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Diagnostic Test

WARNING: This page is about a different car, the 2010 Dodge Charger and 2010 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. VEHICLE HISTORY AND SERVICE BULLETIN INVESTIGATION 
    1. Turn the ignition on.
    2. Using the scan tool, read DTCs. Record the related Freeze Frame data if any DTCs are present.
    3. Check the following items which may assist in repairing the customer's complaint successfully:
      • Check the vehicle's repair history. If the vehicle has a repair history that pertains to the customer's current complaint, review the repair.
      • Inspect the vehicle for any aftermarket accessories that may have been installed incorrectly.
      • Check for any service bulletin(s) related to the customer's complaint or DTCs. If a service bulletin applies, follow the instructions of the service bulletin.

      Choose the following scenario that best applies:

      The vehicle inspection or service bulletin repaired the customer's complaint. 

      • Testing complete.

      A DTC is present, the vehicle inspection revealed no concerns, no service bulletins apply, or the service bulletin did not repair the customer's complaint. 

      • Go to step  2
  2. ACTIVE DTC 
    NOTE: Because a hot vehicle can conceal a potential leak, allow the vehicle to reach ambient temperature before continuing with this procedure.
    NOTE: A loose gas cap could caused this DTC to set. Make sure the gas cap is tight and in good condition.
    NOTE: If the customer is experiencing an early fuel shut off during the fuel filling process in addition to DTC P0440, P0441, or P0452, check for restrictions in the Evap Purge tubes/hoses as well as the Fresh Air Filter before continuing.
    1. Start the engine.
    2. Allow the engine to idle.
    3. Using the scan tool, perform the ESIM FORCED MONITOR TEST. Allow the test to complete.
    4. Using the scan tool, read DTCs.

      Is the DTC Active or Pending at this time?

      Yes 

      • Go to step  3

      No 

      • Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
      • Perform the CHECKING FOR AN INTERMITTENT DTC diagnostic procedure. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  3. ESIM SWITCH STATE 
    1. With a scan tool, read the ESIM Switch state.
    2. Disconnect the purge hose at the EVAP Canister.

      Does the ESIM Switch state change from 'Closed' to 'Open' when the purge hose was disconnected?

      Yes 

      • Go to step  4

      No 

      • Go to step  7
  4. EVAP PURGE HOSE/TUBE OBSTRUCTION 
    1. Inspect the EVAP Purge hose/tube between the EVAP Purge Solenoid and the Fuel Tank and between the Fuel Tank and the EVAP Purge Canister for proper routing and installation.
    2. Make sure the hoses and tubes are not damaged, kinked, or blocked.

      Were any problems found?

      Yes 

      No 

      • Go to step  5
  5. (K52) EVAP PURGE CONTROL CIRCUIT SHORTED TO GROUND 
    Fig 1: Checking EVAP Purge Control Circuit
    GC0097514Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the PCM harness connectors.
    3. Measure the resistance between ground and the (K52) EVAP Purge Control circuit in the EVAP Purge Solenoid harness connector.

      Is the resistance below 100 Ohms?

      Yes 

      No 

      • Go to step  6
  6. EVAP PURGE SOLENOID 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the EVAP Purge Solenoid and the PCM.
    2. Look for any chafed, pierced, pinched, or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals.
    4. Perform any Technical Service Bulletins that may apply.

      Were any problems found?

      Yes 

      No 

  7. ESIM SWITCH 
    1. With a scan tool, read the ESIM Switch state.
    2. Disconnect the ESIM Switch harness connector.

      Does the ESIM Switch state change from CLOSED to OPEN when the switch is disconnected?

      Yes 

      No 

      • Go to step  8
  8. (K107) ESIM SIGNAL CIRCUIT SHORTED TO GROUND 
    Fig 2: Checking ESIM Signal Circuit
    GC0090828Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the PCM harness connectors.
    3. Measure the resistance between ground and the (K107) ESIM Signal circuit in the ESIM Switch harness connector.

      Is the resistance below 100 Ohms?

      Yes 

      No 

      • Go to step  9
  9. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the EVAP Purge Solenoid and the Powertrain Control Module (PCM) and between the ESIM Switch and the PCM.
    2. Look for any chafed, pierced, pinched, or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals.
    4. Perform any Technical Service Bulletins that may apply.

      Were any problems found?

      Yes 

      No 

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