Signal Waveform
The output singals of IATS& ECTS change smoothly without any rapid changes. Those have almost same characteristic signal dur the early period after atsrt. It means that the temperatures of intake air and engine coolant are depended on the temperatures of atmosphere. Meanwhile, during the warming up, the output signal of ECTS is going uo increasingly. but the outputsignal of IATS changes a little bit. even it many not change almost. It means that the heat of engine does not affect on the temperature of intake air.