DIY - Bypassing Tire Pressure Warning System (TPWS / TPMS) - Toyota Yaris Forums

11-25-2008, 12:53 PM

Tamago

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Quote:

Originally Posted by CTScott

They are frequency modulated pulses. The TPMS microcontroller pulls them in through an analog input.

ah cool so where they enter the ENGINE ecu they're pulse signals, then they go out to the cluster as pulses (correct me if i'm wrong, i recollect setting up a Defi VSD heads up display, and grabbed pulse signals for tach/speed) and the ECU also sends analog outputs to the TPMS?

do you have a wiring diagram of the ECU?

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