Diagnosis Procedure

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

Terminals			Voltage (Approx.)
(+)		(-)
Unified meter and A/C amp.		Ground
Connector	Terminal
M67	42		Courtesy of NISSAN NORTH AMERICA, INC.

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 and fuel level sensor unit (sub) harness connector.

   Unified meter A/C amp.		Fuel level sensor unit (sub)		Continuity
   Connector	Terminal	Connector	terminal
   M67	42	B21	1	Existed

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

Is the inspection result normal? 

YES: GO TO 3.

NO: 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 and fuel level sensor unit and fuel pump (main) harness connector.

   Fuel level sensor unit (sub)		Fuel level sensor unit and fuel pump (main)		Continuity
   Connector	Terminal	Connector	terminal
   B21	2	B22	2	Existed

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

Is the inspection result normal? 

YES: GO TO 4.

NO: Repair harness or connector.

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

Is the inspection result normal? 

YES: GO TO 5.

NO: 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.