Pinout Values and Diagnostic Parameters

TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: TERMINALS OF ECU

TERMINALS OF ECU
HINT: Inspect the connectors from the back side.

1. CHECK TIRE PRESSURE WARNING ECU





(a) Disconnect the H19 tire pressure warning antenna and receiver connector.
(b) Measure the voltage according to the value(s) in the table below.






(c) Connect the H19 tire pressure warning antenna and receiver connector.
(d) Measure the voltage and resistance according to the value(s) in the table below.










(e) Using an oscilloscope, check the waveform 1.





HINT: The wavelength becomes shorter as the vehicle speed increases.





(f) Using an oscilloscope, check the waveform 2.





HINT: The wavelength becomes shorter as the engine speed increases.