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.

DTC IS ACTIVE
NOTE:
If there are any DEF Supply Pump 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 Powertrain Control Module (PCM).
3. Start the engine and allow it to reach normal operating temperature.
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 (K428) DEF INJECTOR POSITIVE CIRCUIT FOR A SHORT TO GROUND
1. Turn the Ignition off.
2. Disconnect the DEF Injector harness connector.
3. Disconnect the PCM C2 harness connector.
4. Measure the resistance between ground and the (K428) DEF Injector Positive circuit at the DEF Injector harness connector.
  Is the resistance above 10k Ohms?
  
  Yes
  - Go To 3
  No
  - Repair the (K428) DEF Injector Positive circuit for a short to ground.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
DEF INJECTOR
1. Turn the ignition off.
2. Replace the DEF Injector in accordance with the service information.
3. Reconnect the DEF Injector harness connector.
4. Reconnect the PCM C2 harness connector.
5. Turn the ignition on.
6. With the scan tool, erase PCM DTCs.
7. Start the engine and allow it to reach normal operating temperature.
8. Test drive the vehicle under all normal conditions.
9. With the scan tool, read PCM DTCs.
  Does the scan tool display this DTC?
  
  Yes
  - Replace the Powertrain Control Module in accordance with the service information. Refer to REMOVAL .
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Test complete.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .