2006LT will not start - BMW Luxury Touring Community
 
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post #1 of 11 Old Mar 22nd, 2014, 4:23 pm Thread Starter
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Unhappy 2006LT will not start

Finally replaced our old '99 LT (which was totaled by the insurance company after a crash- but that is another story), with a new-to-us 2006 with EHCS, anti-theft fob, full sound system, etc.

As is my custom, the first thing I do is a thorough going-over, replacing all fluids, etc. This is what was done:

1. Replaced engine oil/filter.
2. Replaced transmission/final drive oil.
3. Drained/replaced coolant.
4. Checked valve clearances (all exhaust valves are 1 thousand too tight, four intake valves are 1 thousand too tight). left them alone for another day.
5. Replaced fuel filter, pump inlet screen, internal tank hoses, fuel pump upper/lower vibration mounts, and fuel pump assembly tank gasket.
6. Replaced spark plugs. Old ones looked OK.

Now she will not start. Turns over fine, but will not start. Twice, it sounded like it caught, but not any more.

This is what I have done so far:

1. Placed the battery on a 6A unregulated charger to continue troubleshooting.
2. Checked the fuel disconnects- they look OK (gas drips out of both when disconnected).
3. Verified the plug wires appear to be seated and in the correct spot.
4. Checked the fuel filter is installed with the arrow pointing away from the pump, all internal hoses are clamped tight with no kinks.
5. I originally thought I was hearing the fuel pump, but I started to doubt it, so I disconnected the pump with the ignition on, then reconnected it. No sound.
6. Checked the fuel pump power- no volts with ignition on.
7. Checked the fuel pump fuse (fuse block 1 fuse 6?- 7.5A). Fuse OK.
8. Tried to nail it down by cranking while spraying starter fluid in the right-hand air intake. No start. No attempt to start.
9. The LED that should indicate activation of the immobilizer is out- but I am not sure how that system works.

All of the Tupperware is still off, including the radio unit. Wonder if that is part of the problem?

Any suggestions are welcome!

Current:
2006 BMW K1200LT
2010 BMW R1200RT
Previous:
1999 BMW K1200LT
2007 Yamaha FZ6
1986 Suzuki GS550L
1985 Suzuki GS650L
1977 Kawasaki KZ650
1975 Kawasaki F7
1973 Honda CB175
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post #2 of 11 Old Mar 22nd, 2014, 5:30 pm
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Re: 2006LT will not start

Quote:
Originally Posted by r_figueroa View Post
Finally replaced our old '99 LT (which was totaled by the insurance company after a crash- but that is another story), with a new-to-us 2006 with EHCS, anti-theft fob, full sound system, etc.

As is my custom, the first thing I do is a thorough going-over, replacing all fluids, etc. This is what was done:

1. Replaced engine oil/filter.
2. Replaced transmission/final drive oil.
3. Drained/replaced coolant.
4. Checked valve clearances (all exhaust valves are 1 thousand too tight, four intake valves are 1 thousand too tight). left them alone for another day.
5. Replaced fuel filter, pump inlet screen, internal tank hoses, fuel pump upper/lower vibration mounts, and fuel pump assembly tank gasket.
6. Replaced spark plugs. Old ones looked OK.

Now she will not start. Turns over fine, but will not start. Twice, it sounded like it caught, but not any more.

This is what I have done so far:

1. Placed the battery on a 6A unregulated charger to continue troubleshooting.
2. Checked the fuel disconnects- they look OK (gas drips out of both when disconnected).
3. Verified the plug wires appear to be seated and in the correct spot.
4. Checked the fuel filter is installed with the arrow pointing away from the pump, all internal hoses are clamped tight with no kinks.
5. I originally thought I was hearing the fuel pump, but I started to doubt it, so I disconnected the pump with the ignition on, then reconnected it. No sound.
6. Checked the fuel pump power- no volts with ignition on.
7. Checked the fuel pump fuse (fuse block 1 fuse 6?- 7.5A). Fuse OK.
8. Tried to nail it down by cranking while spraying starter fluid in the right-hand air intake. No start. No attempt to start.
9. The LED that should indicate activation of the immobilizer is out- but I am not sure how that system works.

All of the Tupperware is still off, including the radio unit. Wonder if that is part of the problem?

Any suggestions are welcome!
Given the job that was done around the fuel-pump AND give the symptoms, it sounds like a fuel problem (not ignition).
When you turn ignition ON the fuel pump should run for 1 or 2 seconds if the starter-Safety interlock is in "ALL OK" mode. This implies that you are in neutral if side-stand down - also I "think" the electro-hydraulic center stand will behave like side-stand for this check.

Normally when 1 item of the safety-interlock is NOT OK, the starter does NOT turn over. But you said yours did... humm... Did you pull clutch-lever while starter button was pushed ?

The best way to check IF the safety-interlock is not stopping the pump from operating, is to move the kill-switch from center to left OR from center to right. Everytime you will return kill switch to center position, the fuel pump should prime for 1 or 2 seconds.

I would also check function of the pump in stand-alone mode by undoing connector (just under the flange assy) and apply 12 volts source to it for few seconds (you cannot miss that noise). BROWN wire is (-) and GREEN+WHITE is (+) for the 12 volts source on pump connector. Possible the pump wires are damaged inside and no current is getting to the pump.

-------------------------------------------------
John (Montreal, CANADA)
K1200RS (2002 IceBlue/Red - 96,000 miles)
-------------------------------------------------
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post #3 of 11 Old Mar 22nd, 2014, 6:51 pm Thread Starter
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Re: 2006LT will not start

Thanks for the suggestion.

Applying 12V directly to the pump connector gets me a soft thump, but no pump noise. Checked the resistance of the pump and wiring with a meter, got a dead short (which is what I would expect if the wiring is OK). Applying 12V through my meter in current mode blew the internsl 10A fuse in the meter. If I am reading the schematic correctly, the pump is fed from a 7.5A fuse, but this could simply be starting current blowing a fast-acting fuse.

I did find my 20-year old timing light and confirmed that I get spark on #2 & #4 cylinders (clamp will not fit on 1 & 2).

The noise and high current suggest the pump is locking up. I'm losing the light, so I am calling it a day.

Current:
2006 BMW K1200LT
2010 BMW R1200RT
Previous:
1999 BMW K1200LT
2007 Yamaha FZ6
1986 Suzuki GS550L
1985 Suzuki GS650L
1977 Kawasaki KZ650
1975 Kawasaki F7
1973 Honda CB175
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post #4 of 11 Old Mar 22nd, 2014, 9:09 pm
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Re: 2006LT will not start

I'm not the expert on BMW's but I have a similar problem with mine ...an intermittent electrical snag with the fuel pump not priming when I turn the ignition on. Sailer mentioned a procedure to test the pump by jumping it with a12volt sorce...if the fuel pump does anything other than whirr for two seconds, it's gone south. This is where I would start, for without the fuel injection being pressurized by the pump, the bike will not start....period. Check all the wiring going to the pump for cuts, bad connections etc. If all wires look good, jumper it with a twelve volt source (I believe there is an aux connector next to the clutch bleeder that you can use for a source). If your pump is not priming for approximatly two seconds, you need a new one. I hope this help out. Please let's us know how it works out! Now if only I can figure out why my bikes fuel pump is intermittent.

Steve
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post #5 of 11 Old Mar 22nd, 2014, 9:15 pm
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Re: 2006LT will not start

One more thing...if you find that your pump is faulty by connecting it directly to the 12volts, consider yourself lucky because trying to diagnose the starter interlock system can be quit frustrating. God luck and safe riding!

Steve
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post #6 of 11 Old Mar 23rd, 2014, 12:24 am
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Re: 2006LT will not start

When you re-installed the tank, did you reconnect the electrical for the fuel pump (right side of the bike, just under the Tupperware)?

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post #7 of 11 Old Mar 23rd, 2014, 2:47 am
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Re: 2006LT will not start

Quote:
Originally Posted by r_figueroa View Post
Thanks for the suggestion.

Applying 12V directly to the pump connector gets me a soft thump, but no pump noise.
Here you got it. Something wrong with the pump.

Born to be wild so why not

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post #8 of 11 Old Mar 23rd, 2014, 7:20 am Thread Starter
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Re: 2006LT will not start

Noticed that the fuse numbering in the fuse blocks did not match the schematic in the Clymer manual. Went through and checked every fuse- found a blown 10A fuse in the other fuse block. Replaced the fuse, and now I get power to the pump connector.

New pump will be ordered today.

Thanks for all the help,

Current:
2006 BMW K1200LT
2010 BMW R1200RT
Previous:
1999 BMW K1200LT
2007 Yamaha FZ6
1986 Suzuki GS550L
1985 Suzuki GS650L
1977 Kawasaki KZ650
1975 Kawasaki F7
1973 Honda CB175
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post #9 of 11 Old Mar 23rd, 2014, 7:35 am
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Re: 2006LT will not start

When I changed the hoses on my fuel pump last year, my bike would not start. I took it apart again and I found that one of the little plastic impeller blades had broken off and jammed the pump. I think they get brittle in the fuel over the years. Broke off during the jostling. Replaced the pump and it worked fine. Blew the fuse when trying to start.

2006 R1200RT
2005 K1200LT Ocean Blue
2003 K1200LTE Black
Totaled Oct 2, 2010
2006 Kawasaki Vulcan 2000
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post #10 of 11 Old Mar 25th, 2014, 7:02 pm Thread Starter
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Smile Re: 2006LT will not start

Replaced the fuel pump. She runs!



Now for the rest of the work list...

Current:
2006 BMW K1200LT
2010 BMW R1200RT
Previous:
1999 BMW K1200LT
2007 Yamaha FZ6
1986 Suzuki GS550L
1985 Suzuki GS650L
1977 Kawasaki KZ650
1975 Kawasaki F7
1973 Honda CB175
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post #11 of 11 Old Mar 25th, 2014, 8:57 pm
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Re: 2006LT will not start

Leave it up to the menbers of this forum - they will leave no member
stranded . . . especially one who picks up the tools, opens the manual, has
instruments and gets their hands dirty!!

Congrats on the restart . . .

Dan Finazzo
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