Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DTC
1. Ignition on, engine not running.
2. With the scan tool check for active DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2.
  No
  - Perform the INTERMITTENT CONDITION - 6.7L diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
CHECK THE FUEL LEVEL SENSOR

Fig 1: Checking Fuel Level Sensor Resistance
Courtesy of CHRYSLER LLC
1. Turn ignition off.
2. Disconnect the Fuel Level Sensor harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
3. Measure the resistance of the Fuel Level Sensor across the (N4) Fuel Level Sensor Signal circuit and (Z210) Fuel Level Sensor Return circuit terminals.
  Is the resistance between approximately 20 and 220 Ohms?
  
  Yes
  - Go To 3.
  No
  - Replace the Fuel Level Sensor in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (N4) FUEL LEVEL SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE

Fig 2: Checking Fuel Level Sensor Signal Circuit For A Short To Voltage
Courtesy of CHRYSLER LLC
1. Disconnect the TIPM C7 harness connector.
2. Turn ignition on.
3. Measure the voltage of the (N4) Fuel Level Sensor Signal circuit at the TIPM C7 harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (N4) Fuel Level Sensor Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 4.
CHECK THE (N4) FUEL LEVEL SENSOR SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE

Fig 3: Checking The Fuel Level Sensor Signal Circuit For An Open Or High Resistance
Courtesy of CHRYSLER LLC
1. Turn ignition off.
2. Measure the resistance of the (N4) Fuel Level Sensor Signal circuit between the TIPM C7 harness connector and the Fuel Pump Module harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 5.
  No
  - Repair the (N4) Fuel Level Sensor Signal circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (G109) FUEL LEVEL SENSOR RETURN CIRCUIT FOR AN OPEN/HIGH RESISTANCE

Fig 4: Checking Fuel Level Sensor Return Circuit For An Open Or High Resistance
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (G109) Fuel Level Sensor Return circuit between the TIPM C7 harness connector and the Fuel Pump Module harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Replace the Totally Integrated Power Module (TIPM) in accordance with the service information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repair the (G109) Fuel Level Sensor Return circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .