 1.CHECK GROUND CONNECTION
- Turn ignition switch OFF.
- Check ground connection M95. Refer to Ground Inspection in Circuit Inspection.
Is the inspection result normal?
YES >>GO TO 2. NO >>Repair or replace ground connection.
 2.CHECK FPCM POWER SUPPLY CIRCUIT-I
- Turn ignition switch OFF.
- Disconnect fuel pump control module (FPCM) harness connector.
- Turn ignition switch ON.
- Check the voltage between FPCM harness connector and ground.
FPCM
| Ground
| Voltage
| Connector
| Terminal
| B230
| 10
| Ground
| Battery voltage
|
Is the inspection result normal?
YES >>GO TO 4. NO >>GO TO 3.
 3.DETECT MALFUNCTIONING PART
Check the following. - 15A fuse (No.41)
- Harness connectors B201, M117
- Harness for open or short between IPDM E/R and FPCM
>>Repair open circuit, short to ground or short to power in harness or connectors.
 4.CHECK FPCM GROUND CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Check the continuity between FPCM harness connector and ground.
FPCM
| Ground
| Continuity
| Connector
| Terminal
| B230
| 1
| Ground
| Existed
| 5
|
- Also check harness for short to power.
Is the inspection result normal?
YES >>GO TO 5. NO >>Repair open circuit or short to power in harness or connectors.
 5.CHECK FPCM CONTROL SIGNAL CIRCUIT FOR OPEN OR SHORT
- Disconnect ECM harness connector.
- Check the continuity between FPCM harness connector and ECM harness connector.
FPCM
| ECM
| Continuity
| Connector
| Terminal
| Connector
| Terminal
| B230
| 8
| F101
| 29
| Existed
| 9
| 30
|
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >>GO TO 7. NO >>GO TO 6.
 6.DETECT MALFUNCTIONING PART
Check the following. - Harness connectors E103, M116
- Harness connectors B201, M117
- Harness for open or short between FPCM and ECM
>>Repair open circuit, short to ground or short to power in harness or connectors.
 7.CHECK FPCM OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Disconnect “fuel level sensor unit and fuel pump (main)” harness connector.
- Check the continuity between FPCM harness connector and “fuel level sensor unit and fuel pump (main)” harness connector.
FPCM
| Fuel level sensor unit and fuel pump (main)
| Ground
| Continuity
| Connector
| Terminal
| Connector
| Terminal
| B230
| 6
| B225
| 5
| Ground
| Existed
| 7
| 4
|
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >>GO TO 8. NO >>Repair open circuit, short to ground or short to power in harness or connectors.
 8.CHECK FUEL PUMP
 9.CHECK FPCM
 10.CHECK INTERMITTENT INCIDENT
|