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#1 (permalink) Old 01-19-2013, 08:09 PM
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TPMS Sensor Question

How many TPMS sensors can be registered in the computer?
Is it only 4 or more than that? Looking to hopefully have one in the full size spare as well so I can rotate all 5 wheels.
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#2 (permalink) Old 01-20-2013, 06:01 PM
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Anyone?
Bueller?
Bueller?
Bueller?
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#3 (permalink) Old 01-20-2013, 06:10 PM
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Re: TPMS Sensor Question

Do you really need them?. You can search here for the tpms canister mod. To where you don't need to mess with them
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#4 (permalink) Old 01-20-2013, 06:18 PM
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To tell you the truth mycurrent vehicle has them and I've gotten used to them.
We have severe temp drops a few times a winter and the TPMS notifies me when the pressure drops to unsafe levels. None of our gas stations have air anymore and I need to bust out the compressor to fill the tires + I don't like checking and filling tires @ -40 if I don't really have to.

Just wish the Tundra TPMS told you which tire was low like my current truck.
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#5 (permalink) Old 01-20-2013, 07:40 PM
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When it comes to TPMS I prefer the DDD solution. Delete, delete, delete!! Far too much trouble and expense in lieu of a simple tire pressure gauge and timely inspections.

Even better than the canister, the brother Socal57 has a simple zener diode based circuit that bypasses the onboard electronics.

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#6 (permalink) Old 01-20-2013, 08:13 PM
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I like them too. I have two sets of wheels with the OEM TPMS. When I change from one to the other I do need to reset the computer with the little button under the dash. So I know there can be eight of them and the computer handles them OK. One set is the steel wheels and the other is the Toyota aluminum wheels. They use two different models of TPMS. It is a long and slow process-read the manual. It takes me precisely one beer to get the job done while the truck and I are setting under the carport.
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#7 (permalink) Old 01-20-2013, 11:34 PM
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Good to know Dan.
Where I live I get a lot of punctures and most are slow leaks.
The TPMS system really helps especially when I'm way out in the middle of nowhere. Better to have a light come on than to have a blowout and end up in a ditch 200 miles from the nearest town.

When I go on vacation every fall there is one stretch of highway I drive (if you can call it that as it's actually a dirt road) that is just over 300 miles between towns. You don't want to get into trouble back in there as I rarely see more than 1/2 dozen cars during that part of the trip. The return trip is usually even quieter and the road is quite often snow and ice covered in eary October.
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#8 (permalink) Old 01-21-2013, 03:06 AM
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TPMS is way too slow to warn of blowouts. Besides, it would be best if you kept your eyes on the road when it happens.

Attention environmentalists, reduce emissions from this:
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#9 (permalink) Old 01-21-2013, 01:54 PM
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Not too slow to warn you of a leak though and driving on a low tire will likely cause a blowout.
Being able to see that your tire is low and being able to remedy that issue before catastrophic damage occurs is a good thing.
A nail hole can be fixed but a blowout can't and then there's the possible loss of control associated with a blowout.

Seen it before on the Alaska Hwy.
Returning home after my vacation in 6" of fresh snow there was a travel trailer (or what was left of it) in the ditch miles from nowhere. The trailer had a blowout and the driver lost control and the whole rig ended up in the ditch. The trailer looked like it had been shredded by a tornado, but it looks like the tow vehicle had survived and was able to drive away.

Granted, not the same as having a blowout on the tow vehicle, but if the trailer had an aftermarket TPMS system it very well may have been avoided all together.
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#10 (permalink) Old 01-21-2013, 04:21 PM
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The OP doesn't have to concern himself with the TPMS if he is rotating the 5 onboard tires. The 4 with TPMS will still be on the truck even if it is the spare.
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#11 (permalink) Old 01-21-2013, 05:03 PM
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True but I won't know if the one without the sensor is low.
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#12 (permalink) Old 01-21-2013, 05:24 PM
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Tire guage?
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#13 (permalink) Old 01-21-2013, 08:39 PM
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Unless its impossible to reach the stem without removing the spare tire, I check spare tire pressure on every oil change I do.
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#14 (permalink) Old 01-23-2013, 01:51 AM
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I think you can have no less than 4 or no more than 5 sensors registered at a time.

From this attachment it appears that you can change the pressure values if you have a Techstream set-up. I have a Techstream but haven't played with this section yet, but plan to the next time I have it plugged in. If you could change it to say 0 psi couldn't you just put the sensors in the glove box (i.e no pressure vessel)???
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File Type: pdf TPMS_Code_Input[1].pdf (1.00 MB, 9 views)


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#15 (permalink) Old 01-23-2013, 03:50 AM
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No, that doesn't work. Either use the pressure vessel or 4V simulator.

Attention environmentalists, reduce emissions from this:
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