Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM - COUPE " or "WIRING DIAGRAM - SEDAN ".

1. CHECK HARNESS CONNECTOR
   1. Turn ignition switch OFF.
   2. Check combination meter and fuel level sensor unit terminals (meter-side and harness-side) for poor connection.

      Is the inspection result normal? 

      YES: GO TO 2

      NO: Repair or replace terminals or connectors.

2. CHECK FUEL LEVEL SENSOR UNIT CIRCUIT
   1. Disconnect combination meter connector and fuel level sensor unit connector.
   2. Check continuity between combination meter harness connector (A) and fuel level sensor unit and fuel pump harness connector (B).

      A		B		Continuity
      Connector	Terminal	Connector	Terminal
      M24	34	B42	2	Yes

      Fig 1: Checking Fuel Level Sensor Unit Circuit

      Courtesy of NISSAN NORTH AMERICA, INC.
   3. Check continuity between combination meter harness connector (A) and ground.

      A		Ground	Continuity
      Connector	Terminal
      M24	34		No

      Is the inspection result normal? 

      YES: GO TO 3

      NO: Repair harness or connector.

3. CHECK FUEL LEVEL SENSOR UNIT GROUND CIRCUIT
   1. Check continuity between combination meter harness connector (A) and fuel level sensor unit and fuel pump harness connector (B).

      A		B		Continuity
      Connector	Terminal	Connector	Terminal
      M24	24	B42	5	Yes

   2. Check continuity between combination meter harness connector (A) and ground.
      Fig 2: Checking Fuel Level Sensor Unit Ground Circuit

      Courtesy of NISSAN NORTH AMERICA, INC.

      A		Ground	Continuity
      Connector	Terminal
      M24	24		No

      Is the inspection result normal? 

      YES: GO TO 4

      NO: Repair harness or connector.

4. 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.

   Is the inspection result normal? 

   YES: Inspection End.

   NO: Install the fuel level sensor unit properly.