Camry 2008-2009

Evaporative Emission Control System

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EVAP Canister



Location

Specific to:

Toyota Camry 2009-2010



Click image to see an enlarged view

Fig. Evaporative Emissions (EVAP) canister-Hybrid engine shown

Operation

Specific to:

Toyota Camry 2009-2010

The Evaporative Emissions (EVAP) Canister is the primary component in the Evaporative Emission (EVAP) Control System that prevents the evaporation of unburned fuel vapors (Hydrocarbons) from being released into the atmosphere. The EVAP canister contains a charcoal element for the filtering of hydrocarbons, and the filtered Carbon Dioxide (CO2) is then vented to atmosphere when the vehicle is not in operation. The canister also contains a number of ports, which provide for the redistribution of hydrocarbons into the fuel tank when the vehicle is in operation through the purge control system.

Removal & Installation
2.4L Engine
Hybrid

Specific to:

Toyota Camry 2009-2010

  1. Remove the fuel tank.
  2.  
  3. Remove the charcoal canister assembly.
    1. Disconnect the charcoal canister filter sub assembly from the charcoal canister.

      Click image to see an enlarged view

      Fig. Disconnecting the charcoal canister

    2.  
    3. Disconnect the vapor pressure sensor connector.
    4.  
    5. Disconnect the wire harness clamp.
    6.  
    7. Disconnect the purge line hose from the charcoal canister.
    8.  
    9. Remove the 3 bolts and charcoal canister bracket.

      Click image to see an enlarged view

      Fig. Removing the charcoal canister bracket

    10.  
    11. Remove the clip, bolt and charcoal canister.

      Click image to see an enlarged view

      Fig. Removing the charcoal canister

    12.  
    13. Remove the 2 bolts and charcoal canister bracket.
    14.  

  4.  

To install:

  1. Install the charcoal canister assembly.
    1. Install the charcoal canister bracket with the 2 bolts. Tighten to 48 inch lbs. (5.4 Nm).
    2.  
    3. Install the charcoal canister with the bolt and clip. Tighten to 29 ft. lbs. (39 Nm).
    4.  
    5. Install the charcoal canister bracket with the 3 bolts. Tighten the body side bracket to 29 ft. lbs. (39 Nm). Tighten the charcoal canister side to 48 inch lbs. (5.4 Nm).
    6.  
    7. Connect the purge line hose.
    8.  
    9. Connect the wire harness clamp.
    10.  
    11. Connect the vapor pressure sensor connector.
    12.  
    13. Connect the charcoal canister filter sub-assembly.
    14.  

  2.  
  3. Install the fuel tank assembly.
  4.  
  5. Inspect for an exhaust leak.
  6.  

Non-Hybrid

Specific to:

Toyota Camry 2009-2010

  1. Remove the fuel tank.
  2.  
  3. Remove the charcoal canister assembly.
    1. Disconnect the fuel tank vent hose from the charcoal canister. Push the connector deep inside. Pinch portion A. Pull out the connector.

      Click image to see an enlarged view

      Fig. Disconnecting the fuel tank vent hose from the charcoal canister

    2.  
    3. Disconnect the charcoal canister filter sub assembly from the charcoal canister. Push the connector deep inside. Pinch portion A. Pull out the connector.

      Click image to see an enlarged view

      Fig. Disconnecting the charcoal canister filter sub assembly

    4.  
    5. Disconnect the vapor pressure sensor connector.
    6.  
    7. Disconnect the wire harness clamp.
    8.  
    9. Disconnect the purge line hose from the charcoal canister.
    10.  
    11. Remove the 2 bolts, clip and charcoal canister.

      Click image to see an enlarged view

      Fig. Removing the charcoal canister

    12.  

  4.  

To install:

To install, reverse the removal procedure. Tighten the charcoal canister to 29 ft. lbs. (39 Nm).

3.5L Engine
  1. Remove the fuel tank.
  2.  
  3. Remove the charcoal canister assembly.
    1. Disconnect the fuel tank vent hose from the charcoal canister. Push the connector deep inside. Pinch portion A. Pull out the connector.

      Click image to see an enlarged view

      Fig. Disconnecting the fuel tank vent hose from the charcoal canister

    2.  
    3. Disconnect the charcoal canister filter sub assembly from the charcoal canister. Push the connector deep inside. Pinch portion A. Pull out the connector.

      Click image to see an enlarged view

      Fig. Disconnecting the charcoal canister filter sub assembly

    4.  
    5. Disconnect the vapor pressure sensor connector.
    6.  
    7. Disconnect the wire harness clamp.
    8.  
    9. Disconnect the purge line hose from the charcoal canister.
    10.  
    11. Remove the 2 bolts, clip and the charcoal canister.

      Click image to see an enlarged view

      Fig. Removing the charcoal canister

    12.  

  4.  

To install:

  1. Install the charcoal canister assembly.
    1. Install the 2 bolts, clip and charcoal canister. Tighten to 29 ft. lbs. (39 Nm).
    2.  
    3. Connect the purge line hose to the charcoal canister.
    4.  
    5. Connect the wire harness clamp.
    6.  
    7. Connect the vapor pressure sensor connector.
    8.  
    9. Connect the charcoal canister filter sub-assembly to the charcoal canister.
    10.  
    11. Connect the fuel tank vent hose to the charcoal canister.
    12.  

  2.  
  3. Install the fuel tank.
  4.  

Testing
Evaporative Emission Control System Diagnostics

Specific to:

Toyota Camry 2009-2010

When testing the EVAP system for proper operation, there should always be a pressure differential between the fuel tank pressure and atmospheric pressure. If any of the tests reveal a pressure differential of less than .02- Hg (.067 kPa/.5mm Hg), the Powertrain Control Module (PCM) will interpret this condition as a leak.

  1. Verify the condition of the EVAP system by performing the following visual inspections:

    Ensure that the fuel filler cap is installed and properly secured.
     
    Inspect the charcoal canister for physical damage such as cracks, broken or cracked fittings, damage from road debris, or rodent damage.
     
    Inspect all EVAP control devices (EVAP and purge control system monitors, controllers, and actuators) for physical damage such as cracks, broken or cracked fittings, damage from road debris, or rodent damage.
     
    Inspect all hoses and vacuum line connections for proper routing and placement.
     
    Inspect all electronic control devices for proper electrical connections.
     
    Inspect the condition of all fittings and seals for damage, drying, or wear.
     
    Inspect the condition of all hoses and vacuum lines for displacement, damage, or wear.
     

  2.  

If any physical defects are evident, verify the operation of any questionable components before replacement.

  1. Verify the operation of the EVAP system by performing any or all the following tests:

    Using a suitable scan tool, perform an actuator (active) test to verify the correct operation of EVAP control devices (EVAP and purge control system monitors, controllers, and actuators).
     
    Using a smoke machine, verify that the EVAP system does not exhibit any physical leaks.
     
    Using a suitable EVAP system pressure tester, verify that the EVAP system is properly sealed against positive and negative pressure.
     
    Using a suitable EVAP system pressure tester along with a suitable scan tool, monitor the EVAP pressure under positive and negative pressure conditions.
     

  2.  

Related Diagnostic Trouble Codes

Specific to:

Toyota Camry 2009-2010



Click image to see an enlarged view

Fig. Related Diagnostic Trouble Codes

EVAP Purge Control Valve



Location

Specific to:

Toyota Camry 2009-2010



Click image to see an enlarged view

Fig. EVAP purge control solenoid-2.4L hybrid engine shown

Operation

Specific to:

Toyota Camry 2009-2010

The Evaporative Emissions (EVAP) Control System prevents the evaporation of unburned fuel vapors (Hydrocarbons) from being released into the atmosphere. The Evaporative Emissions (EVAP) Canister contains a charcoal element for the filtering of hydrocarbons, and the filtered Carbon Dioxide (CO2) is then vented to atmosphere when the vehicle is not in operation.

When the vehicle is in operation, the Evaporative Emissions (EVAP) Purge Control Valve draws the unburned fuel vapors back into the fuel tank so that the hydrocarbons can be condensed, and redistributed to the engine for correct burning.

Removal & Installation
Hybrid Engine

Specific to:

Toyota Camry 2009-2010

  1. Remove the vacuum switching valve.
    1. Disconnect the vacuum switching valve connector.
    2.  
    3. Disconnect the wire harness clamp.
    4.  
    5. Disconnect the 2 purge line hoses from the purge VSV.
    6.  

  2.  
  3. Remove the vacuum switching valve.

    Click image to see an enlarged view

    Fig. Removing the vacuum switching valve

  4.  

To install:

To install, reverse the removal procedure.

Non-Hybrid Engines

Specific to:

Toyota Camry 2009-2010

  1. Remove the v-bank cover sub assembly.
  2.  
  3. Remove the No. 1 vacuum switching valve.
    1. Disconnect the 2 vacuum hoses and No. 1 vacuum switching valve connector.

      Click image to see an enlarged view

      Fig. Disconnecting the vacuum hoses and connector

    2.  
    3. Remove the bolt and No. 1 vacuum switching valve.

      Click image to see an enlarged view

      Fig. Removing the valve

    4.  

  4.  

To install:

To install, reverse the removal procedures. Tighten the valve to 44 inch lbs. (5 Nm).

Testing
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.  

Evaporative Emission Control System (EVAP) Diagnostics

Specific to:

Toyota Camry 2009-2010

When testing the EVAP system for proper operation, there should always be a pressure differential between the fuel tank pressure and atmospheric pressure. If any of the tests reveal a pressure differential of less than .02- Hg (.067 kPa/.5mm Hg), the Powertrain Control Module (PCM) will interpret this condition as a leak.

  1. Verify the condition of the EVAP system by performing the following visual inspections:

    Ensure that the fuel filler cap is installed and properly secured.
     
    Inspect the charcoal canister for physical damage such as cracks, broken or cracked fittings, damage from road debris, or rodent damage.
     
    Inspect all EVAP control devices (EVAP and purge control system monitors, controllers, and actuators) for physical damage such as cracks, broken or cracked fittings, damage from road debris, or rodent damage.
     
    Inspect all hoses and vacuum line connections for proper routing and placement.
     
    Inspect all electronic control devices for proper electrical connections.
     
    Inspect the condition of all fittings and seals for damage, drying, or wear.
     
    Inspect the condition of all hoses and vacuum lines for displacement, damage, or wear.
     

  2.  

If any physical defects are evident, verify the operation of any questionable components before replacement.

  1. Verify the operation of the EVAP system by performing any or all the following tests:

    Using a suitable scan tool, perform an actuator (active) test to verify the correct operation of EVAP control devices (EVAP and purge control system monitors, controllers, and actuators).
     
    Using a smoke machine, verify that the EVAP system does not exhibit any physical leaks.
     
    Using a suitable EVAP system pressure tester, verify that the EVAP system is properly sealed against positive and negative pressure.
     
    Using a suitable EVAP system pressure tester along with a suitable scan tool, monitor the EVAP pressure under positive and negative pressure conditions.
     

  2.  

Related Diagnostic Trouble Codes (DTC)

Specific to:

Toyota Camry 2009-2010



Click image to see an enlarged view

Fig. Related Diagnostic Trouble Codes

Fuel Tank Vapor Pressure Sensor



Location

Specific to:

Toyota Camry 2009-2010



Click image to see an enlarged view

Fig. Fuel tank (EVAP) vapor pressure sensor

Operation

Specific to:

Toyota Camry 2009-2010

The Fuel Tank Pressure Sensor (EVAP Pressure Sensor) is a piezoelectric (pressure-sensitive) electronic device that monitors the pressure differential between the Evaporative Emission Control (EVAP) system and atmospheric pressure. The EVAP Pressure Sensor operates within a 5 volt DC reference range, and provides a linear input signal to the Powertrain Control Module (PCM).

Removal & Installation

Specific to:

Toyota Camry 2009-2010

  1. Remove the fuel tank cap assembly.
  2.  
  3. Remove the rear seat cushion assembly.
  4.  
  5. Remove the rear floor service hole cover.
  6.  
  7. Remove the vapor pressure sensor assembly.
    1. Disconnect the connector.

      Click image to see an enlarged view

      Fig. Disconnecting the vapor pressure sensor connector

    2.  
    3. Remove the cover and tube joint clip, and pull out the vapor pressure sensor.
      NOTE
      Before this operation, check that there is no dirt or other foreign objects around the connector. Clean the connector if necessary.


      NOTE
      It is necessary to prevent mud or dirt from entering the connector. If mud or dirt gets in the connector, the O-ring may not seal properly.


      NOTE
      Do not use any tools for this operation.


      NOTE
      If the fuel suction plate and vapor pressure sensor are stuck, carefully try wiggling or pushing and pulling on the vapor pressure sensor to release it. Pull the sensor off the suction plat carefully.



      Click image to see an enlarged view

      Fig. Removing the vapor pressure sensor

    4.  

  8.  

To install:

  1. Install the vapor pressure sensor assembly.
    1. Install the vapor pressure sensor assembly with the tube joint clip and cover.
      NOTE
      Check that there are no scratches or foreign objects on the connecting part.


      NOTE
      Check that the vapor pressure sensor assembly is inserted securely.


      NOTE
      Check that the tube joint clip is on the collar of the vapor pressure sensor assembly.


      NOTE
      After installing the tube joint clip, check that the fuel tube joint is pulled off.

    2.  
    3. Connect the connector.
    4.  

  2.  
  3. Install the rear floor service hole cover.
  4.  
  5. Install the rear seat cushion assembly.
  6.  
  7. Install the fuel tank cap assembly.
  8.  

Testing
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.  

EVAP Pressure Sensor

Specific to:

Toyota Camry 2009-2010

When testing the EVAP system for proper operation, there should always be a pressure differential between the fuel tank pressure and atmospheric pressure. If any of the tests reveal a pressure differential of less than .02- Hg (.067 kPa/.5mm Hg), the Powertrain Control Module (PCM) will interpret this condition as a leak.

  1. Verify the condition of the EVAP system by performing the following visual inspections:

    Ensure that the fuel filler cap is installed and properly secured.
     
    Inspect the charcoal canister for physical damage such as cracks, broken or cracked fittings, damage from road debris, or rodent damage.
     
    Inspect all EVAP control devices (EVAP and purge control system monitors, controllers, and actuators) for physical damage such as cracks, broken or cracked fittings, damage from road debris, or rodent damage.
     
    Inspect all hoses and vacuum line connections for proper routing and placement.
     
    Inspect all electronic control devices for proper electrical connections.
     
    Inspect the condition of all fittings and seals for damage, drying, or wear.
     
    Inspect the condition of all hoses and vacuum lines for displacement, damage, or wear.
     

  2.  

If any physical defects are evident, verify the operation of any questionable components before replacement.

  1. Verify the operation of the EVAP system by performing any or all the following tests:

    Using a suitable scan tool, perform an actuator (active) test to verify the correct operation of EVAP control devices (EVAP and purge control system monitors, controllers, and actuators).
     
    Using a smoke machine, verify that the EVAP system does not exhibit any physical leaks.
     
    Using a suitable EVAP system pressure tester, verify that the EVAP system is properly sealed against positive and negative pressure.
     
    Using a suitable EVAP system pressure tester along with a suitable scan tool, monitor the EVAP pressure under positive and negative pressure conditions.
     

  2.  

Verify the operation of all EVAP system components before replacing the EVAP Pressure Sensor.

Click image to see an enlarged view

Fig. EVAP Pressure Sensor Range Chart

EVAP Pressure Sensor Strategy

Specific to:

Toyota Camry 2009-2010

The EVAP Pressure Sensor is the central component in the EVAP monitoring system. EVAP is a non-continuous monitor under Mode 6 OBD-II diagnostics, and operates within a 5 volt DC reference range. The Powertrain Control Module (PCM) utilizes EVAP Pressure Sensor data to monitor the fuel tank pressure differential, and will log a Diagnostic Trouble Code (DTC) in the event of any leak larger than .02- Hg (.067 kPa/.5mm Hg).

Related Diagnostic Trouble Codes (DTC)

Specific to:

Toyota Camry 2009-2010



Click image to see an enlarged view

Fig. Related Diagnostic Trouble Codes

 
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