Low-Fuel Warning Lamp

WARNING: This page is about a different car, the 2006 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

Depending on vehicle posture or driving circumstances, the fuel level in the tank varies, and the warning lamp ON timing may be changed.

CHECK SELF-DIAGNOSIS
Perform combination meter self-diagnosis. Refer to , "SELF-DIAGNOSIS FUNCTION ".

OK or NG

OK: GO TO 2.

NG: Replace the combination meter. Refer to , "COMBINATION METER ".
CHECK HARNESS CONNECTOR
1. Turn the ignition switch OFF.
2. Check combination meter and fuel level sensor unit and fuel pump terminals (meter-side and harness side) for poor connection and damaged terminals.
OK or NG

OK: GO TO 3.

NG: Repair or replace terminals or connectors.
CHECK HARNESS CONNECTOR OUTPUT SIGNAL
1. Disconnect fuel level sensor unit and fuel pump connector.
2. Turn ignition switch ON.
3. Check voltage between combination meter harness connector M24 terminal 2 and ground.
  Battery voltage should exist.
Fig 1: Checking Voltage Between Combination Meter M24 Terminal 2 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 4.

NG: Replace the combination meter. Refer to , "COMBINATION METER ".
CHECK HARNESS FOR OPEN OR SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter connector M24.
3. Check continuity between combination meter harness connector M24 terminal 2 and fuel level sensor unit and fuel pump harness connector B252 terminal 2.
  Continuity should exist.
4. Check continuity between fuel level sensor unit and fuel pump harness connector B252 terminal 2 and ground.
  Continuity should not exist.
  
  Fig 2: Checking Harness For Open Or Short Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: GO TO 5.

NG: Repair harness or connector.
CHECK FUEL LEVEL SENSOR CIRCUIT
1. Check continuity between combination meter harness connector M24 terminal 3 and fuel level sensor unit and fuel pump harness connector B252 terminal 5.
  Continuity should exist.
2. Check continuity between fuel level sensor unit and fuel pump harness connector B252 terminal 5 and ground.
  Continuity should not exist.
  
  Fig 3: Checking Fuel Level Sensor Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: GO TO 6.

NG: Repair harness or connector.
CHECK INSTALLATION CONDITION
Check fuel level sensor unit installation, and determine whether the float arm interferes or binds with any of the internal components in the fuel tank.

OK or NG

OK: GO TO 7.

NG: Install the fuel level sensor unit properly.
CHECK FUEL LEVEL SENSOR UNIT
Check the fuel level sensor unit. Refer to , "FUEL LEVEL SENSOR UNIT CHECK ".

OK or NG

OK: Replace the combination meter. Refer to , "COMBINATION METER ".

NG: Replace the fuel level sensor unit. Refer to , "REMOVAL AND INSTALLATION ".