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Discussion Starter #1
Hello all.

I have been reading a lot about fixing the TPMS sensors on this site and the iBMW.com site.

I changed my tires last night and put new batteries in each of my sensors and reinstalled them.

I thought I read somewhere that the system should reset itself after a few miles of riding once the sensors synched with the head unit again. However, mine did not. I rode the bike for approximately 10 miles and reached speeds of about 55-60 MPH a few times.

I still have the same reading on the computer as before, the system shows only dashes for both front and rear......and of course the great big giant yellow triangle.

The build date for my K12GT is late 2006 to the best of my knowledge.

Question: Do I have to take this thing to the dealer to get them to clear the code and reset the system?

Many thanks in advance for any specific responses to this issue.
 

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Based on my experience with replacing the battery in the rear sensor I would say no you do not have take it to the dealer. Mine took quite a while to show up but it did eventually start working and worked for several hundred miles before it became intermittent. It continues to be intermittent, works one day and not the next. It must be an poor connection to the battery as the first failure came after a particularly rough stretch of gravel road. It'll be awhile before I have time to take the tire off and and attempt a repair. Am certainly tired of the yellow triangle, but will give it one more go before I buy a new sensor.
Did you solder the battery tabs to the tabs from the board?
I only soldered the top tab but not the bottom one.
 

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Discussion Starter #3
solarmoose said:
Did you solder the battery tabs to the tabs from the board?
I only soldered the top tab but not the bottom one.
I didn't solder either of them on either sensor. The bottom tab connects just fine so I could tell. Yes, the top tab could be suspect, but I used some rather sticky tape and made it flat with the battery and held it in place. I used hot glue to secure the battery in place and cover the area similar to they way it was after original manufacturing.

Oh, well. I tried and I thought it would work. I wish there was a way to test them out before putting them back on the wheel.....that's what sucks about it. No way to verify.

Maybe I'll unhook the battery and try to reset everything and see if that helps anything.
 

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Do not jury-rig the battery connections, they will fail for sure... eventually at least, if not right away. The only right way to make the connections is solder. You can't solder directly to a standard battery but you can order the exact battery with pre-attached solder tabs from any electronics supply house (DigiKey, etc.). They don't cost any more than the regular batteries.
 

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I ordered the batteries from Amazon

Will solder both tabs next time. And yes, it would be nice to know it was transmitting
before putting the tire back on. I read somewhere about mounting the sensor to something
that spins to achieve 15+mph and that would "turn" it on. I assume if that was done near the
bike that the TPMS ECU would recognize it. May have to try that.
 

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Discussion Starter #6
Well...I went out on the bike for another couple hours yesterday and it doesn't seem like the TPMS will connect. My belief is that the head unit crashed on me, but I don't know that for sure.

I just don't see how it is possible that BOTH the batteries top tabs aren't connected the way I put them back together.

I guess I'll just have to deal with the yellow triangle until the next time I change the tires.....or the rest of the time I own this bike. :clap:
 

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Tom07K1200GT said:
I just don't see how it is possible that BOTH the batteries top tabs aren't connected the way I put them back together.
If you only used tape to attach the terminals to the batteries then... it's possible.
 

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Discussion Starter #8
smiller said:
If you only used tape to attach the terminals to the batteries then... it's possible.
It is also possible that there is life on Mars. I am confident in my abilities to repair things, Sir. Not saying that I always do it correct..........or the way others would do it, but it usually works out.
 

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Discussion Starter #10
smiller said:
Sorry, not meant as an insult. It's just that taped connections don't work reliably no matter how careful you are.

No issues. :teeth

I used some really sticky tape to hold the tabs down, and then I used a hot glue gun to seal everything up again while holding the tab down tight to the battery with a punch. It is very possible that the connection isn't reliable simply because I didn't solder it. I read somewhere and watched a YouTube video where some folks were saying not to solder the connection because it wouldn't take to the battery very well.

It is what it is at this point. I think I need to get the head unit checked out to see if it took a crap on me.

Thanks to all for the responses. These forums are always a huge help for me.
 

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Tom07K1200GT said:
I read somewhere and watched a YouTube video where some folks were saying not to solder the connection because it wouldn't take to the battery very well.
That is correct, you cannot solder directly to the battery (meaning a standard battery without solder tabs.) Even if you get the solder to stick properly the heat will damage the battery for certain. The only reliable replacement is a battery with solder tabs.
 

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Discussion Starter #12
A little bit more on this topic to provide below.

I just got back from a 1,500+ mile trip to the Smokies and the Blue Ridge Parkway, The Dragon, The Snake and a ton of other great roads out East. On our trips, we always like to stop in Asheville, NC for lunch if we can. This time we stopped at the Asheville BMW dealer, where we know some of the guys well who work there.

I had a chat with the dudes in the service department about the possibility of "disabling" the TPMS system. The tech I was talking to called BMW HQ (or something like that....he said) and asked if they could remap the computer and take out the TPMS as well as the brake pad sensor stuff. He basically said that BMW might be able to do it, but they'd have to send through a new "vehicle order" without those options, wipe out my existing computer and upload the new "vehicle order." They said they've never had a request like that and frankly didn't know if it would even work or not. Cost for this type of attempt was never even discussed, as it just sounds expensive thinking of it.

So, I have resorted to forgetting about all of this. I'm not paying $360 for two new sensors and then paying the shop rates to pair them up to the controller. Just not worth it. I know it sounds ignorant on a bike that stickered out at over $20K, but I don't need this system and don't want it either, unless it works correctly without much maintenance.

Thanks to all for their replies on this thread. If I make any sort of major breakthrough with this TPMS system, I'll surely post it here.
 

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GS911? It can program and test the RDC sensors.
 
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