Log In
Search suggestions

    My Vehicles

    1996 Honda Accord 2.2L MFI 4cyl

    My Store

    1720 S RIDGEWOOD A
    (386) 427-1210

    OPEN 'til 9:00 PM today

    GET A $25 GIFT CARD FOR EVERY $100 SPENT ON ONLINE SHIP-TO-HOME ORDERS.

    Use Code: GIFTME

    See Details

    Chrysler Cirrus/Stratus/Sebring/Avenger/Breeze 1995-1998

    Evaporative Emission Controls

    Print

    OPERATION



    The evaporation control system prevents the emission of fuel tank vapors into the atmosphere. When fuel evaporates in the fuel tank, the vapors pass through vent hoses or tubes to a charcoal filled evaporative canister. This canister holds the vapors temporarily. The Powertrain Control Module (PCM) allows intake manifold vacuum to draw vapors into the combustion chambers during certain operating conditions. The evaporation control system is made up of the following components:

    Rollover Valve

    All Cirrus, Stratus, Sebring convertible and Breeze models are equipped with rollover valve(s). The rollover valve is a safety device which prevents fuel flow through the fuel tank vent valve hoses, should the vehicle roll over in an accident. The rollover valve is located on top of the fuel tank. In order to access the rollover valve, the fuel tank must be removed; however, the valve is not a serviceable component.

    EVAP Canister

    All vehicles use a sealed, maintenance-free evaporative (EVAP) canister. Fuel tank pressure vents into the canister. The canister temporarily holds the fuel vapors until intake manifold vacuum draws them into the combustion chamber. The PCM purges the canister through the duty cycle EVAP purge solenoid. The canister is purged at intervals and engine conditions which are predetermined by the PCM.

    On all 1995-97 vehicles, as well as the 1998 Sebring convertible, the canister mounts to a bracket located behind the front passenger side fascia. On 1998 vehicles, except Sebring convertible, the canister is mounted to the rear of the vehicle, on top of the fuel tank. The vacuum and vapor tubes connect to the top of the canister. There is no scheduled maintenance interval for the charcoal canister.

    Duty Cycle Evap Purge Solenoid Valve

    See Figure 1

    Sebring and Avenger coupes with the 2.5L engine and all 1995-97 Cirrus, Stratus, Sebring convertible and Breeze models are equipped with a Duty Cycle EVAP Purge solenoid. The Duty Cycle EVAP Purge solenoid regulates the rate of vapor flow from the EVAP canister to the throttle body. The PCM operates the solenoid. During the cold start warm-up period and the hot start time delay, the PCM does not energize the solenoid. When de-energized, no vapors are purged.



    Click image to see an enlarged view

    Fig. Fig. 1: Duty Cycle EVAP Purge solenoid

    When purging, the PCM energizes and de-energizes the solenoid about 5-10 times per second, depending upon operating conditions. The PCM varies the vapor flow rate by changing the solenoid pulse width. Pulse width is the amount of time the solenoid energizes.

    The solenoid will not operate properly unless it is installed with the electrical connector at the top.

    Proportional Purge Solenoid

    See Figures 2 and 3

    All Sebring and Avenger coupes with the 2.0L DOHC engine, as well as all 1998 Cirrus, Stratus, Sebring convertible and Breeze models come equipped with a Proportional Purge solenoid. The solenoid regulates the rate of vapor flow from the EVAP canister to the throttle body. The PCM operates the solenoid. During the cold start warm-up period and the hot start time delay, the PCM does not energize the solenoid. When de-energized, no vapors are purged.



    Click image to see an enlarged view

    Fig. Fig. 2: Location of the Proportional Purge solenoid on Cirrus, Stratus, Sebring convertible and Breeze models



    Click image to see an enlarged view

    Fig. Fig. 3: Location of the Proportional Purge solenoid on Sebring and Avenger coupe models

    The solenoid operates at a frequency of 200 Hz and is controlled by an engine controller circuit that senses the current being applied to the solenoid, then adjusts that same current to achieve the desired purge flow. The proportional purge solenoid controls the purge rate of the fuel vapors from the EVAP canister and fuel tank to the engine intake manifold.

    Pressure Vacuum Filler Cap

    See Figure 4

    A pressure vacuum relief cap is used to seal the fuel tank. Tightening the cap on the fuel filler tube creates a seal between them. The relief valves in the cap are a safety feature which prevent possible excessive pressure or vacuum in the fuel tank. Excessive fuel tank pressure could be caused by a malfunction in the system or damage to the vent lines.

    When the cap is removed, the seal is broken and fuel tank pressure is relieved. If the filler cap ever needs to be replaced, make sure to get the correct part.



    Click image to see an enlarged view

    Fig. Fig. 4: Pressure vacuum relief fuel filler cap

    Leak Detection Pump

    All vehicles except the Sebring and Avenger coupes use a leak detection pump, which is a device used to find leaks in the evaporative emission system. The pump has a 3-port solenoid, a pump that contains a switch, a spring loaded canister vent valve seal, 2 check valves and a spring/diaphragm.

    COMPONENT TESTING



    Purge Control System Check
    1995-97 VEHICLES

    See Figure 5

    1. Disconnect the vacuum hose from the throttle body, then connect it to a hand-held vacuum pump.
    2.  
    3. Plug the nipple where the vacuum hose was disconnected.
    4.  



    Click image to see an enlarged view

    Fig. Fig. 5: Be sure to plug the vacuum hose nipple on the throttle body before checking the system

    1. Start the engine. When the engine reaches operating temperature, that is, a coolant temperature of 176°F (80°C) or higher, apply 15.7 in. Hg (53 kPa) of vacuum at idle to check the condition of the engine and vacuum as follows:
      1. Right after the engine is started, the vacuum should be maintained.
      2.  
      3. After ten or more seconds, the vacuum should leak.
      4.  

    2.  
    3. If any of the test results differ from the specifications, there is a fault in the operation of the system and further diagnosis is required.
    4.  

    1998 VEHICLES

    See Figure 6

    This test requires the use of a special purge flow indicator tool, MB995061 or equivalent.

    1. Disconnect the purge hose from the EVAP canister, then connect Purge Flow Indicator MB995061, or equivalent, between the canister and the purge hose.
    2.  
    3. The engine should be warmed up to operating temperature, that is, a coolant temperature of 170-203°F (80-95°C) or higher, with all lights, fans and accessories off. The transaxle should be in Park for automatics or Neutral for manuals. Headlights and tail lights on Canadian vehicles will stay on even after the light switch is turned off, but this is okay.
    4.  



    Click image to see an enlarged view

    Fig. Fig. 6: Schematic for the purge control system check

    1. Run the engine at idle for at least 3-4 minutes.
    2.  
    3. Check the purge flow volume when the brake is depressed suddenly a few times. The reading should be 2.5 SCFH (20cm/sec.) or more.
    4.  
    5. If the volume is less than the standard value, check it again with the vacuum hose disconnected from the canister. If the purge flow volume is less than the standard, check for blockages in the vacuum port and vacuum hose, and also inspect the evaporative emission purge solenoid and purge control valve.
    6.  
    7. If the purge flow volume is at the standard value, replace the EVAP canister.
    8.  

    Purge Port Vacuum Check

    See Figure 7

    1. Disconnect the hose from the throttle body purge vacuum nipple.
    2.  
    3. Connect a hand-held vacuum pump to the nipple.
    4.  



    Click image to see an enlarged view

    Fig. Fig. 7: Checking the purge port vacuum using a hand-held vacuum pump

    1. Start the engine and raise the idle. Regardless of the increase in engine RPM, vacuum should remain constant.
    2.  
    3. If no engine vacuum registers on the pump, inspect the throttle body purge port for clogging.
    4.  

    Evaporative Emission Purge Solenoid

    See Figures 8 and 9

    1. Tag and disconnect the vacuum hoses from the Duty Cycle Evap Purge Solenoid or Proportional Purge Solenoid.
    2.  
    3. Detach the harness connector.
    4.  
    5. Attach a hand-held vacuum pump to the nipple (A) of the solenoid valve, as shown in the accompanying figures.
    6.  



    Click image to see an enlarged view

    Fig. Fig. 8: Connect a hand-held vacuum pump to nipple A of the solenoid valve



    Click image to see an enlarged view

    Fig. Fig. 9: Measure the resistance between the solenoid valve connector terminals

    1. Check air tightness by applying vacuum with voltage applied directly from the battery to the Evaporative Emission Purge solenoid, and then without applying voltage. The desired results are as follows:

      With battery voltage applied-vacuum should leak
       
      With battery voltage not applied-vacuum should be maintained
       

    2.  
    3. Measure the resistance across the terminals of the solenoid. The standard values are as follows:
      1. 1995-97 2.0L and 2.4L engines: 25-35 ohms when at 68°F (20°C).
      2.  
      3. 1995-97 2.5L engine: 31-45 ohms when at 68°F (20°C).
      4.  
      5. All 1998 engines: 27-37 ohms when at 68°F (20°C).
      6.  

    4.  
    5. If the test results differ from the specifications, replace the Evaporative Emission Purge solenoid.
    6.  

    REMOVAL & INSTALLATION



    Evaporative Canister
    ALL 1995-97 VEHICLES AND 1998 SEBRING CONVERTIBLE

    See Figure 10

    1. Disconnect the negative battery cable.
    2.  
    3. Raise and safely support the vehicle. Remove the front passenger's side wheel.
    4.  
    5. Remove the retainers, then remove the splash shield.
    6.  
    7. Tag and disconnect the vacuum lines from the evaporative canister.
    8.  
    9. Push the locking tab on the electrical connector to unlock and disengage the connector.
    10.  
    11. Unfasten the retaining nuts, then remove the canister from the mounting bracket.
    12.  



    Click image to see an enlarged view

    Fig. Fig. 10: Typical EVAP canister location behind the right lower front bumper fascia

    To install:
    1. Install the evaporative canister to the bracket, then secure with the retaining nuts. Tighten to 50 inch lbs. (5.6 Nm).
    2.  
    3. Attach the electrical connector to the pump, then push the locking tab to lock the connector in place.
    4.  
    5. Connect the vacuum lines to the canister, as tagged during removal.
    6.  
    7. Install the splash shield, securing it with the retainers.
    8.  
    9. Install the wheel, then carefully lower the vehicle.
    10.  
    11. Connect the negative battery cable.
    12.  

    1998 VEHICLES EXCEPT SEBRING CONVERTIBLE

    See Figure 11

    1. Disconnect the negative battery cable.
    2.  
    3. Properly relieve the fuel system pressure, as described in Fuel System .
    4.  
    5. Raise and safely support the rear of the vehicle securely on jackstands.
    6.  
    7. Remove the fuel tank assembly, as described in Fuel System .
    8.  
    9. Disconnect and label the hoses from the evaporative canister.
    10.  
    11. On Cirrus, Stratus and Breeze models, perform the following:
      1. Disengage the electrical harness to the leak detection pump.
      2.  
      3. Remove the canister-to-mounting bracket push pin.
      4.  

    12.  
    13. On Sebring and Avenger coupes, remove the canister-to-fuel tank mounting fasteners.
    14.  
    15. Remove the evaporative canister from the fuel tank.
    16.  



    Click image to see an enlarged view

    Fig. Fig. 11: The EVAP canister is the square component to the right, on top of the fuel tank

    To install:
    1. Place the canister into correct position on top of the fuel tank.
    2.  
    3. If necessary, raise and safely support the vehicle, remove the front passenger's side wheel, then remove the splash shield.
    4.  
    5. If necessary, remove the battery from the vehicle.
    6.  
    7. Tag and disconnect all necessary vacuum lines.
    8.  
    9. Unfasten all retaining bolts and/or straps, then remove the canister from the vehicle.
    10.  
    11. Installation is the reverse of the removal procedure.
    12.  

    Leak Detection Pump (LDP)

    1995-97 vehicles except Sebring and avenger coupes

    See Figures 12, 13, 14 and 15

    The leak detection pump is located underneath the right front headlamp, behind the front fascia.

    1. Disconnect the negative battery cable remote connection located on the left strut tower.
    2.  
    3. Remove the 2 headlamp unit mounting screws.
    4.  
    5. Pull the headlamp assembly out of the vehicle and unplug the wiring harness. Remove the headlamp assembly.
    6.  
    7. Disconnect the vacuum hose from the leak detection pump.
    8.  



    Click image to see an enlarged view

    Fig. Fig. 12: Disconnect the vacuum line from the leak detection pump



    Click image to see an enlarged view

    Fig. Fig. 13: Loosening the EVAP canister attaching nuts

    1. Label and disconnect the EVAP canister hoses.
    2.  
    3. Remove the 3 EVAP canister-to-pump bracket retaining nuts.
    4.  
    5. Allow the canister to sit on the lower fascia.
    6.  
    7. Remove the 4 leak detection pump bracket bolts.
    8.  
    9. Remove the pump and bracket, as an assembly.
    10.  
    11. Remove the EVAP canister from the vehicle.
    12.  
    13. Remove the pump from the bracket.
    14.  



    Click image to see an enlarged view

    Fig. Fig. 14: Note the LDP bracket's mounting hole locations



    Click image to see an enlarged view

    Fig. Fig. 15: Components of the leak detection pump assembly

    To install:
    1. Set the EVAP canister on the lower front fascia.
    2.  
    3. Install the pump and bracket assembly to the body, then tighten the 4 retaining bolts.
    4.  
    5. Insert the EVAP canister into its bracket. Install and tighten the 3 retaining nuts.
    6.  
    7. Connect the vacuum hoses to the EVAP canister and leak detection pump.
    8.  
    9. Plug in the headlamp wiring harness. Install the headlamp assembly into position and tighten the 2 mounting screws.
    10.  
    11. Connect the negative battery cable.
    12.  
    13. Test the system using a DRB scan tool, or equivalent.
    14.  

    1998 vehicles except sebring and avenger coupes

    See Figure 16

    The leak detection pump is located at the rear of the vehicle, on top of the fuel tank assembly.

    1. Properly relieve the fuel system pressure, as described in Fuel System .
    2.  
    3. Disconnect the negative battery cable remote connection located on the left strut tower.
    4.  
    5. Safely raise and support the vehicle.
    6.  
    7. Remove the fuel tank assembly, as described in Fuel System .
    8.  
    9. Disconnect the purge and vent lines.
    10.  
    11. Disconnect the EVAP canister hoses.
    12.  
    13. Disengage the electrical connector at the leak detection pump.
    14.  
    15. Remove the push pin fastener from the EVAP canister bracket.
    16.  
    17. Remove the bracket and LDP.
    18.  
    19. Separate the LDP from the bracket.
    20.  



    Click image to see an enlarged view

    Fig. Fig. 16: Location of the Leak Detection Pump (LDP) near the EVAP canister, on top of the fuel tank

    To install:
    1. Install the leak detection pump onto the bracket.
    2.  
    3. Install the LDP and bracket assembly onto the fuel tank.
    4.  
    5. Install the EVAP canister onto the bracket and secure with the push pin.
    6.  
    7. Connect the LDP and canister vacuum lines.
    8.  
    9. Install the fuel tank assembly, as outlined in Fuel System . Connect the purge and vent lines.
    10.  
    11. Fasten the LDP and fuel pump wiring connectors.
    12.  
    13. Lower the vehicle.
    14.  
    15. Connect the negative battery cable.
    16.  
    17. Fill up the fuel tank and pressurize the system using a DRB scan tool or equivalent. Inspect for leaks.
    18.  

    Evaporative Emission/Duty Cycle EVAP/Proportional Purge Solenoid Valve

    See Figures 1, 2 and 3

    The Duty Cycle EVAP Purge solenoid is located in a bracket on the left side strut tower of all 1995-97 vehicles except the Sebring and Avenger coupes. The Proportional Purge solenoid is located behind the right headlamp assembly on all 1998 vehicles except Sebring and Avenger coupes. The Evaporative Emission Purge solenoid is located behind the right front fascia on the Sebring and Avenger coupes.

    1. Disconnect the negative battery cable.
    2.  
    3. Label and remove the vacuum and electrical harness connections from the purge solenoid valve.
    4.  
    5. Remove the solenoid and mounting bracket from the engine compartment.
    6.  
    7. Installation is the reverse of the removal procedure.
    8.  

     
    AutoZone Logo