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
- 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 AN OPEN/HIGH RESISTANCE
- Turn the ignition off.
- Disconnect the FPCM harness connector.
- Disconnect the Fuel Pump Module harness connector.
- Measure the resistance of the (N13) Fuel Pump PWM Control circuit between the FPCM harness connector and the Fuel Pump assembly harness connector.
Is the resistance below 3.0 Ohms?
Yes
- Go To 3
No
- Repair the (N13) Fuel Pump PWM Control circuit for an open or high resistance.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
- CHECK THE (N14) FUEL PUMP PWM RETURN CIRCUIT FOR AN OPEN/HIGH RESISTANCE
- Measure the resistance of the (N14) Fuel Pump PWM Return circuit between the FPCM harness connector and the Fuel Pump assembly harness connector.
Is the resistance below 3.0 Ohms?
Yes
- Replace the Fuel Pump assembly in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Repair the (N14) Fuel Pump PWM Return circuit for an open or high resistance.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
- Measure the resistance of the (N14) Fuel Pump PWM Return circuit between the FPCM harness connector and the Fuel Pump assembly harness connector.