Defeating the TPM
Thread Starter
Pro
Joined: Dec 2003
Posts: 654
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From: chandler az
I'd go for the startup and shutdown part, but not contiuously transmitting.
Melting Slicks
Joined: Feb 2007
Posts: 3,266
Likes: 8
From: Indian Rocks Beach FL
St. Jude Donor '08-'09-'10
The TPM system receives the information to monitor the tire pressure in all four wheels through each of the sensors. The vehicle must be traveling 16-24 km/h (10-15 mph) before the sensors will transmit the tire pressure information. At this speed, the sensor roll switches activate in order to transmit each unique location identification code to the receiver. The TPM sensors also send the tire pressure information to the receiver within the range of 0-427 kPa (0-60 psi). The receiver interprets this data and sends a message on the serial data line to the IPC. The IPC then displays the tire pressure information for each tire. Holding a magnet over the valve stem will manually override the sensor for programming or testing purposes. When the vehicle has been stationary for more than 1 minute, the sensors enter a power down or sleep mode and stop transmitting tire pressure information. This minimizes the battery consumption rate.
And:
When the vehicle is stationary the sensors internal roll switches are open, which puts the sensors into stationary mode. In this mode the sensors transmit once every 60 minutes. As vehicle speed increases, centrifugal force closes the sensors internal roll switches, which puts the sensors to go into drive mode. In this mode the sensors transmit once every 60 seconds.
End quote
Last edited by Mark C5; Dec 9, 2009 at 12:02 PM.
Thread Starter
Pro
Joined: Dec 2003
Posts: 654
Likes: 1
From: chandler az
In any case, this still doesn't help me out unless I want to change out the BCM. I was kind of hoping for something easy and cheap. Right now the cheapest solution is to pull them all out and pressurize them, but even then I'm not sure that would work right with sensing that it's moving. I know somebody else did that with a go kart tire and left the tire in the trunk so I guess the movement part isn't all that critical.
Melting Slicks
Joined: Feb 2007
Posts: 3,266
Likes: 8
From: Indian Rocks Beach FL
St. Jude Donor '08-'09-'10
In any case, this still doesn't help me out unless I want to change out the BCM. I was kind of hoping for something easy and cheap. Right now the cheapest solution is to pull them all out and pressurize them, but even then I'm not sure that would work right with sensing that it's moving. I know somebody else did that with a go kart tire and left the tire in the trunk so I guess the movement part isn't all that critical.
Bottom line is there is no easy way to eliminate the TPMS that I know of or have read of.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
OK. Let’s try this. If you really want to rid your self of sensors in the wheels...build your own pressure chamber.
Go to Home Depot or Lowes and pick up some PVC piping and caps. The piping would need to be big enough to install 4 TPM Sensors in. Glue the cap on to one end of the pipe, install THREE sensors in the pipe. Make sure you enclose some course sponge packing to prevent then from rattling around in the pipe. The other cap, drill a hole in the center big enough for the forth sensor stem to go thru tight. Use a very amount of RTV to help seal the O ring to the cap. Be careful NOT to seal the small hole that the air pressure enters and exits on the stem. Secure the sensor nut to the outside of the cap. Again use some RTV below the sensor nut.
Once the RTV sets up, put 25-40 PSI in the chamber. That should allow the TPM system to satisfy the pressure requirement. I can NOT tell you if not activating the roll switches when the car is in motion will cause an issue.
NOTE!!! Please make sure that you stencil the container with what is inside and that it contains PRESSURE!
If it works, pop it in one of the small compartments in the rear and call it a day.
BC
Go to Home Depot or Lowes and pick up some PVC piping and caps. The piping would need to be big enough to install 4 TPM Sensors in. Glue the cap on to one end of the pipe, install THREE sensors in the pipe. Make sure you enclose some course sponge packing to prevent then from rattling around in the pipe. The other cap, drill a hole in the center big enough for the forth sensor stem to go thru tight. Use a very amount of RTV to help seal the O ring to the cap. Be careful NOT to seal the small hole that the air pressure enters and exits on the stem. Secure the sensor nut to the outside of the cap. Again use some RTV below the sensor nut.
Once the RTV sets up, put 25-40 PSI in the chamber. That should allow the TPM system to satisfy the pressure requirement. I can NOT tell you if not activating the roll switches when the car is in motion will cause an issue.
NOTE!!! Please make sure that you stencil the container with what is inside and that it contains PRESSURE!
If it works, pop it in one of the small compartments in the rear and call it a day.
BC
Pro
Joined: Aug 2007
Posts: 599
Likes: 39
From: citrus heights ca
anyone wanting to get rid of their sensors,take a look at my post here:
http://forums.corvetteforum.com/whee...post1572629503
http://forums.corvetteforum.com/whee...post1572629503
