Reifen Druck Control

[ESquared]

The TPMS will continue to display pressure for a short while after the bike has come to a standstill.  I haven't timed it.
I wonder if, to save battery life, some sort of centrifugal motion is required to activate a switch internally in the sensor.

Frank

You're on to something, and it just makes me wish I was paying more attention to this detail when I could swear I just "hit the button" and got to the "My Vehicle" screen and the pressures were displayed.

On page 150 (in the "Technology in Detail" section), it repeats the verbiage above and then goes on to say that the sensor readings will continue to display after the bike has come to rest, as follows:  "The sensors continue to transmit the measured readings for some time after the vehicle comes to a stop. Duration of measured data transmission after motorcycle is stationary: min 15 min"

This leads me to believe I was toggling through screens after a ride and, even though the bike was garaged and turned off, it was likely within the 15 minute window when the display was still active.

Hmmm.  So now I'm back to "stuck sensor readings" that don't change even when I top off, deflate and re-inflate, etc.  I'll see what Ed says about that tomorrow.

[Lee]

The TFT seems stuck where it was, and it won't give me a reading at all until I'm about 1/2 mile or so underway,

When you talk to Ed don't get into the TPM display does not match your gauge.
Tell him the display seems to be stuck and it takes at least a 1/2 mile before it shows on the dash.

So, it's true that the TPMS should read upon start-up, yes?

I went to the manual, and it talks about needing to exceed 19mph for it to activate, but my read of it was that it only meant the first time ever.  Here's the text:

Looks like you missed my first reply

[Lee]

The TPMS will continue to display pressure for a short while after the bike has come to a standstill.  I haven't timed it.
I wonder if, to save battery life, some sort of centrifugal motion is required to activate a switch internally in the sensor.

Frank

That's what I have heard and it makes sense.

[Lee]

Yet, it seems that the picture in your post above (Lee) that you're getting a reading from a standstill?  Or was that enroute, after you'd exceeded 19mph on that trip?  Am I just being dense?

I took the picture when I pulled into a gas stop and the bike was still running.

[TriangleRider]

The latest pressures are stored in the connected app, which is very helpful when topping off pressures in the morning. Do the pressures on the app agree with the dash?

[Lee]

Because the BMW system is temperature compensated you will not see a big increase in the TPM display when the tires are hot like you do in most cars.
You'll see a small TPM change when the bike tires get hot but not as much as the display in a car.

[ESquared]

Well, part of the answer is I was being dense, as pressures don't just miraculously display when you fire up the bike. You have to exceed 19mph to activate the sensors every time, but still a little stumped about the significant difference between current readings on the screen and my five other gauges. More digging.

[ESquared]

The latest pressures are stored in the connected app, which is very helpful when topping off pressures in the morning. Do the pressures on the app agree with the dash?

Yes, 40.6 Rear/35.4 Front.  Gauges are reading 44-ish and 37-ish.

[ESquared]

My conversation with my shop's service mgr left me scratching my head a bit, with the bottom line being I'm just going to continue to monitor my monitor.

Probably the most interesting comment was that the TPMS readings through the TFT are "averages" and will change with time as more miles are put on the bike. Don't quite know what to make of that.

Kind of disappointing, but, for now, it's better than nothing.

[Lee]

Try adding a extra 10 PSI or letting out 10 PSI to one of the tires and ride down the block and back to see if the TPM display changes.
Earlier it was mentioned the low pressure warning will come on when the rear is down to 27 or 29. Maybe drop the pressure down to that to make sure the low pressure warning works.

[Lee]

the most interesting comment was that the TPMS readings through the TFT are "averages"

Bull

[ESquared]

the most interesting comment was that the TPMS readings through the TFT are "averages"

Bull

That was what popped into my mind when he made that claim, but I didn't challenge him, not worth the effort.  

As to the notion of deflating/over-inflating and riding the neighborhood, I guess I'm just not willing to let this issue get that much inside my head.  

I carry reliable gauges with me, I'm mindful of proper inflation, so I'll just let it ride for now.  If it's still irking me at the end of the season, I'll take it in for a "warranty check" on the system.

[ESquared]

Well, I talk a good game, but after giving Bluebird (first time I've ever named a motorcycle, but I can see a bit of a beak and some tail-feathers) her first deep bath (Rinse/Muc-Off/Soapy Wash Mitt/Rinse/Foam Bath/Rinse/Leaf Blower/M-F Towel dry/Neighborhood spin/De-Spotting/Honda Aerosol Shine on Tank), I dove back in and compared today's TFT readings to the gauges.  Front was in spec at 36.2, but rear was reading 39.5.  I checked and my two most reliable gauges (digital and pencil) confirmed right around 40. 
So, I topped off again, to about 43.  Will check later today, just to make sure there's not some kind of mystery leak.  No evidence of such a thing during the wash/dry process, but will apply the fine-tooth comb tonight just to be sure.
They're sure pretty when they're all shined up, aren't they (regardless of paint color)? 
Do you see the beak/tail feathers?

   

[Lee]

I noticed on our trip south last month the spec tire pressures on my TFT show 0.5 psi higher than what's called for in the manual.
Debbie's is the same.
Do others see 36.8 and 42.6 PSI on the Tire Pressure screen?

   

[Grumpy Goat]

Very nice photo. I recently purchased a blow dryer for the bike and it performs beautifully, much better than my leaf blower due to the heated air. You might want to give that some consideration. I have a video on the YouTube channel.

My RS’s tires lose pressure slowly over time as does the Tracer’s front tire. The rear tire on the Tracer maintains pressure the best, and it’s the tire with the plug in it.

For me, the RS’s pressures as reported by the TPMS has not indicated any issues (knock on wood) and seems to be accurate enough for my usage. This is not a Swiss watch after all. I tend to inflate +1 psi and then let it naturally go down to maybe -1 psi before I top up and that usually takes a couple of months. That works out good enough for me. I trust my handheld pressure gauge and see the TPMS as a safety feature to notify me of rapid air loss as in a puncture.

[Lee]

I noticed on our trip south last month the spec tire pressures on my TFT show 0.5 psi higher than what's called for in the manual.
Debbie's is the same.
Do others see 36.8 and 42.6 PSI on the Tire Pressure screen?

On this video the Tire Pressure screen also shows 36.8 and 42.6 for Spec.
Fast forward to 3:00
https://www.youtube.com/watch?v=QFy9Ms3_f8g

[ESquared]

I noticed on our trip south last month the spec tire pressures on my TFT show 0.5 psi higher than what's called for in the manual.
Debbie's is the same.
Do others see 36.8 and 42.6 PSI on the Tire Pressure screen?

On this video the Tire Pressure screen also shows 36.8 and 42.6 for Spec.
Fast forward to 3:00
https://www.youtube.com/watch?v=QFy9Ms3_f8g

I guess I'll start rounding up!

At the end of this morning's 90-mile jaunt up to Smithville Lake, I did some more fiddling and have pretty much established that there's been a fair amount of smoke-blowing (or myth perpetuating) going on about how quickly the TPMS/TFT system can update a tire pressure and display it.

During the ride, the back was about 43.7 (just making sure!) but the front was reading about 35.4 (which was odd, because I'd topped it off yesterday afternoon).  

Anyway, both readings held solid throughout today's 90 miles, so when I got home and situated, I topped off the front to 37.5 or so (by my Ryobi pump's gauge), then "hit the button" and (within a few minutes of ending the ride) scrolled through the "Status Line" TWICE and ended up seeing the reading below (36.5!).  

So, it doesn't appear to be some sort of "rolling average" and it doesn't typically read out 2-3 lbs MORE than a hand-held gauge, but more like about a pound LESS.  Now that I've got everything set up at or above the "spec" (I suppose), I'm just going to monitor it.  

More on the pictured Connected Cradle in the "Newbie" thread.

   

[Masione]

So, my questions are:  1)  Is it normal to NOT get a reading through the TFT at all while sitting still (engine off); and 2)  Should I just not sweat it if I'm getting good cross-checks with other devices?

To see the TPM reading you need to go faster than 20 mph. I don't remember the required distance but ours usually comes on in 200 feet or so.
It should not take 1/2 mile if you're going over 20.
As for accuracy it may be your gauges. On our R1200 and R1250 my gauge usually reads within 1 PSI of the dash reading when I first take off.
I use a chart to set the pressure. The TPM readout is compensated to 68F.

If it's 90F in your garage when you check with a gauge you need to read 38 and 44 on your gauge to get the recommended pressure.

That chart is AWESOME!! I am printing it out and posting it on my toolbox for future reference, thanks!

[Masione]

Well, I talk a good game, but after giving Bluebird (first time I've ever named a motorcycle, but I can see a bit of a beak and some tail-feathers) her first deep bath (Rinse/Muc-Off/Soapy Wash Mitt/Rinse/Foam Bath/Rinse/Leaf Blower/M-F Towel dry/Neighborhood spin/De-Spotting/Honda Aerosol Shine on Tank), I dove back in and compared today's TFT readings to the gauges.  Front was in spec at 36.2, but rear was reading 39.5.  I checked and my two most reliable gauges (digital and pencil) confirmed right around 40. 
So, I topped off again, to about 43.  Will check later today, just to make sure there's not some kind of mystery leak.  No evidence of such a thing during the wash/dry process, but will apply the fine-tooth comb tonight just to be sure.
They're sure pretty when they're all shined up, aren't they (regardless of paint color)? 
Do you see the beak/tail feathers?

Where'd ya get them pretty handlebars? (I just sent away for Wunderlich comfort bars). Did you mount them yourself??

[ESquared]

Well, I talk a good game, but after giving Bluebird (first time I've ever named a motorcycle, but I can see a bit of a beak and some tail-feathers) her first deep bath (Rinse/Muc-Off/Soapy Wash Mitt/Rinse/Foam Bath/Rinse/Leaf Blower/M-F Towel dry/Neighborhood spin/De-Spotting/Honda Aerosol Shine on Tank), I dove back in and compared today's TFT readings to the gauges.  Front was in spec at 36.2, but rear was reading 39.5.  I checked and my two most reliable gauges (digital and pencil) confirmed right around 40. 
So, I topped off again, to about 43.  Will check later today, just to make sure there's not some kind of mystery leak.  No evidence of such a thing during the wash/dry process, but will apply the fine-tooth comb tonight just to be sure.
They're sure pretty when they're all shined up, aren't they (regardless of paint color)? 
Do you see the beak/tail feathers?

Where'd ya get them pretty handlebars? (I just sent away for Wunderlich comfort bars). Did you mount them yourself??

Those are the Wunderlich bars, so you're about to have the same set-up.  I had them installed by the dealer prior to delivery.  Big fan of the way it turned out.