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.
- CHECK FOR AN ACTIVE DTC NOTE:
If DTC P025A, P0627, or P1205 are present, repair that DTC before proceeding with this test.
- Turn the ignition on, engine not running.
- With the scan tool, read DTCs.
Is the DTC active?
Yes
- Go To 2
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
- CHECK THE (N13) FUEL PUMP PWM CONTROL CIRCUIT FOR A SHORT TO ANOTHER VOLTAGE SUPPLY
- Turn the ignition off.
- Disconnect the FPCM harness connector.
- Disconnect the Fuel Pump Assembly harness connector.
- Check for continuity between the (N13) Fuel Pump PWM Control circuit and all other circuits at the FPCM harness connector.
Is there continuity between the (N13) Fuel Pump PWM Control circuit and any other circuit?
Yes
- Repair the (N13) Fuel Pump PWM Control circuit for a short to the circuit that showed continuity.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Go To 3
- CHECK THE (N14) FUEL PUMP RETURN CIRCUIT FOR A SHORT TO ANOTHER VOLTAGE SUPPLY
- Check for continuity between the (N14) Fuel Pump Return circuit and all other circuits at the FPCM harness connector.
Is there continuity between the (N14) Fuel Pump Return circuit and any other circuit?
Yes
- Repair the (N14) Fuel Pump Return circuit for a short to the circuit that showed continuity.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Replace the Fuel Pump Control Module according to the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
- Check for continuity between the (N14) Fuel Pump Return circuit and all other circuits at the FPCM harness connector.