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Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 671 (Combination Meters - Sedan) >> Combination Meters >> Inspection/Fuel Level Sensor >> Low-Fuel Warning Lamp

Low-Fuel Warning Lamp

WARNING: This page is about a different car, the 2003 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

Depending on vehicle position or driving circumstance, the fuel in the tank flows and the warning lamp ON timing may change.

  1. CHECK HARNESS CONNECTOR

    Check combination meter and fuel level sensor unit terminals (meter-side, unit-side harness-side) for looseness or bent terminals.

    OK or NG 

    1. OK : GO TO 2.
    2. NG : Repair terminal or connector.
  2. CHECK COMBINATION METER CIRCUIT
    1. Disconnect combination meter connector and fuel level sensor unit (sub) connector.
    2. Check continuity between combination meter harness connector M19 terminal 17 (W/B) and fuel level sensor unit (sub) harness connector B28 terminal 1 (W/B).
      1. Continuity should exist. 
    3. Check continuity between combination meter harness connector M19 terminal 17 (W/B) and ground.
      1. Continuity should not exist. 

    OK or NG 

    1. OK : GO TO 3.
    2. NG : Repair harness or connector.
    Fig 1: Checking Combination Meter Circuit
    G02158609Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK FUEL LEVEL SENSOR CIRCUIT
    1. Disconnect fuel level sensor unit and fuel pump (main) connector.
    2. Check continuity between fuel level sensor unit (sub) harness connector B28 terminal 2 (Y) and fuel level sensor unit and fuel pump (main) harness connector B27 terminal 2 (Y).
      1. Continuity should exist. 
    3. Check continuity between fuel level sensor unit (sub) harness connector B28 terminal 2 (Y) and ground.
      1. Continuity should not exist. 

    OK or NG 

    1. OK : GO TO 4.
    2. NG : Repair harness or connector.
    Fig 2: Checking Fuel Level Sensor Circuit
    G02158610Courtesy of NISSAN MOTOR CO., U.S.A.
  4. CHECK GROUND CIRCUIT

    Check continuity between fuel level sensor unit and fuel pump (main) harness connector B27 terminal 5 (B) and ground.

    1. Continuity should exist. 

    OK or NG 

    1. OK : GO TO 5.
    2. NG : Repair harness or connector.
    Fig 3: Checking Ground Circuit
    G02158611Courtesy of NISSAN MOTOR CO., U.S.A.
  5. CHECK FUEL LEVEL SENSOR

    Check fuel level sensor units. Refer to "FUEL LEVEL SENSOR UNIT CHECK ".

    OK or NG 

    1. OK : GO TO 6.
    2. NG : Replace fuel level sensor unit and fuel pump (main) or fuel level sensor unit
  6. CHECK INSTALLATION CONDITION

    Check fuel level sensor unit installation, and check whether the float arm interferes or binds with any of the internal components in the fuel tank.

    OK or NG 

    1. OK : Replace combination meter.
    2. NG : Install fuel level sensor unit properly.
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