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 DTC P0627 is present, repair that DTC before proceeding with this test.
1. Ignition on, engine not running.
2. With the scan tool, select View DTCs.
  Is the DTC Active at this time?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to STANDARD PROCEDURE .
CHECK THE (N1) FPCM MOTOR FEED CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition on, engine off.
2. With the scan tool, begin the Variable Speed Fuel Pump Relay Actuation Test.
3. Disconnect the FPCM harness connector.
4. Measure the voltage on the (N1) FPCM Motor Feed circuit at the FPCM harness connector.
  Is the voltage above battery voltage?
  
  Yes
  - Repair the (N1) FPCM Motor Feed circuit for a short to voltage.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace the Fuel Pump Control Module in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .