Diagnostic Test

WARNING: This page is about a different car, the 2015 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

DTC IS ACTIVE
NOTE:
If DTCs P208A, P208C, or P208D are present, perform the Diagnostics for those DTCs before continuing with this one.

NOTE:
If there are any other DEF Supply Pump DTCs present, perform the Diagnostics for those DTCs before continuing with this one.

NOTE:
Inspect the Diesel Exhaust Fluid before continuing with this Diagnostic Tree. If there is evidence of contamination or degraded fluid; Perform the Diagnostic and Testing - Diesel Exhaust Fluid procedure.

Refer to DIESEL EXHAUST FLUID EMISSIONS, DIAGNOSIS AND TESTING .

Ignition on, engine not running.
1. With the scan tool, erase DTCs in the PCM.
2. Start the engine and allow the engine to reach normal operating temperature.
  NOTE:
  It may be necessary to test drive the vehicle to activate the SCR system.
3. Monitor the scan tool for at least two minutes.
4. With the scan tool, select View DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .
CHECK THE DEF PUMP SUPPLY LINES FOR LEAKS
1. Turn the ignition off.
2. Visually inspect the DEF Pump Supply lines for leaks.
  Are there any leaks present?
  
  Yes
  - Repair the DEF Pump Supply line(s) that are leaking. Reset the SCR Timer: Using the scan tool, go to Misc. Functions>SCR Extend Mileage W Active Fault (and reset the Timer). Also, test drive the vehicle for 30 miles before beginning the PCM VERIFICATION Test. Then, begin this Diagnostics again starting with the 'DTC IS ACTIVE' Test Step.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Go To 3
CHECK THE DEF INJECTOR
1. Turn the ignition off.
2. Remove the DEF Injector and place in a clean container.
3. Turn the ignition on.
4. With the scan tool, navigate to Systems Tests and actuate the DEF Injector Quantity Test.
  NOTE:
  When the DEF Injector (Dosing Valve) Actuator Test is initiated, the DEF Injector is opened. Wait 30 seconds before checking for leaks.
5. Check the DEF Injector for a leak.
  Is the DEF Injector leaking?
  
  Yes
  - Replace the DEF Injector. Reset the SCR Timer: Using the scan tool, go to Misc. Functions>SCR Extend Mileage W Active Fault (and reset the Timer). Also, test drive the vehicle for 30 miles before beginning the PCM VERIFICATION Test.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Go To 4
DEF PUMP
1. Replace the DEF Pump in accordance with the service information.
2. Ignition on, engine not running.
3. With the scan tool, erase DTCs in the PCM.
4. Start the engine.
5. Allow the engine to reach normal operating temperature.
6. Monitor the scan tool for at least two minutes.
7. With the scan tool, select View DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go To 5
  No
  - Test Complete. Reset the SCR Timer: Using the scan tool, go to Misc. Functions>SCR Extend Mileage W Active Fault (and reset the Timer). Also, test drive the vehicle for 30 miles before beginning the PCM VERIFICATION Test.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
POWERTRAIN CONTROL MODULE
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the DEF Pump and the Powertrain Control Module.
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. Perform any Technical Service Bulletins that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary. Reset the SCR Timer: Using the scan tool, go to Misc. Functions>SCR Extend Mileage W Active Fault (and reset the Timer). Also, test drive the vehicle for 30 miles before beginning the PCM VERIFICATION Test.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Replace the Powertrain Control Module in accordance with the service information. Reset the SCR Timer: Using the scan tool, go to Misc. Functions>SCR Extend Mileage W Active Fault (and reset the Timer). Also, test drive the vehicle for 30 miles before beginning the PCM VERIFICATION Test.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .