Diagnosis Procedure

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Turn ignition switch ON.
4. Check the voltage between ECM harness connector terminals.

   ECM				Voltage
   Connector	Terminal	Connector	Terminal
   F25	118	E16	162	Battery voltage

Is the inspection result normal?

YES

GO TO 3.

NO

GO TO 2.

1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector.
3. Check the continuity between ECM harness connector and IPDM E/R harness connector.

   ECM		IPDM E/R		Continuity
   Connector	Terminal	Connector	Terminal
   F25	118	F96	76	Existed

4. Also check harness for short to power.

Is the inspection result normal?

YES

Perform trouble diagnosis for power supply circuit.

NO

Repair or replace malfunctioning part.

1. Turn ignition switch OFF.
2. Reconnect ECM harness connector.
3. Disconnect "fuel level sensor unit and fuel pump" harness connector.
4. Turn ignition switch ON.
5. Check the voltage between "fuel level sensor unit and fuel pump" harness connector and ground.

   +		-	Voltage
   Fuel level sensor unit and fuel pump
   Connector	Terminal
   B48	8	Ground	Battery voltage should exist 1 second after ignition switch is turn ON.

Is the inspection result normal?

YES

GO TO 5.

NO

GO TO 4.

1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector.
3. Check the continuity between "fuel level sensor unit and fuel pump" harness connector and IPDM E/R harness connector.

   Fuel level sensor unit and fuel pump		IPDM E/R		Continuity
   Connector	Terminal	Connector	Terminal
   B48	8	E45	46	Existed

4. Also check harness for short to power.

Is the inspection result normal?

YES

Perform trouble diagnosis for power supply circuit.

NO

Repair or replace malfunctioning part.

1. Turn ignition switch OFF.
2. Check the continuity between "fuel level sensor unit and fuel pump" harness connector and ground.

   Fuel level sensor unit and fuel pump		--	Continuity
   Connector	Terminal
   B48	7	Ground	Existed

3. Also check harness for short to ground and to power.

Is the inspection result normal?

YES

GO TO 6.

NO

Repair or replace malfunctioning part.

Check fuel pump. Refer to Component Inspection .

Is the inspection result normal?

YES

Check intermittent incident. Refer to Intermittent Incident .

NO

Replace "fuel level sensor unit and fuel pump". Refer to Removal and Installation .