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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R >> Repair and Diagnosis >> External Pages >> Different car >> Section 38 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0460: Fuel Level Sensor >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect fuel pump assembly harness connector. Access cover is located under rear seat. Measure voltage between ground and fuel pump assembly harness connector terminal "G" (Green/Black wire). See Figure. If voltage is about 5 volts, go to step  3. If voltage is not about 5 volts, go to next step.
  2. Check the following:
    • Check for poor connection at White, 16-pin connector M12 terminal No. 8 (Green/Black wire). See Figure. Connector M12 is located under left side of instrument panel. See Figure.
    • Check for open or short between fuel pump assembly and instrument cluster.

    Repair as necessary.

  3. Turn ignition off. Check continuity between body ground and fuel pump assembly harness connector terminal "E" (Black wire). Continuity should exist. Also, check circuit for short to voltage. If problem is found, go to next step. If problem is not found, go to step  5.
  4. Check the following:
    • Check for poor connection at White, 16-pin connector M12 terminal No. 2 (Black wire). See Figure. Connector M12 is located under left side of instrument panel. See Figure.
    • Check for open or short between fuel pump assembly and body ground.

    Repair as necessary.

  5. Disconnect ECM harness connector. See Figure. Check continuity of the following:
    • Green/Black wire between fuel pump assembly harness connector terminal "G" and ECM harness connector terminal No. 87 (on 2.5L) or No. 69 (on 3.5L).
    • Between fuel pump assembly harness connector terminal "E" (Black wire) and Black/Red wire at ECM harness connector terminal No. 77 (on 2.5L) or No. 78 (on 3.5L).

    See Figure. Also, check circuits for short to ground and short to voltage. If problem is found, go to next step. If problem is not found, go to step  7.

  6. Check the following:
    • Check for poor connection at White, 16-pin connector M12 terminals No. 2 (Black wire) and No. 8 (Green/Black wire). See Figure. Connector M12 is located under left side of instrument panel. See Figure.
    • Check for poor connection at White, 24-pin connector F59 terminals No. 16 (Black/Red wire) and No. 18 (Green/Black wire). See Figure. Connector F59 is located near ECM. See Figure or Figure .
    • Check for open or short between fuel pump assembly and body ground.

    Repair as necessary.

  7. Remove fuel pump assembly. Measure resistance between fuel pump assembly terminals "G" and "E" as shown in illustration. See Figure. If resistance is as specified, go to next step. If resistance is not as specified, replace fuel level sensor.
  8. No problem is indicated at this time. Problem may be intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.
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