Diagnostic Test

WARNING: This page is about a different car, the 2012 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DTC
NOTE:
Troubleshoot all other active NOx Sensor and DEF Dosing System related fault codes before this fault.
1. Turn the ignition on.
2. With the scan tool, select View DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2.
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
CHECK THE DIESEL EXHAUST FLUID
1. Turn the ignition off.
2. Collect a sample of diesel exhaust fluid from the system.
3. Visually inspect the fluid for signs of contamination or debris.
4. Test the quality of the fluid using litmus paper (supplied by parts) or by using the SPX DEF/UREA Refractometer 94-F-00K-108-456 or equivalent.
  NOTE:
  The diesel exhaust fluid should register approximately 9 ph with the litmus paper and 32.5 percent using a refractometer.
  
  Is the diesel exhaust fluid quality within specification and free of debris and contamination?
  
  Yes
  - Go To 3.
  No
  - Drain the diesel exhaust fluid from the tank and fill the system. If the fluid is contaminated, follow the cleaning procedure. Refer to TANK, DIESEL EXHAUST FLUID, CLEANING .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK FOR DIESEL EXHAUST FLUID LEAK
1. Turn the ignition on.
2. With the scan tool, navigate to Systems Tests and actuate the DEF Prime Test.
  NOTE:
  This will pressurize the system, making a leak easier to see.
3. Inspect for signs of a Diesel Exhaust Fluid leak at:
  - DEF Tank connectors.
  - DEF Injector and Injector connectors.
  - DEF Heater Lines.
  - DEF Supply Pump Assembly.
  NOTE:
  Diesel exhaust fluid will form white deposits around leaky fittings.
  
  Were any leaks found?
  
  Yes
  - Repair or replace the faulty component in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 4.
CHECK THE EXHAUST SYSTEM FOR LEAKS
1. Visually inspect the entire exhaust system for signs of a leak.
  Were any exhaust leaks found?
  
  Yes
  - Perform the appropriate repair.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 5.
CHECK FOR DEPOSITS IN THE DECOMPOSITION TUBE
1. Remove the DEF Injector from the Decomp Tube. Refer to INJECTOR, DIESEL EXHAUST FLUID, REMOVAL .
2. Visually inspect the Decomp Tube for diesel exhaust fluid deposits.
  Were any deposits found?
  
  Yes
  - Clean the deposits from the Decomp Tube.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 6.
CHECK THE DEF INJECTOR OPERATION
1. Reconnect the DEF Injector harness connector.
2. Place the DEF Injector in a container to capture the fluid sprayed.
3. Turn the ignition on.
4. With the scan tool, navigate to Systems Tests and actuate the Diesel Exhaust Fluid Doser Pump Override Test.
  NOTE:
  This Test will run for six minutes before timing out. The amount of flow may fluctuate through out the test, therefore the test must be allowed to run completely in order for the results to be accurate. The fluid should spray out as a mist. There should be no dripping from the holes in the DEF Injector at any time during the duration of the test procedure.
5. Measure the amount of fluid sprayed after the test times out
  Does the fluid sprayed measure between 85 ml and 115 ml?
  
  Yes
  - Replace the SCR Catalyst in accordance with the service information. Refer to CATALYST, SELECTIVE CATALYTIC REDUCTION (SCR), REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Replace the DEF Supply Pump Assembly Filter in accordance with the service information. Refer to FILTER, DIESEL EXHAUST FLUID, REMOVAL . Perform the Diesel Exhaust Fluid Doser Pump Override Test again. If the system passes, then the repair is complete. If the system fails the test again, replace the DEF Supply Pump Assembly in accordance with the service information. Refer to ASSEMBLY, DIESEL EXHAUST FLUID PUMP, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .