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Home › Nissan-Datsun › 2004 › Frontier Desert Runner SE › Repair and Diagnosis › Engine Performance › Engine Control System - VG33E › DTC P0460: Fuel Level Sensor › Diagnostic Procedure

Diagnostic Procedure

  1. CHECK FUEL LEVEL SENSOR POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect fuel level sensor unit harness connector.
    3. Turn ignition switch ON.
    4. Check voltage between fuel level sensor unit terminal G and engine ground with CONSULT-II or a tester.

      Voltage: Approximately 12V 

      Fig 1: Checking Voltage Between Fuel Level Sensor Unit Terminal G And Engine Ground
      G00743020Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO  3.
    2. NG: GO TO 2.
  2. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors M67, C1
    • Harness for open or short between combination meter and fuel level sensor unit
    1. : Repair open circuit or short to ground or short to power in harness or connectors.
  3. CHECK FUEL LEVEL SENSOR GROUND CIRCUIT FOR OPEN AND SHORT 
    1. Turn ignition switch OFF.
    2. Check harness continuity between fuel level sensor unit terminal E and body ground. Refer to WIRING DIAGRAM .

      Continuity should exist. 

    3. Also check harness for short to power.

    OK or NG 

    1. OK: GO TO  5.
    2. NG: GO TO 4.
  4. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors M67, C1
    • Harness for open or short between fuel level sensor unit and engine ground
    1. : Repair open circuit or short to power in harness or connectors.
  5. CHECK FUEL LEVEL SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Disconnect ECM harness connector.
    2. Check harness continuity between ECM terminal 46 and fuel level sensor unit terminal G, ECM terminal 66 and fuel level sensor unit terminal E. Refer to WIRING DIAGRAM .

      Continuity should exist. 

    3. Also check harness for short to ground and short to power.

    OK or NG 

    1. OK: GO TO  7.
    2. NG: GO TO 6.
  6. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors M67, C1
    • Harness connectors M81, F36
    • Harness for open or short between ECM and fuel level sensor
    1. : Repair open circuit or short to ground or short to power in harness or connectors.
  7. CHECK FUEL LEVEL SENSOR 

    Refer to INSPECTION/FUEL LEVEL SENSOR UNIT ".

    OK or NG 

    1. OK: GO TO 8.
    2. NG: Replace fuel level sensor unit.
  8. CHECK INTERMITTENT INCIDENT 

    Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

    1. : INSPECTION END 
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