Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 2.
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
(N4) FUEL LEVEL SIGNAL 1 CIRCUIT SHORTED TO VOLTAGE

Fig 1: Measuring Voltage Of Fuel Level Signal 1 Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Fuel Pump Module C1 harness connector.
3. Disconnect the Cluster C2 harness connector.
4. Turn the ignition on.
5. Measure the voltage of the (N4) Fuel Level Signal 1 circuit in the Fuel Pump Module harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (N4) Fuel Level Signal 1 circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .
  No
  - Go To 3.
FUEL PUMP MODULE
1. Turn the ignition off.
2. Reconnect the Cluster C2 harness connector.
3. Connect a jumper wire between the (N4) Fuel Level Signal 1 circuit and the (Z906) Ground in the Fuel Pump Module C1 harness connector.
4. Turn the ignition on.
5. With the scan tool, read DTCs
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 4.
  No
  - Replace the Fuel Pump Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .
(N4) FUEL LEVEL SIGNAL 1 OPEN OR HIGH RESISTANCE

Fig 2: Checking Fuel Level Signal 1 Open Or High Resistance
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Cluster C2 harness connector.
3. Measure the resistance of the (N4) Fuel Level Signal 1 circuit between the Fuel Pump Module C1 harness connector and the Cluster harness connector.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the (N4) Fuel Level Signal 1 circuit for an open circuit or high resistance.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .
  No
  - Go To 5.
(Z906) GROUND CIRCUIT OPEN OR HIGH RESISTANCE

Fig 3: Checking Ground Circuit Open Or High Resistance
Courtesy of CHRYSLER LLC
1. Measure the resistance between ground and the (Z906) Ground circuit in the Fuel Pump Module C1 harness connector.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the (Z906) Ground circuit for an open circuit or high resistance.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .
  No
  - Replace the Cluster in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .