LEMON Manuals: Even more car manuals for everyone
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 P0461: Fuel Level Sensor Circuit Range/Performance >> DTC Confirmation Test (Overall Function Check)

DTC Confirmation Test (Overall Function Check)

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: Use the following test to check overall function of fuel level sensor circuit. During this test, 1st trip DTC may not be confirmed.

With CONSULT-II

  1. Release fuel system pressure. See FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. Remove fuel feed hose from fuel level sensor unit located on top of fuel tank.
  2. Connect a fuel hose to fuel level sensor unit. Turn ignition off and wait at least 10 seconds. Turn ignition on. Select FUEL LEVEL SE in DATA MONITOR mode with CONSULT-II. Check FUEL LEVEL SE output voltage and note it.
  3. Select FUEL PUMP in ACTIVE TEST mode with CONSULT-II. Press ON and drain about 7.93 Gals. (30 L) of fuel, then press OFF. Fill tank with drained fuel.
  4. Check FUEL LEVEL SE output voltage. Voltage should change more than 0.03V during draining and refilling. If voltage is not as specified, go to DIAGNOSTIC PROCEDURE. If voltage is as specified, system is okay at this time.

With Generic Scan Tool

  1. 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 fuel level sensor signal circuit (Orange/Black wire) at ECM terminal No. 46 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 DIAGNOSTIC PROCEDURE. If voltage is as specified, system is okay at this time.
scientia non olet · About LEMON Manuals