Car came with Passat ECU 3B0 907 551 AN hardware.
Scanned as 8D0 907 551 M (what looks like a Nefmoto downloaded tune, aggressive stage 2).
I flashed a more conservative file (and EGR, SAI, EVAP, rear O2 deletes).
Car started, drove over several days.

Yesterday, car cranked but did NOT start. After lot of checking/trying (crank sensor, fuel, spark, etc) found:
16985 - Internal Control Module
            P0601 - 35-00 - Memory Check Sum Error


a) can hardware cause the check sum error or is that only tune related?
b) can the hardware be used for Me7.1 applications (2.7T, APB; 2000-2002 S4, A6, Allroad)?

did you bother trying ME7Sum on it?

If not, why not?

As stated, its a Passat 2.8 ECU. Came with the car, installed was a (assume Nefmoto download) agressive stage 2 file.
Car ran, no terribly noticeable runability issues. The tune scans as an S4 (8D0xxx551M" tune.

Only want to know if Check Sum error is tune or hardware related, and in the same context if Passat 2.8 V6 ECU should be used AT ALL for 2.7T.

You think the lack of N75 drivers isn't an issue (if, what he says is true)?

I'd think it would be immediately obvious from a log.

I've seen files flashed with MPPS that did not have a proper RSA signature... pull the file and please post the output.

You won't have any codes. But like nyet said.
It's very easy to see the problem in a log.



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