TPMS Warning Light and Cold Weather in Camry [Toyota]

Prev: Are you really happy with your penis size?
Next: {BS} NBC's Save the Planet week...

From: Hachiroku ハチロク on 8 Dec 2009 20:08

On Tue, 08 Dec 2009 16:57:16 -0800, SMS wrote:

> Ray O wrote:
>
>> I would check all of the tires, including the spare, with a tire
>> pressure gauge and inflate to at least the pressures indicated in the
>> owner's manual and on the driver's door or glove box door.
>
> All the tires were fine. The light went out by itself. They were all 29.5
> to 30 psi, taken with a high quality dial type pressure gauge. It says
> that they should be 32 psi, and I have no idea what the range is before
> the light comes on. Maybe it's 10% and one of the tires was at 28 psi
> early this morning.
>
> I recall renting a Chrysler minivan last year in Utah and when we were up
> near Yellowstone in high elevation the TPMS light came on when there was
> nothing wrong. I mentioned it when I returned the vehicle and they said
> that it was a common occurrence in higher elevations (and they gave me one
> day of the rental free just for telling them about the problem!).
>
> It appears as if the TPMS systems don't correct for altitude or
> temperature.

Most likely, not. Remember, at higher altitudes, air pressure is lower.
Same for a cold day.

Funny thing is, here in the great Northeast, even on sub-zero days, my
TPMS never goes off. Perhaps it is programmed different for cold days.

Where do you live in the area? I wanted to go there 30 years ago but never
made it.

From: Hachiroku ハチロク on 8 Dec 2009 20:08

On Tue, 08 Dec 2009 18:51:37 -0500, JoeSpareBedroom wrote:

> "Ray O" <rokigawa(a)NOSPAMtristarassociates.com> wrote in message
> news:hfm54g$flk$2(a)news.eternal-september.org...
>>
>> "SMS" <scharf.steven(a)geemail.com> wrote in message
>> news:4b1e7b10$0$1641$742ec2ed(a)news.sonic.net...
>>> My TPMS warning light came on this morning. It also happened to be one
>>> the rare sub-freezing days we get in Silicon Valley. The tires are
>>> fine.
>>>
>>> Is it best to ignore the light, or add air to compensate for the lower
>>> pressure caused by the cold weather?
>>
>> I would check all of the tires, including the spare, with a tire
>> pressure gauge and inflate to at least the pressures indicated in the
>> owner's manual and on the driver's door or glove box door. --
>>
>> Ray O
>
>
> How do you eliminate this silly thing entirely? Just replace valve stems
> with normal ones?

I think it works off the ABS system, IIRC.

From: Hachiroku ハチロク on 8 Dec 2009 20:11

From: Ray O on 9 Dec 2009 00:57

"Hachiroku ????" <Trueno(a)e86.GTS> wrote in message
news:pan.2009.12.09.01.08.37.251482(a)e86.GTS...
> On Tue, 08 Dec 2009 18:51:37 -0500, JoeSpareBedroom wrote:
>
>> "Ray O" <rokigawa(a)NOSPAMtristarassociates.com> wrote in message
>> news:hfm54g$flk$2(a)news.eternal-september.org...
>>>
>>> "SMS" <scharf.steven(a)geemail.com> wrote in message
>>> news:4b1e7b10$0$1641$742ec2ed(a)news.sonic.net...
>>>> My TPMS warning light came on this morning. It also happened to be one
>>>> the rare sub-freezing days we get in Silicon Valley. The tires are
>>>> fine.
>>>>
>>>> Is it best to ignore the light, or add air to compensate for the lower
>>>> pressure caused by the cold weather?
>>>
>>> I would check all of the tires, including the spare, with a tire
>>> pressure gauge and inflate to at least the pressures indicated in the
>>> owner's manual and on the driver's door or glove box door. --
>>>
>>> Ray O
>>
>>
>> How do you eliminate this silly thing entirely? Just replace valve stems
>> with normal ones?
>
> I think it works off the ABS system, IIRC.
>
Some Toyota with early TPMS systems used the speed sensors for the ABS
system but the trend has been to have a pressure sensor attached to the
valve stem inside the tire that communicate via RF with an ECM in the car.
--

Ray O
(correct punctuation to reply)

From: Ray O on 9 Dec 2009 01:01

"JoeSpareBedroom" <newstrash(a)frontiernet.net> wrote in message
news:6EBTm.59326$We2.53343(a)newsfe09.iad...
> "Ray O" <rokigawa(a)NOSPAMtristarassociates.com> wrote in message
> news:hfm54g$flk$2(a)news.eternal-september.org...
>>
>> "SMS" <scharf.steven(a)geemail.com> wrote in message
>> news:4b1e7b10$0$1641$742ec2ed(a)news.sonic.net...
>>> My TPMS warning light came on this morning. It also happened to be one
>>> the rare sub-freezing days we get in Silicon Valley. The tires are fine.
>>>
>>> Is it best to ignore the light, or add air to compensate for the lower
>>> pressure caused by the cold weather?
>>
>> I would check all of the tires, including the spare, with a tire pressure
>> gauge and inflate to at least the pressures indicated in the owner's
>> manual and on the driver's door or glove box door.
>> --
>>
>> Ray O
>
>
> How do you eliminate this silly thing entirely? Just replace valve stems
> with normal ones?
>
I usually recommend inflating the tires to 5 or 6 PSI above the values
indicated on the door frame to improve tread life. That would also solve
the warning light coming on at high altitudes or low temps.

You could try replacing the valve stems with normal ones but you might get a
warning light because the ECM can't find the sensor.
--

Ray O
(correct punctuation to reply)

First | Prev | Next | Last
Pages: 1 2 3 4 5
Prev: Are you really happy with your penis size?
Next: {BS} NBC's Save the Planet week...