Pacifica, 2003-2005

Camshaft Position Sensor

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Description & Operation



The camshaft position sensor contains a Hall-effect device that provides cylinder identification to the Powertrain Control Module (PCM). The sensor generates pulses as groups of notches on the camshaft sprocket pass underneath it. The PCM keeps track of crankshaft rotation and identifies each cylinder by the pulses generated by the notches on the camshaft sprocket.

When metal aligns with the sensor, voltage goes low (less than 0.3v). When a notch aligns with the sensor, voltage spikes high (5.0v). As a group of notches pass under the sensor, the voltage switches from low (metal) to high (notch) then back to low. The number of notches determines the amount of pulses. If available, an oscilloscope can display the square wave patterns of each timing event.

Removal & Installation



3.5L Engine
  1. Disconnect the negative battery cable.
  2.  
  3. Remove air cleaner box.
  4.  
  5. Unlock the camshaft sensor electrical connector.
  6.  
  7. Disconnect the electrical connectors to the camshaft sensor.
  8.  
  9. Remove the mounting bolts.
  10.  
  11. Remove camshaft sensor.
  12.  

To Install:

  1. Install camshaft sensor.
  2.  
  3. Install the mounting bolts and tighten, refer to the torque chart for value.
  4.  
  5. Install and lock the camshaft sensor electrical connector.
  6.  
  7. Install air cleaner box.
  8.  
  9. Connect the negative battery cable.

    Click image to see an enlarged view

    Fig.

  10.  

3.8L Engines
  1. Disconnect the negative battery cable.
  2.  
  3. Unlock the camshaft sensor electrical connector.
  4.  
  5. Disconnect the electrical connectors to the camshaft sensor.
  6.  
  7. Loosen the mounting bolts.
  8.  
  9. Remove camshaft sensor.
  10.  
  11. Camshaft Position Sensor removed.
  12.  

To Install:

  1. Install camshaft position sensor.
  2.  
  3. Tighten the mounting bolt to Nm 12 (106 inch lbs.).
  4.  
  5. Install and lock the camshaft sensor electrical connector.
  6.  
  7. Connect the negative battery cable.

    Click image to see an enlarged view

    Fig.



    Click image to see an enlarged view

    Fig.

  8.  

 
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