Diagnosis Procedure

1. Turn ignition switch OFF.
2. Disconnect FPCM harness connector.
3. Turn ignition switch ON.
4. Check the voltage between FPCM harness connector and ground.

   +		-	Voltage
   FPCM
   Connector	Terminal
   B41	10	Ground	Battery voltage

   Is the inspection result normal? 

   YES: GO TO 2.

   NO: Perform the trouble diagnosis for power supply circuit. Refer to "DIAGNOSIS PROCEDURE ".

1. Turn ignition switch OFF.
2. Check the continuity between FPCM harness connector and ground.

   +		-	Continuity
   FPCM
   Connector	Terminal
   B41	5	Ground	Existed

   Is the inspection result normal? 

   YES: GO TO 3.

   NO: Repair open circuit or short to power in harness or connectors.

1. Disconnect ECM harness connector.
2. Check the continuity between FPCM harness connector and ECM harness connector.

   +		-		Continuity
   FPCM		ECM
   Connector	Terminal	Connector	Terminal
   B41	8	E80	125	Existed
   	9		142

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

   Is the inspection result normal? 

   YES: GO TO 4.

   NO: Repair or replace error-detected parts.

1. Disconnect fuel level sensor unit and fuel pump harness connector.
2. Check the continuity between FPCM harness connector and fuel level sensor unit and fuel pump harness connector.

   +		-		Continuity
   FPCM		Fuel level sensor unit and fuel pump
   Connector	Terminal	Connector	Terminal
   B41	6	C5	3	Existed
   	7		1

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

   Is the inspection result normal? 

   YES: GO TO 5.

   NO: Repair or replace error-detected parts.

Refer to "COMPONENT INSPECTION (LOW PRESSURE FUEL PUMP) ".

Is the inspection result normal? 

YES: GO TO 6.

NO: Replace fuel level sensor unit and fuel pump. Refer to "REMOVAL AND INSTALLATION ".

Refer to "COMPONENT INSPECTION (FPCM) ".

Is the inspection result normal? 

YES: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

NO: Replace FPCM. Refer to "REMOVAL AND INSTALLATION ".