Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DTC
NOTE:
If there are any other NOx DTCs or DEF Injector DTCs present, perform the Diagnostics for those DTCs before continuing with this one.
1. Ignition on, engine not running.
2. With the scan tool, erase DTCs in the PCM.
3. Start the engine and allow the engine to reach normal operating temperature.
4. Monitor the scan tool for at least two minutes.
5. With the scan tool, select View DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION. Refer to INTERMITTENT DTC .
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 by using the DEF/UREA Refractometer 16-5025 or equivalent.
  NOTE:
  The diesel exhaust fluid should register approximately 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.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
CHECK FOR DIESEL EXHAUST FLUID LEAK
1. Turn the ignition on.
2. With the scan tool, navigate to Systems Tests and actuate the DEF Injector (Dosing Valve) Actuator 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 Injector and Injector connectors.
  - DEF Heater Line.
  - 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 PCM VERIFICATION TEST .
  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 PCM VERIFICATION TEST .
  No
  - Go To 5
CHECK THE DEF INJECTOR OPERATION
1. Place the DEF Injector in a container to capture the fluid sprayed.
2. Turn the ignition on.
3. With the scan tool, navigate to the Diesel Exhaust Fluid Injector Quantity Test.
  NOTE:
  This Test is broken up into three parts: 1-Air bleed/Build Pressure (about 30 seconds/then empty the container), 2-Main volume test (a little over one minute), 3-DEF purge (to remove excess fluid from the lines after the test). The entire procedure will run for 2-3 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.
4. Measure the amount of fluid sprayed after the test times out.
  Does the fluid sprayed measure between 29 ml and 33 ml?
  
  Yes
  - Replace the SCR Catalyst in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Replace the DEF Supply Pump Assembly in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .