NefMoto

car run fine,but yesterday it won´t start...

vcds write this: 16985/P0601/001537 - Internal Control Module: Memory Check Sum Error

error was not clear, I flash original file,and then error clear,but car won´t start...I have 1,8T with tuned file with LC and NLS..I flash eeprom too,but anyway car wont start...where is problem?

This is caused by a flag set in the eeprom due to previously bad flash checksum. Rewriting ori eeprom should fix it...

how do you mean? I have this engine into golf mk2,therefore I have immo off

It has nothing to do with immo. Either the flash is physically corrupt (or other part of ECU) - or you recently flashed a file with bad check sum.

But if you have written both original flash and original eeprom, then i would guess the ECU is bad. Post eeprom and I'll check if flag is set.

I flash orig eeprom,starter turn,but engine wont start

orig eeprom
http://www.uloz.to/x9vxXFs/orig-bin (http://www.uloz.to/x9vxXFs/orig-bin)

Flag is not set, so that part is ok anyway. I don't know what else can trigger this fault. Ross-tech suggests low battery voltage could be part of the problem but that sounds like a long shot...

Do you have a spare ME7? Program flash and eeprom into that one, read diagnostics and see if the same problem still occurs. If it doesn't i bet your ecu is toast.

I have two ecu...with the first ecu has the same problem a week agoI gave the second ecu and car run,but yesterday problem is repeated..I dont understand where the problem,two ecu are corrupted same

Wait a minute ??? The eeprom you posted must be read out from the ecu after it stopped working! Did you do that? Send me flash and eeprom readout (from non-working ecu) and I will correct checksum flag (if set) and flash checksum (if wrong). Attach it here or via pm if you wish.

now I read via bootmode eeprom95040 and flash 29F800

The fault flag is not set in eeprom, which is kind of strange because my checksumming program indicates that the main checksum and one multipoint checksum is wrong. Anyway, here is checksummed and corrected flash. Try it out and see what happens.

thank you,tomorrow I try it

car wont start...when I flash orig file,or for example I flash orig from S3 or another 1,8T car start...but when I copy maps from tuned file into orig,car wont start,checksum is ok,I flash in boot mode with galletto without any problems

The problem is that you don't know WHAT you are copy pasting.

+1. Define all necessary maps, understand them. Then you can copy them - or better - make your own tune :)

Had the same issue with a car. Car drove faultless for 2 weeks, but only on short journeys, then it was on a long run, stppied and failed on restart. P601. EEPROM reflashed and car was ok but checksum error still there if long run repeated. It seems that with tunerpro (assuming your using it) if you try and change too many maps at once then checksum this error occurs. Modify a single map, save and checksum and it'll be fine. Modify 5 or 6 in one go then save and checksum and it'll cause this issue.

If you're starting with an ori and then copying modified maps overs, do it singular, save and checksum one by one. Problem should get resolved

So the problem is the mtx checksum plugin?

what will http://nefariousmotorsports.com/forum/index.php?topic=447.msg3150#msg3150 tell you?

This case is very simple. Said user is copy pasting stuff without understanding what he is doing, and he is copy pasting a change in code area.
Which obviously makes the ECU crap itself, regardless of checksums.

Furthermore he is openly admitting that he is stealing this data from a tune he read off some other car and trying to copy it...

my car is tuned on dyno,half year was all ok,but now car wont start..company who tuned my car dont know where the problem

Simply as stated the file you have is probably corrupt, there is a checksum which only gets activated after a period of time, like I said you can drive the car for months then do say a long journey or something similar and it'll corrupt. Why this happens I don't know!

Only way to fix, is to flash the EEPROM with a virgin flash or the original, then reload a new flash file made from scratch and checksum'd through each map change. If you continue to use the same flash on say another Ecu the problem persists.

The current file I have had this issue it passes all checksums and the me7checker, I can recreate the problem by taking the car for a 30minute drive, it then fails. However, if I copy each changed map 1 by 1 check summing as I go its fine! Do them as a multiple batch it fails go figure.

I suggest you ditch the file and start again.

Totally agree.
Had same issue and fixed his way.