max to enter bootmore, and then release the temp ground, and galletto will flash it correctly. Most people leave it in boot-mode-triggering-modus, and then galletto cannot connect... Hope this helped you out  Cheers, PvL |
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pvl
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« Reply #2 on: August 10, 2011, 09:30:00 AM »
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Red circles are the pads to use.
Green V = 1-2 sec connection with a v-shaped staple
Green line = alternative 1-2 sec connection with a wire.
The connection must be made just before the ecu is powered
up. Keep it bridged, and power the ecu up, while counting to 2.
Then undo the temp-bridge and the ecu is in bootmode. No
additional resistors needed. Done a few with galletto 1260 this way
and all are still in perfect shape.
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littco
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« Reply #3 on: August 10, 2011, 09:44:58 AM »
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Thanks PVL. Are you saying no 5.5k resistor needed on the bootmode pin? Ie a wire direct ground to bootpin?
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kenmac
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« Reply #4 on: August 10, 2011, 12:23:10 PM »
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For the record, I spent a lot of my time pulling my hair out getting my ME7.5 into boot mode. I was testing this by performing a Galletto read each time after I attempted boot mode. I finally just tried to write the intended flash instead of performing a read as a test, and the write succeeded without a hitch. I still have never gotten a "read" from Galletto. But I really only need it to "write" to a bricked ECU anyway.
My boot-mode method was 5 seconds on the boot pin to the ground of my power supply. Although I'm inclined to try the method described above next time.
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« Last Edit: August 10, 2011, 12:31:02 PM by kenmac »
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nyet
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« Reply #5 on: August 10, 2011, 12:53:56 PM »
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Thanks PVL. Are you saying no 5.5k resistor needed on the bootmode pin? Ie a wire direct ground to bootpin?
Yes. Only while ECU is being powered up. Then remove it. |
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pvl
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« Reply #6 on: August 10, 2011, 02:38:55 PM »
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" Are you saying no 5.5k resistor needed on the bootmode pin '' -> spot on. No resistors
needed.
I never used them on these 1.8T ecu's. And it always gave me good results on a
P4-WinXP-SP3 machine with galletto 1260 clone, plus the correctly chosen bootmode (400/800 flashrom). Works like a charm.
It's just 1-2 seconds that the bridgewire needs to be applied. No more. Only dureing
power-up of the ecu (ignition-on).
Cheers,
PvL
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littco
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« Reply #7 on: August 11, 2011, 04:00:52 AM »
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Success....
So after to much time trying with 5.5k resistors I finally managed to get my ECU into Bootmode and load on the file.
Just for reference I found that using the single wire from the metal ground around the ecu to pin24 worked. Using the V pin across the 2 pads didn't.
So a big thank you too all, who offered advice etc.. Another ECU saved from being bricked!!!
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pvl
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« Reply #8 on: August 11, 2011, 04:11:38 AM »
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Thanks for the feedback.
Glad to hear it worked out well for you.
Cheers,
PvL
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judeisnotobscure
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« Reply #9 on: August 11, 2011, 05:58:42 AM »
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I've been having the same issues with a couple me7.5 ecu's on the bench... I have yet to get boot mode with one... This gives me hope though. I'll fiddle around a little more with it to see if i'm just being dumb.
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I have a b5 s4
but i just want to dance.
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littco
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« Reply #10 on: August 11, 2011, 06:19:26 AM »
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I did also have a 2.2k resistor on pin 21 as well. Not sure if this made a difference or not but it worked with it ok.
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chienliu1972
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« Reply #11 on: October 12, 2011, 07:19:38 AM »
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Most people leave it in boot-mode-triggering-modus, and then galletto cannot connect... Hope this helped you out Cheers, PvL Could Pvl kindly advise how to know that ECU now is in boot-mode-triggering-modus? More in detail with description? I always get "boot mode inactive". |
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pvl
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« Reply #12 on: October 12, 2011, 03:54:11 PM »
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It's time for you to contact me on msn.
You have been given already enough tips via this forum.
You have other issues, with the hardware. I will not discuss
further, over here.
Time to meet-up.
Speak to you soon.
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chienliu1972
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« Reply #13 on: October 19, 2011, 12:40:36 AM »
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The ECU has been into bootmode successfully. The problem is my problem cable of Galletto 1260. When I used a new Galletto 1260 cable, it worked smoothly.
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