K11 Owners Group

cafedeush · Posted: Fri Jan 02, 2015 7:32 am Post subject: 94 K1100 Motronic Pin Missing

Im just in the process of reassembling after a complete teardown. The frame is still off being painted but in the mean time I thought I would start to reconnect some of the wiring. What I've just noticed is that one of the pins on the motronic unit looks to be missing and I cant find a diagram showing what it does. It looks very slightly corroded so I don't think its snapped recently. I'm just hoping its something redundant like the ABS as I've removed it. Does anyone have a picture of the pins and their functions? I could only find K100 pics. I believe its pin 32 that's missing.

thanks
Deush

**edit - I've just seen this one on fleabay and it has the same pin missing. Coincidence? I've seen other pics of the same model (1464710) and it has the pin. Cat v non Cat maybe?
http://www.ebay.com/itm/BMW-K-1100-LT-RS-BOSCH-Motor-Steuergerat-Motronic-1464710-0261203331-/191398880406
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'95 K1100LT
'83 R65

Scott_Anderson · Posted: Fri Jan 02, 2015 8:51 am Post subject:

I can make up a listing when I get home from work later today, but at just a quick glance at my schematics, pin 32 is designated for a hall sensor connection.
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Ride safe.

1995 K1100LT 0302044
1997 R1100RT ZC62149
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
1997 K1100LT 0302488(R.I.P.)

cafedeush · Posted: Fri Jan 02, 2015 8:56 am Post subject:

Thanks Scott ...I hope you're wrong or it sounds like I'm shelling out for a new unit Sad

_________________
'95 K1100LT
'83 R65

Inge K. · Posted: Fri Jan 02, 2015 9:39 am Post subject:

By judging the picture in the link it looks to me that it's pin #15 that is missing.
That is unswitched power input, which I would guess is for memory only.

cafedeush · Posted: Fri Jan 02, 2015 10:01 am Post subject:

I think you're right about the pin number...I was reading the pin from the cable connector and think i may have got it upside down...duh. thanks!
_________________
'95 K1100LT
'83 R65

Inge K.

cafedeush · Posted: Fri Jan 02, 2015 10:22 am Post subject:

yeah I'm sure its exactly the same with the same numbers...I think we only have non cat models in Aus.
Is it just a coincidence its the same pin do you think?
_________________
'95 K1100LT
'83 R65

Inge K. · Posted: Fri Jan 02, 2015 10:33 am Post subject:

Scott_Anderson · Posted: Fri Jan 02, 2015 9:13 pm Post subject:

Here's what I was able to decipher from schematics..

1: switched ground for fuel pump relay(motronic completes the ground path for the fp relay coil)
2: switched ground for fan relay
3: diagnostic plug term #1 and inst cluster term #10(temp indicator light)
6: hall sensor
7: water temp sensor
8: throttle position sensor pin #3
9: throttle position sensor pin #1
12: throttle position sensor pin #2 and CO potentiometer pin #3
13: frame ground
14: ground input from (CO pot term #1, water temp sensor, air temp sensor)
15: power input from fuse #5(constant un-switched)
19: inst cluster term #16(tach) and switched ground ign coil #1
20: switched ground ign coil #2
21: frame ground
22: frame ground
23: hall sensor
24: input air temp sensor
26: frame ground
27: switched ground for fuel injectors
28: CO potentiometer pin #2
29: diagnostic plug term #3
30: input from O-2 sensor
31: throttle position sensor pin #4
32: hall sensor
33: switched power(also fuse #5 but switched)
_________________
Ride safe.

1995 K1100LT 0302044
1997 R1100RT ZC62149
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
1997 K1100LT 0302488(R.I.P.)

cafedeush · Posted: Fri Jan 02, 2015 9:18 pm Post subject:

thats awesome...thanks for that!
_________________
'95 K1100LT
'83 R65

Inge K. · Posted: Sat Jan 03, 2015 12:19 am Post subject:

Mike d · Posted: Sat Jan 03, 2015 6:01 am Post subject:

Hi Scott,

Thanks for the pinout information. Was that from your 95 or 97 bike?

Does anyone know if they would apply to a 94 machine?

Mike

Inge K. · Posted: Sat Jan 03, 2015 6:49 am Post subject:

Regarding the pinout, it's similar from 07/93 (-94 year model) to 04/99.

Mike d · Posted: Sat Jan 03, 2015 10:01 am Post subject:

Thanks Inge.

Mike

Scott_Anderson · Posted: Sun Jan 04, 2015 11:49 pm Post subject:

If are fluent with German or a translator...........

Here's a web site with very good information. I think this man knows a lot when it comes to K-bikes....

This will take you to his schematics page for the 1100.

http://k-technik.pytalhost.com/index.php?option=com_content&task=section&id=7&Itemid=53
_________________
Ride safe.

1995 K1100LT 0302044
1997 R1100RT ZC62149
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
1997 K1100LT 0302488(R.I.P.)

Mike d · Posted: Mon Jan 05, 2015 7:30 am Post subject:

Hi Scott,

Thanks for the reminder of that site, I have used it in the past, but not recently. Time to get the translator out.

Mike

Ernie-NH · Posted: Mon Jan 05, 2015 8:30 am Post subject:

Good morning all….

Regarding " K-Technik"… the link which Scott provided and the parallel links on the K-Technik web site are the Bible for K Bike Owners and Mechanics.. If you cannot read German or know the German terms, there is no shortage of people here or other web resources that will help you find (translate) exactly what you want. Don't be shy !

Best regards an good luck….// Ernie in NH
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