Diagnosis Procedure

1. Turn ignition switch ON.
2. Check voltage between unified meter and A/C amp. harness connector M67 terminal 42 and ground.

   42 - Ground :

   Fig 1: View Of Voltage Graph

   Courtesy of NISSAN MOTOR CO., U.S.A.

Does it match fuel gauge reading? 

YES: GO TO 2.

NO: Replace the unified meter and A/C amp.

1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector and fuel level sensor unit (sub) connector.
3. Check continuity between unified meter and A/C amp. harness connector M67 terminal 42 and fuel level sensor unit (sub) harness connector B21 terminal 1.

   42 - 1 : Continuity should exist.

4. Check continuity between unified meter and A/C amp. harness connector M67 terminal 42 and ground.

   42 - Ground : Continuity should not exist.

Is the inspection result normal? 

OK : GO TO 3.

NG : Repair harness or connector.

1. Disconnect fuel level sensor unit and fuel pump (main) connector.
2. Check continuity between fuel level sensor unit (sub) harness connector B21 terminal 2 and fuel level sensor unit and fuel pump (main) harness connector B22 terminal 2.

   2 - 2 : Continuity should exist.

3. Check continuity between fuel level sensor unit (sub) harness connector B22 terminal 2 and ground.

   2 - Ground : Continuity should not exist.

Is the inspection result normal? 

OK : GO TO 4.

NG : Repair harness or connector.

Check continuity between fuel level sensor unit and fuel pump (main) harness connector B22 terminal 5 and unified meter and A/C amp. harness connector M67 terminal 58.

5 - 58 : Continuity should exist.

Is the inspection result normal? 

OK : GO TO 5.

NG : Repair harness or connector.

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.