2002 Nissan-Datsun Sentra SE-R, AutomaticFACTORY OEM SERVICE PROCEDURE

DTC Confirmation Test (Overall Function Check)

NOTE: Use the following test to check overall function of fuel level sensor. During this test, DTC may not be confirmed.
  1. To check overall function of fuel level sensor, release fuel system pressure. See FUEL PRESSURE RELEASE under 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 spare fuel hose to fuel level sensor unit. Turn ignition off. Prepare voltmeter leads to measure voltage between ground and fuel level sensor signal circuit at ECM terminal No. 87 (Green/Red wire) by backprobing. See Figure. Turn ignition on and note voltage reading.
  3. Using suitable equipment, drain 7.93 gals. (30.0 L) of fuel from tank and note voltage reading. Refill tank with drained fuel. Voltage should change more than 0.03 volt during draining and refilling. If voltage is as specified, no problem is indicated at this time. Problem may be intermittent. See INTERMITTENTS in TROUBLESHOOTING - NO CODES article. If voltage is not as specified, go to DIAGNOSTIC 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.