Diagnostic Test

WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.

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.
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
EVAP SYSTEM INSPECTION
1. Turn the ignition off.
  NOTE:
  The leak size may not be large enough to repeatedly fail Large leak.
2. It is possible that the Fuel Filler Cap (if applicable) or Capless Fuel Filler Assembly was previously leaking. Perform a visual inspection for:
  - Damaged seal points on the Fuel Filler Cap (if applicable) or Capless Fuel Filler Assembly
  - 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
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Testing complete. The condition that caused this fault is either not present at this time or the leak size is not be large enough to repeatedly fail Large leak. If the P0456-EVAP SYSTEM SMALL LEAK DTC is also set, perform the diagnostics for P0456. Refer to P0456-EVAP SYSTEM SMALL LEAK .
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 (special tool #8404C, Kit, EELD And Accessory).
  NOTE:
  The fuel tank should have less than 95% 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. Connect the appropriate Smoke Machine Adapter (special tool #8404-ADP, Smoke Machine Adapters) to the ESIM.
  NOTE:
  If not connecting the EELD to the ESIM, the vent must be capped or plugged. The pressure developed by the EELD will over come the weights in the ESIM, causing the vent seal to open allowing the system to vent. This could lead to a false failure condition.
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 (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) 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 are left behind by the smoke.
  NOTE:
  The exiting smoke deposits a residual fluid that is either bright green, yellow or purple 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
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
  - Replace the EVAP Purge Solenoid in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - If the system failed the ESIM Forced monitor test in step one, a leak is present but was not found during testing. Perform system leak test found in step three over again. While performing test verify all system connection and seal points. Inspect system lines for small cracks that may open with line movement.