Hyundai Cars 2006-2008

Camshaft Position Sensor

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Description & Operation



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

The Camshaft Position (CMP) sensor is triggered by a notched reluctor wheel built onto the camshaft sprocket. The CMP sensor is connected to the PCM by the following circuits:



A 5-volt circuit
 
A low reference circuit
 
A signal circuit
 

The CMP sensor is a Hall-effect sensor and detects the camshaft position by using a Hall element. It is related with the Crankshaft Position (CKP) sensor and detects the piston position of each cylinder which the CKP sensor can't detect. This sensor has a Hall-effect IC which changes in output voltage when a magnetic field is made on the IC with the current flow.

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 CMP sensor.
  6.  
  7. Remove the bolt that retains the CMP sensor.
  8.  
  9. Remove the CMP sensor.
  10.  

To install:

  1. Installation is the reverse of the removal procedure.
  2.  
  3. Tighten the bolt that retains the CMP sensor to: 61-86 inch lbs. (7-10 Nm).
  4.  

Testing



Specific to:

Hyundai Entourage 2007-2008

During normal operation the PCM controls all ignition functions. If either the Crankshaft Position (CKP) or Camshaft Position (CMP) sensor signal is lost, the engine will continue to run because the PCM will default to a limp home mode using the remaining sensor input. Diagnostic trouble codes are available to accurately diagnose the ignition system with an OBD2 scan tool.

  1. Inspect the CMP sensor for correct installation. Remove the CMP sensor from the engine and inspect the sensor O-ring for damage. If the sensor is loose, incorrectly installed, or damaged, replace the CMP sensor.
  2.  
  3. Engage the CMP sensor harness connector to the CMP sensor.
  4.  
  5. Connect the scan tool to the diagnostic connector.
  6.  
  7. With the ignition ON, engine OFF observe the CMP active counter parameter on the scan tool.
  8.  
  9. Pass a flat steel object across the tip of the sensor repeatedly. The CMP active counter parameter should increment with each pass of the steel object.
  10.  
  11. If the parameter does not increment, replace the CMP sensor.
  12.  

Specific to:

Hyundai Accent 2006-2008

Hyundai Azera 2006-2008

Hyundai Elantra 2006-2008

Hyundai Sonata 2006-2008

Hyundai Tiburon 2006-2008

During normal operation the PCM controls all ignition functions. If either the Crankshaft Position (CKP) or Camshaft Position (CMP) sensor signal is lost, the engine will continue to run because the PCM will default to a limp home mode using the remaining sensor input. Diagnostic trouble codes are available to accurately diagnose the ignition system with an OBD2 scan tool.

  1. Inspect the CMP sensor for correct installation. Remove the CMP sensor from the engine and inspect the sensor O-ring for damage. If the sensor is loose, incorrectly installed, or damaged, replace the CMP sensor.
  2.  
  3. Engage the CMP sensor harness connector to the CMP sensor.
  4.  
  5. Connect the scan tool to the diagnostic connector.
  6.  
  7. With the ignition ON , engine OFF observe the CMP active counter parameter on the scan tool.
  8.  
  9. Pass a flat steel object across the tip of the sensor repeatedly. The CMP active counter parameter should increment with each pass of the steel object.
  10.  
  11. If the parameter does not increment, replace the CMP sensor.

    Click image to see an enlarged view

    Fig. Camshaft Position (CMP) sensor connector end view and circuit schematics-Azera, Sonata 3.3L engine



    Click image to see an enlarged view

    Fig. Camshaft Position (CMP) sensor connector end view and circuit schematics-Accent, Elantra, Sonata 2.4L, and Tiburon

  12.  

 
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