Vue 2006-2007

Camshaft Position Sensor

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Description & Operation



The Camshaft Position (CMP) sensor is triggered by a notched reluctor wheel built onto the camshaft sprocket. The CMP sensor provides four signal pulses every camshaft revolution. Each notch, or feature of the reluctor wheel, is of a different size which is used to identify the compression stroke of each cylinder and to enable sequential fuel injection. The CMP sensor is connected to the PCM by the following circuits:



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

Removal & Installation



2.4L Engines
Exhaust Sensor
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the engine wiring harness electrical connector from the exhaust Camshaft Position (CMP) sensor.
  4.  
  5. Remove the CMP sensor bolt.
  6.  
  7. Remove the CMP sensor.
  8.  

To install:


NOTE
Inspect the CMP sensor for damage, replace as necessary.

  1. Lubricate the CMP sensor O-ring seal with clean engine oil.
  2.  
  3. Install the CMP sensor.
  4.  
  5. Install the CMP sensor bolt. Tighten the bolt to 89 inch lbs. (10 Nm).
  6.  
  7. Connect engine wiring harness electrical connector to the exhaust CMP sensor.
  8.  

Intake Sensor
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove the generator battery control module cover.
  4.  
  5. Disconnect the engine wiring harness electrical connector from the intake Camshaft Position (CMP) sensor.
  6.  
  7. Remove the CMP sensor bolt.
  8.  
  9. Remove the CMP sensor.
  10.  

To install:


NOTE
Inspect the CMP sensor for damage, replace as necessary.

  1. Lubricate the CMP sensor O-ring seal with clean engine oil.
  2.  
  3. Install the CMP sensor.
  4.  
  5. Install the CMP sensor bolt. Tighten the bolt to 89 inch lbs. (10 Nm).
  6.  
  7. Connect the engine wiring harness electrical connector to the intake CMP sensor.
  8.  
  9. Install the generator battery control module.
  10.  

3.5L Engine
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove the left camshaft sprocket.
  4.  
  5. Remove the bolt (240), sprocket (241), bolts (242), cover (244), and seal (243).
  6.  
  7. Remove the bolt (723) and camshaft position (CMP) sensor (700).

    Click image to see an enlarged view

    Fig. Remove bolts, camshaft sprocket, cover, and seal-3.5L engine



    Click image to see an enlarged view

    Fig. Remove the Camshaft Position (CMP) sensor-3.5L engine

  8.  

To install:

  1. Install the CMP sensor (700) and bolt (723). Tighten the bolt to 35 inch lbs. (4 Nm).
  2.  
  3. Install the cover (244), NEW seal (243) and bolts (242). Tighten the bolts to 16 ft. lbs. (22 Nm).
  4.  
  5. Install the left camshaft sprocket.
  6.  

Testing





Click image to see an enlarged view

Fig. Camshaft Position (CMP) sensor connector end view (intake)-2.4L engine



Click image to see an enlarged view

Fig. Camshaft Position (CMP) sensor connector end view (exhaust)-2.4L engine



Click image to see an enlarged view

Fig. Camshaft Position (CMP) sensor connector end view-3.5L engine

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.  

 
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