Hyundai Cars 2006-2008

Manifold Absolute Pressure Sensor

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Operation



Specific to:

Hyundai Entourage 2007-2008

This sensor is a pressure sensitive variable resistor. It measures the changes in the intake manifold pressure which result from engine load and speed changes, and converts these to a voltage output. This sensor is used to measure the barometric pressure at start up, and under certain conditions, allows the PCM to automatically adjust for different altitudes. The PCM supplies 5 volts to the sensor and monitors the voltage on a signal line. The sensor provides a path to ground through its variable resistor. The sensor input affects fuel delivery and ignition timing controls in the PCM.

Specific to:

Hyundai Accent 2006-2008

Hyundai Azera 2006-2008

Hyundai Elantra 2006-2008

Hyundai Sonata 2006-2008

Hyundai Tiburon 2006-2008

The Manifold Absolute Pressure (MAP) sensor is a pressure sensitive variable resistor. It measures the changes in the intake manifold pressure which result from engine load and speed changes, and converts these to a voltage output. This sensor is used to measure the barometric pressure at start up, and under certain conditions, allows the ECM/PCM to automatically adjust for different altitudes. The ECM/PCM supplies 5 volts to the sensor and monitors the voltage on a signal line. The sensor provides a path to ground through its variable resistor. The sensor input affects fuel delivery and ignition timing controls in the ECM/PCM.

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 sensor retaining screws.
  8.  
  9. Remove the sensor from its mounting.
  10.  

To install:

  1. Installation is the reverse of the removal procedure.
  2.  
  3. Tighten the MAP sensor installation bolt to: 78-104 inch lbs. (9-12 Nm).
  4.  

Testing



Specific to:

Hyundai Entourage 2007-2008

  1. Measure the voltage between terminal 4 (sensor ground) and terminal 1 (sensor output).
  2.  
  3. Specification should be 4-5 volts, with the ignition switch ON.
  4.  
  5. Specification should be 0.8-2.4 volts at idle.
  6.  
  7. If not within specification, replace the sensor.

    Click image to see an enlarged view

    Fig. MAP sensor output voltage verses pressure change



    Click image to see an enlarged view

    Fig. Waveform of MAP sensor signal compared with the TPS signal waveform



    Click image to see an enlarged view

    Fig. MAP sensor connector end view and schematic diagram

  8.  

Specific to:

Hyundai Accent 2006-2008

Hyundai Azera 2006-2008

Hyundai Elantra 2006-2008

Hyundai Sonata 2006-2008

Hyundai Tiburon 2006-2008

  1. Measure the voltage between terminal 4 (sensor ground) and terminal 1 (sensor output).
  2.  
  3. Specification should be 4-5 volts, with the ignition switch ON.
  4.  
  5. Specification should be 0.8-2.4 volts at idle.
  6.  
  7. If not within specification, replace the sensor.

    Click image to see an enlarged view

    Fig. MAP sensor connector end view and circuit diagram



    Click image to see an enlarged view

    Fig. MAP sensor output voltage verses pressure change



    Click image to see an enlarged view

    Fig. Waveform of MAP sensor signal compared with the TPS signal waveform

  8.  

 
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