CR-V 2007-2008

Intake Air Temperature Sensor

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Operation



Specific to:

Honda CR-V 2007-2008

The Intake Air Temperature (IAT) sensor is a variable temperature dependent resistor (thermistor) that measures the temperature of the air entering the engine intake manifold. The PCM 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 PCM 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 PCM as a warmer IAT. If the PCM detects an IAT sensor signal voltage that is not within a calibrated range of the IAT sensor signal voltage, a DTC is set.

Removal & Installation



Specific to:

Honda CR-V 2007-2008

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the MAF sensor/IAT sensor connector (A).
  4.  
  5. Remove the screws (B).
  6.  
  7. Remove the MAF sensor/IAT sensor (C).
  8.  

To install:

  1. Install the MAF sensor/IAT sensor with a new O-ring (D).
  2.  
  3. Tighten the screws (B) to 13 inch lbs. (1.5 Nm).

    Click image to see an enlarged view

    Fig. Location of Mass Air Flow (MAF) and Intake Air Temperature (IAT) sensor

  4.  

Testing



Specific to:

Honda CR-V 2007-2008

  1. Connect the Honda Diagnostics System (HDS), or equivalent scan tool, to the Data Link Connector (DLC) located under the driver's side of the dashboard.
  2.  
  3. Turn the ignition switch ON .
  4.  
  5. Check the IAT SENSOR in the DATA LIST.
  6.  
  7. Start the engine and allow it to come to operating temperature.
  8.  
  9. If voltage is not within specification, inspect the connectors and wiring harness.
  10.  
  11. If no faults are found, replace the sensor.
  12.  

 
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