MED 9.1 retrieving SKC for key programming from ECU dump

**soatergttl** · 16th February, 2020, 11:41 PM

Hi all,

First post, but been reading so many posts from here over a year or so. I love tinkering with cars and am a software developer by trade (although not embedded for my day to day).

I purchased a Golf V GTI (2005) and the key has been stolen (only 1). I have replaced the barrel from another car and have it all working except the immo. I have purchased some new transponders and some tools bdm100 / vagtacho. The VagTacho I have shows wrong seed key when trying to connect to the dash. The dash is the top of the line and so different from my other GTI's. Has the full red screen.

I am able to get the full ECU dump flash/eeprom. Is there a way to retrieve the SKC/Pin required by VCDS to program the transponder with the key?

It seems most people go for immo off, but the ECU / DASH are the original, only the key needs programming.

Thanks.

**morgano** · 17th February, 2020, 09:14 AM

Upload here ecu flash and eeprom.

**Dobermann** · 19th February, 2020, 02:29 AM

post the full ecu dump flash and eeprom from med9.1 like morgano said !

than we can help you with the SKC/Pin

**geeroam** · 19th February, 2020, 09:11 PM

Med 9.1 can be done EEprom only, That could be a micronas cluster log in data wont help you much vcds if micronas you need to make a dealer key you can PM me ill help you, I would caution you going for immo off if alarm goes active and you dont have a remote coded or coded transponder you can have problems

**soatergttl** · 22nd February, 2020, 01:44 AM

Hi guys,

Thanks for the responses. One of my children has been sick for a week, so sorry about the delay.

File is here http://www.macroworx.com/BlueECU.zip

From what I can see when I swapping barrel the cluster has a VDO sticker on the bottom of it. So I am guessing not micronas?

Still trying to get my head around all these cluster combinations.

**morgano** · 22nd February, 2020, 02:05 AM

Originally Posted by soatergttl

Hi guys,

Thanks for the responses. One of my children has been sick for a week, so sorry about the delay.

File is here http://www.macroworx.com/BlueECU.zip

From what I can see when I swapping barrel the cluster has a VDO sticker on the bottom of it. So I am guessing not micronas?

Still trying to get my head around all these cluster combinations.

Here is your ecu data.

**soatergttl** · 22nd February, 2020, 02:38 AM

So from all my research this security key won't help me? I need the 4 digit code from VDO dash to reprogram the new transponder? This code is used in an ECU swap or Dash swap only.

**morgano** · 22nd February, 2020, 02:44 AM

Ecu and dash should share unique car pin code.

**exe123** · 22nd February, 2020, 10:56 AM

Originally Posted by soatergttl

I need the 4 digit code from VDO dash to reprogram the new transponder?

There was never a 4 digit code. All codes are 5 digits. Older ones (Immo 3)have leading 0 and 4 digit. Later ones (Immo4) use all 5 digits. Up to 06/2006 you can use empty megamos and learn to dash. If dash is manufactured after 06/2006 you need to precode the megamos with 7byte CS

**soatergttl** · 23rd February, 2020, 12:15 AM

Thanks for the information guys. Sorry, I know they were 5 digit, by 4 I meant the ones that start with 0. Didn't know that was just for immo3. Ok so just googled the CS very cool to know. So a transponder programmer would be required to precode that. Good to know. Might actually look at getting the small vvdi for that.

**soatergttl** · 26th February, 2020, 10:17 AM

I got my transponders today.

All seems good with those.

Following the VCDS instructions to recode key in the security I enter 35797 and get a error 35, key rejected by controller.

**exe123** · 26th February, 2020, 10:35 AM

Your MED9 is crypto already.

Here is the correct data:

CS: 93404872EFA1C8
MAC: 689E0299
Login: 01557

**soatergttl** · 26th February, 2020, 12:55 PM

Thank you so much worked perfectly. One transponder all coded. So next learning question as I probably won't do it. But this car had an AXX engine and I have swapped for a BWA, I know from research that the ECU will run it but obviously different tunes as the AXX is a different compression ratio. I have a spare BWA ECU can I put this ecu in the car and copy over the immo data and eeprom (from the AXX ecu) and it all should work? Also the coding obviously but I think they are the same anyway.