CR-V 2007-2008

Mass Air Flow Sensor

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Operation



Specific to:

Honda CR-V 2007-2008

The Mass Air Flow Sensor (MAF) sensor is a hot-film type sensor and is located in between the air cleaner and the throttle body. It consists of a tube, a sensor assembly, and honeycomb cell. It detects the intake air quantity flowing into the intake manifold. Air flows from the air cleaner assembly through the honeycomb cell and over the hot film element. At this time, heat transfer is generated by convection and the MAF sensor loses its energy. This sensor detects the mass air flow by using the energy loss and transfers the information to the PCM by a voltage transfer. The PCM calculates fuel quantity and ignition timing appropriate for the conditions.

Removal & Installation



Specific to:

Honda CR-V 2007-2008

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

To install:

  1. Install the MAF/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. Verify the integrity of the air induction system by inspecting for the following conditions:

    Damaged components
     
    Loose or improper installation
     
    An air flow restriction
     
    Any vacuum leak
     
    Water intrusion
     

  2.  
  3. Verify that any electrical aftermarket devices are properly connected and grounded.
  4.  
  5. With the engine running, observe the scan tool MAF sensor parameter.
  6.  
  7. A Wide Open Throttle (WOT) acceleration from a stop should cause the MAF sensor parameter on the scan tool to increase rapidly.
  8.  
  9. If not within specification, replace the sensor with a known good component.
  10.  

 
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