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Discussion Starter #1

Mods, This would be a good one to Sticky in this section, because if we change wheels and tires, we have to deal with this and it cost nothing.

All of us that own toyotas get sick of the TPMS issues when we don't put the sensors in our aftermarket wheels. People have come up with some interesting ways to put sensors in pressurized canisters, put them all in the spare tire and what not.

Here is the proper way to eliminate the TPMS light on your late model FJ Cruiser, Tacoma, Tundra, Sequoia, and Land Cruiser. Also, it is fully reversible when the time comes to sell the truck or put the factory wheels back on.

I have performed this in the past on my 2007 FJ, 2008 Tacoma, and now my 2007 Tundra.

Start by removing the Bezel around the Gauge Cluster. The Tacoma and FJ are much easier than the Tundra, so I am going to show you how on the Tundra.



Start at the lower left hand corner and start prying out the bezel with your hands, there is no reason to use tools here for this.



Once you get it started pull it out far enough to reach through the gauge cluster openings to pull and pop the clips evenly with out applying too much force.



Once loose undo the electrical connections that are attached to the bezel, on the Tundra there are quite a few of them.




Then go ahead and undo the large black wire that goes up and over the top of the Bezel openings. Remove it from the guides and let it fall behind the bezel, Also here you are going to have to remove or unclip the vinyl flap that hides the steering colum when fully extended. Stick your fingers through the Bezel and reach down, there are 4 clips holding it on, just pinch them together and they will release away from the bezel. If you have big hands, this can be hard to do.



Once the bezel is removed, there are 4 screws securing the gauge cluster, remove them and keep them in a safe place.




Once removed you will see the wire harness and clip, undo the harness and muscle out the black clip to remove the gauge Cluster.





Now that the cluster is out, set it on a clean bench, if you are worried about scratching it, work on a soft bath towel.



Find the cover clips and very carefully push them out and remove the clear plastic cover.





Next remove the black bezel surround by the same matter.







Now you have your naked bezel, take note of where the instrument needles are, remove the lower right needle by pulling up on it, you may need to leverage your fingers on the vinyl backing to get enough torque to pull it up. Once it slides off, pull the vinyl backing up to expose the lights underneath.







Take a 1" piece of black electrical tape and put it over the small square under the vinyl backing to "block the light" from the TPMS sensor warning lamp. The tape is right at the end of my finger in place under the vinyl backing.





Push the vinyl backing flat again, reinstall the Gauge needle that you removed. (important note, you may have disrupted the location of this gauge. put the needle back on half way, rotate it till you feel tension going to the left, this is resetting it to zero or off. Pull the needle back off and put it back on so that the setting is correct and consistent to when you took it off.)

Put everything back together and enjoy no longer having the stupid TPMS Light warning on your dash!
 

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Very nice. I think I would just put a piece of black tape over the light if was bothering me.
 

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Holy frickin' long OP batmanWouldn't it have been easier to say "pull the cluster and install tape over the TPMS light port?"

Good info though.
 

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The problem with this fix is that the computer still thinks the light is on. I made a canister to keep the TPMS in, and I have found that my gas mileage increased with the light off. I have checked mileage with the light on and off several times, and my tests have always yielded the same results.
 

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The problem with this fix is that the computer still thinks the light is on. I made a canister to keep the TPMS in, and I have found that my gas mileage increased with the light off. I have checked mileage with the light on and off several times, and my tests have always yielded the same results.
Why do you think this is? is the ECU compensating somehow because it thinks the tires are flat?
 

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Hmmm. Novel idea, but wouldn't it be easier to just cut out a small piece of tape and stick it on the outside of the glass covering the cluster? Not as clean, but a 5 second job.

EDIT: Oh, I see Al suggested that already. I have hands the size of picnic hams, no doubt I'd break something, but if nothing else, this is well worth the sticky to show how to take the instrument cluster out.
 

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Discussion Starter #9
The problem with this fix is that the computer still thinks the light is on. I made a canister to keep the TPMS in, and I have found that my gas mileage increased with the light off. I have checked mileage with the light on and off several times, and my tests have always yielded the same results.

I called my Toyota Tech on this one, The TPMS sensor system is completely separate from any of the engine ECU components. It has its own sending box and ecu that turns the warning light on and off. It is "impossible" for the TPMS sensor system to have any effect on the engine function.

I have to believe him because I have done this in 3 Toyota trucks and it never yielded a change in MPG and I track it in a book every fill up.
 

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Hmmm. Novel idea, but wouldn't it be easier to just cut out a small piece of tape and stick it on the outside of the glass covering the cluster? Not as clean, but a 5 second job.

EDIT: Oh, I see Al suggested that already. I have hands the size of picnic hams, no doubt I'd break something, but if nothing else, this is well worth the sticky to show how to take the instrument cluster out.
Because that is not a fix, its a terrible piece of black tape sitting on your dash that would bug the hell out of you. Maybe im just more anal than most, but this is the way to make the light go away and not have to think about it any more.
 

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Why do you think this is? is the ECU compensating somehow because it thinks the tires are flat?
I have tested Tundra codes for Linear Logic (the manufacturers of Scangauge) and from my work with them I know that the computer receives input from the TPMS sensors, even though it is another module that tells the light to come on. My truck came with 40 degree sensors and I was not able to use them in the TRD rims from I purchased off EBay, so I was driving around with the light on. I decided to make a pressure vessel to keep the sensors in, just because the light annoyed me, and after I did I noticed an increase in MPG. I tested this several times by letting the pressure out of the vessel, and when I did my MPG dropped. I am only talking about a small change. In the 3 tests I did, the increase from the previous tank with the light on was 6, 5, and 7% respectively. I am convinced there is an effect on mileage with the light on.
 

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I called my Toyota Tech on this one, The TPMS sensor system is completely separate from any of the engine ECU components. It has its own sending box and ecu that turns the warning light on and off. It is "impossible" for the TPMS sensor system to have any effect on the engine function.

I have to believe him because I have done this in 3 Toyota trucks and it never yielded a change in MPG and I track it in a book every fill up.
True, the TPMS sensors have a separate module, but the main computer reads this information as well. I have tested codes for Linear Logic that have to do with information from the TPMS sensors, and these come from the main computer.

I understand that you have done this on 3 trucks and it has never changed the MPG. I would not expect a piece of tape to help MPG. I have only done my fix on 1 truck, mine, but I have tested it 3 times and noticed gains each time.
 

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Tony have you tried pulling the tpms module from under the dash?
No, I have not tried that, and I don't think that will help. I checked back through my correspondence with James De Long of Linear Logic on this subject and this is what he said:

"However my thinking is that since some OBDII check engine codes relate specifically to low tire pressure then the OBDII system must be getting that information relayed somehow. If there is a path from the TPMS module to OBDII then that leaves hope there's a path to access information through OBDII to the TPMS. The tricky part is finding out how to dig through the code to it."

As of now, there are still no codes to read this on Scangauge.
 

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There definitely is a path to tpms through the obdII port. That's how the dealer resets it. And aftermarket companies too.

But what I was talking about is different.
Since your tpms are in a handy dandy pipe, you could pull the under dash module and then remove your canister to the house. Then see if the light goes away. You'd be a hero to many members
 

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There definitely is a path to tpms through the obdII port. That's how the dealer resets it. And aftermarket companies too.

But what I was talking about is different.
Since your tpms are in a handy dandy pipe, you could pull the under dash module and then remove your canister to the house. Then see if the light goes away. You'd be a hero to many members
I could just let the air out of it like I do when I check the mileage with the light on. I might try that the next time my dash is apart, which will be soon to run the wires for my sub. Could not anyone with the light on try this?
 

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Anyone could. but better if someone who had the light off tried it. But if anyone wants to try this and maybe be a hero, let us know. I'm still running my sensors so I won't be able to do this.
 

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Discussion Starter #19
I knew where the Module was in the FJC- that fix was to cut a wire and make it go away. Where is the module in the Tundra? Ill pull it out of there to see what the difference is!
 
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