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Discussion Starter #1
As many of you know, my truck came with steel wheels, so I was anxiously awaiting the day to have my alloys put on. I new the '06 Tacoma came with TPMS sensors, but I had no idea there were two models; one for steel wheels (40*) and one for alloy (20*).

Well, the alloy wheels are on, so now I have the TPMS sensor light shining on my dash......but not any more. I created a PVC pipe small enough to put behind the seat, under the truck inside the frame, or pretty much anywhere. Pictures at bottom of post.

Total expense: $12.00.

Here's what I did:

Grocery List:
  • 3" PVC SCH.40 Pipe (about 4 to 4 1/2" in length)
  • Two (2) 3" PVC SCH.40 End Caps
  • One (1) Can Heavy Duty PVC Cement (glue) (green label - to contain pressure in tube)
  • One (1) Small Valve Stem (yes, like for a tire)
  • Optional: Bubble Wrap (to keep the sensors for clanging together)
Tools Needed:
  • Fine Sand Paper
  • Drill
  • Drill Bit (size can vary depending on Valve Stem width)
  • Jigsaw
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Steps:
  1. Take the jigsaw and cut the 3" pipe down to about 4 to 4 1/2" in length. It can be longer if you would like.
  2. Sand down the ends where you cut the pipe so they are smooth to allow for a good bond to the end caps.
  3. Take the cement (glue) applicator and rub it around one end of the pipe and the inside wall of the end cap.
  4. Quickly put the end cap on, pushing it as far as you can onto the pipe. The cement sets quickly, so work fast.
While the cement sets, get the sensors ready to be inserted into the pipe.
  1. Cut the bubble wrap into strips long enough and wide enough to wrap around each sensor like a diaper. (around the plastic part)
  2. Wrap the bubble wrap around the plastic part, then tape it so that it stays around the sensor.
  3. Repeat this for each sensor. Set them to the side.
Now let's do some drillin'!
  1. Take the valve stem, and hold it up to a drill bit to find the right size. What you want is a bit that will allow the valve stem to be pushed through the end cap from the inside out, but small enough to stop it from passing all the way through. (You may want it a little snug when passing through so it will be a little tight on the valve stem.)
  2. Drill the hole in the end cap.
  3. Take the sand paper and smooth down the inside and outside of the end cap where you drilled the hole. On my end caps, there was writing. I sanded that down also to give a smooth surface. (see picture)
  4. Push the valve stem through from the inside out with the smaller end facing up, away from the end cap.
  5. Once in, make sure you are unable to pull it through with a reasonable amount of force.
Now back to the pipe.
  1. Slide each sensor into the pipe with the stem pointing up. Once all four are in, you may have to jiggle it to get them to settle better.
  2. Optional: If you would like, you may put extra bubble wrap at the end to make them fit snug.
  3. Take the cement (glue) applicator and rub it around the end of the pipe and the inside wall of the last end cap.
  4. Quickly put the end cap on, pushing it as far as you can onto the pipe. The cement sets quickly, so work fast.
Your TPMS Sensor pressure pipe is now complete.
  1. ATTENTION!!! Allow the cement (glue) to set and dry over night before filling with air. ATTENTION!!!
  2. Fill the pipe with air. It should take one to three seconds to reach +-30 psi.
  3. Check the pressure with a tire gage. You should be able to "trick" the system with anywhere from 25 to 30 psi.
Congratulations, you're finished!!!

Warning: I am not responsible for any damage done to the sensors, your tools, your hands, or your brain (glue smell). I performed this modification for my own enjoyment and sanity.

Here are some pictures of the completed pipe. Enjoy!















 

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clever...
I have an 05 so it's a non-issue, but wouldn't it have been easier to just cut the TPMS light wire?
:confused:
 

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As long as you are not in a situation where you need to pass through any security check points you should be fine :eek:
 

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Discussion Starter #5
As long as you are not in a situation where you need to pass through any security check points you should be fine :eek:
No, that should never be a problem. If so, all I have to do is explain what it is, then leak the air out and show that the light comes back on on the dash. But then again, I still may end up in jail. :confused:
 

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I was wondering if this would work on my 07 Tacoma. Take out the sensors and toss them in the glove box. Reset the system with the reset switch. Would this fool the system into thinking that atmospheric pressure was the correct operating pressure? Has anyone tried this?

Jeff
 

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I was wondering if this would work on my 07 Tacoma. Take out the sensors and toss them in the glove box. Reset the system with the reset switch. Would this fool the system into thinking that atmospheric pressure was the correct operating pressure? Has anyone tried this?

Jeff
There has been a ton of debate on this subject, but from what I've read and researched, the option you are asking about will not work. The PVC pipe solution seems to be very common, as well as the use of a small wheel-barrow type tire that you can put all the sensors inside and then air up to the proper pressure. My B-I-L is a Toyo mechanic, and I was able to get the sensors for my new FJ alloy wheels for $25 each, so I just went ahead and spent the money for a second set of sensors. I think the idea of the TPMS is great, but Toyota should have developed a universal type sensor that would have worked on any/all wheels.
 

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Discussion Starter #8
I was wondering if this would work on my 07 Tacoma. Take out the sensors and toss them in the glove box. Reset the system with the reset switch. Would this fool the system into thinking that atmospheric pressure was the correct operating pressure? Has anyone tried this?

Jeff
No, that will not work. i even tried pressing on the metal piece on the back of the sensor while pressing the reset button....no luck.

i heard that by 2008, TPMS sensors are going to be mandatory for all new vehicles sold in the US. Isn't that just great!!!! if they would go with a "one size fits all" type, this wouldn't be a bad thing, but i don't think they will.
 

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I hate to be the bearer of bad news but you may have created a grenade that could do some serious damage if you are not careful. Plumbing codes do not allow for an "air test" on pvc piping due to the fact that when PVC is under high pressures it can explode and fragment causing projectile shrapnel. I know you are only running 30 psi in it. I just want to make you aware of this.

I heard that when you disconnect the negative terminal on the battery (not using the reset switch) the system resets itself to the current pressure in the tire that the sensor reads when you reconnect it. I wonder if the system will just use the atmospheric pressure as the base point as willijf1 talked about. Has anyone tried doing this?
 

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I hate to be the bearer of bad news but you may have created a grenade that could do some serious damage if you are not careful. Plumbing codes do not allow for an "air test" on pvc piping due to the fact that when PVC is under high pressures it can explode and fragment causing projectile shrapnel. I know you are only running 30 psi in it. I just want to make you aware of this.
Good point. Something to definitely consider on a 100*F day!! Would it be possible to install a relief/check valve?
 

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Discussion Starter #13
Suit yourself. This mod woked for me and my needs. Based on the glue specs and information I have read on PVC pipe, I do not feel this will cause any problems. I have plans from moving it from behind the back seat to under the truck (strapped to the frame).
 
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