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Home >> Chrysler >> 2007 >> PT Cruiser Base, 2D Convertible, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0340 To P050B >> P0463-Fuel Level Sensor 1 Circuit High >> Diagnostic Test

Diagnostic Test

  1. 1) FUEL LEVEL SENSOR VOLTS ABOVE 4.9 VOLTS 
    NOTE: Diagnose any CAN - B and CAN - C Communication DTCs before continuing.

    Ignition on, engine not running.

    With a scan tool, read the Fuel Level Sensor voltage.

    Is the Fuel Level Sensor voltage above 4.9 volts? 

    Yes 

    1. Go to  2).

    No 

    1. Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Refer to INTERMITTENT CONDITION .
    2. Perform POWERTRAIN VERIFICATION TEST .
  2. 2) FUEL LEVEL SENSOR 

    Turn the ignition off.

    Disconnect the Fuel Pump Module electrical harness connector.

    Ignition on, engine not running.

    Connect a jumper wire between the (N4) Fuel Level Signal circuit and the (Z904) Fuel Level Sensor Ground circuit in the Fuel Pump Module harness connector.

    With the scan tool, read the Fuel Level Sensor voltage.

    Did the Fuel Level Sensor voltage change from above 4.8 volts to below 0.4 of a volt with the jumper wire installed? 

    Yes 

    1. Replace the Fuel Level Sensor.
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Go to  3).
      NOTE: Remove the jumper wire before continuing.
  3. 3) (N4) FUEL LEVEL SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE 
    Fig 1: Measuring Voltage On Fuel Level Signal Circuit
    GC0041672Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the C2 Cluster harness connector.

    Ignition on, engine not running.

    Measure the voltage on the (N4) Fuel Level Signal circuit in the Fuel Pump Module harness connector.

    Is the voltage above 5.2 volts? 

    Yes 

    1. Repair the short to battery voltage in the (N4) Fuel Level Signal circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Go to  4).
  4. 4) (N4) FUEL LEVEL SIGNAL CIRCUIT OPEN 
    Fig 2: Measuring Resistance Of Fuel Level Signal Circuit
    GC0041668Courtesy of CHRYSLER LLC

    Turn the ignition off.

    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 

    1. Go to  5).

    No 

    1. Repair the open in the (N4) Fuel Level Signal circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .
  5. 5) (Z904) FUEL LEVEL SENSOR GROUND CIRCUIT OPEN 
    Fig 3: Measuring Resistance Of Fuel Level Sensor Ground Circuit
    GC0041670Courtesy of CHRYSLER LLC

    Measure the resistance of the (Z904) Fuel Level Sensor Ground circuit from the Fuel Pump Module harness connector to the C2 Cluster harness connector.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go to  6).

    No 

    1. Repair the open in the (Z904) Fuel Level Sensor Ground circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .
  6. 6) INSTRUMENT CLUSTER 
    NOTE: Before continuing, check the Instrument Cluster harness connector terminals for corrosion, damage or terminal push out. Repair as necessary.

    Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.

    Were there any problems found? 

    Yes 

    1. Repair as necessary.
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Replace and program the Instrument Cluster per Service Information.
    2. Perform POWERTRAIN VERIFICATION TEST .
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