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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 717 (5.7L CNG - DTCS P0204 To P0606 - 2500 Hd) >> Diagnosis And Testing >> P0455-EVAP System Large Leak >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR AN ACTIVE CONDITION 
    1. Turn the ignition on.
    2. Using the scan tool, navigate to System Test and start the ESIM Forced Monitor Test. Allow the test to run until finished.
    3. Read the Large Leak test results.
    4. This is a test of the overall operation of the evaporative system components. It does not necessarily indicate that a large leak was the failure.

      Did the Large Leak test pass or fail?

      Passed 

      • Go To  2

      Failed 

      • Go To  3
  2. EVAP SYSTEM INSPECTION 
    NOTE:

    A hot vehicle may conceal a potential leak. For best results, allow the vehicle to cool to ambient temperature before continuing with this procedure.

    1. Turn the ignition off.
    2. Perform a visual inspection of the entire Evaporative Emission System for any of the following conditions:
    • Proper orientation of the ESIM Switch connector (3 O'clock position)
      • If the switch is not in the proper orientation, it may cause the weighted pressure and vacuum vents to intermittently not seal correctly.
    • Holes or cracks
    • Loose seal points
    • Damaged or missing components
    • Incorrect routing of hoses and tubes
    • Loose or missing Fuel Filler Cap (if applicable) or seal
    • Damaged seal points on the Fuel Filler Cap (if applicable) or Capless Fuel Filler Assembly

      Were any problems found?

      Yes 

      No 

      • Testing complete. The condition that caused the fault is not present at this time.
  3. EVAPORATIVE EMISSION LEAK DETECTION 
    WARNING: Keep lit cigarettes, sparks, flames, and other ignition sources away from the test area to prevent the ignition of explosive gases. Keep the test area well ventilated. Failure to do so may result in possible serious or fatal injury.
    1. To continue testing, you will need the Evaporative Emissions Leak Detector (EELD) and Accessory Kit Kit, EELD And Accessory 84074C
      NOTE: The fuel tank should have less than 88% of the fuel tank capacity to properly test the Evap system.
    2. Connect the red power lead of EELD to the battery positive terminal and the black ground lead to battery negative terminal.
    3. Connect shop air to the EELD.
    4. Remove the Vent Filter and install the appropriate Smoke Machine Adapters 8404-ADP into the vent line.
    5. Connect the SMOKE supply tip (black hose) to the adapter.
    6. Set the smoke/air control switch to SMOKE.
    7. Press and hold the remote smoke/air start button to allow the system to fill with smoke.
    8. While still holding the remote smoke/air start button, use the White Light 8404-CLL to follow the Evap system path, and look for the source of the leak indicated by exiting smoke.
    9. If a leak is concealed from view (i.e., top of fuel tank), release the remote smoke/air start button, and use the Ultraviolet (UV) Light 8404-UVL and the Yellow Goggles 8404-20 to look for residual traces of dye that are left behind by the smoke.
      NOTE: The exiting smoke deposits a residual fluid that is either bright green or bright yellow in color when viewed with a UV light.

      Select the appropriate response from the list below:

      A leak was found at the Fuel Cap (if applicable) or Fuel Filler Tube Assembly

      • Perform the appropriate repair by replacing the Fuel Filler Tube Assembly and/or the Fuel Cap (if applicable).
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      A leak was found in the Evaporative System

      • If the leak is at a hose connection, remove the hose then reconnect the hose and check for a leak again. All other leaks, repair as necessary.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No leaks were detected 

      • Go To  4
  4. EVAP PURGE SOLENOID 
    1. Disconnect the vacuum hose that connects to the Intake Manifold at the Evap Purge Solenoid.
      NOTE:

      After disconnecting the Evap Purge Solenoid vacuum connection, inspect the line and solenoid for signs of contamination.

    2. Check for smoke coming through the Purge Solenoid
      NOTE: The solenoid should be sealed with the ignition off.

      Is there smoke leaking passed the Purge Solenoid?

      Yes 

      • Verify that there is good pin to terminal contact in the EVAP Purge Solenoid and PCM harness connectors. Replace the EVAP Purge Solenoid in accordance with the service information if no problems were found in the connectors.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Verify that there is good pin to terminal contact in the ESIM Switch and PCM harness connectors. Replace the ESIM Switch in accordance with the service information if no problems were found in the connectors.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
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