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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > F07 Gran Turismo (2010 - Current)

F07 Gran Turismo (2010 - Current)
The 5 Series Gran Turismo -- now available in the USA as a 535i, 550i and 550i xDrive model.

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  #1  
Old 08-31-2013, 10:13 AM
reddie reddie is offline
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Location: Hong Kong
 
Join Date: Jul 2013
Posts: 8
Mein Auto: GT 535i
Control warning - Fog Lights Failure

I just changed the stock fog lights to LED fog lights. The lights comes on nicely. However, this change introduced a control warning notice from the onboard computer.

How do I reset or clear this warning message?

Thanks very much!
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  #2  
Old 08-31-2013, 03:35 PM
jadnashuanh jadnashuanh is offline
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Location: NH
 
Join Date: Jun 2011
Posts: 768
Mein Auto: 535ix-drive GT
The current flow required for the stock bulbs is likely higher than the LEDs and the computer is geared to assess if they're pulling that amount of current. So, the common thing is to increase the current feeding them or lie to the computer, possibly negating any savings, but fooling the computer that the bulbs are not malfunctioning. There are lots of discussions on this and the size and type of resistor required to make the monitoring system happy.

The alternative is to buy bulbs that already have this built-in, or are closer to the stock wattage.
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Old 08-31-2013, 07:44 PM
reddie reddie is offline
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Thanks mate. I guess I will have to do research on this. Thanks for your help.
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  #4  
Old 09-01-2013, 05:25 AM
FredM FredM is offline
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Location: Germany
 
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Mein Auto: F07 550ix
Quote:
Originally Posted by reddie View Post
I just changed the stock fog lights to LED fog lights. The lights comes on nicely. However, this change introduced a control warning notice from the onboard computer.

How do I reset or clear this warning message?

Thanks very much!
LED fog lights will trigger Cam Bus errors. Yep.
Some tests in German forums told the light is not that good as the original lamps but looks better.
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