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RDK Question: How does the circuit work?

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Old 02-15-2021, 01:55 PM
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Zirconocene
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Default RDK Question: How does the circuit work?

I've read the Excellence article on the system (https://www.callasrennsport.com/File...ing-Part-1.pdf) but my question is a little different.

Like many cars, mine no longer has wheels which will accommodate the wheel sensor, and I don't think that it ever will. I know about the jumper across terminals 2 and 13 of the RDK computer connector, as well, to turn off the notification.

What I want to know is, if one bridges the connection at each of the wheels, is that functionally the same as bridging the 2 terminals at the computer connector? I don't know what else runs through the RDK computer (though the name seems suggestive) but would that be a way to leave that big, computer connector plugged in, while still providing the signal to deactivate the TPMS notification on the dash?

Thanks for any insight
Old 02-15-2021, 03:56 PM
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Texas993
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Thanks for the link. Good read
Old 02-15-2021, 04:09 PM
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StratfordShark
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No it’s not a continuity/no continuity signal from sensor (like say the pad sensors). The RDK box sends out high frequency signal to each sensor, and as long as there’s sufficient pressure in tyre a resonant coil/cap circuit in switch absorbs some of signal, so the signal returned to RDK computer is attenuated. The computer looks for two such signal attenuations per revolution.
Old 02-15-2021, 06:00 PM
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Zirconocene
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Thanks @StratfordShark for the information. It's a bit of a bummer, I was hoping that maybe something like a resistor wired in at each wheel might do the necessary work, but if the computer is counting things then obviously that will be a problem. Nonetheless, I have a cunning new plan: I will bridge the two terminals, but do it inside the RDK connector housing, allowing me to keep it plugged in to the RDK computer with none the wiser.

Cheers



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