Diagnosis Procedure

1. CHECK COMBINATION METER INPUT SIGNAL
   1. Turn ignition switch ON.
   2. Check voltage between combination meter harness connector terminal and ground.
   CONNECTOR TERMINAL VOLTAGE CHART
   
   

   Terminal			Voltage (Approx.)
   (+)		(-)
   Combination meter
   Connector	Terminal
   M34	34	Ground	Courtesy of NISSAN MOTOR CO., U.S.A.

   Does it match fuel gauge reading? 

   YES: GO TO 2.

   NO: Replace the combination meter.

2. CHECK FUEL LEVEL SENSOR CIRCUIT
   1. Turn ignition switch OFF.
   2. Disconnect combination meter connector and fuel level sensor unit and fuel pump (fuel level sensor) connector.
   3. Check continuity between combination meter harness connector terminal and fuel level sensor unit and fuel pump (fuel level sensor) harness connector terminal.
      CONNECTOR TERMINAL CONTINUITY CHART
      
      

      Combination meter		Fuel level sensor unit and fuel pump (fuel level sensor)		Continuity
      Connector	Terminal	Connector	Terminal
      M34	34	B40	4	Existed

   4. Check continuity between combination meter harness connector terminal and ground.
   CONNECTOR TERMINAL CONTINUITY CHART
   
   

   Combination meter		Ground	Continuity
   Connector	Terminal
   M34	34		Not existed

   Is the inspection result normal? 

   YES: GO TO 3.

   NO: Repair harness or connector.

3. CHECK FUEL LEVEL SENSOR GROUND CIRCUIT

Check continuity between fuel level sensor unit and fuel pump (fuel level sensor) harness connector terminal and combination meter harness connector terminal.

Is the inspection result normal? 

YES: INSPECTION END

NO: Repair harness or connector.