2010 1200GS not priming, FCM ok. - BMW R1200GS Forum : R1200 GS Forums
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post #1 of 40 (permalink) Old 14-Nov-2016, 01:39 AM (318) Thread Starter
Greg
 
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2010 1200GS not priming, FCM ok.

I have read a lot of interesting information on this site over the years, but now I have a problem and was seeking some help.

I have 2010 twin cam 1200GS, great reliable bike, until last Saturday.
Switched it on and the pump did not prime.
Cranked for ages, nothing.
On and off many times, still no prime.
Squirt of aerostart into each throttle body, fired up and runs fine, no starting problems for the rest of the day, even after a few hours rest.
Sunday, would not prime or fire. GS911 said pump off, all the time. Measured the power to the FPC, would not light test light, ie no power.
Squirt of aerosart again, as soon as it fires on the aerostart, the pump powers up.
The FPC is the black one and looks perfect, removed it, still sealed and spotless underneath.
Today, primed and started as per normal.

At home this is not a major issue, annoying, but can be worked around.
Different story story when out in the sticks.

Anybody have any suggestions?
Thanks.

Last edited by tambox; 14-Nov-2016 at 01:44 AM (322).
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post #2 of 40 (permalink) Old 14-Nov-2016, 05:09 AM (464)
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Interesting

Never experienced anything like it on my '10. My only starting hiccup was a low battery. Reckon Graeme (gdayjr) might have an idea.
Greg.
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post #3 of 40 (permalink) Old 14-Nov-2016, 05:01 PM (959)
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No. never heard that one before.

I fitted a Lithium Iron Battery on my last few bikes, as i would hate to be stuck somewhere and not be able to start the bike.
I doubt it is a battery voltage problem though.

The GS911 points to the issue, but i have no idea what the fix is.

There might be some help in this article i found a while ago.

Motorcycle Info Pages - R1200GS Electrical stuff > Fuel Pump Controller Bypass

Graham Day. Sydney Australia
2005 R1200GS 93,000km (Stolen)
2004 R1200GS. 88, 000 km
2007 R1200GS. 34000 km.
current bike. 2010 R1200GS. 45000 km
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post #4 of 40 (permalink) Old 14-Nov-2016, 10:10 PM (174) Thread Starter
Greg
 
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Thanks Greg and Graham,

Yep had the low battery issue in the past, so I connected jumpers to a car this time, made no difference.
Read lots about FPC, but nothing is similar, except no go.
Just annoyingly weird, primed and started fine today.

To work on it any further I need the wiring diagram for the fuel pump system.
What controls the the power to the FPC?

Or better still, somebody else thats fixed the same issue
We all live in hope.

Last edited by tambox; 14-Nov-2016 at 11:41 PM (237).
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post #5 of 40 (permalink) Old 15-Nov-2016, 03:31 PM (896)
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When I bought my '05 this summer, there were 6 recalls that had never been done. 2 of them involved the fuel pump and fuel pump controller. Don't know if this recall applies to your '10. Mine was running fine but it was a freebie so I had it done.

'05 1200 GS
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post #6 of 40 (permalink) Old 15-Nov-2016, 08:54 PM (120)
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Wiring diagram is easy.

Quote:
Originally Posted by tambox View Post
Thanks Greg and Graham,

Yep had the low battery issue in the past, so I connected jumpers to a car this time, made no difference.
Read lots about FPC, but nothing is similar, except no go.
Just annoyingly weird, primed and started fine today.

To work on it any further I need the wiring diagram for the fuel pump system.
What controls the the power to the FPC?

Or better still, somebody else thats fixed the same issue
We all live in hope.

http://www.r1200gs.info/R1200GS-WD2.pdf

Graham Day. Sydney Australia
2005 R1200GS 93,000km (Stolen)
2004 R1200GS. 88, 000 km
2007 R1200GS. 34000 km.
current bike. 2010 R1200GS. 45000 km
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post #7 of 40 (permalink) Old 16-Nov-2016, 12:57 AM (290) Thread Starter
Greg
 
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Thanks, sort of.

The diagram has answered some questions, yes the pump 12v power is directly controlled from the ECU
I will have to go through all the inputs and see what could tell the ECU not to power the pump.

I have also noticed that when I first turn the key on the pump fires up for a couple of seconds, as it should.
But, if I turn it off, then back on again, the pump wont fire up. If I wait, then turn it on, it fires up again. Hopefully that is a timer in the ECU.

Still running fine ATM.
Makes testing harder, love intermittent faults, hopefully it takes another 6 years to return
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post #8 of 40 (permalink) Old 18-Nov-2016, 05:52 PM (994) Thread Starter
Greg
 
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Its back

Started the bike this morning, all ok.
Let it idle to warm up, while I changed.
Motor stopped.
Would not start.
Would not prime.
Left it for 25min, starts and runs fine.
Took the tank covers off, wobbled wires with it running, no problems.

Any good ideas?
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post #9 of 40 (permalink) Old 18-Nov-2016, 06:57 PM (039)
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bearing in mind

that I believe auto-electricals are a form of dark magic, is there some sort of sensor, solenoid or sender unit in the fuel system that's cactus? Fuel pump connector? Partial/intermittent fuel blockage shutting down the pump? previous labor government?
Gotta be something straightforward mate.
try throwing a 12" shifter at something inanimate while screaming obscenities - often makes me feel better in these situations.
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post #10 of 40 (permalink) Old 18-Nov-2016, 09:03 PM (127) Thread Starter
Greg
 
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Not Lucas, but nearly as annoying.

I hoped the darkness of electrical headaches vanished when Lucas stopped, but alas it still exists.

Just came back from 3hr ride, many starts/stops.
Perfect all the way.

Put new fuel in on the way home, see if that changes anything.
As that was the only difference since the problem started.
I'll give it a sip of metho as well.

PS, I kicked a tyre and swore at it, but that didn't work, with me or the BM.
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