K11 Owners Group

BobZ(IL) · Posted: Sat Jun 01, 2013 3:02 pm Post subject: Motronic Unit

Has anyone ever had the Motronic fail to the extent that it needed replaced? That's the diagnosis. Hmmmm.

I've sent used replacement to BMW dealer in Indy, but they can't seem to find time to install it. Took me about 45 minutes to put in new battery requiring removal and replacement of Motronic.

Hoping this bike will be ready in time for HMVll.
_________________
'93 K1100LT
'78 R100S
'05 R1200GS
BMWMOA, CRBMWOA, ABC, K11OG #997

Live well, do good work, enjoy the ride.

SugarHillCTD · Posted: Sat Jun 01, 2013 7:21 pm Post subject:

Bob,

They could have the old one out and the new one in...about 20 minutes, while drinking their coffee..

But do these guys know anything about K1100 bikes??

Good luck.....

John
_________________
John & Cathy

'92 K100RS4V Pearl White SOLD
'04 K1200GT
IBA Several-SS1k, BBG, 50CC NYC to S.F.

Scott_Anderson · Posted: Sat Jun 01, 2013 10:54 pm Post subject:

Are they absolutely certain that it wasn't just a dirty connection at the multi-pin plug?
I had an issue last year with my fuel pump intermittently not working and the problem was a bad/dirty connection at the motronic plug.....
Cleaned it, greased it with some dielectric grease to keep moisture out and all has been fine since....
_________________
Ride safe.

1997 K1100LT 0302488
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1995 K1100LT 0302044(R.I.P.)
1997 R1100RT ZC62149(sold)

Ernie-NH · Posted: Sun Jun 02, 2013 8:24 am Post subject:

Hi Bob...
RE: the Motronic..

I did exactly as Scott told me to do when I first got my "K", and I have done ( and do ) the same religiously EVERY TIME I have to remove/install battery for either storage or maintenance. Clean all Motronic terminals with Contact cleaner and then use a good dielectic grease to avoid any corrosion. Same for all connections to the battery...I also remove the Motronic for storage during the winter, and keep it in a sealed bag at room temp for those 5 or so months!

If I were you, I'd get the Motronic unit back, save the service costs, and just do it yourself.!

Good luck, have fun, ride safe......// Ernie in NH
_________________
AMA,, American Deaf Bikers
Airhead Beemers Club
'11 G650gs
'95 K1100LT
'76 R100/7

BobZ(IL) · Posted: Sun Jun 02, 2013 3:49 pm Post subject:

I'm going to try to get down to Indy this week and get the bike back home. My confidence in the dealership is waning.

We're all on the same wave link, bad connection somewhere. With a west coast trip coming up in July, I was hoping the dealer could get things squared away for me. They have had the bike since HMVl.
_________________
'93 K1100LT
'78 R100S
'05 R1200GS
BMWMOA, CRBMWOA, ABC, K11OG #997

Live well, do good work, enjoy the ride.

SugarHillCTD · Posted: Sun Jun 02, 2013 6:51 pm Post subject:

Bob,

Had the same BAD luck with a certain (not MAX) dealer in NH.

AAAAAAArrrrgh.

Good luck with yours.

John
_________________
John & Cathy

'92 K100RS4V Pearl White SOLD
'04 K1200GT
IBA Several-SS1k, BBG, 50CC NYC to S.F.

BobZ(IL) · Posted: Wed Jun 05, 2013 9:24 pm Post subject:

OK, the Motronic switch did nothing. Next diagnosis is temp. sensors. Anybody had problems with those?
_________________
'93 K1100LT
'78 R100S
'05 R1200GS
BMWMOA, CRBMWOA, ABC, K11OG #997

Live well, do good work, enjoy the ride.

Jim · Posted: Wed Jun 05, 2013 10:27 pm Post subject:

Still at the dealer?

Well, it sounds like it almost has to be electrical - probably some obscure connector. None of the obvious ones, eh?
_________________
Jim
1997 K1100LTSE 94,000 - still has gremlins!
1995 R100RT Classic 16,650 crashed - repaired!
1992 K75RTP 46,000

"We shall not all die, but we shall all be changed."

Number 6 · Posted: Wed Jun 05, 2013 11:46 pm Post subject:

Can you read the Motronic error codes?
_________________
I am not a number, I am a free man.

94 K1100LT

BobZ(IL) · Posted: Thu Jun 06, 2013 9:27 pm Post subject:

Picked the bike up today. Was able to drive it onto the trailer.

Following is dealer's invoice detail:

-Started bike and ran it through fan cycle, no issue
-Check side stand switch OP-normal. Ck side stand switch connection-ok
-Test ride, bike died. Ck fuel pressure-ok, ck inj. pulse w/noid lt=ok.
-Will start & idle but not take throttle.
-Check for faults-none stored. Then ran normal and will not act up.
-Replaced Motronic unit with customer supplied e-bay unit. Died again after warm up.
-Recommend replacement of coolant temp sensor.

These steps occurred over the past few weeks. They were frustrated because it would run when they attempted to diagnose the problem.

I'm still going to disconnect side stand switch.

Any profound thoughts?
_________________
'93 K1100LT
'78 R100S
'05 R1200GS
BMWMOA, CRBMWOA, ABC, K11OG #997

Live well, do good work, enjoy the ride.

Number 6 · Posted: Thu Jun 06, 2013 9:30 pm Post subject:

Side stand switch is on or off, so if it starts that's not the issue.
A few basics: how is the fuel filter and spark plugs? How old is the gas?
When it dies, does it take 5-10 minutes of cool down to start it again? If yes it could be the hall effect sensors (ignition sensors).
_________________
I am not a number, I am a free man.

94 K1100LT

BobZ(IL) · Posted: Thu Jun 06, 2013 10:12 pm Post subject:

SugarHillCTD · Posted: Fri Jun 07, 2013 5:23 am Post subject:

Bob,

Do you know the Hall sensor heat gun test?

If it passes, have you disconnected &/or reconnected any of the ground wires lately?
_________________
John & Cathy

'92 K100RS4V Pearl White SOLD
'04 K1200GT
IBA Several-SS1k, BBG, 50CC NYC to S.F.

Number 6 · Posted: Fri Jun 07, 2013 12:19 pm Post subject:

To test the sensors out of the bike: http://k11og.org/forum/viewtopic.php?p=83698#83698
I have just updated the links to the pictures.
Then do the same with the heatgun.
_________________
I am not a number, I am a free man.

94 K1100LT

Stoked Steve · Posted: Fri Jun 07, 2013 8:08 pm Post subject:

Jim · Posted: Fri Jun 07, 2013 10:56 pm Post subject:

Yeah - mine burned up, too. The bike would sporadically cut off - but then would restart right away - until it didn't...

I ended up fixing mine in the parking lot behind the Marriott in Gwinnett, GA.
_________________
Jim
1997 K1100LTSE 94,000 - still has gremlins!
1995 R100RT Classic 16,650 crashed - repaired!
1992 K75RTP 46,000

"We shall not all die, but we shall all be changed."

BobZ(IL) · Posted: Fri Jun 07, 2013 11:30 pm Post subject:

Thanks to everyone for the suggestions. Got plenty of things to check. Bike has started and run fine each time but I haven't ridden it anywhere yet.

Going to be out of town for a while, but will go to work on it when I get back. Only a few weeks till west coast trip.
_________________
'93 K1100LT
'78 R100S
'05 R1200GS
BMWMOA, CRBMWOA, ABC, K11OG #997

Live well, do good work, enjoy the ride.

BobZ(IL) · Posted: Sun Jun 23, 2013 3:20 pm Post subject:

Ok, back at it. Switched back to original Motronic, cleaned every connection I could find, and took a look at the spark plugs. Shocked

A couple of plugs wires were loose. Pulled the plugs even though just replaced prior to HM lV, looked ok. Tapped leads on till they felt snapped on solid.

Road off to gym, everything good. Coming home from gym she dies. Look at plug wires, one loose. Tap it back on, get home fine. Run through a complete fan cycle at home, everything good. 3 miles around neighborhood, all good.

Question, could one or two loose plug wires make the bike die completely? Maybe a function of the Motronic?
_________________
'93 K1100LT
'78 R100S
'05 R1200GS
BMWMOA, CRBMWOA, ABC, K11OG #997

Live well, do good work, enjoy the ride.

Number 6 · Posted: Sun Jun 23, 2013 3:50 pm Post subject:

Once I was able to start the engine with 2 inverted spark plug wires, I had explosions in the exhaust but it did run so I doubt...
Again, test the hall (ignition) sensors.
_________________
I am not a number, I am a free man.

94 K1100LT

BobZ(IL) · Posted: Sun Jun 23, 2013 9:48 pm Post subject:

Did a search on testing HES and couldn't find much. Any ideas?
_________________
'93 K1100LT
'78 R100S
'05 R1200GS
BMWMOA, CRBMWOA, ABC, K11OG #997

Live well, do good work, enjoy the ride.