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FXTH87xx TPM sensor Pressure Measurement

Question asked by Amarnath Kanchi on Apr 7, 2017
Latest reply on Apr 12, 2017 by Tomas Vaverka

I have purchased TPM sensor FXTH8705116T1- 450kpa.

I have installed it inside Tire and filled with an air pressure of 42 PSI.

The pressure value received from the sensor is 0x1FE (TPMS_COMP_PRESSURE).

From the data sheet,  0x1FE (TPMS_COMP_PRESSURE) represents pressure overflow(high). But 450kpa sensor has a range of 14 - 65 psi(100 – 450kpa).

Also when we gradually reduced the air level from tire, sensor pressure value also decreased gradually from 0x1FE (0x1EA , 0x1Ab etc.,).

For 42 psi , expected pressure value from the sensor should be around 0x122. But  receiving 0x1FE. Please help.