Low-Fuel Warning Lamp

WARNING: This page is about a different car, the 2007 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 MODE OF COMBINATION METER ".

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 6 and ground.
  Battery voltage should exist.
OK or NG

OK: GO TO 4.

NG: Replace the combination meter. Refer to "COMBINATION METER ".

Fig 1: Checking Voltage Between Combination Meter Harness Connector M24 Terminal 6 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK HARNESS FOR OPEN OR SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter connector.
3. Check continuity between combination meter harness connector M24 (B) terminal 6 and fuel level sensor unit and fuel pump harness connector B252 (A) terminal 2.
  Continuity should exist.
4. Check continuity between fuel level sensor unit and fuel pump harness connector B252 (A) terminal 2 and ground.
  Continuity should not exist.
OK or NG

OK: GO TO 5.

NG: Repair harness or connector.

Fig 2: Checking Continuity Between Combination Meter Harness Connector M24 (B) Terminal 6 And Fuel Level Sensor Unit And Fuel Pump Harness Connector B252 (A) Terminal 2, And Between Terminal 2 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK FUEL LEVEL SENSOR CIRCUIT
1. Check continuity between combination meter harness connector M24 (B) terminal 4 and fuel level sensor unit and fuel pump harness connector B252 (A) terminal 5.
  Continuity should exist.
2. Check continuity between fuel level sensor unit and fuel pump harness connector B252 (A) terminal 5 and ground.
  Continuity should not exist.
OK or NG

OK: GO TO 6.

NG: Repair harness or connector.

Fig 3: Checking Continuity Between Combination Meter Harness Connector M24 (B) Terminal 4 And Fuel Level Sensor Unit And Fuel Pump Harness Connector B252 (A) Terminal 5, And Between Connector Terminal 5 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
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 ".