Diagnostic Test

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

CHECK FOR AN ACTIVE CONDITION
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.

NOTE:
Diagnose and repair a Purge Solenoid circuit DTC before continuing with this test procedure.

NOTE:
Diagnose and repair any 5-Volt Reference DTCs before continuing with this test.
1. Turn the ignition on.
2. With the scan tool, read the ESIM Switch state.
  Is the ESIM Switch closed indicating a vacuum in the system?
  
  Yes
  - Go To 2
  No
  - Go To 3
CHECK FOR A BLOCKAGE BETWEEN THE PURGE SOLENOID AND THE FUEL TANK
1. Turn the ignition off.
2. Remove the vacuum line from the outlet port of the Purge Solenoid (this is the line that leads to the Evaporative Canister).
3. Turn the ignition on.
  Does the ESIM Switch state change from closed to open?
  
  Yes
  - Go To 4
  No
  - Repair the restriction between the Purge Solenoid and the ESIM.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . .
CHECK FOR A BLOCKAGE BETWEEN THE PURGE SOLENOID AND THE ESIM
1. Start the engine.
2. Allow the vehicle to idle long enough for the Purge Solenoid to cycle on.
  NOTE:
  With the scan tool, view the duty cycle of the Purge Solenoid on the Data Display to ensure that the Purge Solenoid has turned on.
  
  NOTE:
  Normally, the ESIM Switch should display as closed on the scan tool.
3. Remove the Fuel Filler Cap (if equipped) or open the Capless Fuel Filler flap.
  NOTE:
  The ESIM Switch should display as open.
  
  Do the ESIM Switch readings change as described above?
  
  Yes
  - Go To 4
  No
  - Repair the restriction between the Purge Solenoid and the ESIM.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . .
CHECK THE VACUUM SUPPLY AT THE OUTLET OF THE PURGE SOLENOID
1. Turn the ignition off.
2. Disconnect the Purge Tube from the outlet of the Purge Solenoid.
3. Connect a vacuum gauge to the outlet port of the Purge Solenoid.
4. Start the engine and allow it to idle long enough for the Purge Solenoid to cycle on.
5. Check vacuum supply at the Purge Solenoid outlet port.
  Is engine vacuum present?
  
  Yes
  - Go To 6
  No
  - Go To 5
CHECK THE VACUUM SUPPLY AT THE INLET OF THE PURGE SOLENOID
1. Check the vacuum supply to the Purge Solenoid.
  Is engine vacuum present?
  
  Yes
  - Verify that there is good pin to terminal contact in the solenoid and PCM harness connectors. Replace the Purge Solenoid if no problems were found in the connectors.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . .
  No
  - Repair the cause of loss of vacuum (broken or pinched vacuum supply line or obstruction in the vacuum port).
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . .
CHECK THE (K859) FUEL TANK PRESSURE (FTP) SENSOR 5-VOLT SUPPLY CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the FTP Sensor harness connector.
3. Turn the ignition on.
4. Measure the voltage between ground and the (K859) FTP Sensor 5-Volt Supply circuit at the FTP Sensor harness connector.
  Is the voltage between 4.9 to 5.1 volts?
  
  Yes
  - Verify that there is good pin to terminal contact in the Fuel Tank Pressure Sensor connector. If no problems were found with the connector, replace the Fuel Tank Pressure Sensor in accordance with the Service Information. Refer to SENSOR, FUEL TANK PRESSURE, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . .
  No
  - Repair the (K859) Fuel Tank Pressure Sensor 5-Volt Supply circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . .