Tire Pressure Sensor Gone?

I used to have to reset the tire pressure warning light on my 2000 Sienna
every time I took it to a dealer for service (oil change & tire rotation).

Ever since I stopped taking it to dealer for service, I no longer getting
the warning lights after tire rotation.

So did I do anything wrong during tire rotation that damaged the tire
pressure sensors? I sometimes clean the brakes using brake cleaner when
rotating tires. Could the brake cleaner damage the sensors?

Should some warning lights go off if the sensors are damaged?

I do want the warning light working properly.

Thanks for any info!

Correct me if I am wrong but wouldn't an under inflated tire (smaller
circumference) have to rotate faster to keep up with the other ones?

Jack G


"Ray O" <rokigawaATtristarassociatesDOTcom> wrote in message
news:5d2bd$45b18a63$47c2b532$11392@msgid.meganewsservers.com...[color=blue]
>
> "ZR" <ZR@ABC.com> wrote in message
> news:o6fsh.13174$w91.2647@newsread1.news.pas.earthlink.net...[color=green]
>>I used to have to reset the tire pressure warning light on my 2000 Sienna
>>every time I took it to a dealer for service (oil change & tire rotation).
>>
>> Ever since I stopped taking it to dealer for service, I no longer getting
>> the warning lights after tire rotation.
>>
>> So did I do anything wrong during tire rotation that damaged the tire
>> pressure sensors? I sometimes clean the brakes using brake cleaner when
>> rotating tires. Could the brake cleaner damage the sensors?
>>
>> Should some warning lights go off if the sensors are damaged?
>>
>> I do want the warning light working properly.
>>
>> Thanks for any info![/color]
>
> I believe that the 2000 Sienna uses an indirect method of detecting low
> tire pressure. Instead of having an air pressure sensor mounted on the
> valve stem, an indirect method detects low tire pressure by detecting a
> difference in wheel rotational speed through the antilock brake system
> (ABS) wheel speed sensors. An under-inflated tire will rotate more slowly
> than the rest of the tires, and if the computer detects this condition, it
> will illuminate the warning light.
>
> I don't know why rotating tires would turn on the warning light, and
> rotating tires yourself or cleaning the brakes should not damage the wheel
> speed sensors. The ABS system does a self-diagnostic check when the
> vehicle is first started and move the first 10 feet. If a wheel speed
> sensor were damaged, the ABS warning light would illuminate.
> --
>
> Ray O
> (correct punctuation to reply)
>[/color]

"Jack G" <remove.jgrouell@comcast.net> wrote in message
news:08-dneCdCqByFizYnZ2dnUVZ_r2onZ2d@comcast.com...[color=blue]
> Correct me if I am wrong but wouldn't an under inflated tire (smaller
> circumference) have to rotate faster to keep up with the other ones?
>
> Jack G
>[/color]

Oops! I stand corrected!
--

Ray O
(correct punctuation to reply)

>>I used to have to reset the tire pressure warning light on my 2000 Sienna[color=blue][color=green]
>>every time I took it to a dealer for service (oil change & tire rotation).
>>
>> Ever since I stopped taking it to dealer for service, I no longer getting
>> the warning lights after tire rotation.
>>
>> So did I do anything wrong during tire rotation that damaged the tire
>> pressure sensors? I sometimes clean the brakes using brake cleaner when
>> rotating tires. Could the brake cleaner damage the sensors?
>>
>> Should some warning lights go off if the sensors are damaged?
>>
>> I do want the warning light working properly.
>>
>> Thanks for any info![/color]
>
> I believe that the 2000 Sienna uses an indirect method of detecting low
> tire pressure. Instead of having an air pressure sensor mounted on the
> valve stem, an indirect method detects low tire pressure by detecting a
> difference in wheel rotational speed through the antilock brake system
> (ABS) wheel speed sensors. An under-inflated tire will rotate more slowly
> than the rest of the tires, and if the computer detects this condition, it
> will illuminate the warning light.
>
> I don't know why rotating tires would turn on the warning light, and
> rotating tires yourself or cleaning the brakes should not damage the wheel
> speed sensors. The ABS system does a self-diagnostic check when the
> vehicle is first started and move the first 10 feet. If a wheel speed
> sensor were damaged, the ABS warning light would illuminate.
> --
>
> Ray O
> (correct punctuation to reply)[/color]

Great! That's a relieve. I do seem to remember one or more tire would be
flatter after the dealer rotated the tires and I had to inflate them. May be
they deflated or inflated some of the tires but forgot to do the same on all
tires.

Thanks!

"ZR" <ZR@ABC.com> wrote in message
news:w7hsh.12204$pQ3.10467@newsread4.news.pas.earthlink.net...[color=blue][color=green][color=darkred]
>>>I used to have to reset the tire pressure warning light on my 2000 Sienna
>>>every time I took it to a dealer for service (oil change & tire
>>>rotation).
>>>
>>> Ever since I stopped taking it to dealer for service, I no longer
>>> getting the warning lights after tire rotation.
>>>
>>> So did I do anything wrong during tire rotation that damaged the tire
>>> pressure sensors? I sometimes clean the brakes using brake cleaner when
>>> rotating tires. Could the brake cleaner damage the sensors?
>>>
>>> Should some warning lights go off if the sensors are damaged?
>>>
>>> I do want the warning light working properly.
>>>
>>> Thanks for any info![/color]
>>
>> I believe that the 2000 Sienna uses an indirect method of detecting low
>> tire pressure. Instead of having an air pressure sensor mounted on the
>> valve stem, an indirect method detects low tire pressure by detecting a
>> difference in wheel rotational speed through the antilock brake system
>> (ABS) wheel speed sensors. An under-inflated tire will rotate more
>> slowly than the rest of the tires, and if the computer detects this
>> condition, it will illuminate the warning light.
>>
>> I don't know why rotating tires would turn on the warning light, and
>> rotating tires yourself or cleaning the brakes should not damage the
>> wheel speed sensors. The ABS system does a self-diagnostic check when
>> the vehicle is first started and move the first 10 feet. If a wheel
>> speed sensor were damaged, the ABS warning light would illuminate.
>> --
>>
>> Ray O
>> (correct punctuation to reply)[/color]
>
> Great! That's a relieve. I do seem to remember one or more tire would be
> flatter after the dealer rotated the tires and I had to inflate them. May
> be they deflated or inflated some of the tires but forgot to do the same
> on all tires.
>
> Thanks!
>[/color]
If one or more tires are underinflated relative to the other tires, the low
tire pressure warning would illuminate. It sounds like your low tire
pressure warning system is functioning properly.
--

Ray O
(correct punctuation to reply)