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"K13S/R" Technical Q&A K1200S/R Technical Questions/Answers

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Old 03-22-2018, 04:03 AM
johann_muller johann_muller is offline
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BMW K1300R - Cluster Cycling and Occasional cut-out while riding (Solved)

Hi

I incorrectly posted this to the 1200 area, and am reposting this here now.

I thought I would quickly recap a weird problem I just had on my K1300R (2008). I believe it is solved, but time may prove me wrong. I only managed to find one other blog post about this issue, on another site with a different bike. The ignition switch is shared amongst many BMWs

The symptoms

1. Cluster and pre-start check would sometimes take time to start. And sometimes cycle through more than once.
2. 10444 Fuse activated for component block 3 (starter relay, Immo (EWS) ring aerial, ignition coils, injectors) would store whenever the above mentioned cycling happens.
3. Bike would occasionally cut out during riding, (3 times with me, always under hard acceleration) also storing the above fault code
4. The clincher in this case, when you press up against the switch, it would cut the ignition. Not every time, but enough to make us suspect the ignition switch.

The Cure:

Replace the ignition switch (61318543110), takes about 30 minutes, needs the correct torque bits.


The Post Mortem
I opened the old switch up, to have a look see. The internal resistance of the micro-switch fluctuates from 0 (where it should be) to about 20 ohms. Probably enough resistance to overload the logic circuit connected to the switch and cause the trip code 10444. The unit contains a simple micro-switch and some traces. It is not a current device, but probably just sends a signal to the ECU to say the ignition is on. All the work happens in the ECU.

It was such a weird issue, that I thought it may be useful to share.
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Old 03-22-2018, 07:22 AM
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KiwiMat KiwiMat is offline
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Re: BMW K1300R - Cluster Cycling and Occasional cut-out while riding (Solved)

Some people have had similar problems and the cause has been flapping keyring bits slowly rooting the key chamber, in turn causing the bike to switch off randomly, or not start. Evidence is sometimes discolouration around the hole.
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Old 03-24-2018, 07:09 AM
Heapy Heapy is offline
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Re: BMW K1300R - Cluster Cycling and Occasional cut-out while riding (Solved)

Quote:
Originally Posted by KiwiMat
Some people have had similar problems and the cause has been flapping keyring bits slowly rooting the key chamber, in turn causing the bike to switch off randomly, or not start. Evidence is sometimes discolouration around the hole.

And you wouldn’t want discolouration around your hole. Not that there’s anything wrong with that...
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Old 03-24-2018, 09:34 AM
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Re: BMW K1300R - Cluster Cycling and Occasional cut-out while riding (Solved)

Quote:
Originally Posted by Heapy
And you wouldn’t want discolouration around your hole. Not that there’s anything wrong with that...
Grahame:

I'm sitting here reading this thread - Johann is very technical and descriptive - Mat responds with some info he has learned - all good stuff - then your post - you were almost the cause of me choking to death.

I was eating and started laughing/choking - man only two posts to send this thread spinning - very funny - normally I don't get caught off guard.

Johann great post keep them coming and don't mind our warped sense of humor - you will never find a better bunch of riders anywhere and this site has more knowledge of BMW motorcycles many times more than BMW has.
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Old 03-24-2018, 02:52 PM
johann_muller johann_muller is offline
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Re: BMW K1300R - Cluster Cycling and Occasional cut-out while riding (Solved)

It cracked me up to.

I have been monitoring the bike. Commuted twice since I changed the switch. The dash cycling and fault codes are gone.

I will know for sure after next week if it is fixed.
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