TPS: valve caps and sensor registration
Thread Starter
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Joined: Nov 2004
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From: Oregon
TPS: valve caps and sensor registration
My TPS knowledge search continues:
Here is a cut and past from a tire business site ( http://www.tirebusiness.com/subscrib...&id=1118065369 )
Many of us are still trying to figure out a work around for swapping wheels with the tire pressure sensors. I just bought a new set of sensors for my track wheels. The sensors are made by Schrader ( http://www.schraderelectronics.com/i...cation_id=1044) in Ireland. I sent them email asking about the trigger frequency. Here are some specs about the sensors we have:
http://www.bartecusa.com/tpmstools/index.html
Sensor Technologies
Here is a cut and past from a tire business site ( http://www.tirebusiness.com/subscrib...&id=1118065369 )
"Tire sensors have changed components as the auto makers change their specification with the tire sensor manufacturer. It is important to note for future reference the make and model year of the vehicles to better address your questions.
Galvanic corrosion is the primary reason for all your difficulties with tire sensor valve caps and cores. The aluminum tire valve threaded area of the tire sensor can only use components made for this special application.
The use of non-nickel-plated cores and regular metal valve caps causes galvanic corrosion. The difficulty some tire dealers are experiencing in removing valve caps may be due to improper technique in handling the valve cap.
The real issue is that the valve cap is slippery and hard to remove as a result of oil, brake dust or other greasy contaminants. Tire technicians will then use pliers, which can bend the cap into the threads and seize it in place, making it difficult to remove."
Someone folks have replaced the stock valve caps or lost them in a tire store. It is probably a good idea to use the stock nickel alloy caps and the valve cores. When I did a wheels swap I didn't notice that two of my stock caps were missing until the next day. By the time I got back to the tire store they could only find one of the caps. At the time I didn't know about the importance of the stock valve cores, so now I am wondering what ended up in my wheels.Galvanic corrosion is the primary reason for all your difficulties with tire sensor valve caps and cores. The aluminum tire valve threaded area of the tire sensor can only use components made for this special application.
The use of non-nickel-plated cores and regular metal valve caps causes galvanic corrosion. The difficulty some tire dealers are experiencing in removing valve caps may be due to improper technique in handling the valve cap.
The real issue is that the valve cap is slippery and hard to remove as a result of oil, brake dust or other greasy contaminants. Tire technicians will then use pliers, which can bend the cap into the threads and seize it in place, making it difficult to remove."
Many of us are still trying to figure out a work around for swapping wheels with the tire pressure sensors. I just bought a new set of sensors for my track wheels. The sensors are made by Schrader ( http://www.schraderelectronics.com/i...cation_id=1044) in Ireland. I sent them email asking about the trigger frequency. Here are some specs about the sensors we have:
GEN2 features and specifications:
* At a weight of 34 grams, it is the lightest TPM sensor in the market
* Battery powered for long life; 10 years or 150,000 miles.
* Electronics are sealed and protected from moisture, dirt and survives temperature extremes (-40° C to 125° C).
* Silicon pressure sensor range 0 - 150 psi.
* Pressure measurements have 0.2 resolution and ±2% accuracy over operating temperature range. ¨True gauge pressure¨ or ¨temperature referenced¨ formats are available.
* Tire temperature data available
* RF communication link offers wireless installation.
* Transmission frequency of 315 MHz; 433.92 MHz and 868 MHz (Under development) to meet Worldwide RF legislative requirements.
* Each transmitter has a unique ID code that prevents vehicle ¨crosstalk.¨
* For ease of installation and service, each transmitter can send a signal on demand.
I also found a company that makes tire pressure sensor diagnostic tools. I am wondering if one of their "trigger" devices would work for us. I also noticed they listed 125kHz as the activation frequency? I sent them email asking for the tool model that would solve our wheel swap problem. I noticed that GM is one of their customers so they may not want to help us.* At a weight of 34 grams, it is the lightest TPM sensor in the market
* Battery powered for long life; 10 years or 150,000 miles.
* Electronics are sealed and protected from moisture, dirt and survives temperature extremes (-40° C to 125° C).
* Silicon pressure sensor range 0 - 150 psi.
* Pressure measurements have 0.2 resolution and ±2% accuracy over operating temperature range. ¨True gauge pressure¨ or ¨temperature referenced¨ formats are available.
* Tire temperature data available
* RF communication link offers wireless installation.
* Transmission frequency of 315 MHz; 433.92 MHz and 868 MHz (Under development) to meet Worldwide RF legislative requirements.
* Each transmitter has a unique ID code that prevents vehicle ¨crosstalk.¨
* For ease of installation and service, each transmitter can send a signal on demand.
http://www.bartecusa.com/tpmstools/index.html
Sensor Technologies
The company and its representatives are fully conversant with the following Tire Pressure Monitoring sensor technologies and regulations
* 125kHz activation
* Multiple frequency testing and reading (315MHz, 433MHz, 309MHz).
* Multiple modulations (ASK,FSK).
* Multiple communications protocols (Manchester, PWM,Bi-phase etc)
http://www.bartecusa.com/tpmsensors/index.html
* 125kHz activation
* Multiple frequency testing and reading (315MHz, 433MHz, 309MHz).
* Multiple modulations (ASK,FSK).
* Multiple communications protocols (Manchester, PWM,Bi-phase etc)
Team Owner
Joined: Jun 2001
Posts: 26,714
Likes: 344
From: Houston, TX
Great research 
Please keep us updated with your findings. I think the most important thing the forum members want to know is if we can get an inexpensive tool to reset them (magnets were a great too for C5's!).
The thought of taking a couple of hours of time, dealing with dealers, and likely having to pay just to have them reset is not very appealing, especially when it's a major step backwards from the C5's.
THANKS GM for finding a way to make our "buying experience" worse, rather than better! Do you really think we look forward to trips to our dealer?
Please keep us updated with your findings. I think the most important thing the forum members want to know is if we can get an inexpensive tool to reset them (magnets were a great too for C5's!).
The thought of taking a couple of hours of time, dealing with dealers, and likely having to pay just to have them reset is not very appealing, especially when it's a major step backwards from the C5's.
THANKS GM for finding a way to make our "buying experience" worse, rather than better! Do you really think we look forward to trips to our dealer?
Thread Starter
Pro
Joined: Nov 2004
Posts: 608
Likes: 1
From: Oregon
Update + edit
I should have some more info on a basic TPS activation trigger tomorrow. Bartec responded to my email and they appear to have the technology. I will post an update after I talk to the area sales rep tomorrow.
Found more info on the Bartec device:
http://www.rtpms.com/dxrtrans.html
Found more info on the Bartec device:
http://www.rtpms.com/dxrtrans.html
Last edited by jmess; Aug 2, 2005 at 11:32 PM. Reason: more info
Thread Starter
Pro
Joined: Nov 2004
Posts: 608
Likes: 1
From: Oregon
We have a solution to the TPS problem!!
Good news.
I talked to Bartec and they have a basic activation tool, Model DXR+, that is compatible with our TPS and will allow us to register new/diff TPS with the TPM. The cost shipped is $225.00. I talked to the sales rep and if 5 or more people wanted to buy a DXR+ we could get 25-30 off. The DXR+ is designed for the aftermarket user.
http://www.bartecusa.com/tpmstools/dxr.html
So I will create another post on the general forum on a group buy.
I talked to Bartec and they have a basic activation tool, Model DXR+, that is compatible with our TPS and will allow us to register new/diff TPS with the TPM. The cost shipped is $225.00. I talked to the sales rep and if 5 or more people wanted to buy a DXR+ we could get 25-30 off. The DXR+ is designed for the aftermarket user.
http://www.bartecusa.com/tpmstools/dxr.html
So I will create another post on the general forum on a group buy.
