Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DTC
NOTE:
If DTCs P018B, P018C, P018D, P025A, P025B, P025C, P025D, P0627, P0628, P0629, P1205, P1206, P1DBD, or U0109 are present, repair that DTC before proceeding with this test.
1. Turn the ignition on.
2. Using the scan tool, read DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to STANDARD PROCEDURE .
CHECK THE VARIABLE SPEED FUEL PUMP MODULE VARIABLE AND DESIRED PRESSURE
1. Let the engine run until it reaches normal operating temperature.
2. Using the scan tool, go to the PCM Data section and read the Variable Speed Fuel Pump Actual Rail Pressure and the Desired Rail Pressure.
  Is the pressure difference >10 psi?
  
  Yes
  - Perform the diagnostic procedure for CHECKING THE FUEL DELIVERY SYSTEM. Refer to DIAGNOSIS AND TESTING .
  No
  - Replace the Powertrain Control Module in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .