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.

ACTIVE DTC
1. Turn the ignition on, engine not running.
2. With the scan tool, navigate to Systems Tests and actuate the Diesel Exhaust Fluid Doser Pump Override Test.
3. With the scan tool, View DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION - 6.7L 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 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 .
CHECK FOR THE DEF SUPPLY PUMP MOTOR A SUPPLY CIRCUIT SHORTED TO ANOTHER CIRCUIT
1. Turn the ignition off.
2. Disconnect the DEF Supply Pump Assembly harness connector.
3. Disconnect the DEF Dosing Control Unit C2 harness connector.
4. Measure the resistance between and the DEF Supply Pump Motor A Supply circuit and all other circuits at the DEF Dosing Control Module C2 harness connector.
  Is the resistance above 10k Ohms between the DEF Supply Pump Motor A Supply circuit and all other circuits?
  
  Yes
  - Go To 4
  No
  - Replace the DEF Tank Harness in accordance with the service information.
    Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK FOR THE DEF SUPPLY PUMP MOTOR B SUPPLY CIRCUIT SHORTED TO ANOTHER CIRCUIT
1. Measure the resistance between and the DEF Supply Pump Motor B Supply circuit and all other circuits at the DEF Dosing Control Unit C2 harness connector.
  Is the resistance above 10k Ohms between the DEF Supply Pump Assembly Return circuit and all other circuits?
  
  Yes
  - Go To 5
  No
  - Replace the DEF Tank Harness in accordance with the service information.
    Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK FOR THE DEF SUPPLY PUMP MOTOR C SUPPLY CIRCUIT SHORTED TO ANOTHER CIRCUIT
1. Measure the resistance between and the DEF Supply Pump Motor C Supply circuit and all other circuits at the DEF Dosing Control Unit C2 harness connector.
  Is the resistance above 10k Ohms between the DEF Supply Pump Motor C Supply circuit and all other circuits?
  
  Yes
  - Go To 6
  No
  - Replace the DEF Tank Harness in accordance with the service information.
    Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE DEF DOSING CONTROL UNIT
1. Reconnect the DEF Dosing Control Unit C2 harness connector. Leave the DEF Supply Pump Assembly harness connector disconnected.
2. Turn the ignition on.
3. With a scan tool, View DTCs.
  Did DTC P208A become active and DTC P208D change to stored with the DEF Supply Pump Assembly harness connector disconnected?
  
  Yes
  - 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 - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Replace the DEF Dosing Control Unit in accordance with the service information. Refer to UNIT, DIESEL EXHAUST FLUID DOSING CONTROL, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .