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EIS/EZS trouble, Please check dumps
01-01-2017, 09:55 AM
Post: #1
Mercedes Benz EIS/EZS trouble, Please check dumps
Hey People, I wish you all a happy new year!

New year, new problems Smile I have no experience with EIS/EZS so I am asking for help. It is W203 EZS with 2J74y and 4J74y. Last one I was able to read (eeprom+flash)

When I put the Key in the EZS I hear the sound of the ELV unlocking the steering wheel. But I can not turn the key. It is no mechanical problem, because when I supply the unlocking coil, I am able to turn the key. Nothing happens.

I have 2 keys working the same. I managed to read the 4j74y with my R270 and post dump here. Could someone please look at the dumps and verify they are ok. And maybe give me some advice what to do/check? Is there any possible bench test (without buying expensive hardware, I am working with Engine ECUs most of the time)

Thank you in Advance


Attached File(s)
W203 EZS.rar
File Type: .rar
Downloaded: 28 times
Size: 26.36 KB

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01-01-2017, 11:47 AM
Post: #2
RE: EIS/EZS trouble, Please check dumps
generate other keys, №4 ......... №7.
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 Thanks given by: Bibobabo
01-01-2017, 11:58 AM
Post: #3
RE: EIS/EZS trouble, Please check dumps
Thank you for reply, but I have no tools for key making. I just want someone with experience check the dumps and tell me if they look ok (and maybe) what could be wrong. Why does it unlock ELV/ESL but doesnt allow to turn key?

I searched a lot and found some dumps of W203 EIS. I compared Flash and found some differences in the beginning and the end. Especially FF istead of 00, which is very suspect.

On bench I measured current. Both original keys behave the same. When I try key from different car, it shows other behavior.
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01-03-2017, 03:13 PM
Post: #4
RE: EIS/EZS trouble, Please check dumps
ok, I will try to write flash with dump I found here on forum. Or is problem elsewhere?
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01-03-2017, 03:23 PM
Post: #5
RE: EIS/EZS trouble, Please check dumps
what is a pat no.?


New!!!Clone of med17.5.21,me17.5.24,med17.5.25,EDC17CP56,EDC17CP64 immo off/immo rebuild on VAG ecu's Modus/Clio/Megane steering column repair/virginising Merc EIS/EZS/ECU/Key generation ...and many more.
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 Thanks given by: Bibobabo
01-06-2017, 01:50 PM
Post: #6
RE: EIS/EZS trouble, Please check dumps
2035450108
I tried to simulate with Uniemu(codecard) and Julie emulator (esl2 mode) on bench to simulate working Esl. No key turn. Tried different flash files I found on forum. Tried on preheat plate @40 degree and 60 degree Celsius.
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01-07-2017, 04:42 PM
Post: #7
RE: EIS/EZS trouble, Please check dumps
problem is your flash...
use this one


Attached File(s)
4j74y flash.rar
File Type: .rar
Downloaded: 14 times
Size: 24.98 KB



New!!!Clone of med17.5.21,me17.5.24,med17.5.25,EDC17CP56,EDC17CP64 immo off/immo rebuild on VAG ecu's Modus/Clio/Megane steering column repair/virginising Merc EIS/EZS/ECU/Key generation ...and many more.
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 Thanks given by: Bibobabo , tarikdoudouh , narkeleptk
01-17-2017, 12:28 PM
Post: #8
RE: EIS/EZS trouble, Please check dumps
Keller, are you sure about that flash for my Eis? I ordered brand new 2j74y's (not china) and want to write a 100% working flash for 2035450108 . I think my eeprom is ok, only need good working flash. I have seen different ones starting with FFFF... some with 0000... ...what I read starts with 0000. maybe because of programmer, maybe it is right. Could someone confirm and maybe give me the right flash(es) for my eis
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01-17-2017, 11:57 PM (This post was last modified: 01-17-2017 11:57 PM by Keller.)
Post: #9
RE: EIS/EZS trouble, Please check dumps
Flash is good but you will need to modify it to fit your tool...If you won't me to hold your hand contact me by mail or pm


New!!!Clone of med17.5.21,me17.5.24,med17.5.25,EDC17CP56,EDC17CP64 immo off/immo rebuild on VAG ecu's Modus/Clio/Megane steering column repair/virginising Merc EIS/EZS/ECU/Key generation ...and many more.
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