mattytdi
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« on: September 02, 2017, 05:25:12 PM »
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Good day all. I have been using 518 ak software in my 05 a4 MT Q. Went to flash recently, messed up my connection, and bricked the ECU. Through multiple failed attempts to get bootmode, I gave up and picked up another ECU. Can't seem to get that one in to boot mode either, to flash immo bin. So.. I'm hoping to use vcds method to satisfy immo on the al.
But, don't have a pin for either.
Any suggestions?
I'll attach original bin.
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fknbrkn
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mk4 1.8T AUM
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« Reply #1 on: September 02, 2017, 07:02:20 PM »
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pin stored in the eeprom
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mattytdi
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« Reply #2 on: September 02, 2017, 07:14:04 PM »
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ok... I'm unable to access either computer though obd...
The original computer, (one I recently locked up) when attempting to activate bootmode, doesn't respond. Also, ABS light luminates, when batt is connected, along with the yield circle and the other normal one, beside it. Can't recall which one that is atm.
The new ecu, seems to get in to boot mode, or programmable mode, but immo won't allow data access, read or write...
Any suggestions on accessing the eeprom.. or any ideas that may move things forward...?
Thank you very much for your response btw!
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mattytdi
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« Reply #3 on: September 02, 2017, 07:48:36 PM »
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Another detail, it seems the new ECU my be entering boot mode, but when I load the 515kb immo file to nefmoto read/write application.
The "choose flash file" window turns yellow... not sure why.
As a result, can't flash the immo bin to the ecu...
Any idea how to make application accept the 512k immo bin?
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fknbrkn
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« Reply #4 on: September 05, 2017, 08:23:48 AM »
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eeprom is 512b not 512k
and not flashable by nefmoto software
read forum before do something weird
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mattytdi
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« Reply #5 on: September 05, 2017, 11:21:07 AM »
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Correct. Original ecu is 518bc. I installed 518ak software due to the availability of 518ak xdf's.
I have decided to try to aquire the fob matching the ecu..
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KasperH
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« Reply #6 on: September 05, 2017, 02:30:41 PM »
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Correct. Original ecu is 518bc. I installed 518ak software due to the availability of 518ak xdf's.
I have decided to try to aquire the fob matching the ecu..
He means the eeprom size is 512 BYTES not 512 KILOBYTES  |
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316LV
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« Reply #7 on: September 05, 2017, 04:04:45 PM »
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To get into bootmode I find these 518xx ECUs like a bit more time grounding pin 24. Seven seconds works every time for me, whereas my Jetta ECU was anywhere from 3-5 seconds. Try giving it a couple seconds longer and see if that works.
Are you doing this in car? I have never had luck pulling the e2p through the OBD port (although that just could be my Audi). I had to do it on the bench to make it work...
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Go ahead and give me negative karma... I don't care if you like what I post princess.
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mattytdi
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« Reply #8 on: September 05, 2017, 05:29:57 PM »
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I have been trying in car, I had read somewhere that ten seconds was sometimes needed. Hadn't tried seven.
I'm away from the car for a while now.
I'll try seven seconds as soon as I get back to the car.
Do you recall, was your abs light on while attempting to activate bootmode?
Thank you all for your input once again!
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316LV
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« Reply #9 on: September 05, 2017, 08:13:59 PM »
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...Do you recall, was your abs light on while attempting to activate bootmode?... Sorry I never tried in car. I couldn't even read the eeprom in car. I pulled the ECU and hooked it up to my bench rig. I needed to write the copied eeprom to my Ebay ECU so I had my bench rig ready to go anyhow. It was far simpler doing it that way. I wouldn't consider doing it in car TBH. I've got long arms but switching the ignition on while grounding the boot pin doesn't sound like fun at all. |
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Go ahead and give me negative karma... I don't care if you like what I post princess.
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mattytdi
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« Reply #10 on: September 05, 2017, 08:22:17 PM »
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Lol, I leave tglhe key in "on" position, then ground 2nd terminal on chip while connecting ground terminal at battery.
I had a look at the bench flashing harness. That does seem like a better way to go.
The K-line is the data transfer line I'm assuming..?
If so... which usb pin out would be the correct one to wire to k-line..?
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316LV
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« Reply #11 on: September 06, 2017, 04:06:38 PM »
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K-line is pin 7 on the OBD connector. See this post by Matt Danger if you want a picture: http://nefariousmotorsports.com/forum/index.php?topic=417.msg2805#msg2805You can make bootmode easy by using a seizer probe, momentary switch and alligator clip. Wire the seizer to the clip through the switch. Hook the seizer probe on pin 24 and clip the other end to the edge of the pcb. Hold momentary switch on, apply power via the bench rig, count off the seconds you want, then release switch and voila; bootmode. It how I roll at least. Never fails for me. First attempt every time... |
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Go ahead and give me negative karma... I don't care if you like what I post princess.
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mattytdi
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« Reply #12 on: September 06, 2017, 05:16:30 PM »
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Yeah, I probably should construct a little assembly like you have described... Honestly I've never had a problem getting boot mode either, until this most recent failed attempt. Other times (maybe 4x) have activated boot mode seamlessly...
From memory, does it seem normal that abs waning light in cluster is lit when car is powered up..?
I do recall rad fans kick in when power is applied, but ecu is bricked. Which my car is doing. But I feel like the abs light is not normally lit in this circumstance.
I'll try a few more boot attempts, going to check continuity across resistors on the ecu board, assemble a bench harness. If none of these methods will get me in to boot mode. Then I'll have to assume this ecu is shot...
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mattytdi
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« Reply #13 on: October 05, 2017, 09:48:00 AM »
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Good day all.
Thank you each for your input. I have been doing further research and learning regarding eeprom changes and adaptions, starting to get a better understanding.
I made a mistake building my bench harness, and wrecked 2 ecu's as a result. The mistake was... I grounded pin 24 on the Harness pin-out. Not sure what pin number 24 on the harness controls, but ground it and your ecu will never be the same...lol.
Picked up another ecu, and nearly ready to turn off immo. ECU is same as my original, 8e0 909 518 bc.
Having wrecked 2 ecu's lately, I'm feeling pretty cautious.
My question is, once you have completed the bootmode/immo off process. (i plan to use turboat's tool) do you simply turn off the power supply, or command a disconnect first?
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fknbrkn
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« Reply #14 on: October 05, 2017, 11:25:11 AM »
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just turn it off after reading/writing operation complete
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