Camry 2008-2009

Camshaft Position Sensor

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Location



Specific to:

Toyota Camry 2009-2010



Click image to see an enlarged view

Fig. VVT sensor location-3.5L Engine

Operation



Specific to:

Toyota Camry 2009-2010

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.

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.  

Specific to:

Toyota Camry 2009-2010

  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.  

Specific to:

Toyota Camry 2009-2010

  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.  

To install:

  1. Install the VVT sensors and tighten to 7 ft. lbs. (10 Nm).
    1. Connect the VVT sensor connectors.
    2.  

  2.  
  3. To complete installation, reverse the remaining removal procedure.
  4.  

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.  

CMP Circuit Testing

Specific to:

Toyota Camry 2009-2010

Use a suitable scan tool or a Graphing Multi-Meter (GMM in order to view the CMP data.

CMP Sensor logic is based on alternating lines of magnetic flux which generate a digital ON/OFF signal to the PCM, and are based on the speed and position of the camshaft.

Verify that the engine timing components (timing belt, timing chain, or timing gears) are properly installed, and that there is no foreign material obstructing the path between the reluctor and the CMP sensor. If any engine mechanical faults are evident, locate and repair as required before continuing.

A Digital Volt-Ohm Meter (DVOM) may be used to verify the condition of the wiring: additional information may be acquired by taking measurements at the sensor connector as well as the PCM connector. If significant resistance is measured (greater than 5 ohms) is measured, check the wiring harness and connections for corrosion, poor pin connections, or damaged wires.

If all engine wiring and pin connections are confirmed, disconnect the CMP Sensor to verify the signal with a GMM, and verify PCM communication before replacing the CMP Sensor.

Click image to see an enlarged view

Fig. CMP Sensor Range Chart

CMP Sensor Strategy

Specific to:

Toyota Camry 2009-2010

The CMP Sensor provides a digital input signal to the Powertrain Control Module (PCM) for a number of engine control system calculations. The CMP signal is compared with the Crankshaft Position Sensor (CKP) and Vehicle Speed Sensor (VSS) for measured operating conditions, and the Pulse Width Modulation pattern is used by the Powertrain Control Module (PCM) to calculate ignition timing, firing order, fuel injector timing, and misfire diagnostics.

CMP Sensor feedback patterns vary according to the reluctor configuration and PCM logic. While most models use a single tooth for Top Dead Center (TDC), others may use multiple reluctor teeth for additional positions of camshaft rotation, which may include one per cylinder, or 0°,90°, 180°, and 270° respectively.

Connection & Wiring Diagnosis

Specific to:

Toyota Camry 2009-2010

Refer to the Electrical Wiring Diagram for component and connector locations, connector views, and circuit-specific information.

Many intermittent open or short circuits may be caused by wiring harness and connector movement due to vibration, engine torque, bumps and rough pavement, etc.

  1. Test the wiring harness and connectors by performing the following tests:

    Move the related connectors and wiring while monitoring the appropriate scan tool data.
     
    Move the related connectors and wiring with the component commanded ON and OFF. Using a suitable the scan tool, observe the component operation.
     
    With the engine running, move the related connectors and wiring while monitoring component operation.
     
    If harness or connector movement affects the data displayed, the component and system operation, or the engine operation, inspect and repair the harness or connections as necessary.
     

  2.  
  3. Test the connector terminal pins and/or wiring by performing the following tests:

    Inspect for incorrect mating of the connector halves, or terminals not fully seated in the connector body.
     
    Inspect for improperly formed or damaged terminals and test for incorrect terminal tension.
     
    Inspect for poor terminal to wire connections including terminals crimped over insulation. This requires removing the terminal from the connector body.
     
    Inspect for corrosion or water intrusion. Pierced or damaged insulation can allow moisture to enter the wiring. The conductor can corrode inside the insulation with little visible evidence. Look for swollen and/or brittle sections of wire in the suspect circuits.
     
    Inspect for wires that are broken inside the insulation by gently pulling on suspect sections of wiring.
     

  4.  

Related Diagnostic Trouble Codes

Specific to:

Toyota Camry 2009-2010



Click image to see an enlarged view

Fig. Related Diagnostic Trouble Codes

 
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