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.

OTHER DTCs
1. With the scan tool, read DTCs.
  Are any other injector/fuel pressure related DTCs present?
  
  Yes
  - Troubleshoot other injector/fuel pressure related DTCs first.
  No
  - Go To 2
CHECK THE FUEL DELIVERY SYSTEM
1. Perform the CHECKING THE FUEL DELIVERY SYSTEM procedure. Refer to DIAGNOSIS AND TESTING, 6.7L .
  Did vehicle pass the CHECKING THE FUEL DELIVERY SYSTEM TEST?
  
  Yes
  - Go To 3
  No
  - Perform the appropriate repair.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE FUEL RETURN LINE
1. Check the Fuel Return line between the Fuel Filter housing and the Fuel Tank for a kink, blockage, or other damage.
  Was there any blockage or other damage found?
  
  Yes
  - Perform the appropriate repair.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 4
FUEL CONTROL ACTUATOR
1. Check for a mechanically stuck Fuel Control Actuator (FCA). Using the scan tool, actuate the HPCR Duty Cycle Output.
  NOTE:
  The Fuel Control Actuator will only click when cycled off.
  
  Do you hear a click from the Fuel Control Actuator when you cycle the actuator off with the scan tool?
  
  Yes
  - Go To 5
  No
  - Replace the Fuel Control Actuator in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK VALVE DAMAGED OR BLOCKED
1. Check the fuel drain line check valve in the rear of the cylinder head for signs of damage, blockage, or debris.
  Is the check valve damaged or blocked?
  
  Yes
  - Repair the cause of the damaged or blocked check valve or replace the valve.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 6
FUEL RAIL PRESSURE SENSOR
1. Using the scan tool, monitor the fuel pressure reading from the Fuel Rail Pressure Sensor at idle and at 2000 RPM.
  Is the fuel rail pressure reading higher at 2000 RPM than at idle?
  
  Yes
  - Repair Complete.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Replace the Fuel Rail Pressure Sensor in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .