(b) Start the engine.
(c) Check the waveform of the ECU connector using an oscilloscope while idling the engine.
OK:
Text in Illustration
Tool Setting
HINT
The wavelength becomes shorter as the engine speed increases.
NG -- CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU - ECM)
OK -- REPLACE TIRE PRESSURE WARNING ECU
3. CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU - ECM)
(a) Disconnect the F53 ECU connector.
(b) Disconnect the A43 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
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