2010 1200GS not priming, FCM ok. - Page 2 - BMW R1200GS Forum : R1200 GS Forums
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post #11 of 45 (permalink) Old 18-Nov-2016, 10:28 PM (186) Thread Starter
Greg
 
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still not going, but more info.

After the ride, its been parked for few hours, then no start.
Got some more measurements.
The power to the FPC is turned off by the ECU, well it measures 0.2v as soon as the key is turned on, when it should be 12v to prime.
When cranking, still 0.2v.
A squirt of aerostart, as soon as it fires, 12v at the FPC, then it runs fine. Starts and restarts.

Something is telling the ECU not to power the pump on cold/warm start, but still lets me crank, this rules out switches.
Not getting any fault codes either, which sort of points away from faulty sensor.
Anybody have any idea what would tell the ECU not to power the pump?
Or anybody know know where I can get ECU pin voltages or sensor specifications.

Last edited by tambox; 18-Nov-2016 at 10:55 PM (205).
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post #12 of 45 (permalink) Old 19-Nov-2016, 09:05 AM (628)
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Had basically the same exact problem with my 2005 GS (same pump as a 2010), ended up changing the fuel pump and the problem was solved, bought a cheap $30 unit off Ebay and it lasted for years.
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post #13 of 45 (permalink) Old 19-Nov-2016, 12:16 PM (761)
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Ah yes

Quote:
Originally Posted by tambox View Post
I hoped the darkness of electrical headaches vanished when Lucas stopped, but alas it still exists.
Joe Lucas, the Prince of Darkness...
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post #14 of 45 (permalink) Old 20-Nov-2016, 02:15 AM (344) Thread Starter
Greg
 
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It died at last, which was good, sort of.

Love bike electronics.
I can turn the pump on and off whenever i want with the gs911 through the ECU (but the ECU itself,wont). I can also pulse the injectors with the gs911.
The issue is the ECU is not feeding 12v power to the FPC.

Good things happened today, sort of.
The bike would not start at all, coughed and spluttered when aerostart was added, but would not start.
Which was good in a way, I could complete some more detailed tests.
Still no prime, but if I fire the pump up with the GS911, it gets fuel pressure. Pulse the injectors and it squirts fuel.
Checked fault codes, nix.
After lots of cranking and then finding no spark, I finally get a crank sensor error, existing.
Ran out of daylight and beer, wheres the crank sensor?
The pics I was send do not list it.
Is it one of the cam sensors?
Which comes back to, apparently early 2010GS (mine is) had a cam sensor recall.
Anybody know much about this?
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post #15 of 45 (permalink) Old 20-Nov-2016, 06:08 AM (505)
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Crankshaft (not camshaft) sensor error would make sense, it will kill power to the the pump if it doesn't detect that the motor has started.
Location is under front engine cover.
BMW part # 12727674201 about $125
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post #16 of 45 (permalink) Old 20-Nov-2016, 11:42 AM (737)
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Crank sensor on a '10 is part number 8 in this diagram
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post #17 of 45 (permalink) Old 20-Nov-2016, 10:16 PM (178)
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I keep saying it

This is why love this site...

PS is there a way of finding out if your sensor (or any other recalled bit) has been replaced after a recall?
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post #18 of 45 (permalink) Old 21-Nov-2016, 01:54 AM (329) Thread Starter
Greg
 
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Not impressed.

From my experience, with several "BMW service departments", I would check for loose/over-tightened bolts/screws, burred heads and damaged threads.
From my experiences, any of those would be a good indication it has been touched by a qualified "BMW service department".
Blunt enough?, sorry its a sore point and they charged me for the damage.
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post #19 of 45 (permalink) Old 21-Nov-2016, 06:39 AM (527)
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+1 on finding a different dealer! Appears your dealer is one the Aholes! Be sure to post their name so that others can avoid them as well.

RSmith

15 K1600 GTL
16 R1200 GS/Adv
17 HD Ultra CVO
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post #20 of 45 (permalink) Old 21-Nov-2016, 01:37 PM (817) Thread Starter
Greg
 
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Gone to the only one I trust, me.
Just need some pointers occasionally, BMW points towards the exit door when asked technical stuff, but great online sites like this can be very helpful.
Crank sensor coming out soon, then some measurements, then a diagnosis I will trust.
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