Fuel pump controller failed. Confused by replacement part numbers!!

flo3flo

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nKH32b

This is the top, which looks normal.
<a href="https://ibb.co/nKH32b"><img src="https://preview.ibb.co/b0GKaw/23432544_10156077920937638_903175668_o.jpg" alt="23432544_10156077920937638_903175668_o" border="0"></a>
 
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The resin has crumbled away and the PCB is badly corroded. There was some water in the bottom of the bowl too.
 
Fuel pump tested fine using a bypass wire.
Ive checked on the BMW parts catalogue but 774 doesnt seem to feature, however 1614 7 720 776 does!
It also says 776 has been superceded by 1614 8 523 262.

Theres one for sale on ebay - 1614 8 526 432. Will this work on my 2008 R1200GS?
Are they really that different between part numbers.
 
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There is a sticker on my failed unit that shows '07/09'.
My bike is a March 2008 model. I know there have been recalls on this part. I can only assume this FPC was manufactured July 2009, unless the numbers are not a date.
 
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After some research, the sticker cant be a date. I found an image on the internet showing '36/14'
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720 776 is the job so the 523 262 one will fit also, if the list says so.
Don't know about the 432 one on eBay.
 
Back in July, my "black" FPC failed on my 2009 GS in the middle of a forest about 100Km south of Östersund in central Sweden, on our way back from Northern Norway. It turns out that most Swedish Motorrad mechanics take most of July as holiday, as does the Swedish breakdown service who eventually recovered us to a Honda dealer ffs!! We had to fly home and three weeks later (when the bike was repatriated) I changed the controller which was dry, unmarked but deffo fubar. The GS911 only indicated a fuel pump fault so I guess it can't see the controller. I now carry a bypass lead.
 
Makes yourself a bypass lead using the connector from your old pump controller. You will also need to carry a suitable Torx screw driver as the "allen key" type struggle to get at the screws.
 
Bmw had serious problems with these abortions

And they decided on "Development by customer"
This entailed replacement models having a different part number from the originals.
A succession of different part numbers for the same component arrived, each, - probably from a different supplier or with some modification or other.
Eventually, having near enough destroyed BMWs reliability reputation, they found an acceptably reliable model and they painted them black to indicate that this was the one to have.
Your's bucks the trend.
Basically, though, they are all interchangeable.
Myke
 
And they decided on "Development by customer"
This entailed replacement models having a different part number from the originals.
A succession of different part numbers for the same component arrived, each, - probably from a different supplier or with some modification or other.
Eventually, having near enough destroyed BMWs reliability reputation, they found an acceptably reliable model and they painted them black to indicate that this was the one to have.
Your's bucks the trend.
Basically, though, they are all interchangeable.
Myke

Such a cynic. ;)

But BMW also sell only complete replacement master cylinders. You can't get seal kits at any price. Same with heated grips. When the rubbers wear out or elements fail you have to replace the lot including throttle cable winder. Not fleecing the customer. Of course not.
 
True, true. The interesting thing is that my "failed" black FPC was fitted with the new red, ridged sealing ring, not the original green round beastie. It had been incorrectly fitted and the seal had been pinched and split in two places allowing a small amount of water behind (but not enough to cover the connector). I can only assume that this was a bodged fitment during the fuel pump collar recall. Dunno if it prompted the fail or not.

The thing is though, despite the FPC failure and the dodgy fuel strip (I now have Henk's module and a 2010 type fuel float) - I love the bike - done 31K miles through most European countries, all the so called Top 10 mountain passes and more besides - all two up with full luggage. I also loon around the Welsh roads with my rep-racer buddies and with Karoo 3s fitted to a spare set of wired rims, challenge my very limited off road skills in the local forests. All on one bike - love it!!
 
I would love to know the input and output resistance values for Henk's float level sensor module which he's no longer selling.
 
The FPC runs the fuel pump just hard enough to keep the fuel lines at correct pressure. When the tank level drops below about 75%, the controller is signalled to run the pump harder. This gives enough return fuel flow to draw fuel from the tank RHS over to the left. I suspect the FPC electronics are bypassed but I don't have a fuel strip any more so mine always runs at part load. A working fuel strip is needed to check out the FPC input wires as the tank level drops.
 


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