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Home >> Nissan-Datsun >> 2001 >> Altima GLE >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0461: Fuel Level Sensor Function >> DTC Confirmation Test (Overall Function Check)
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DTC Confirmation Test (Overall Function Check)

NOTE: Use the following test to check overall function of fuel level sensor. During this test, first trip DTC may not be confirmed.

Malfunction is detected when fuel level sensor output does not change when vehicle has been driven a long distance. Possible causes are:

  1. To check overall function of fuel level sensor circuit, release fuel system pressure. See FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. Remove fuel feed hose from fuel level sensor unit located behind access cover, under rear seat.
    2. CAUTION: DO NOT use ECM ground terminals when measuring voltage.
  2. Connect a fuel hose to fuel level sensor unit. Place other end of hose into a suitable fuel container. Turn ignition off. Set voltmeter probes between ground and ECM terminal No. 45 (fuel level sensor signal) by backprobing. See Figure and Figure . Turn ignition on and monitor voltmeter.
  3. Using suitable equipment, drain 7.93 gals. (30.0 L) of fuel from tank. Refill tank with drained fuel. Voltage should change more than .03 volt during draining and refilling. If voltage is not as specified, go to PROCEDURE .
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