On Sat, 26 Apr 2008 14:39:06 -0700 (PDT), greg <grezuki@[EMAIL PROTECTED]
>
wrote:
>On Apr 26, 8:47 am, "Ray O" <rokigawaATtristarassociatesDOTcom> wrote:
>> "mcbrue" <mcb...@[EMAIL PROTECTED]
> wrote in message
>>
>>
news:d63a0211-72e1-4191-8a22-f6972781faac@[EMAIL PROTECTED]
>>
>> > Describe how the tire pressure monitor system works. On my 2006 LS430
>> > Ultra model there are no monitoring devices present in the tire valve
>> > stems. There are no monitoring devices evident to the tire guys who
>> > install the tires. If you press and hold the tire pressure monitor
>> > button under the dash, a light comes on and says pressure monitoring
>> > is initializing - you drive it around for a block or so over 19
miles/
>> > hour and the light goes out.
>>
>> > Extra credit - is the spare tire also monitored?
>>
>> There are air pressure sensors built into the valve stems, including
the
>> spare tire.
>> --
>>
>> Ray O
>> (correct punctuation to reply)
>
>Sorry to disagree, Ray, but I believe the 06 uses the abs wheel speed
>sensors; the wheels do not have tire pressure sensors.
I thought I understood how this all worked until I read your reply
(immediately above). If I understand you correctly, you are saying
that the tire pressure warning operates with a sensor that detects an
abnormally low tire cir***ference, rather than directly sensing
pressure. Is this right? (At least with 2006 models?) If so, what
is it triggering off -- sustained differences in apparent wheel speed
between the 4 wheels?
--
Jay (remove dashes for legal email address)
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