Low-Fuel Warning Lamp

WARNING: This page is about a different car, the 2003 Nissan Altima. 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.

CONNECTOR INSPECTION
1. Turn the ignition switch OFF.
2. Check meter, fuel level sensor unit and 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.
CONTINUITY INSPECTION BETWEEN COMBINATION METER AND FUEL LEVEL SENSOR UNIT
1. Disconnect combination meter connector and fuel level sensor unit connector.
2. Check continuity (open circuit) between combination meter harness connector M24 terminal 12 (G/B) and fuel level sensor unit harness connector B16 terminal G (B).
3. Check continuity (short circuit) between combination meter harness connector M24 terminal 12 (G/B) and ground.
  
  Fig 1: Combination Meter And Fuel Level Sensor Unit Terminal Continuity
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Checking Continuity Between Combination Meter And Fuel Level Sensor Unit Terminal
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 3.
2. NG: Repair harness or connector.
GROUND CIRCUIT INSPECTION OF FUEL LEVEL SENSOR
- Check continuity (open circuit) between fuel level sensor unit harness connector B16 terminal E (B) and ground.
  
  Fig 3: Ground Circuit Of Fuel Level Sensor Terminal Continuity
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 4: Checking Continuity Between Fuel Level Sensor Unit Harness Connector B16 Terminal E And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK of NG
1. OK: GO TO 4.
2. NG: Repair harness or connector.
FUEL LEVEL SENSOR INSPECTION
Check components. Refer to "FUEL LEVEL SENSOR UNIT CHECK ".

OK or NG
1. OK: GO TO 5.
2. NG: Replace fuel level sensor unit.
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 the combination meter.
2. NG: Install the fuel level sensor unit properly.