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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 39 (Engine Controls - Self-Diagnostics - 1.8L - XE, GXE) >> Diagnostic Tests >> DTC P0460: Fuel Level Sensor Circuit Noise >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: For circuit wiring diagram, see Fig 1 . For connector identification and locations, see CONNECTOR IDENTIFICATION  .

  1. Check Power Supply Circuit

    Disconnect fuel level sensor harness connector. See Figure . Turn ignition on. Measure voltage between ground and fuel level sensor harness connector terminal No. 2. See Fig 1 . If battery voltage exists, go to step  3 . If battery voltage does not exist, go to next step.

  2. Detect Malfunctioning Part

    Check the following:
    • Harness connectors M16 and B3.
    • Harness for open or short between fuel level sensor and instrument cluster.

    Repair as necessary. Perform DTC CONFIRMATION TEST  to verify repair.

  3. Check Ground Circuit

    Turn ignition off. Check continuity between body ground and fuel pump assembly harness connector terminal No. 5. See Fig 1 . Continuity should exist. Also, check harness for short to power. If problem is found, repair as necessary. Perform DTC CONFIRMATION TEST  to verify repair. If problem is not found, go to next step.

  4. Check Input Signal Circuit

    Disconnect ECM harness connector. See Figure . Check continuity of the following:
    • Between fuel level sensor harness connector terminal No. 2 and ECM harness connector terminal No. 83.
    • Between fuel level sensor harness connector terminal No. 5 and ECM harness connector terminal No. 90.

    See Fig 1 . Also, check harness for short to ground and short to power. If problem is found, go to next step. If problem is not found, go to step  6 .

  5. Detect Malfunctioning Part

    Check the following:
    • Harness connectors F26 and M58.
    • Harness connectors M59 and F27.
    • Harness connectors M16 and B3.
    • Harness for open or short between fuel level sensor and ECM.

    Repair as necessary. Perform DTC CONFIRMATION TEST  to verify repair.

  6. Check Fuel Level Sensor

    Check fuel level sensor as shown in illustration. See Figure . If fuel level sensor is okay, go to next step. If fuel level sensor is not okay, replace fuel level sensor. Perform DTC CONFIRMATION TEST  to verify repair.

  7. Check For Intermittent

    Check for intermittent condition. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article. Perform DTC CONFIRMATION TEST  to verify repair.
Fig 1: Fuel Level Sensor Wiring Diagram
G00164658Courtesy of NISSAN MOTOR CO., U.S.A.
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