Myth Buster. Interesting TPM article
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Burning Brakes
Joined: Apr 2005
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From: Bear Delaware
Myth Buster. Interesting TPM article
Ran across this interesting article on "Tire Pressure Monitoring" systems. Here is an piece of it and the link.http://www.findarticles.com/p/articl..._n6075435/pg_4
[QUOTE]On GM's application of this new TPM concept, there is a wireless RF sensor/transmitter unit built into the valve stem of each wheel. It is inserted from the inside of the wheel and retained by a nut torqued to 35 lb.-in. and sealed with a grommet. The pressure sensors each weigh about 1 ounce (28 grams) and will most likely be noticed during wheel balancing. A 3V lithium battery with 10-year design life powers the sensor, but the sensors do not operate continuously. They transmit a pressure signal only once each hour when the vehicle is parked, and they do not operate at all when the vehicle moves below 20 mph. This schedule preserves battery power. The sensors' signal is received by the keyless entry system's radio receiver, which sends tire pressure information to the Body Control Module (BCM) for display on the Driver Information Center (DIC). A warning is sounded automatically if the pressure falls below 24 psi or rises above 39 psi.[UOTE]
[QUOTE]On GM's application of this new TPM concept, there is a wireless RF sensor/transmitter unit built into the valve stem of each wheel. It is inserted from the inside of the wheel and retained by a nut torqued to 35 lb.-in. and sealed with a grommet. The pressure sensors each weigh about 1 ounce (28 grams) and will most likely be noticed during wheel balancing. A 3V lithium battery with 10-year design life powers the sensor, but the sensors do not operate continuously. They transmit a pressure signal only once each hour when the vehicle is parked, and they do not operate at all when the vehicle moves below 20 mph. This schedule preserves battery power. The sensors' signal is received by the keyless entry system's radio receiver, which sends tire pressure information to the Body Control Module (BCM) for display on the Driver Information Center (DIC). A warning is sounded automatically if the pressure falls below 24 psi or rises above 39 psi.[UOTE]
Last edited by MTurnbo; Aug 31, 2005 at 04:40 PM.
Team Owner
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From: S.W. Ohio. . . . . . NRA Life Member
link doesn't work for me.
But from what you've posted; this info has been well known (at least here it has). Since I can't link to the complete article, what specific "myth" does this article clear up?
But from what you've posted; this info has been well known (at least here it has). Since I can't link to the complete article, what specific "myth" does this article clear up?
Melting Slicks
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From: Lino Lakes, MN _________________________ I Figured out how to do this!
St. Jude Donor '04-'05-'06
Instructor
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From: panhandle Florida
Originally Posted by 14U2ENV
On GM vehicles that leave the factory with keyless entry but without TPM sensors inside the wheels, the TPM function is simply not turned on. If wireless TPM sensors are later installed on the wheels, the TPM receiver and the tire pressure display on the DIC can both be activated with the Tech 2 scan tool. The following Tech 2 menu procedure, as described in the GM service update, will activate the TPM receiver:
If they can turn them on after they leave the factory (with the Tech 2 scan tool) can they turn them off with the Tech 2 scan tool. I'm pretty new to the 'vette community but one of my initial impressions is that the whole run-flat capability (tires and sensors) can be one big PITA. I'm definitely going to non-run-flats when the time comes to buy new tires. If the sensors start acting up, it might be a lot less painful to just tuen them off (if in-fact possible)
Burning Brakes
Joined: Aug 2000
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From: Morganton, NC, USA
Originally Posted by javamon
Interesting... here's a partial quoute from the referenced link:
On GM vehicles that leave the factory with keyless entry but without TPM sensors inside the wheels, the TPM function is simply not turned on. If wireless TPM sensors are later installed on the wheels, the TPM receiver and the tire pressure display on the DIC can both be activated with the Tech 2 scan tool. The following Tech 2 menu procedure, as described in the GM service update, will activate the TPM receiver:
If they can turn them on after they leave the factory (with the Tech 2 scan tool) can they turn them off with the Tech 2 scan tool. I'm pretty new to the 'vette community but one of my initial impressions is that the whole run-flat capability (tires and sensors) can be one big PITA. I'm definitely going to non-run-flats when the time comes to buy new tires. If the sensors start acting up, it might be a lot less painful to just tuen them off (if in-fact possible)
On GM vehicles that leave the factory with keyless entry but without TPM sensors inside the wheels, the TPM function is simply not turned on. If wireless TPM sensors are later installed on the wheels, the TPM receiver and the tire pressure display on the DIC can both be activated with the Tech 2 scan tool. The following Tech 2 menu procedure, as described in the GM service update, will activate the TPM receiver:
If they can turn them on after they leave the factory (with the Tech 2 scan tool) can they turn them off with the Tech 2 scan tool. I'm pretty new to the 'vette community but one of my initial impressions is that the whole run-flat capability (tires and sensors) can be one big PITA. I'm definitely going to non-run-flats when the time comes to buy new tires. If the sensors start acting up, it might be a lot less painful to just tuen them off (if in-fact possible)
Instructor
Joined: Jun 2005
Posts: 110
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From: panhandle Florida
Originally Posted by 2kbluestreak
I've not seen too many complaints about the C5 Tire Pressure Sensors. I think they did not put them on the Z06 because its tires had steel belts that blocked the signal. I like the idea of the TPM's with non-runflats as they can give you an early warning of a slow leak. All my experience with nails and flats has been that they are slow leaks. Getting an advanced warning lets you fill up with air to allow you to get home or drive to a tire store to get it patched.
Melting Slicks
Joined: Nov 2001
Posts: 3,088
Likes: 1
From: NC
Some more info on TPM.
TPM's are really nothing new to tire monitoring.
They have been used on aircraft forever and more expensive cars
as well. The C5 designers used them because the car was designed
not to have a spare tire. Therefore, they went with run flats.
(Well actually it was, but final decisions went with RF.)
Well with RF tires, a driver would not necessarily know if and when
they got a flat or were in a low inflation situation.
It's a safety issue and not merely "bells & whistles."
A ten year lifespan is pretty good and from what we've seen so far,
it holds up pretty well.
Also, the Z06 was designed without RF for weight savings and
better tire performance. So a TPM was not needed but a tire patch
kit and inflator was.
Many cars now come with TPMs as does my Mazda3.
Anything which provides a driver with information is a good thing.
TPM's are really nothing new to tire monitoring.
They have been used on aircraft forever and more expensive cars
as well. The C5 designers used them because the car was designed
not to have a spare tire. Therefore, they went with run flats.
(Well actually it was, but final decisions went with RF.)
Well with RF tires, a driver would not necessarily know if and when
they got a flat or were in a low inflation situation.
It's a safety issue and not merely "bells & whistles."
A ten year lifespan is pretty good and from what we've seen so far,
it holds up pretty well.
Also, the Z06 was designed without RF for weight savings and
better tire performance. So a TPM was not needed but a tire patch
kit and inflator was.
Many cars now come with TPMs as does my Mazda3.
Anything which provides a driver with information is a good thing.
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Thread Starter
Burning Brakes
Joined: Apr 2005
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From: Bear Delaware
Originally Posted by Mike Mercury
link doesn't work for me.
But from what you've posted; this info has been well known (at least here it has). Since I can't link to the complete article, what specific "myth" does this article clear up?
But from what you've posted; this info has been well known (at least here it has). Since I can't link to the complete article, what specific "myth" does this article clear up?
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
Originally Posted by MTurnbo
It was just a title. But I've heard several variations on how long the batteries last and on how it operates to save battery power so it was nice to clear these things up as well as learning some new things about the TPM system.
On GM vehicles that leave the factory with keyless entry but without TPM sensors inside the wheels, the TPM function is simply not turned on. If wireless TPM sensors are later installed on the wheels, the TPM receiver and the tire pressure display on the DIC can both be activated with the Tech 2 scan tool. The following Tech 2 menu procedure, as described in the GM service update, will activate the TPM receiver:
) with a GM Tech Tool 2 can turn this on and off at will.
