Tucson 2006-2008

Intake Air Temperature Sensor

Print

Operation



Specific to:

Hyundai Tucson 2006-2008

The Intake Air Temperature (IAT) sensor is a variable resistor that measures the temperature of the air entering the engine intake manifold. The ECM supplies 5 volts to the IAT signal circuit and a ground for the IAT low reference circuit. When the sensor is cold, the resistance is greater. This results in a greater voltage on the signal circuit that is interpreted by the ECM as a colder IAT. As the sensor becomes warmer, the resistance decreases. This results in a lesser voltage on the IAT signal circuit that is interpreted by the ECM as a warmer IAT. If the ECM detects an IAT sensor signal voltage that is not within a calibrated range of the IAT sensor 1 signal voltage, a DTC is set.

Click image to see an enlarged view

Fig. Resistance decreases as the air temperature increases

Removal & Installation



Specific to:

Hyundai Tucson 2006-2008

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Disconnect the connector from the sensor.
  6.  
  7. Remove the sensor retaining screws.
  8.  
  9. Remove the sensor from its mounting.
  10.  

To install:

  1. Installation is the reverse of the removal procedure.
  2.  

Testing



2.0L Engine

Specific to:

Hyundai Tucson 2006-2008

  1. Turn the ignition switch OFF .
  2.  
  3. Disconnect the sensor connector.
  4.  
  5. Measure the resistance between terminals 1 and 5 (component side).
  6.  
  7. Specification should be 2.35-3.54 kohms at 68°F.
  8.  
  9. If within specification, check for a poor connection between the ECM and the component.
  10.  
  11. If not within specification, substitute the sensor with a known good component and check for proper operation. If the problem is corrected, replace the sensor.
  12.  

2.7L Engine

Specific to:

Hyundai Tucson 2006-2008

  1. Remove the sensor connector.
  2.  
  3. Measure the voltage between the sensor terminal 1 and 2.
  4.  
  5. Specification should be 2.35-2.54 volts at 68°F.
  6.  
  7. If within specification, check for a poor connection between the ECM and the component.
  8.  
  9. If not within specification, substitute the sensor with a known good component and check for proper operation. If the problem is corrected, replace the sensor.
  10.  

 
label.common.footer.alt.autozoneLogo