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

INSPECTION

1. Turn ignition off
2. Disconnect the two pin connector at the Intake Air Temperature Sensor.

Intake Air Temperature (IAT) Sensor Operation:

3. With cold engine measure the resistance between the 2 terminals on the Sensor. Resistance should measure 0.4 - 4.0 k ohms depending on ambient and engine temperatures (see chart).
4. If resistance is out of range replace Intake Air Temp Sensor.
5. To check power to sensor, turn key to Ign. position, measure voltage between RED/YELLOW terminal at connector and body ground. Also test between RED/YELLOW terminal and GREEN/WHITE terminal. Each reading should be approx. 5.0 volts.