Originally Posted by
Mrmiata
I don't have a reason why... or a driving desire to find out why
.. but THEY WILL SEND A SIGNAL OF A SORT WITHOUT HAVING TO DRIVE IT.
Been there, seen it for myself, and
"I think" from the Pope himself isn't going to change my mind on it.
Then your centrifugal switch on one of your sensors is stuck, or the second part of my post below is causing it.
Originally Posted by
onehundred80
It is the signal that keeps the lamp off, no signal and the lamp goes on.
Maybe when the pressure is low there is no signal sent.
Also no signal from a dead battery and the light goes on.
See Beaners post here.
I see nothing in the service manual that proves this but thats not to say the TPMS receiver doesn't have a code in it that requires a signal from any one of 4 sensors, or one from each, over a period of time or miles. The systems tie all in together so if there is a time/mileage limit somewhere in the systems interweave, then it is beyond me. If you get the light and don't want to **** with it, just do the pin mod. Seems to me if the pin mod works though, then the timer/mileage signal to the indicator lamp MUST come from the TPMS receiver. Remember, the TPMS system is mostly comprised of 5 components. The TPMS RECEIVER (just receiver) and the 4 TPMS sensors (IE TRANSMITTERS). There is no data flowing from the receiver in any way to the sensors. Just an illumination of a dash light when it (the receiver) gets a signal from any one or more of the sensors. Just no other explanation that I can come up with.