Fig.1) Normal waveform of IATS

Fig.2) Normal data of IATS & ECTS & EOTS at IG "on"

Fig.3) Normal data of IATS & ECTS & EOTS engine at operating temperature.

The output signals of IATS & ECTS change smoothly without any rapid changes. These 2 sensors have almost the same characteristic signal during the early period after starting. The temperatures of intake air and engine coolant are depended on the temperature of the atmosphere. During engine warm up the output signal of the ECT will change quicker than the IAT signal.