Signal Waveform & Data

Fig 1: IATS Normal Waveform

Courtesy of HYUNDAI MOTOR AMERICA

Fig 2: IATS, ECTS & EOTS Normal Data (At Ignition On)

Courtesy of HYUNDAI MOTOR AMERICA

Fig 3: IATS, ECTS & EOTS Normal Data (After Warming Up)

Courtesy of HYUNDAI MOTOR AMERICA

The output signals of IATS & ECTS change smoothly without any rapid changes. These 2 sensor have almost the same characteristic signal during the early period after start. It means that the temperatures of intake air and engine coolant are depended on the temperature of atmosphere. Meanwhile, During engine warm up the output signal of the ECT will change quicker than the IAT signal. even it may not change almost.