Hyundai Cars 2006-2008

Mass Air Flow Sensor

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Operation



Specific to:

Hyundai Entourage 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.

Specific to:

Hyundai Accent 2006-2008

Hyundai Azera 2006-2008

Hyundai Elantra 2006-2008

Hyundai Sonata 2006-2008

Hyundai Tiburon 2006-2008

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 ECM/PCM by a voltage transfer. The ECM/PCM calculates fuel quantity and ignition timing appropriate for the conditions.

Removal & Installation



Specific to:

Hyundai Accent 2006-2008

Hyundai Azera 2006-2008

Hyundai Elantra 2006-2008

Hyundai Entourage 2007-2008

Hyundai Sonata 2006-2008

Hyundai Tiburon 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 air cleaner and air intake assembly, as required.
  8.  
  9. Remove the sensor from its mounting.
  10.  

To install:

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

Testing



Specific to:

Hyundai Entourage 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. The reading should be between 1,700-3,200 Hz depending on the Engine Coolant Temperature (ECT).
  6.  
  7. A Wide Open Throttle (WOT) acceleration from a stop should cause the MAF sensor parameter on the scan tool to increase rapidly. This increase should be from 2-6 g/s at idle to greater than 100 g/s at the time of the 1-2 shift.
  8.  
  9. Run the engine and connect the Hi-Scan (Pro)® to the Data Link Connector (DLC).
  10.  
  11. Check if the sensor output voltage is normal according to the following specification table.
  12.  
  13. If within specification, check for poor connection between the PCM and the component.
  14.  
  15. If not within specification, substitute the sensor with a known good component, check for proper operation. If the problem is corrected, replace the sensor.

    Click image to see an enlarged view

    Fig. Output Voltage and Intake Air Quantity Table



    Click image to see an enlarged view

    Fig. Air Flow and Output Frequency Table



    Click image to see an enlarged view

    Fig. Intake Air Temperature (IAT)/Mass Air Flow (MAF) sensor connector end view and schematic diagram

  16.  

Specific to:

Hyundai Accent 2006-2008

Hyundai Azera 2006-2008

Hyundai Elantra 2006-2008

Hyundai Sonata 2006-2008

Hyundai Tiburon 2006-2008

  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. The reading should be between 1,700-3,200 Hz depending on the Engine Coolant Temperature (ECT).
  6.  
  7. A Wide Open Throttle (WOT) acceleration from a stop should cause the MAF sensor parameter on the scan tool to increase rapidly. This increase should be from 2-6 g/s at idle to greater than 100 g/s at the time of the 1-2 shift.
  8.  
  9. Run the engine and connect the Hi-Scan (Pro)® to the Data Link Connector (DLC).
  10.  
  11. Check if the sensor output voltage is normal according to the following specification table.
  12.  
  13. If within specification, check for poor connection between the ECM/PCM and the component.
  14.  
  15. If not within specification, substitute the sensor with a known good component, check for proper operation. If the problem is corrected, replace the sensor.

    Click image to see an enlarged view

    Fig. Output voltage and intake air quantity table

  16.  

 
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