Intake Air Temperature Sensor

INTAKE AIR TEMPERATURE (IAT) SENSOR
The intake air temperature sensor (IAT Sensor), located in the intake air hose, is a resistor-based sensor for detecting the intake air temperature. The intake air temperature information from the sensor helps the PCM provide the necessary fuel injection quantity.

Circuit Diagram [2.7 V6]:

Troubleshooting Procedures:

TROUBLESHOOTING HINTS
The MIL is ON or the DTC is displayed on the HI-SCAN under the following conditions:
1. When the intake air temperature is detected as below -40 °C or higher than 120 °C
2. When the input from the intake air temperature sensor is below 0.1 V or above 4.5 V when the engine is in a full warm-up condition.

Using Hi-scan:

Harness Inspection Procedure [2.7 V6]:

SENSOR INSPECTION
1. Use the multimeter, measure the sensor resistance.




2. Measure the resistance between the IAT sensor terminal 1 and 2.

3. If the resistance deviates from the standard value, replace the intake air temperature sensor assembly.