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BMW Coding and Programming
Discuss coding options and features on your BMW here.

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  #1  
Old 01-24-2017, 10:38 AM
Serr Serr is offline
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Programing with another car as a Power Supply??

Can i flash a few modules in my car bridged to another car with engine running as a Power Supply?

Last edited by Serr; 01-24-2017 at 10:40 AM.
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  #2  
Old 01-24-2017, 11:51 AM
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Almaretto Almaretto is online now
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You can, but power will not be as regulated as with programming PSU.
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  #3  
Old 01-24-2017, 12:13 PM
Serr Serr is offline
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Thanks,
I'm thinking in flashing my DDE due to a bad tuning with high consumtion and lots of smoke that the preowner made (I just want the factory software ). And my transmission due to the 2-1 harsh. Should I do some preliminary tasks before updating?

Thank you for the reply's.

Last edited by Serr; 01-24-2017 at 12:28 PM.
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  #4  
Old 01-24-2017, 12:15 PM
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Be careful though. A wise Dragon once said this about using a proper power supply:

Quote:
Originally Posted by shawnsheridan View Post
Compared to a bricked ECU, it's cheap.
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Old 01-24-2017, 12:18 PM
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It's so easy to break them?
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  #6  
Old 01-24-2017, 12:23 PM
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Quote:
Originally Posted by Serr View Post
It's so easy to break them?
As Almaretto said, voltage fluctuations can be a problem, you might get away with flashing a module. Read more here (where Shawn's quote came from)
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Old 01-24-2017, 12:25 PM
Serr Serr is offline
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It has to be an alternative out there to reflash the module if first time went wrong.??
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  #8  
Old 01-24-2017, 12:37 PM
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Quote:
Originally Posted by Serr View Post
It has to be an alternative out there to reflash the module if first time went wrong.??
There is a difference between errors, preventing process for starting or completing, and bricking an ECU.

You do not need BMW Approved PSU, but you do need something more than just a trickle charger.

I use Schumacher INC-700A. That thread has some alternatives as well.

If you are mechanically-inclined, you can always build your own.
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Old 01-24-2017, 01:41 PM
Serr Serr is offline
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This PSU s are not that cheap. I'm going to try bridged from another car and try flashing something small to see how it goes. If it's fine for a few ecu's then I try my DDE.

Last edited by Serr; 01-24-2017 at 01:42 PM.
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  #10  
Old 01-24-2017, 02:26 PM
Serr Serr is offline
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Do you have a link where to build my own PSU?
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Old 01-24-2017, 02:30 PM
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Click on the line in the post above which says "build your own"
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Old 01-24-2017, 04:37 PM
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Thank you!
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