I30 1996-1997

Evaporative Emission Control System

Print

EVAP Canister



Operation

Specific to:

Infiniti G20 2000-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1998-2005

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

Specific to:

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1998-2005

The manufacturer does not provide a specific removal and installation procedure for this component. Use the illustration as a guide when servicing this component.

Clean all Evaporative Emission (EVAP) line connections and surrounding areas prior to disconnecting, in order to avoid possible EVAP system contamination.


NOTE
Do not use soapy water or any type of solvent while installing vacuum hoses or purge hoses.



Click image to see an enlarged view

Fig. Evaporative Emissions (EVAP) canister with torque values-I30, I35, M45, and Q45

Testing
EVAP Canister

Specific to:

Infiniti G20 2000-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1998-2005


NOTE
Clean all Evaporative Emission (EVAP) line connections and surrounding areas prior to disconnecting, in order to avoid possible EVAP system contamination.

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. The vapor/vacuum lines and hoses must be firmly connected.
  4.  
  5. Check the vapor/vacuum lines at the EVAP canister purge solenoid for damage or leaks.
  6.  
  7. If a leak is present, a Diagnostic Trouble Code (DTC) may be set. Check for DTC-s.
  8.  
  9. Check the EVAP canister for the following:

    Cracks at the housing
     
    Fuel saturation
     
    Water saturation
     

  10.  

Evaporative Emission Control System Diagnostics

Specific to:

Infiniti G20 2000-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1998-2005

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 0.02 inch Hg (0.067 kPa/0.5mm Hg), the Electronic Control Module (ECM) 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:

Infiniti G20 2000-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1998-2005



Click image to see an enlarged view

Fig. Related Diagnostic Trouble Codes

EVAP Purge Control Solenoid



Operation

Specific to:

Infiniti G20 2000-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1998-2005

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 Solenoid 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

Specific to:

Infiniti I30 1996-2001

The manufacturer does not provide a specific removal and installation procedure for this component. Use the illustration as a guide when servicing this component.

Clean all Evaporative Emission (EVAP) line connections and surrounding areas prior to disconnecting, in order to avoid possible EVAP system contamination.


NOTE
Do not use soapy water or any type of solvent while installing vacuum hoses or purge hoses.



Click image to see an enlarged view

Fig. Evaporative Emissions (EVAP) purge control solenoid location-I30

Testing

Specific to:

Infiniti G20 2000-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1998-2005


NOTE
Clean all Evaporative Emission (EVAP) line connections and surrounding areas prior to disconnecting, in order to avoid possible EVAP system contamination.

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Turn the Ignition ON, engine not running.
  4.  
  5. Using a 12-volt test light connected to a ground, check the EVAP purge control circuit in the EVAP purge solenoid harness connector.
    NOTE
    Any current DTC-s will need to be cleared before actuating the purge solenoid. If the DTC is not cleared, the solenoid may not be allowed to actuate.

  6.  
  7. With the scan tool, actuate the EVAP purge solenoid control to the ON 100 percent position.
  8.  
  9. The test light should be illuminated and brighten proportional to the maximum duty cycle allowed by the scan tool. For example, if the scan tool allows 100 percent actuation, the brightness should be as bright as a direct connection to the battery. If the scan tool allows a maximum 25 percent actuation, the brightness should be 25 percent as bright as a direct connection to the battery.
  10.  
  11. If the light was illuminated and bright, observe the following, verify that there is good pin-to-terminal contact in the Solenoid and ECM connectors. If necessary, replace the EVAP Purge Solenoid.
  12.  

Connection & Wiring Diagnosis

Specific to:

Infiniti G20 2000-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1998-2005

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:

Infiniti G20 2000-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1998-2005

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 0.02 inch Hg (0.067 kPa/0.5mm Hg), the Electronic Control Module (ECM) 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:

Infiniti G20 2000-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1998-2005



Click image to see an enlarged view

Fig. Related Diagnostic Trouble Codes

EVAP Purge Control Valve



Operation

Specific to:

Infiniti G20 2000-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1998-2005

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

Specific to:

Infiniti I30 1996-2001

Infiniti I35 2002-2004

The manufacturer does not provide a specific removal and installation procedure for this component. Use the illustration as a guide when servicing this component.

Clean all Evaporative Emission (EVAP) line connections and surrounding areas prior to disconnecting, in order to avoid possible EVAP system contamination.


NOTE
Do not use soapy water or any type of solvent while installing vacuum hoses or purge hoses.



Click image to see an enlarged view

Fig. Evaporative Emissions (EVAP) purge control valve location-I30 and I35

Testing

Specific to:

Infiniti G20 2000-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1996-2005

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 0.02 inch Hg (0.067 kPa/0.5mm Hg), the Electronic Control Module (ECM) will interpret this condition as a leak.

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.
 

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

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.
 

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

Connection & Wiring Diagnosis

Specific to:

Infiniti G20 2000-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1998-2005

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:

Infiniti G20 2000-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1998-2005

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 0.02 inch Hg (0.067 kPa/0.5mm Hg), the Electronic Control Module (ECM) 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:

Infiniti G20 2000-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1998-2005



Click image to see an enlarged view

Fig. Related Diagnostic Trouble Codes

Fuel Tank Vapor Pressure Sensor



Operation

Specific to:

Infiniti G20 1996, 1999-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1996-2005

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 Engine Control Module (ECM).

Removal & Installation

Specific to:

Infiniti I30 1996-2001

Infiniti I35 2002-2004

The manufacturer does not provide a specific removal and installation procedure for this component. Use the illustration as a guide when servicing this component.

Clean all Evaporative Emission (EVAP) line connections and surrounding areas prior to disconnecting, in order to avoid possible EVAP system contamination.


NOTE
Do not use soapy water or any type of solvent while installing vacuum hoses or purge hoses.



Click image to see an enlarged view

Fig. Evaporative Emissions (EVAP) control system pressure sensor location-I30 and I35

Testing
Connection & Wiring Diagnosis

Specific to:

Infiniti G20 1996, 1999-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1996-2005

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:

Infiniti G20 1996, 1999-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1996-2005

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 0.02 inch Hg (0.067 kPa/0.5mm Hg), the Electronic Control Module (ECM) 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:

Infiniti G20 1996, 1999-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1996-2005

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 Electronic Control Module (ECM) 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 0.02 inch Hg (0.067 kPa/0.5mm Hg).

Related Diagnostic Trouble Codes (DTC)

Specific to:

Infiniti G20 1996, 1999-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1996-2005



Click image to see an enlarged view

Fig. Related Diagnostic Trouble Codes

 
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