Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

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 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 fuel filler cap could caused this DTC to set. Make sure the fuel filler 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 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 INTERMITTENT CONDITION diagnostic procedure. Refer to STANDARD PROCEDURE .
CHECK THE FUEL TANK PRESSURE (FTP) SENSOR 5-VOLT SUPPLY CIRCUIT FOR AN OPEN/HIGH RESISTANCE
NOTE:
Diagnose and repair any system voltage or sensor supply voltage DTC's before continuing with this test.

Turn the ignition off.
1. Disconnect the FTP Sensor harness connector.
2. Ignition on, engine not running.
3. Measure the voltage on the FTP Sensor 5-Volt Supply circuit at the FTP Sensor harness connector.
  Is the voltage between 4.8 to 5.2 volts?
  
  Yes
  - Go To 4
  No
  - Repair the Fuel Tank Pressure Sensor 5-Volt Supply circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
FUEL TANK PRESSURE (FTP) SENSOR
1. Turn the ignition off.
2. Reconnect the FTP Sensor harness connector.
3. Remove the fuel filler cap.
4. Turn the ignition on, engine not running.
5. With a voltmeter, back probe the FTP Sensor 5-Volt Supply circuit at the FTP Sensor harness connector.
  Is the voltage between 2.3 and 2.7 volts?
  
  Yes
  - Go To 5
  No
  - Verify that there is good pin to terminal contact in the Fuel Tank Pressure Sensor and Powertrain Control Module connectors. If no problems were found with the connectors, replace the Fuel Tank Pressure Sensor according to the service information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
EVAP SYSTEM INSPECTION
1. Visually and physically Inspect the entire Evaporative Emission System for any of the following conditions:
  - Holes or cracks
  - Loose seal points
  - Damaged or missing components
  - Incorrect routing of hoses and tubes
  - Loose or missing Fuel Filler Cap or seal
  - Damaged locking tabs on the Fuel Filler Cap and/or filler tube
  - Damaged seal points on the Fuel Filler Cap and/or filler tube
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 6
INSUFFICIENT VACUUM SUPPLY TO THE EVAP PURGE SOLENOID
1. Inspect the Evap Purge Solenoid vacuum supply hose for proper routing and installation.
2. Make sure the vacuum supply hose between the throttle body or intake manifold and the Evap Purge Solenoid is free from any obstructions or blockage.
3. Make sure the vacuum port at the throttle body or intake manifold is free from any obstructions or blockage.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 7
EVAP PURGE HOSE/TUBE OBSTRUCTION
1. Inspect the Evap Purge hose/tube for proper routing and installation between the Evap Purge Solenoid and the Fuel Tank and between the Fuel Tank and the Evap Purge Canister.
2. Make sure the hose/tube is not damaged or kinked and is free from any obstructions or blockage.
  Were any problems found?
  
  Yes
  - Repair or replace as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 8
EVAP PURGE SOLENOID
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.

NOTE:
After disconnecting the Evap Purge Solenoid vacuum connections, inspect the lines and solenoid for signs of contamination.
1. Disconnect the vacuum hoses at the Evap Purge Solenoid.
2. Using a hand vacuum pump, apply 10 in. Hg. to the "CAN" side of the Evap Purge Solenoid.
  NOTE:
  The solenoid should hold vacuum for a minimum of 15 seconds.
3. Turn the ignition on.
4. Using the scan tool, actuate the Evap Purge Solenoid to the ON position.
  NOTE:
  The vacuum should drop when the solenoid is actuated.
  
  Does the solenoid function as described above?
  
  Yes
  - Go To 9
  No
  - Verify that there is good pin to terminal contact in the solenoid and PCM harness connectors. Replace the Evap Purge Solenoid if no problems were found in the connectors.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors 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
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace and program the Powertrain Control Module (PCM) in accordance with the service information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .