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    Aura, Outlook 2007

    Camshaft Position Sensor Actuator

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    Operation



    The Camshaft Position (CMP) actuator is attached to each camshaft and is hydraulically operated in order to change the angle of the camshaft relative to Crankshaft Position (CKP). The CMP actuator solenoid is controlled by the control module. The control module sends a pulse width modulated 12-volt signal to a CMP actuator solenoid. The solenoid controls the amount of engine oil flow to a CMP actuator. The CMP actuator can change the camshaft angle a maximum of 25 degrees. The control module increases the pulse width to accomplish the desired camshaft operation.

    Removal & Installation



    2.4L Engine
    1. Remove the intake manifold cover.
    2.  
    3. Disconnect the engine wiring harness electrical connector from the exhaust Camshaft Position (CMP) actuator solenoid valve, if required.
    4.  
    5. Disconnect the engine wiring harness electrical connector from the intake CMP actuator solenoid valve, if required.
    6.  
    7. Remove the exhaust CMP actuator solenoid valve bolt and valve, if required.
    8.  
    9. Remove the intake CMP actuator solenoid valve bolt and valve, if required.
    10.  
    11. Inspect the solenoid valve O-ring seals for damage, replace as necessary.
    12.  

    To install:

    1. Installation is the reverse of removal, tighten the bolt to 89 in. lbs. (10 Nm).
    2.  
    3. Lubricate the solenoid valve O-ring seals with clean engine oil.
    4.  

    3.5L & 3.6L Engines
    Bank 1 (Right Side) Exhaust
    1. Remove the air cleaner assembly.
    2.  
    3. Disconnect the engine wiring harness electrical connector from the bank 1 exhaust Camshaft Position (CMP) actuator solenoid valve.
    4.  
    5. Remove the CMP actuator solenoid valve bolt.
    6.  
    7. Remove the CMP actuator solenoid valve.
    8.  
    9. Inspect the CMP actuator solenoid valve seal and replace as necessary.
    10.  

    To install:

    1. Installation is the reverse of removal, tighten the bolt to 89 in. lbs. (10 Nm).
    2.  
    3. Lubricate the solenoid valve O-ring seals with clean engine oil.
    4.  

    Bank 1 (Right Side) Intake
    1. Remove the air cleaner assembly.
    2.  
    3. Remove the air conditioning (A/C) line push pin retainer and reposition the line out of the way.
    4.  
    5. Loosen the bank 1 intake Camshaft Position (CMP) actuator solenoid valve bolt enough to disconnect the engine wiring harness electrical connector from the CMP actuator solenoid valve.
    6.  
    7. Disconnect the engine wiring harness electrical connector from the CMP actuator solenoid valve.
    8.  
    9. Remove the CMP actuator solenoid valve bolt.
    10.  
    11. Remove the CMP actuator solenoid valve.
    12.  
    13. Inspect the CMP actuator solenoid valve seal and replace as necessary.
    14.  

    To install:

    1. Installation is the reverse of removal, tighten the bolt to 89 in. lbs. (10 Nm).
    2.  
    3. Lubricate the solenoid valve O-ring seals with clean engine oil.
    4.  

    Bank 2 (Left Side) Exhaust
    1. Remove the air cleaner assembly.
    2.  
    3. Remove the engine mount strut bracket.
    4.  
    5. Disconnect the engine wiring harness electrical connector from the bank 2 exhaust Camshaft Position (CMP) actuator solenoid valve.
    6.  
    7. Remove the CMP actuator solenoid valve bolt.
    8.  
    9. Remove the CMP actuator solenoid valve.
    10.  
    11. Inspect the CMP actuator solenoid valve seal for damage and replace as necessary.
    12.  

    To install:

    1. Installation is the reverse of removal, tighten the bolt to 89 in. lbs. (10 Nm).
    2.  
    3. Lubricate the solenoid valve O-ring seals with clean engine oil.
    4.  

    Bank 2 (Left Side) Intake
    1. Remove the engine mount strut bracket.
    2.  
    3. Disconnect the engine wiring harness electrical connector from the bank 2 intake Camshaft Position (CMP) actuator solenoid valve.
    4.  
    5. Remove the CMP actuator solenoid valve bolt.
    6.  
    7. Remove the CMP actuator solenoid valve.
    8.  
    9. Inspect the CMP actuator solenoid valve seal for damage and replace as necessary.
    10.  

    To install:

    1. Installation is the reverse of removal, tighten the bolt to 89 in. lbs. (10 Nm).
    2.  
    3. Lubricate the solenoid valve O-ring seals with clean engine oil.
    4.  

    Testing



    2.4L Engine


    Click image to see an enlarged view

    Fig. Camshaft Position (CMP) Sensor Actuator terminals-2.4L engine exhaust (A) CMP control (B) Low reference



    Click image to see an enlarged view

    Fig. Camshaft Position (CMP) Sensor Actuator terminals-2.4L engine intake (A) CMP control (B) Low reference

    1. Turn the ignition ON, measure for battery voltage between the CMP actuator solenoid high control of the affected actuator and a ground. If less than battery voltage, test the CMP actuator high control circuit for an open, short to ground. If the circuit tests normal, replace the control module.
    2.  
    3. Connect a test lamp between the CMP actuator solenoid high control of the affected actuator and a good ground. The test lamp should not illuminate. If the test lamp illuminates, test the CMP actuator high control circuit for a short to voltage. If the circuit tests normal, replace the control module.
    4.  
    5. Command each CMP actuator solenoid between 0-50 percent. The test lamp should turn ON and OFF. If the test lamp does not turn ON and OFF, test the CMP actuator high control circuit for high resistance. If the circuit tests normal, replace the control module.
    6.  
    7. Connect a test lamp between the low reference circuit of the CMP actuator solenoid of the affected actuator and battery voltage. The test lamp should illuminate. If the test lamp does not illuminate, test the low reference circuit for an open, high resistance. If the circuit tests normal, replace the control module.
    8.  
    9. Determine that the vehicle has the correct engine oil. If the engine oil life system monitor displays the Change Oil Soon message, the engine oil is more than one year old, contains additives, or is not the correct viscosity, change the oil.
    10.  
    11. Check the engine oil pressure. If the oil pressure is low, correct the low pressure first.
    12.  
    13. Inspect each CMP actuator solenoid valve assembly for torn screens, debris on the screens, debris clogging the oil ports, missing screens and oil seepage.
    14.  
    15. Also check for excessive timing chain play and proper installation of the actuator assembly.
    16.  
    17. Measure the resistance of each CMP actuator solenoid valve assembly. Resistance should be between 8-12 ohms.
    18.  
    19. Connect a jumper wire between the CMP actuator low reference circuit at the solenoid and a good ground. Connect a fused jumper wire to the CMP actuator high control circuit at the solenoid. Momentarily touch the fused jumper to B+. Observe the spool valve inside the CMP actuator. The spool valve should move from fully closed to fully opened position.
    20.  

    3.5L And 3.6L Engines


    Click image to see an enlarged view

    Fig. Camshaft Position (CMP) actuator sensor terminals-3.5L and 3.6L engines (1) Camshaft Position Actuator Solenoid High Control (2) Low Reference

    1. Turn the ignition OFF, disconnect the affected CMP actuator solenoid harness connector at the CMP actuator solenoid.
    2.  
    3. Test for less than 1 ohm of resistance between the low reference circuit and ground. If greater than 1 ohm, test the low reference for an open/high resistance. If the circuit tests normal replace the ECM.
    4.  
    5. Connect a test lamp between the high control circuit and the low reference circuit.
    6.  
    7. Command the affected CMP actuator solenoid ON and OFF. The test lamp should turn ON and OFF when changing between commanded states. If the test lamp is always ON, test the high control circuit for a short to voltage. If the circuit tests normal replace the ECM. If test lamp is always OFF, test the control circuit for a short to ground, an open/high resistance. If the circuit tests normal replace the ECM.
    8.  
    9. If all circuits test normal, test or replace the applicable CMP Actuator solenoid.
    10.  
    11. Test for less than 1 ohm of resistance between the applicable CMP actuator solenoid low reference circuit and ground. If greater than 1 ohm, test the low reference for an open/high resistance. If the circuit tests normal, replace the applicable CMP actuator solenoid.
    12.  
    13. Test for less than 1 ohm of resistance on the applicable CMP actuator solenoid high control circuit. If greater than 1 ohm, test the high control circuit for an open/high resistance. If the circuit tests normal, replace the applicable CMP actuator solenoid.
    14.  
    15. Inspect the affected CMP actuator.
    16.  
    17. Inspect the engine timing components.
    18.  
    19. Turn the ignition OFF, disconnect the CMP actuator solenoid harness connector at the CMP actuator solenoid.
      NOTE
      Ensure component is tested at 20°C (68°F).

    20.  
    21. Test for 4.6-7.5 ohms of resistance between the high control terminal A and the low reference terminal B of the CMP actuator solenoid. If the resistance is not within the specified range, replace the CMP actuator solenoid.
      NOTE
      Do not allow the solenoid to be energized for more than 2 seconds.

    22.  
    23. Install fused jumper wire between the high control and 12 volts. Install a jumper wire between the low reference and momentarily connect to ground.
    24.  
    25. Point the CMP actuator solenoid towards a shop towel. Observe the operation of the solenoid immediately extends. If the function does not perform as specified, replace the CMP actuator solenoid.
    26.  

     
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