Hi, I'm hoping someone can help me because I'm a bit stuck.
I have an ecu (ME7.5 8E0909518AS) from an A4 that's previously (and unknown to the current owner) had a Revo trial. I say trial because its slow as hell apparently.

This ECU was brought to me by a friend who couldn't get into it with MPPS. I pulled the 29f800bb and 95040 off and read them in an eprom burner then rewrote both with standard files that I found online (not the best approach but I haven't got the originals!!!).
Soldered everything back, I can now get in with MPPS, VCDS etc. Car starts but cuts after 2 seconds in classic VAG immobiliser fashion and the dash displays safe.

Exactly what I was expecting.

So, I then immo off the 95040 (bytes 12 and 22 to 02, decrement 1E and 2E by 1). Same thing.

Looking at the 95040 data, it looks as though the 1st line is missing (file offset different for some reason?) so I tried editing bytes 02 and 12 to 02 and decrementing 0E and 1E by 1. Same thing again.

If I flash the Revo file and 95040 back then the car won't start, can't read with MPPS (but can ID). So it looks like the Revo 95040 data has been modified by something along the way.


I've attached the files (as zip files) I'm using along with the Revo files that previously, once upon a time, I'm assured did work (though I have never seen the car with my own eyes).

Is there a different immo off procedure for this particular flavour of ME7.5?
I've never had a problem swapping VW ME7.5 ECUs after immo off'ing them so I can't see why this would be any different.

Oh please, someone have some semblance of an idea...

Cheers
James


EDIT: 8E0909518AS - 95040 - Original.bin is missing at least the first line. It looks to be a partial read of the RAM via OBD. Don't use it!

Hi Marty, that's exactly what I tried and it resulted in a no start with safe on the dash.
This EEPROM dump is not easy to find. I could only find 1 by searching for an immo off solution and using the file the OP was asking for help with. I don't know if this dump is even correct. The structure looks different to that of any other ME7.5 95040 that i've seen.

immo off is the same. All vag me7 have the same layout. Dobt use any revo bits or it wont work. Use your new immo off file and a stock flash file. It will work just fine

bytes 12 and 22 from 01 to 02 (byte 12 was 1, byte 22 was 3 - should be the same), then decrement 1e and 2e by 1

I also tried this on pages 0 and 1 (which to me look like the immo pages, with skc on the pages directly below).

I've attached the 2 95040 files I tried the immo off in. Neither work

I found a 95040 dump from a 8E0909518 and I've edited it with the software number and version, cluster info, immo code, skc, vin and also immo offed it for good measure. I'll try it in the morning.
I think you're right, that dump I found must have been wrong.