Diagnostic Test

ACTIVE DTC
NOTE: Diagnose any CAN - C or CAN - B Communication DTCs before continuing.
1. Start the engine.
2. Allow the engine to reach normal operating temperature.
3. With a scan tool, select View DTCs and record the related Freeze Frame data.
  NOTE: It may be necessary to drive the vehicle to meet the conditions to set this DTC, try to repeat the conditions in which the fault originally set by reviewing the Freeze Frame data.
  
  Is the DTC Active at this time?
  
  Yes
  - Go to step 2
  No
  - Refer to the INTERMITTENT CONDITION Diagnostic Procedure. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
FUEL LEVEL SENSOR
1. Turn the ignition off.
2. Disconnect the Fuel Pump Module harness connector.
3. Ignition on, engine not running.
4. With the scan tool, read the Fuel Level Sensor voltage.
  Did the Fuel Level Sensor voltage change from below 0.4 of a volt to above 4.0 volts?
  
  Yes
  - Verify that there is good pin to terminal contact in the Cluster and Fuel Pump Module connectors. Replace the Fuel Level Sensor if no problems were found in the connectors.
  - Perform BODY VERIFICATION TEST-VER 1. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 3
(N4) FUEL LEVEL SIGNAL CIRCUIT SHORTED TO GROUND

Fig 1: Measuring Resistance Between Ground And Fuel Level Signal Circuit In Fuel Pump Module Harness Connector
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the C2 Cluster harness connectors.
3. Measure the resistance between ground and the (N4) Fuel Level Signal circuit in the Fuel Pump Module harness connector.
  Is the resistance below 100 ohms?
  
  Yes
  - Repair the short to ground in the (N4) Fuel Level Signal circuit.
  - Perform BODY VERIFICATION TEST-VER 1. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 4
(N4) FUEL LEVEL SIGNAL CIRCUIT SHORTED TO THE (N5) FUEL LEVEL SENSOR RETURN CIRCUIT

Fig 2: Measuring Resistance Between Fuel Level Signal Circuit And Fuel Level Sensor Return Circuit In Fuel Pump Module Harness Connector
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (N4) Fuel Level Signal circuit and the (N5) Fuel Level Sensor Return circuit in the Fuel Pump Module harness connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Repair the short between the (N5) Fuel Level Sensor Return circuit and the (N4) Fuel Level Signal circuit.
  - Perform BODY VERIFICATION TEST-VER 1. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 5
EXCESSIVE RESISTANCE IN THE (N4) FUEL LEVEL SIGNAL CIRCUIT

Fig 3: Measuring Resistance Of Fuel Level Signal Circuit From Fuel Pump Module Harness Connector To C2 Cluster Harness Connector
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (N4) Fuel Level Signal circuit from the Fuel Pump Module harness connector to the C2 Cluster harness connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Go to step 6
  No
  - Repair the excessive resistance in the (N4) Fuel Level Signal circuit.
  - Perform BODY VERIFICATION TEST-VER 1. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
INSTRUMENT CLUSTER
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Cluster and the Fuel Pump Module.
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Cluster and Fuel Pump Module connectors.
4. Refer to any Technical Service Bulletins that may apply.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform BODY VERIFICATION TEST-VER 1. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Replace and program the Instrument Cluster per Service Information.
  - Perform BODY VERIFICATION TEST-VER 1. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .