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Fuel pump cutting out?

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Old Jul 13, 2018 | 08:51 PM
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Default Fuel pump cutting out?

All, thanks in advance for your thoughts.

I was experiencing a very intermittent issue where the bike seemed to hesitate and a couple of times died. Today, bike completely died at an intersection and would not restart. Electrical system warning light was illuminated. The lights and everything were still on BUT, when I would flip the start button on and off I did not hear the whirr of the fuel being fed to the engine. Then, after pushing it a little bit, I tried again and it started up fine. Parked it at a friend's house because I didn't know how long it would remain in service. I would appreciate any thoughts as to what you think is likely the problem. Is it a faulty wire to the fuel pump? If so, any straightforward ways to try to deal with it?

It's a 2012 FXS (Blackline).

Thanks,

Bill
 
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Old Jul 13, 2018 | 09:38 PM
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Start by pulling error codes. How old is your battery?
 
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Old Jul 13, 2018 | 09:44 PM
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Battery is only about three years old, and is ALWAYS kept on a tender and gets regular riding.

I don't know how to pull error codes but will look into that next. Thanks for the lead.
 
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Old Jul 13, 2018 | 10:03 PM
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ODOMETER SELF-DIAGNOSTICS
Diagnostic Mode
1. To enter diagnostic mode, press and hold the trip odometer
reset switch located on the left handlebar controls, while
turning the IGN ON.
NOTE
The trip odometer reset switch is located in the left hand control
module. The switch signal is sent to the speedometer over the
CAN bus. Therefore, if there is a problem with the CAN bus,
the odometer self-diagnostic mode may not function.
2. Release the trip odometer reset switch. "diag" will appear
on the odometer display.
3. Press and release the trip odometer reset switch. ECM
will appear on the odometer display. It will have either a
"Y" or an "N" after it, depending if there are any ECM
codes or not.
4. Quickly press and release the trip odometer reset switch
to cycle through the modules. The modules include the
BCM, SPDO, TACH and ABS.
5. Once the desired module is displayed, press and hold the
trip odometer reset switch.
6. If any DTCs are stored in the module, the odometer will
display the DTC. Quickly pressing and releasing the trip
odometer reset switch will cycle through the stored DTCs.
7. When all the DTCs have been cycled the odometer will
display "end".
8. To clear all the DTCs in that module press and hold the
trip odometer reset switch, while a DTC is displayed. If
DTCs are not to be cleared quickly press and release the
trip odometer reset switch.The part number of the module
will be displayed.
9. Press and release the trip odometer reset switch again to
continue to the next module.
10. Make note of all DTCs. Clear all the DTCs and operate
the vehicle to verify DTCs set and are current. Historic
DTCs are not to be diagnosed unless the condition is
reoccurring and intermittent.
11. Turn the IGN OFF to exit diagnostic mode. If IGN is not
turned off, vehicle will exit diagnostics mode when vehicle
starts moving.
 
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Old Jul 14, 2018 | 12:01 PM
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Okay, thanks for the instructions.

I have two BCM error codes: b2118 and b2262

Internet research suggests that they are for "Fuel Pump Output Shorted Low" (b2118) and "Front Brake Switch Stuck" (b2262).

The first error code seems consistent with what I observed when I still had power, my starter was audibly trying to start the engine, but I couldn't hear the pump prime. Do I need to run a new wire to my fuel pump? How do I figure out which wire? Where do I splice it in?

Or if I go to the dealership, what should I make sure they do?

By the way, I think that when I bought the bike (new), a few wires were not routed where they were supposed to go, and there has been unnecessary wear on them as a result. I'm guessing that bundle will have the culprit in it.

Any advice much appreciated.

Thanks,

Bill
 
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Old Jul 14, 2018 | 12:03 PM
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Start with the basics. Get the battery fully charged and have it load tested.
Inspect all fuses and relays for clean and tight connections. Same for the battery terminals and ground cable.
The fuel pump relay is a standard automotive one, try a new one or swap with the starter relay, I think they're the same.
 
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Old Jul 14, 2018 | 12:22 PM
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Makes sense - will do, thanks.
 
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Old Jul 14, 2018 | 01:10 PM
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If you have an idea as to where wires may be compromised in some way go ahead and take a look. It may be as simple as reseating a connection or patching a bare wire. If not I don't see why the dealer won't find and fix the problem? Of course that may be expensive but it will get fixed.
 
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Old Jul 16, 2018 | 03:07 PM
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The Fuel pump comes on and primes for 2 seconds then turns of if the CKP doesn't give the ECM a signal the the engine is rotating. If you turn the ignition off you have to give it 10 seconds before you can turn it on and listen for the pump again.
Does the pump come on when you turn the ignition on after it's been off for 15 seconds?
If it's the original fuel filter I'd say pull the pump and look at filter and hoses. Check all connectors. Pull CKP and take a look at it. Check where the pump grounds for a loose connection.






 

Last edited by Vernal; Jul 16, 2018 at 03:13 PM.
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