Hmm, buy tires/wheels with no TPMS, and check pressure light doesn't come on!
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lilsid112
New member
I remember this popping up on clublexus.com. If your wheels are stored in the garage and park your 4runner in there every night you wont get a warning. Im not sure how our system works but you can test this by letting some air out of your stock wheel and see if it triggers your warning light.
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op2:Interesting. I definitely thought about that. Wheels are in the garage but I was away from the house all day. No light. Unless the system does some kind of initial pressure check (with stock wheels nearby) and if no loss of PSI, light stays off?
If so, that is not how I thought these systems work...will report back.
If so, that is not how I thought these systems work...will report back.
Katahdin
New member
I think that is how it works, but the light does come on eventually. I put a new set of wheels and tires on my truck but I still have the originals in my garage and it connects to the TPMS whenever I start it at my house. The low pressure alarm may be instantaneous but it takes a while for the TPMS communications alarm (i.e. when it looses the connection to the sensors) to come on. I haven't bothered to figure out if it's time based or mileage based but, based on my drive to work, it's about 15 miles or 20 minutes.
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Antman
Elite Member
I purchased new sensors with my new wheels (I'll sell the old wheels with the original sensors).
The new sensors need to be initialized (by computer)before they can communicate with the TPMS system, so effectively it's like they aren't there until that happens.
My dash light didn't come on for 2 days driving back and forth to work. After it came on I had them initialized and all was OK.
You are driving on borrowed TPMS warning time!
The new sensors need to be initialized (by computer)before they can communicate with the TPMS system, so effectively it's like they aren't there until that happens.
My dash light didn't come on for 2 days driving back and forth to work. After it came on I had them initialized and all was OK.
You are driving on borrowed TPMS warning time!
Antman
Elite Member
The Tire Center Manager at my work is also my neighbor/good friend (I used to date his Ex-Wife too, LOL).
Anyway- he hooked up his little computer to my OBD port and in 2 minutes it was done.
Dealer wanted $100 bucks BTW...
1engineer
Moderator
People like Antman will help you a lot if you stick around! Welcome here and take pics.
PGRunner
New member
Thanks!
westwind77
New member
I swapped my tires, and TPMS as well, but before that....I got about 6 flats, arg! The TPMS is very fast to activate! I picked up a huge rusty bolts a few hundred yards from my street, before I could turn the TPMS was already on. After a few minutes in the driveway it was 100% flat. Other times it was a slower leak, but as soon as it hit the set point the warning went off.
kenski
New member
That ... and date your ex-wives.
philsey
New member
The light came on on 2 different occasions on my wife's CRV, and the tire was 4 lbs low each time. Slow leak due to a screw in tire. She, of course, had no idea what "that little light that looks like a flat tire" was. But she makes killer enchiladas.
eddiebx
New member
I think it's ~26psi? harper7 mentioned that in this thread below
http://www.toyota-4runner.org/5th-g...re-dealer-confiruation-update.html#post830924
///AIRDAM
New member
its actually 10% above or below whatever the stock pressure is set at. so if the sensor is programmed for 32psi, then the light will come on when the tire gets 10% less than 32psi, meaning
32 x 10% = 3.2
32 - 3.2 = 28.8
also, if you over fill one tire, you can fill it up to 3psi too high and the light wont come on. but if you fill it up too much, it will come on
32 x 10% = 3.2
32 + 3.2 = 35.2
so if you over fill the tires, past 35.2 then the light will also come on.
you can set the base pressure to something different than 32. on my tires, i typically always run lower pressure than required on my vehicles. i run whatever pressure makes the tire tread wear evenly flat. on my truck, i run as low as 22psi in the rear tires, and 24 in the front tires. which would make the dummy light come on the dash. so i reset the tire sensors to use my 24/22 as the base set pressure. so now,
24 x 10% - 2.4
24 - 2.4 = 21.6
so the way they are set now, if i did have a leak, when i got down to 21ish psi, the light comes on. you can reset the tire pressure the computer uses as your base pressure. so if you run a load range E tire, and you decide to run 40psi in it, you can set the base pressure for 40psi so the computer will then pick up and recognize 40psi as your norm, and come on if you are too low or high from there. if you will read in your owners manual, it states all of this, and how to reprogram your tire sensors to recognize a different base pressure. dont any of you guys read your owners manual???
and to the original poster, you are likely just parking close to your OE tires, and when you vehicle runs thru its checks, it sees the sensors, and your commute is too short for them to realize you are away from your OE tires. just as posted you are on borrowed time. the first trip you are gone for a while away from your home and OE wheels, your light will eventually come on. even if you buy a brand new set of sensors and install them on your vehicle, you will have to take them to the dealer and let the dealer program them. the dealer has to program the signal from each tire sensor to your computer so your computer will recognize each sensor. the sensors have numbers on them, so before you install them at a tire shop, write down all the numbers on the sensors. this saves the dealer time and you money. the dealer has a computer that will recognize each sensor after installed in a tire, but it typically takes a few minutes for it to pick up the serial codes from each sensor. its alot faster if you already have all the info and can hand it to the tech rather than having the computer to try to figure it all out. may save you a few bucks.
32 x 10% = 3.2
32 - 3.2 = 28.8
also, if you over fill one tire, you can fill it up to 3psi too high and the light wont come on. but if you fill it up too much, it will come on
32 x 10% = 3.2
32 + 3.2 = 35.2
so if you over fill the tires, past 35.2 then the light will also come on.
you can set the base pressure to something different than 32. on my tires, i typically always run lower pressure than required on my vehicles. i run whatever pressure makes the tire tread wear evenly flat. on my truck, i run as low as 22psi in the rear tires, and 24 in the front tires. which would make the dummy light come on the dash. so i reset the tire sensors to use my 24/22 as the base set pressure. so now,
24 x 10% - 2.4
24 - 2.4 = 21.6
so the way they are set now, if i did have a leak, when i got down to 21ish psi, the light comes on. you can reset the tire pressure the computer uses as your base pressure. so if you run a load range E tire, and you decide to run 40psi in it, you can set the base pressure for 40psi so the computer will then pick up and recognize 40psi as your norm, and come on if you are too low or high from there. if you will read in your owners manual, it states all of this, and how to reprogram your tire sensors to recognize a different base pressure. dont any of you guys read your owners manual???
and to the original poster, you are likely just parking close to your OE tires, and when you vehicle runs thru its checks, it sees the sensors, and your commute is too short for them to realize you are away from your OE tires. just as posted you are on borrowed time. the first trip you are gone for a while away from your home and OE wheels, your light will eventually come on. even if you buy a brand new set of sensors and install them on your vehicle, you will have to take them to the dealer and let the dealer program them. the dealer has to program the signal from each tire sensor to your computer so your computer will recognize each sensor. the sensors have numbers on them, so before you install them at a tire shop, write down all the numbers on the sensors. this saves the dealer time and you money. the dealer has a computer that will recognize each sensor after installed in a tire, but it typically takes a few minutes for it to pick up the serial codes from each sensor. its alot faster if you already have all the info and can hand it to the tech rather than having the computer to try to figure it all out. may save you a few bucks.
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Antman
Elite Member
Why don't you show us where that is in the owners manual.
1: I don't think this is true, at all.
2: I know for a fact it isn't in my 2011 manual.
3: I'm pretty sure you made a lot of this stuff up.
Maybe I'm wrong- so prove it! I'll apologize if I am.
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