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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 738 (6.7L Diesel - DTCS P1241 To P2281 - 2500 Hd, 3500 Hd) >> Diagnosis And Testing >> P1C54-SCR NOX Catalyst Missing >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 3500 HD and 2014 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. OTHER DEF SYSTEM DTCS PRESENT 
    1. Ignition on, engine not running.
    2. With the scan tool, View DTCs.

      Are there any NOx Sensor or DEF System DTCs active?

      Yes 

      • Repair all other DTCs before proceeding with this test procedure.

      No 

      • Go To  2
  2. 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 DEF using the DEF/UREA Refractometer 94-F-OOK-108-456 available through Pentastar Service Equipment (PSE).
      NOTE:

      The DEF should register approximately 32.5 percent using a refractometer.

    5. To test for hydrocarbons in the DEF tank use hydroscopic test paper (PSE part number. 223-44-863). The test strip come in contact with the DEF fluid in the tank in order to get a valid reading for hydrocarbons present in tank
    6. Remove the oil/hydrocarbon detection paper from packing, inspect for color consistency. If color is not consistent replace strip.
    7. Disconnect the DEF fill pipe from tank and try to get a sample or remove the DEF tank.
    8. Place the detection paper directly into the DEF fluid in the tank. If the light blue paper turns dark blue, oil or hydrocarbon contamination exist.

      Is the diesel exhaust fluid quality within specification and free of debris and contamination?

      Yes 

      • Go To  3

      No 

      • Drain the Diesel Exhaust Fluid. Replace the DEF Tank, DEF Supply Pump Assembly, DEF Supply Tube, DEF Filler Tube, and DEF Filler Cap in accordance with the service information.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  3. CHECK THE DIESEL EXHAUST FLUID SYSTEM FOR EXTERNAL LEAKS 
    1. Visually inspect the DEF system for signs of external leaks.
      NOTE:

      Diesel exhaust fluid will form white deposits around leaky fittings.

      Were any leaks found?

      Yes 

      • Go To  4

      No 

  4. CHECK THE EXHAUST SYSTEM FOR LEAKS 
    1. Visually inspect the exhaust system between the Turbocharger outlet and the SCR Catalyst outlet for signs of loose or leaking connections or damaged components

      Were any leaks or damage found?

      Yes 

      No 

      • Go To  5
  5. CHECK THE DECOMPOSITION TUBE FOR DIESEL EXHAUST FLUID DEPOSITS 
    1. Remove the DEF Injector. Refer to INJECTOR, DIESEL EXHAUST FLUID, REMOVAL .
    2. Visually inspect the Decomposition Tube for signs of diesel exhaust fluid crystals or deposits.

      Were any deposits found?

      Yes 

      No 

      • Go To  6
  6. CHECK THE DEF INJECTOR 
    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 

      No 

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