FWIW, if they have a hoseless air pressure gauge for scuba diving, this is just
as fesible.................
Thecarguru@aol.com wrote:
> Having dealt with this very recently I thought I'd chime in.
> It was described to me by someone who may or may not know exactly how it is
> accomplished so FWIW...
>
> Each wheel has an ABS sensor trigger and pickup unit. Detecting a difference
> in rotational speed between one wheel and the other three caused when a
> significant amount of air has escaped will trigger the low pressure light. So
> putting a mini spare or a tire with a different diameter than the others
> would activate the system, which will "reset" itself after the problem has
> been resolved. (eventually)
> Any car with electronic ABS already has most of the needed "hardware"
> installed, so it would only require one more "little black box" added to the
> ABS electrics to monitor the tire pressures. I can see how that would
> probably be a 45$ "plug in" option.
>
> Anyone heard differently?
> Gary
> two 75's a runnin'
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