Diagnosis Procedure
- CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Turn ignition switch ON.
- Check the voltage between ECM harness connector and ground.TERMINALS VOLTAGE REFERENCE
ECM Ground Voltage Connector Terminal F7 14 Ground Battery voltage
Is the inspection result normal?
YES: GO TO 4.
NO: GO TO 2.
- CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
- Turn ignition switch OFF.
- Disconnect IDPDM E/R harness connector E13.
- Check the continuity between IPDM E/R harness connector and ECM harness connector.TERMINALS CONTINUITY REFERENCE
ECM IPDM E/R Continuity Connector Terminal Connector Terminal F7 14 E13 33 Existed
Is the inspection result normal?
YES: GO TO 4.
NO: GO TO 3.
- DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E6, F123
- IPDM E/R connector E13
- Harness for open or short between ECM and IPDM E/R
Repair open circuit or short to ground or short to power in harness or connectors.
- CHECK 15A FUSE
- Disconnect 15A fuse (No. 57) from IPDM E/R.
- Check 15A fuse.
Is the inspection result normal?
YES: GO TO 5.
NO: Replace fuse.
- CHECK FUEL PUMP POWER SUPPLY CIRCUIT-III
- Disconnect "fuel level sensor unit and fuel pump" harness connector.
- Check the continuity between IPDM E/R harness connector and "fuel level sensor unit and fuel pump" and ground.TERMINALS CONTINUITY REFERENCE
IPDM E/R Fuel level sensor unit and fuel pump Continuity Connector Terminal Connector Terminal E14 46 B40 5 Existed
Is the inspection result normal?
YES: GO TO 7.
NO: GO TO 6.
- DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E105, M77
- Harness connectors M11, B1
- Harness for open or short between "fuel level sensor unit and fuel pump" and IPDM E/R
Repair open circuit or short to ground or short to power in harness or connectors.
- CHECK FUEL PUMP GROUND CIRCUIT
- Check the continuity between "fuel level sensor unit and fuel pump" and ground.TERMINALS CONTINUITY REFERENCE
Fuel level sensor unit and fuel pump Ground Continuity Connector Terminal B40 3 Ground Existed - Also heck harness for short to power.
Is the inspection result normal?
YES: GO TO 8.
NO: Repair open circuit or short to power in harness or connectors.
- Check the continuity between "fuel level sensor unit and fuel pump" and ground.
- CHECK FUEL PUMP
Refer to "COMPONENT INSPECTION ".
Is the inspection result normal?
YES: GO TO 9.
NO: Replace fuel pump.
- CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".
Is the inspection result normal?
YES: Replace IPDM E/R.
NO: Repair or replace harness or connectors.