Diagnostic Test

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
NOTE:
Diagnose and repair any EGR Valve Position Sensor or EGR Valve control circuit DTCs before continuing with this test procedure.

NOTE:
Diagnose and repair any 5-Volt Reference DTCs before continuing with this test procedure.
1. Start the engine and allow it to reach operating temperature.
2. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
3. With the scan tool, read DTCs and record on the repair order.
  Is the DTC active or pending?
  
  Yes
  - Go To 3
  No
  - Go To 2
CHECK THE VEHICLE'S REPAIR HISTORY
1. Check the history of the vehicle for previous EGR Valve performance related DTCs within the past 90 days.
  Does the repair history show that the vehicle was in dealership for a EGR Valve performance fault within the past 90 days?
  
  Yes, and the EGR Valve was cleaned during the previous visit
  - Verify that the connector is completely connected. Check the connector terminals for any pushed out, corroded or spread terminals causing a poor or intermittent connection. If the connector is good, replace the EGR Valve Assembly in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  Yes, and the EGR Valve was replaced during the previous visit
  - Verify that the connector is completely connected. Check the connector terminals for any pushed out, corroded or spread terminals causing a poor or intermittent connection. If the connector is good, Clean the valve by running Mopar Combustion Chamber cleaner through the engine. Test drive the vehicle and verify the DTC does not return. If the fault does not return, check the engine for any fuel or air handling issues that can cause excessive soot or carbon buildup in the engine.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Test complete. Verify that the connector is completely connected. Check the connector terminals for any pushed out, corroded or spread terminals causing a poor or intermittent connection. The EGR Valve may have been carboned/sooted up temporarily. Clean the valve by running Mopar Combustion Chamber cleaner through the engine. Test drive the vehicle and verify the DTC does not return.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK THE (F856) 5-VOLT SUPPLY CIRCUIT VOLTAGE
1. Turn the ignition off.
2. Disconnect the EGR Valve harness connector.
3. Turn the ignition on.
4. Measure the voltage on the (F856) 5-Volt Supply circuit at the EGR Valve harness connector.
  Is the voltage between 4.9 and 5.1 volts?
  
  Yes
  - Go To 4
  No
  - Repair the (F856) 5-Volt Supply circuit for an open.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK THE EGR VALVE FOR CARBON OR SOOT BUILD UP
1. Turn the ignition off.
2. Remove the EGR Valve Assembly.
3. Visually inspect the EGR Valve stem, disc and passages for signs of damage or excessive carbon build up.
  Does the EGR Valve show signs of excessive carbon build up?
  
  Yes
  - Clean and reinstall the EGR Valve Assembly. Test drive the vehicle and verify the DTC does not return.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Replace the EGR Valve Assembly in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .