Camry 2007

Camshaft Position Sensor

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Operation



Hybrid

Specific to:

Toyota Camry 2007-2008

The Camshaft Position (CMP) sensor consists of a magnet and an iron core which is wrapped with copper wire, and is installed onto the cylinder head. When the camshaft rotates, each of 3 teeth on the camshaft passes through the CMP sensor. This activates the internal magnet in the sensor, generating a voltage in the copper wire. The camshaft rotation is synchronized with the crankshaft rotation. When the crankshaft turns twice, the voltage is generated 3 times in the CMP sensor. The generated voltage in the sensor acts as a signal, allowing the ECM to locate the camshaft position. This signal is then used to control ignition timing, fuel injection timing, and the VVT system.

Non-hybrid

Specific to:

Toyota Camry 2007-2008

The Camshaft Position (CMP) sensor consists of a magnet and an iron core which is wrapped with copper wire, and is installed onto the cylinder head. When the camshaft rotates, each of 3 teeth on the camshaft passes through the CMP sensor. This activates the internal magnet in the sensor, generating a voltage in the copper wire. The camshaft rotation is synchronized with the crankshaft rotation. When the crankshaft turns twice, the voltage is generated 3 times in the CMP sensor. The generated voltage in the sensor acts as a signal, allowing the ECM to locate the camshaft position. This signal is then used to control ignition timing, fuel injection timing, and the VVT system.

For 3.5L vehicles: The Variable Valve Timing (VVT) system controls the exhaust camshaft to provide the optimal valve timing for every driving condition. This control is performed based on the signals, such as intake air volume, throttle position and engine coolant temperature. The ECM controls the Oil Control Valve (OCV), based on the signals output from the sensors. The VVT controller regulates the exhaust camshaft angle using oil pressure through the OCV. As a result, the relative position between the camshaft and the crankshaft becomes optimal, and the engine torque and fuel economy improve, and exhaust emissions decrease under overall driving conditions. Also, the ECM detects the actual valve timing using the signals from the camshaft and crankshaft position sensors, and performs feedback control. This is how target valve timing is achieved by the ECM.

Removal & Installation



2.4L Engine

Specific to:

Toyota Camry 2007-2008

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove the plastic engine cover.
  4.  
  5. Remove air cleaner cap sub-assembly.
  6.  
  7. Disconnect the camshaft position sensor connector.
  8.  
  9. Remove the bolt and camshaft position sensor.

    Click image to see an enlarged view

    Fig. Remove the bolt and camshaft position sensor-2.4L Engine

  10.  

To install:


NOTE
Make sure that the O-ring is not cracked or jammed when installing it.

  1. Apply a light coat of engine oil to the O-ring of the sensor.
  2.  
  3. Install the camshaft position sensor with the bolt and tighten to: 80 inch lbs. (9 Nm).
  4.  
  5. To complete installation, reverse removal procedure.
  6.  

3.5L Engine

Specific to:

Toyota Camry 2007-2008

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Drain and recycle the engine coolant.
  4.  
  5. Disconnect the negative battery cable.
  6.  
  7. Remove the V-bank cover sub-assembly.
  8.  
  9. Remove the windshield wiper link assembly.
  10.  
  11. Remove the front cowl top outside panel.
  12.  
  13. Remove the Intake camshaft VVT sensor (Bank 1), as follows:
    1. Disconnect the VVT sensor connector.
    2.  
    3. Remove the bolt and VVT sensor.

      Click image to see an enlarged view

      Fig. Bank 1 intake camshaft VVT sensor

    4.  

  14.  
  15. Remove the Exhaust camshaft VVT sensor (Bank 1), as follows:
    1. Disconnect the VVT sensor connector.
    2.  
    3. Remove the bolt and VVT sensor.

      Click image to see an enlarged view

      Fig. Bank 1 exhaust camshaft VVT sensor

    4.  

  16.  
  17. Remove the Exhaust camshaft VVT sensor (Bank 2), as follows:
    1. Disconnect the VVT sensor connector.
    2.  
    3. Remove the bolt and VVT sensor.

      Click image to see an enlarged view

      Fig. Bank 2 intake camshaft VVT sensor

    4.  

  18.  
  19. Remove the Intake camshaft VVT sensor (Bank 2), as follows:
    1. Disconnect the VVT sensor connector.
    2.  
    3. Remove the bolt and VVT sensor.

      Click image to see an enlarged view

      Fig. Bank 2 exhaust camshaft VVT sensor

    4.  

  20.  

Testing



2.4L Engine

Specific to:

Toyota Camry 2007-2008


NOTE
"Cold" and "Hot" mean the temperature of the coils themselves. "Cold" is from -10 to 50°C (14 to 122 °F) and "Hot" is from 50 to 100°C (122 to 212°F).

  1. Measure the resistance of the sensor:
    1. Connector :1 (G+) - 2 (G-) at 835 to 1,400 ohms at cold.
    2.  
    3. Connector :1 (G+) - 2 (G-) at 1,060 to 1,645 ohms at hot.
    4.  

  2.  
  3. If the result is not as specified, replace the camshaft position sensor.

    Click image to see an enlarged view

    Fig. Camshaft position sensor connector pinout-2.4L Engine

  4.  
  5. If there is still a problem, check harness and connector (sensor power source):
    1. Disconnect the C31 CMP sensor connector.
    2.  
    3. Disconnect the C24 ECM connector.
    4.  
    5. Measure the resistance between the terminals of the wire harness side connectors and check for an open:

      Connector: C31-1 (G2+) - C24-99 (G2+) at below 1 ohm.
       
      Connector: C31-2 (G2-) - C24-98 (G2-) at below 1 ohm.
       

    6.  
    7. Measure the resistance between the terminals of the wire harness side connectors and check for an open:

      Connector: C31-1 (G2+) or C24-99 (G2+) - Body ground at 10 kilo ohms or higher.
       
      Connector: C31-2 (G2-) or C24-98 (G2-) - Body ground at 10 kilo ohms or higher.
       

    8.  

  6.  
  7. Reconnect the ECM connector.
  8.  
  9. Reconnect the CMP sensor connector.
  10.  
  11. Repair or replace the harness or connector.

    Click image to see an enlarged view

    Fig. CMP wire harness side and ECM pinout-2.4L Engine

  12.  

3.5L Engine

Specific to:

Toyota Camry 2007-2008

  1. Check harness and connector (sensor power source):
    1. Disconnect the VVT sensor connector.
    2.  
    3. Measure the voltage according to the value(s) in the table below.

      Click image to see an enlarged view

      Fig. VVT wire harness side pinout-3.5L Engine

    4.  
    5. Reconnect the VVT sensor connector.
    6.  

  2.  
  3. Repair or replace the harness or connector.
  4.  
  5. Check harness and connector (VVT sensor for intake camshaft-ECM):
    1. Disconnect the C41 or C45 VVT sensor connector.
    2.  
    3. Disconnect the C55 ECM connector.
    4.  
    5. Measure the resistance between the terminals of the wire harness side connectors and check for an open:

      Connector: VVR+ (C41-1) - VV1+ (C55-69) at below 1 ohm.
       
      Connector: VVR- (C41-2) - VV1- (C55-92) at below 1 ohm.
       
      Connector: VVL+ (C45-1) - VV2+ (C55-67) at below 1 ohm.
       
      Connector: VVL- (C45-2) - VV2- (C55-90) at below 1 ohm.
       

    6.  
    7. Measure the resistance between the terminals of the wire harness side connectors and check for an short:

      Connector: VVR+ (C41-1) or VV1+ (C55-69) - body ground at 10 kilo ohms or higher
       
      Connector: VVR- (C41-2) or VV1- (C55-92) - body ground at 10 kilo ohms or higher
       
      Connector: VVL+ (C45-1) or VV2+ (C55-67) - body ground at 10 kilo ohms or higher
       
      Connector: VVL- (C45-2) or VV2- (C55-90) - body ground at 10 kilo ohms or higher

      Click image to see an enlarged view

      Fig. VVT wire harness side and ECM pinout-3.5L Engine

       

    8.  
    9. Reconnect the VVT sensor connector.
    10.  
    11. Reconnect the ECM connector.
    12.  

  6.  
  7. Repair or replace the harness or connector.
  8.  

 
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