2001 Nissan-Datsun Pathfinder SE, RWD, StandardFACTORY OEM SERVICE PROCEDURE

DTC Confirmation Test (Overall Function Check)

NOTE: Use the following test to check overall function of fuel level sensor circuit. During this test, 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:

  • Fuel level sensor circuit open or shorted.
  • Defective fuel level sensor.

  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. 83 (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 operation is not as specified, go to PROCEDURE .
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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