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Home >> Dodge and Ram >> 2018 >> Durango Pursuit >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 18 (3.6L - DTCS P0344 To P0573) >> DTC Troubleshooting >> P0455-EVAP System Large Leak >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  1. CHECK FOR ANY SERVICE BULLETINS THAT APPLY 
    1. Before proceeding with this test procedure, perform any Service Bulletins or PCM Flash updates that relate to this fault code.

      Are there any Service Bulletins or PCM Flash updates available?

      Yes 

      • Perform the applicable Service Bulletins or PCM Flash update.
      • Verify the system is not leaking by performing the ESIM Forced Monitor Test.

      No 

      • Go To  2
  2. CHECK FOR AN ACTIVE CONDITION 
    1. Turn the ignition on.
    2. With 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.
      NOTE:

      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  3

      Failed 

      • Go To  4
  3. EVAP SYSTEM INSPECTION 
    1. Turn the ignition off.
      NOTE:

      The leak size may not be large enough to repeatedly fail Large leak.

    2. Perform a visual inspection for:
      • 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.

      Were any problems found?

      Yes 

      No 

      • The condition that caused this fault is either not present at this time or the leak size is not large enough to repeatedly fail Large leak. Perform the P0456-EVAP SYSTEM SMALL LEAK DTC diagnostic procedure to verify the system is not leaking.
  4. EVAPORATIVE EMISSION LEAK DETECTION 
    1. To continue testing you will need the (special tool #8404C, Kit, EELD And Accessory).
    2. Connect the red power lead of the EELD to the Battery positive terminal and the black ground lead to Battery negative terminal.
    3. Connect shop air to the EELD.
    4. Connect the service adapter (special tool #8404-ADP, Smoke Machine Adapters) to the ESIM Switch.
    5. Connect the SMOKE supply tip (black hose) to the adapter.
    6. Set the smoke/air control switch to SMOKE.
      NOTE:

      The flow meter indicator ball will not move in the smoke mode.

    7. Press the remote smoke/air start button.
      NOTE:

      Make sure that smoke has filled the EVAP System by continuing to press the remote smoke/air start button, remove the vehicle fuel cap (if applicable) or open the flap (capless), and wait for the smoke to exit. Once smoke is indicated reinstall the fuel cap or close the flap.

      NOTE:

      For optimal performance, introduce smoke into the system for an additional 60 seconds; continue introducing smoke at 15 second intervals, as necessary.

    8. While still holding the remote smoke/air start button, use the white light (special tool #8404-CLL, Light, White) 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) black light (special tool #8404-UVL, Light, UV) and the yellow goggles (special tool #8404-20, Goggles, Yellow) to look for residual traces of dye that is left behind by the smoke.
    10. The exiting smoke deposits a residual fluid that is either bright green, yellow or purple in color when viewed with a UV light.
      NOTE:

      Carefully inspect the vent side of the EVAP Canister. Due to the filtering system in the canister the smoke may not be as thick. Introducing smoke into the filtered side of the canister may assist in locating the leak.

    11. Disconnect the vacuum hose that connects to the Intake Manifold side of the Purge Solenoid and check for smoke coming through the Purge Solenoid.

      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 EVAP 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. Verify that the system is not leaking by performing the ESIM Forced Monitor Test over again.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No leaks were detected; 

      • Replace the ESIM Switch in accordance with the Service Information. Verify that the system is not leaking by performing the ESIM Forced Monitor Test over again.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
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