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Author Topic: Reprograming ECU without checksum  (Read 9160 times)
Gulfstream
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« on: June 29, 2015, 09:55:43 PM »

Hi peolpe!

i write the ecu file without checksum file in mmps.
after the reprogramation, i make a test and the engine starts. but in the second start, the engine dont works!
when i try to read the ecu in mpps appears "ecu not found"

the car is a passat v6 2004 BBG.

what i can be make now to solve this problem?

thanks!
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nyet
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« Reply #1 on: June 29, 2015, 09:56:36 PM »

How about checksumming the file before writing it?
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ME7.1 tuning guide
ECUx Plot
ME7Sum checksum
Trim heatmap tool

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ddillenger
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« Reply #2 on: June 29, 2015, 10:22:53 PM »

Unplug the ecu for 5 minutes.

Plug it back in.

Do not attempt to start the car, or turn the key off.

Flash a file with good checksums.

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Beaviz
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« Reply #3 on: June 29, 2015, 11:54:26 PM »

Wouldn't MPPS correct checksums? According to AMT Cartech it should: "It offers like most other tools reading / writing operations and checksum support..."
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turboat
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« Reply #4 on: June 30, 2015, 12:31:39 AM »

How has that worked out so far? Is it genuine mpps?
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Gulfstream
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« Reply #5 on: June 30, 2015, 12:39:00 AM »

Unplug the ecu for 5 minutes.

Plug it back in.

Do not attempt to start the car, or turn the key off.

Flash a file with good checksums.



I will try to make it!

I correct the checksum with the me7sum.exe and check with me7check.exe and found no erros!
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Gulfstream
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« Reply #6 on: June 30, 2015, 12:41:11 AM »

Wouldn't MPPS correct checksums? According to AMT Cartech it should: "It offers like most other tools reading / writing operations and checksum support..."

In MPPS have the bottom for id ecu, read, write and checksum... i dont know whats the file i have to select when i click in checksum!
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Gulfstream
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« Reply #7 on: June 30, 2015, 12:48:47 AM »

How has that worked out so far? Is it genuine mpps?

Not genuine!

Its a cracked version.

I read the original file and save on my HD

I edit on file the KRKTE because i install new injectors and save the new file without correct the checksum.

In MPPS, i click in WRITE and select this new file, when the work its complete, the problem inform to switchoff the key.

after it, i disconect the MPPS (EOBD2) and switchON and start the engine fine! switchoff.... when i try to start again the engine not work, the fuel pump not work... all not work!

and now... when i try to write i new file with the corrected checksum the MPPS dont found the ECU!

But i will try to make it, that the ddillenger say!
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spacey3
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« Reply #8 on: June 30, 2015, 01:20:16 AM »

I think MPPS compares the file/checksums to another.

So... Click Checksum -> Select file you want to checksum -> Select/open ori file -> Save checksummed file -> Write checksummed file

Then you can write.
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jiggle
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« Reply #9 on: June 30, 2015, 01:33:40 AM »

mpps has been perfect at checksumming for me

I bricked my ecu after a couple goes with mpps. it can fix them pretty easily, dont worry
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tjwasiak
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« Reply #10 on: June 30, 2015, 06:41:40 AM »

I would check if it is not related to RSA checksum issue described already on Nefmoto forums...
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Gulfstream
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« Reply #11 on: June 30, 2015, 10:14:44 AM »

Unplug the ecu for 5 minutes.

Plug it back in.

Do not attempt to start the car, or turn the key off.

Flash a file with good checksums.



I make it

unplug ecu for 5 minuts and plug back, i dont start the engine, the key is off.

but the problem still "ECU not found"

Sad
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Gulfstream
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« Reply #12 on: June 30, 2015, 11:02:02 AM »

The problema was solved!

I try again and make equal that the ddillenger say and MPPS writh the new file with the corrected checksum!

Thanks for helping!! ALL!
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overspeed
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« Reply #13 on: June 30, 2015, 11:02:53 AM »

just boot it and will be fine
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Gulfstream
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« Reply #14 on: July 01, 2015, 09:52:24 AM »

KRKTE is a 8 bits?

I install 320cc (FBY2850 18 holes) in V6 30v, how i can decrease in KRKTE?

I read a post here in Nefmoto, Tony say that not good decrease too much in KRKTE, how is this too much?

Smiley
« Last Edit: July 01, 2015, 11:00:15 AM by Gulfstream » Logged
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