NefMoto > Technical > Flashing and Chipping > Can't Write 551K Box
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Author Topic: Can't Write 551K Box  (Read 5591 times)
Michel94
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« on: July 06, 2012, 03:51:52 PM »
Hi, i bought a Me7.1 8D0907551K ecu, the file is stock i can read it without problem , but impossible to write... i try with some interface and in boot mode it doesn't work.
I saw that the eprom was desoldering, the seller says that a chiptuner has chip the box, and after he put the stock file an lock the box to sell the car..

How can i do? thx
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prj
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« Reply #1 on: July 06, 2012, 08:00:36 PM »
Boot mode on the bench must work. In car forget it.
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RS4boost
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« Reply #2 on: July 07, 2012, 01:46:08 AM »
Hi,

you say in the past the flash was desoldered.
So have a look to this, to ident it is the original AMD flash device.
It must be a AM29F800BB.

Some tuner desolder the original flash and change it to a similar Intel or a AMD x800BT one.
So you can't flash it over OBD or in boot mode, because the internal flash procedure for this different devices wasn't the same.

In the last years I have seen a few of this.
« Last Edit: July 07, 2012, 01:49:11 AM by RS4boost » Logged
Michel94
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« Reply #3 on: July 07, 2012, 01:58:18 AM »
Thx for the Answer, RS4boost the eprom is the same as original, 24F800BB..
PRJ i work only with boot mode on the bench. I try with MMPS obd (usually it works fine), MMPS in boot mode , it's starting and at 3% failed, VagMe flasher i juste can Read, can't click on ''PROG", Nefmoto flasher doesn't work for me in kwp2000 mode its failed because of immobilizer and in boot mode its shutdown when i try to connect.
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prj
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« Reply #4 on: July 09, 2012, 03:26:20 AM »
Desolder chip, reflash 29F800BB, then try flashing again...
Although boot mode should just work if you are doing everything right, because it does not matter what is on the chip.

Maybe try changing chip.
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Michel94
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« Reply #5 on: July 09, 2012, 04:14:34 AM »
I don't understand why it doesn't work, i make new test:

Read 9040 OBD is OK , Write 9040 in boot mode is OK
Read 29F800BB OBD is ok , Read 29F800BB in boot mode is OK, Write doesn't work OBD or BootMode

Prj i can't desolder chip, i'dont have what to do this. Maybe i will contact someone to do it for me.
Thx
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prj
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« Reply #6 on: July 09, 2012, 06:51:09 AM »
Uhm ok...

Yea good idea to have that equipment if you are playing with ECU's.

Try to change chip...
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