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.

Other DTCS
1. Ignition On, Engine Not Running.
2. With The Scan Tool, Read DTCS.
  Are Any Other DTCS Active?
  
  Yes
  - Repair Other DTCS Before Proceeding.
  No
  - Go To 2
Check The Aftertreatment Doc/Dpf Canister For A Missing Doc
NOTE:
The Diesel Oxidation Catalyst (Doc) Is Located Inside The Canister Referred To As The Diesel Particulate Filter (Dpf)
1. Check The Aftertreatment Doc/Dpf Canister To See If The Doc Has Been Removed.
  Is The Doc Present Within The Doc/Dpf Canister?
  
  Yes
  - Go To 3
  No
  - Replace The Diesel Oxidation Catalyst (Doc) / Diesel Particulate Matter (Dpf) Assembly In Accordance With The Service Information. Refer To FILTER, DIESEL PARTICULATE, REMOVAL .
  - Perform The POWERTRAIN VERIFICATION TEST. Refer To POWERTRAIN VERIFICATION TEST .
Check For Exhaust Gas Temperature Sensor 1 And Exhaust Gas Temperature Sensor 2 Harness Connectors Reversed
NOTE:
Exhaust Gas Temperature Sensor (Egt) 1 Is Located At The Doc Inlet And Egt 2 Is Located At The Doc Outlet (The Middle Of The Doc/Dpf Canister).
1. Turn The Ignition Off.
2. Disconnect The Egt 1 Harness Connector.
3. Turn The Ignition On.
4. Using The Scan Tool, Monitor The Voltage Reading Of Egt Sensor 1 And Egt Sensor 2.
  Does The Diesel Voltage Value Change To 5.0 Volts For Egt Sensor 1 Or Egt Sensor 2?
  
  Egt Sensor 1
  - Go To 4
  Egt Sensor 2
  - The Harness Connectors Are Reversed. Disconnect Egt Sensor 2 And Switch The Harness Connectors To The Correct Sensors.
  - Perform The POWERTRAIN VERIFICATION TEST. Refer To POWERTRAIN VERIFICATION TEST .
Check For An Exhaust Leak
1. Perform The CHECKING THE EXHAUST SYSTEM FOR LEAKS Diagnostic Procedure. Refer To CHECKING THE EXHAUST SYSTEM FOR LEAKS .
  Are Leaks Found?
  
  Yes
  - Repair Or Replace As Necessary.
  - Perform The POWERTRAIN VERIFICATION TEST. Refer To POWERTRAIN VERIFICATION TEST .
  No
  - Go To 5
Check The Exhaust Temperature
1. With The Scan Tool, Read Egt Sensors 1, 2, And 3 To Determine The Exhaust Temperature.
  Is The Temperature Reading Above 225°F?
  
  Yes
  - Go To 6
  No
  - Go To 7
Compare The Rationality Of Egt Sensors 1, 2, And 3
1. Start The Engine.
2. Raise The Engine Speed To 2500 Rpm For Two Minutes.
  Do The Temperature Readings Of Egt Sensors 1, 2, And 3 Change In Value At Least 5°F?
  
  Yes
  - Go To 8
  No
  - Replace The Exhaust Gas Temperature (Egt) Sensor That Did Not Change In Value By At Least 5°F Or Is Not Updating.
  - Perform The POWERTRAIN VERIFICATION TEST. Refer To POWERTRAIN VERIFICATION TEST .
Compare The Rationality Of Egt Sensors 1, 2, And 3
1. Start The Engine And Allow It To Idle For 10 Minutes.
2. With The Scan Tool, Read The Values Of Egt Sensors 1, 2, And 3.
  Do All Three Egt Sensors Read Above 150°F And Are The Values Of The Temperature Sensors Updating?
  
  Yes
  - Go To 8
  No
  - Replace The Exhaust Gas Temperature (Egt) Sensor That Is Not Above 150°F Or Is Not Updating On The Scan Tool.
  - Perform The POWERTRAIN VERIFICATION TEST. Refer To POWERTRAIN VERIFICATION TEST .
Check The Charge Air Cooling System For Contamination Damaging The Aftertreatment Diesel Oxidation Catalyst
1. Separate The Exhaust Plumbing From The Turbocharger Outlet.
2. Inspect For Signs Of Oil, Coolant Or Fuel Being Introduced Into The Aftertreatment System From The Engine Or Signs Of Moisture In The Turbocharger Exhaust Outlet.
  Is Contamination Found In The Turbocharger Exhaust Outlet?
  
  Yes
  - Identify And Repair The Source Of The Contamination Within The Engine And Replace The Aftertreatment Doc/Dpf After The Engine Failure Has Been Repaired.
  - Perform The POWERTRAIN VERIFICATION TEST. Refer To POWERTRAIN VERIFICATION TEST .
  No
  - Go To 9
Inspect The Aftertreatment Doc/Dpf, And Egt Sensors 1, 2, And 3 For Damage, Debris Or Missing
NOTE:
The Diesel Oxidation Catalyst (Doc) Is Located Inside The Canister Referred To As The Diesel Particulate Filter (Dpf)
1. Remove The Aftertreatment Doc/Dpf And Exhaust Gas Temperature Sensors To Inspect For Damage Or Presence Of Face Plugging.
  Are The Components Found To Be Missing, Plugged Or Damaged During The Inspection Of The Aftertreatment Doc, Aftertreatment Dpf, And Temperature Sensors?
  
  Yes
  - Replace Or Repair Damaged Component(S).
  - Perform The POWERTRAIN VERIFICATION TEST. Refer To POWERTRAIN VERIFICATION TEST .
  No
  - Perform The INTERMITTENT CONDITION Diagnostic Procedure. Refer To INTERMITTENT CONDITION .