Optima V6-2.7L VIN 4 (2007)
Intake Air Temperature Sensor: Testing and Inspection
INSPECTION
Intake Air Temperature Sensor (IATS) is installed inside the Mass Air Flow Sensor (MAFS) and detects the intake air temperature. To calculate precise
air quantity, correction of the air temperature is needed because air density varies according to the temperature. So the PCM uses not only MAFS signal
but also IATS signal. This sensor has a Negative Temperature Coefficient (NTC) and its resistance is in inverse proportion to the temperature.
SPECIFICATION
CIRCUIT DIAGRAM
COMPONENT INSPECTION
1. Turn ignition switch OFF.
2. Disconnect IATS connector.
3. Measure resistance between IATS terminals 4 and 5.
