Inspection/Fuel Level Sensor Unit And Fuel Pump

Check harness continuity between fuel level sensor unit and fuel pump connector terminal 5 and ground.

Fig 1: Identifying Fuel Level Sensor Unit And Fuel Pump Connector

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

OK or NG 

1. OK: GO TO 2.
2. NG: Repair harness or connector.

Refer to "FUEL LEVEL SENSOR UNIT CHECK  ".

OK or NG 

1. OK: GO TO 3.
2. NG: Replace fuel level sensor unit.

1. Disconnect combination meter connector and fuel level sensor unit and fuel pump connector.
2. Check continuity between combination meter terminal and fuel level sensor unit and fuel pump connector terminal.
   TERMINAL CONTINUITY
   
   

   Terminals				Continuity
   	(+)		(-)
   	Combination meter		Fuel level sensor unit and fuel pump
   Connector	Terminal (Wire color)	Connector	Terminal (Wire color)
   QG18DE(WITHOUT TACHOMETER)
   M30	30 (G)	B25	2 (G)	Yes
   QG18DE(WITHOUT TACHOMETER)
   M30	44 (G)	B25	2 (G)	Yes
   QR25DE
   M29	21 (G)	B25	2 (G)	Yes

   Fig 2: Disconnecting Combination Meter Connector And Fuel Level Sensor Unit And Fuel Pump Connector

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check continuity between combination meter terminal and ground.

OK or NG 

1. OK: Fuel level sensor unit is OK.
2. NG: Repair harness or connector.

Fig 3: Checking Continuity Between Combination Meter Terminal And Ground

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