Air Temperature Sensor ( Ambient / Intake ): Testing and Inspection

INTAKE AIR TEMPERATURE SENSOR (IATS)




DESCRIPTION
The Intake Air Temperature Sensor (IATS) is installed into the Mass Air Flow Sensor (MAFS). The IATS uses a thermistor whose resistance changes with the temperature. The electrical resistance of the IATS decreases as the temperature increases, and increases as the temperature decreases. When the resistance value of the thermistor in IATS changes according to the intake air temperature, the signal voltage also changes. Using this signal, the information of the intake air temperature, the ECM corrects basic fuel injection duration and ignition timing.

Circuit Diagram:

CIRCUIT DIAGRAM

HARNESS INSPECTION
Refer to DTC P0111, P0112 and P0113 troubleshooting procedures.

SENSOR INSPECTION
1. Disconnect IATS connector.




2. Measure resistance between the terminals 1 and 5 of IATS connector.