Diagnosis Procedure
- CHECK FPCM POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect FPCM harness connector.
- Turn ignition switch ON.
- Check the voltage between FPCM harness connector and ground.VOLTAGE SPECIFICATION
+ - 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 ".
- CHECK FPCM GROUND CIRCUIT
- CHECK FPCM INPUT AND OUTPUT CIRCUIT
- Disconnect ECM harness connector.
- Check the continuity between FPCM harness connector and ECM harness connector.CONTINUITY SPECIFICATION
+ - Continuity FPCM ECM Connector Terminal Connector Terminal B41 8 E80 125 Existed 9 142 - 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.
- CHECK FUEL PUMP CONTROL CIRCUIT
- Disconnect fuel level sensor unit and fuel pump harness connector.
- Check the continuity between FPCM harness connector and fuel level sensor unit and fuel pump harness connector.CONTINUITY SPECIFICATION
+ - Continuity FPCM Fuel level sensor unit and fuel pump Connector Terminal Connector Terminal B41 6 C5 3 Existed 7 1 - 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.
- CHECK LOW PRESSURE FUEL PUMP
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 ".
- CHECK FPCM
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 ".