Detective Work - Dealer Misleading

[ItsOnlyNoe]

On the Normal Toyotas the light should stay on constantly if a tire is low. If there a problem as where a sensor is not being picked up it will blinking on and of constantly and after awhile stay on constant until the problem is fixed. However the car was engineered with the intention of people swapping for track day wheels which is why for those that drive awhile it eventually goes completely off again.

For others who are driving in the winter as Kaybee123 I suggest you add 1PSI for roughly every 10degrees you expect the car to be outside. Pressures drop in the cold. So say in my shop its 60 degrees but the expected low is 20degrees I add in 4psi to all tires so 35 goes to 39PSI. thats official toyota compensation chart speaking. So happy trails and happy tires to everyone.

[NOHOME]

Originally Posted by fistpoint

Use google, search for "TPMS bomb".

Build one.

Unfortunately, these do not work most of the time since motion seems to be involved in the system.

As to the OP, yeah, what you are seeing is normal. I have a short commute to work and did not see the light for a couple of weeks. Not hard to ignore after you get used to it.

[HunterGreene]

Originally Posted by NOHOME

Unfortunately, these do not work most of the time since motion seems to be involved in the system.

As to the OP, yeah, what you are seeing is normal. I have a short commute to work and did not see the light for a couple of weeks. Not hard to ignore after you get used to it.

There's a thread where the "motion" component is hotly debated. I think, since its a toyota system, that the motion part isnt included--but I may be getting it backwards.

Regardless, I've never liked the idea of a TPMS "Bomb." Bypassing a driver safety feature just because you don't like a warning light doesn't sit well with me.

[Syldrin]

I'd say what happened was your FRS was parked by another FRS and your ecu picked up the TPM from the other car. the TPM signal isn specific to each ECU it is just a brodcasted signal.

[HunterGreene]

Originally Posted by Syldrin

I'd say what happened was your FRS was parked by another FRS and your ecu picked up the TPM from the other car. the TPM signal isn specific to each ECU it is just a brodcasted signal.

Source of your info? Because I am pretty sure you are mistaken.

[Porsche]

Originally Posted by Syldrin

I'd say what happened was your FRS was parked by another FRS and your ecu picked up the TPM from the other car. the TPM signal isn specific to each ECU it is just a brodcasted signal.

It is my understanding that the TPMS senders in the summer wheels are not the same as the senders in the winter wheels … and REQUIRE REPROGRAMMING the ECU each time one swaps the wheels in the Twins. This suggests that there is NOT a universal signal sent from the senders, one being as effective as any other.

Note that not all cars are this "dumb." Our Mazda "learns" the new sensors in its winter wheels when I swap them in and out. Those sensor, while expensive, were not nearly so expensive as the latest ones from Tire Rack for the Twins.

I decided to forego the outrageously expensive TPMS senders when ordering my wheels+winter tires for the BRZ from the Tire Rack.

It took exactly 100 miles of driving before the TPMS warning light came on in the instrument cluster. It then remains steadily ON when driving. It is not as bright as the High Beam blue light, and it does not bother me at all.

Curiously, after leaving the BRZ in the driveway, not driven for many weeks, the TPMS warning light was OFF again. I wonder how long it will take to come back ON again?

In any case, it is of little concern to me. TPMS sensors did not exist until recently and fifty years of driving without them has not left me fearful.

I make a practice of checking my “gross” tire pressures every time I approach my car to drive it. It requires five seconds of my life as I detour slightly towards the passenger side as I approach the car and visually examine the “set” of the tires on that side, then proceed around to the driver’s side where I examine those tires. One can readily see a 10 psi reduction, and I can see a 5 psi loss simply by judging how “squat” the tires look. You can, too, with a bit of practice. Just do it every time you drive your car.

Those four, fist-sized patches of rubber are the only thing standing between me and St. Peter (the Pearly Gates?). I pay close attention to them.

In the spring and fall, during periods when the ambient temperatures may fluctuate widely, I may adjust my tire pressures every day or so. Tires will increase/decrease 1 psi for every 10 deg F change in temperature. On some days here in the Midwest, temps may vary 30-40 degrees in 24 hours.

It is not UNSAFE to drive without TPMS sensors. If they were FREE, sure I’d be glad to have the added assurance, but it’s unlikely they’d ever help me. They’re useless in a sudden deflation, and a slow deflation is readily discerned from behind the wheel by an experienced driver, and I regularly check the tires each time I enter my vehicle. So… lack of TPMS is NOT a problem. It’s the arrogant liberal Nanny State meddling in our lives again. For our own good, of course. Isn’t it always?

[HunterGreene]

Originally Posted by Porsche

It is my understanding that the TPMS senders in the summer wheels are not the same as the senders in the winter wheels … and REQUIRE REPROGRAMMING the ECU each time one swaps the wheels in the Twins. This suggests that there is NOT a universal signal sent from the senders, one being as effective as any other.

Note that not all cars are this "dumb." Our Mazda "learns" the new sensors in it's winter wheels when I swap them in and out. Those sensor, while expensive, were not nearly so expensive as the latest ones from Tire Rack for the Twins.

I decided to forego the outrageously expensive TPMS senders when ordering my wheels+winter tires for the BRZ from the Tire Rack.

It took exactly 100 miles of driving before the TPMS warning light came on in the instrument cluster. It then remains steadily ON when driving. It is not as bright as the High Beam blue light, and it does not bother me at all.

Curiously, after leaving the BRZ in the driveway, not driven for many weeks, the TPMS warning light was OFF again. I wonder how long it will take to come back ON again?

In any case, it is of little concern to me. TPMS sensors did not exist until recently and fifty years of driving without them has not left me fearful.

I make a practice of checking my “gross” tire pressures every time I approach my car to drive it. It requires five seconds of my life as I detour slightly towards the passenger side as I approach the car and visually examine the “set” of the tires on that side, then proceed around to the driver’s side where I examine those tires. One can readily see a 10 psi reduction, and I can see a 5 psi loss simply by judging how “squat” the tires look. You can, too, with a bit of practice. Just do it every time you drive your car.

Those four, fist-sized patches of rubber are the only thing standing between me and St. Peter (the Pearly Gates?). I pay close attention to them.

In the spring and fall, during periods when the ambient temperatures may fluctuate widely, I may adjust my tire pressures every day or so. Tires will increase/decrease 1 psi for every 10 deg F change in temperature. On some days here in the Midwest, temps may vary 30-40 degrees in 24 hours.

It is not UNSAFE to drive without TPMS sensors. If they were FREE, sure I’d be glad to have the added assurance, but it’s unlikely they’d ever help me. They’re useless in a sudden deflation, and a slow deflation is readily discerned from behind the wheel by an experienced driver, and I regularly check the tires each time I enter my vehicle. So… lack of TPMS is NOT a problem. It’s the arrogant liberal Nanny State meddling in our lives again. For our own good, of course. Isn’t it always?

QFMFT

[Porsche]

Originally Posted by HunterGreene

QFMFT

Had to look that up.

Thank you, my friend!

[smbrm]

More info on TPMS

http://www.ft86club.com/forums/showp...3&postcount=94

See also the links in this attachment.

Cheers

[Syldrin]

Originally Posted by HunterGreene

Source of your info? Because I am pretty sure you are mistaken.

6 years of owning my scion replacing the same TPM they use in every toyota on multiple cars and never having to program anything.

[Syldrin]

Originally Posted by Porsche

It is my understanding that the TPMS senders in the summer wheels are not the same as the senders in the winter wheels … and REQUIRE REPROGRAMMING the ECU each time one swaps the wheels in the Twins. This suggests that there is NOT a universal signal sent from the senders, one being as effective as any other.

hmmm weird maybe they didn't go with the toyota system? i don't know because up until 2010 my experience with them is put the new sensor in run the car for a bit and the ecu should pick up the signal.

[HunterGreene]

Originally Posted by Syldrin

hmmm weird maybe they didn't go with the toyota system? i don't know because up until 2010 my experience with them is put the new sensor in run the car for a bit and the ecu should pick up the signal.

By your logic, then, just driving by another car with the toyota TPMS system wouldnt work, since it would have to be picking up the same signal for a while.

Admittedly, I don't know much about these systems, even having a tC for 6 years previous to owning the FR-S. However, when I read the manual and it has a note about programming new TPM sensors, I'm inclined to think that there is a difference between one set and the next.

[sklimo]

Originally Posted by Porsche

Had to look that up.

Thank you, my friend!

Me too!!!! LOL

[Syldrin]

Originally Posted by HunterGreene

By your logic, then, just driving by another car with the toyota TPMS system wouldnt work, since it would have to be picking up the same signal for a while.

Admittedly, I don't know much about these systems, even having a tC for 6 years previous to owning the FR-S. However, when I read the manual and it has a note about programming new TPM sensors, I'm inclined to think that there is a difference between one set and the next.

i didn't mean to make it sound imediate it has to be a while. maybe i am mistaken but from what i remember when i've replaced these sensors for firends they never had to have the ecu reprogrammed or anything.