Pinout Values and Diagnostic Parameters

TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM:

TERMINALS OF ECU

1. CHECK TIRE PRESSURE WARNING ECU

HINT: Inspect the connectors from the back side while the connectors are connected.





(a) Disconnect the T12 tire pressure warning antenna and receiver connector.
(b) Measure the voltage according to the value(s) in the table below.





(c) Connect the T12 tire pressure warning antenna and receiver connector.
(d) Measure the voltage and resistance according to the value(s) in the table below. If the result is not as specified, the ECU may have a malfunction.

Waveform 1:

(e) Using an oscilloscope, check waveform 1.

Waveform 2:

(f) Using an oscilloscope, check waveform 2.





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