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

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  #1  
Old 07-10-2013, 04:32 PM
papaed papaed is offline
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Tire pressure sensor

My sensors are off by as much as 8 lbs low and are constantly tripping the warning lite.have checked pressure against multiple gauges to confirm this.Is there a battery in the sensor that powers the signal ? Dealer wants to change them for about $400.00 parts and labor.ridiculous.the rear tire warning won't go off until 45 psi by gauge then the readout is at 37 psi.please do not respond that the gauges are wrong cuz even the dealers gauge reads the same as mine.Anybody ?
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Old 07-10-2013, 04:56 PM
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Re: Tire pressure sensor

My sensors are off by 5 to 6 PSI on my 1300s. According to my local dealer, they can't be re-calibrated. Further more, he said, even if I bought a new set, they may also read off by a similar amount!
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Old 07-10-2013, 06:20 PM
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Re: Tire pressure sensor

Normal buddy. And annoying as hell indeed. It's the idiotic 'compensating' algorithm to blame. If my rear tire is 41.5 psi, the stupid TPMS goes off. I have to have it at 42. Since I'm only 155# and always ride solo, I like my rear tire at 40 psi, but can't do that on this bike. The front tire is a bit more forgiving, but I always have it at 36, so no issues. The front is about 6 psi off, and the rear about 8. But I much prefer to have the piece of mind of the TPMS, even with that inconvenience. Wish BMW hadn't recommended 36/42 for EVERY riding scenario; it doesn't make any sense (it used to be 36/36 solo and 36/42 fully-loaded). TPMS would have been more forgiving in the rear with 36 than 42. Oh well. Take care man.
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Old 07-10-2013, 07:01 PM
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Re: Tire pressure sensor

Whether the temperature compensation component of the sensors is of value is likely debatable, but not by me. Following the step by step procedure in the owners manual and I did not see any warning on my previous K1300S or my current R1200GS.

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Old 07-10-2013, 08:31 PM
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Re: Tire pressure sensor

Thanks.It is nice to know I'm not out here by my own self.My service manager must have interned in Oklahoma as that is what he told me word for word.
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Old 07-10-2013, 09:59 PM
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Re: Tire pressure sensor

Am I mistaken, or can the GS911 calibrate these TPM?
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Old 07-11-2013, 12:02 AM
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Re: Tire pressure sensor

Quote:
Originally Posted by jargon
Am I mistaken, or can the GS911 calibrate these TPM?
Mistaken, unfortunately. I called them specifically for that, and the guy said they had no plan to ever incorporate that feature into the tool. It is what it is.
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Old 07-11-2013, 06:30 AM
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Re: Tire pressure sensor

Quote:
Originally Posted by papaed
My sensors are off by as much as 8 lbs low and are constantly tripping the warning lite.have checked pressure against multiple gauges to confirm this.Is there a battery in the sensor that powers the signal ? Dealer wants to change them for about $400.00 parts and labor.ridiculous.the rear tire warning won't go off until 45 psi by gauge then the readout is at 37 psi.please do not respond that the gauges are wrong cuz even the dealers gauge reads the same as mine.Anybody ?

Please note that the TPS warning system re-calculates the number from the sensor to the pressure at 20° Celsius (68° F.) So only at that temperature the TPS value will correspond (more or less) with a seperate gauge.
But I agree, 8 lbs off is a bit too much. Like that $400!
Perhaps you can do part of the work yourself, like taking the wheels off and maybe dismounting the tyres. All thats left for the dealer to do, is replace the sensor batteries (if possible), remount the tyres and have the sensors do the "handshake" procedure with the bike's computer.
Say half an hour shop time?...
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Old 07-11-2013, 06:38 AM
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Re: Tire pressure sensor

Quote:
Originally Posted by jargon
Am I mistaken, or can the GS911 calibrate these TPM?

The GS911 cannot calibrate the tps but it can perform other tasks dealing with the tyre pressure sensors and their batteries.

http://www.i-bmw.com/showthread.php?t=41968
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