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Old 04-02-2012, 11:46 PM   #1
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TPMS surprise

I religiously watch my TPMS and Sunday got a rude awaking. We were parked in a Wallymart for the night. Before we set out I checked the monitor and all the tires were good except one on the Toad was saying 28.5 pounds, usually it is 32. I decided to do a walk around and when I checked the Toad the tire in question was totally flat. The TPMS still showed it reporting 28.5. If I would not have done the walk around I may have driven a while before noticing the tire was flat and destroyed it. Can anyone explain this? Has anyone else had this problem?
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Old 04-03-2012, 12:11 AM   #2
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That means always check, thank you a good lesson.
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Old 04-03-2012, 07:46 AM   #3
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Only thing I can think of is that a piece of dirt or debris from the inside of the tire blew into the sensor inlet and held the pressure at 28 psi.
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Old 04-03-2012, 09:05 AM   #4
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not sure I do not own one yet but don't some of the tpms have to wake up to start showing pressures and some work in the rest mode. a thought.
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Old 04-04-2012, 10:44 AM   #5
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I've had pressure pro for several years and have not experienced that problem.
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Old 04-04-2012, 11:47 AM   #6
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Quote:
Originally Posted by Ed ke6bnl View Post
not sure I do not own one yet but don't some of the tpms have to wake up to start showing pressures and some work in the rest mode. a thought.
I'm certainly not sure either but this is a good point. On some, unless you've wired it to be in the "always monitor" mode, it might have a 5 or 6 minute wake up period where it still reports the last known pressure.

Good luck

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Old 04-04-2012, 05:06 PM   #7
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There are several reasons a sensor might not report. However you did not tell us what TMPS system you have.. Pressure Pro, for example, when the tire drops below a pre-set percentage starts screaming for attention.. and the sensor when the tire goes flat goes into a "panic" mode that virtually guarantees it will be read. It is all but impossible to block a sensor in panic mode.

In normal mode sensors often do not get read due to data collisions and such.

But that should not happen with a totaly flat tire. At least not in a properly designed system.


Posibility 2

Sensor battery went dead while it was screaming, you were reading a neighbor's vehicle with the same ESN.
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Old 04-04-2012, 05:43 PM   #8
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When I remove a sensor with my TST 507 system, it beeps the monitor in about 2 seconds. I would think if it did have to "Wake up", it would alarm almost immediately.
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Old 04-04-2012, 05:47 PM   #9
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I think it normally updates every 10 minutes, unless there is a sudden loss of of pressure. If all else fails, read the instructions.
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Old 04-05-2012, 10:29 AM   #10
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The system is a Tire Minder. There was no other vehicles near and when we parked the night before the tire was ok and the monitor read 28.5. That is why I checked it but it looked OK and I decided to add air in the morning. No alarm went off while we sat there in the evening and still read 28.5 in the morning. There was a screw in it that we must have picked up just before parking.I will call the manufacturer and post their comments.
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Old 04-06-2012, 05:26 AM   #11
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Good thing it wasn't telling you there was 32 pounds in it or I'm guessing you would have driven off?

Lucky!
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Old 04-06-2012, 05:47 AM   #12
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I don't own the Tire Minder TPMS. I happen to choose the Doran Pressure Pro system to purchase. Whenever we stop for the night, I always unplug the master control from the 12 VDC socket. I don't want the damn thing going off in the middle of the night for whatever reason. Then the next morning, I turn on all of my gadgets, TPMS, GPS, SilverLeaf and my DVR - Monitor Screen for my trailer cameras. Once everything is powered up and OK, I ALWAYS do a final walk around to check everything including lights, tires, slides, awnings, etc.

I don't want any surprises when I get back on the road. This is my routine and I stick to it every time.

There may be a number of reasons why you got a false reading from the one sensor. I would find out quickly as to why otherwise what purpose is the system providing to you?

Having a TPMS on and working correctly for my tires is like having my seat belt fastened for myself. I never move the coach without having either working properly.

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Old 04-06-2012, 06:19 AM   #13
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Quote:
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Good thing it wasn't telling you there was 32 pounds in it or I'm guessing you would have driven off?

Lucky!
Get real... They're never that accurate.
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Old 04-06-2012, 06:50 AM   #14
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Quote:
Originally Posted by Dr4Film View Post
I don't own the Tire Minder TPMS. I happen to choose the Doran Pressure Pro system to purchase. Whenever we stop for the night, I always unplug the master control from the 12 VDC socket. I don't want the damn thing going off in the middle of the night for whatever reason. Then the next morning, I turn on all of my gadgets, TPMS, GPS, SilverLeaf and my DVR - Monitor Screen for my trailer cameras. Once everything is powered up and OK, I ALWAYS do a final walk around to check everything including lights, tires, slides, awnings, etc.

I don't want any surprises when I get back on the road. This is my routine and I stick to it every time.

There may be a number of reasons why you got a false reading from the one sensor. I would find out quickly as to why otherwise what purpose is the system providing to you?

Having a TPMS on and working correctly for my tires is like having my seat belt fastened for myself. I never move the coach without having either working properly.

Dr4Film ----- Richard
A major drop in the temperature will do it.

A good procedure, that's what I do.
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