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BMW X5 M will not start after mod flash ....please help.
24-03-2017, 09:41 AM, (This post was last modified: 24-03-2017, 10:21 AM by T-P-C.)
Post: #1
XZBMW  BMW X5 M will not start after mod flash ....please help.
7Hello

Please can someone help me?
I did flash yesterday BMW X5 M my2009 555hp gasoline
Over obd socket.
After all done it will not start .
Does anyone had the same and can help me what could be root cause?

I have to tell that even when i load the battery i had only 11.5 Volts during writing... sad
And before writing i did ecu id ....
I am not sure if one of this couks be root cause . The mod File is ok .

So i decide to reload the original
After thus car was able to start and drive.

I woukd be happy if anyone has a Professional idea please.
Thank you all .
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24-03-2017, 11:13 AM,
Post: #2
RE: BMW X5 M will not start after mod flash ....please help.
Read the errors first and list them
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24-03-2017, 11:41 AM,
Post: #3
RE: BMW X5 M will not start after mod flash ....please help.
(24-03-2017, 09:41 AM)T-P-C Wrote:  7Hello

Please can someone help me?
I did flash yesterday BMW X5 M my2009 555hp gasoline
Over obd socket.
After all done it will not start .
Does anyone had the same and can help me what could be root cause?

I have to tell that even when i load the battery i had only 11.5 Volts during writing... sad
And before writing i did ecu id ....
I am not sure if one of this couks be root cause . The mod File is ok .

So i decide to reload the original
After thus car was able to start and drive.

I woukd be happy if anyone has a Professional idea please.
Thank you all .

post original and mod file...
and more details about your ecu type

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24-03-2017, 11:56 AM,
Post: #4
RE: BMW X5 M will not start after mod flash ....please help.
What tool did you use, did you make correct checksumm?
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25-03-2017, 12:50 PM,
Post: #5
RE: BMW X5 M will not start after mod flash ....please help.
Write mod file without checksum. It's a MSD ecu and they all do this, just let tool to corect chk and car will start

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