FUEL PUMP UNIT INSPECTION[L3]


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Continuity Inspection

1.  Disconnect the negative battery cable.

2.  Disconnect the fuel pump unit connector. (See FUEL PUMP UNIT REMOVAL/INSTALLATION[L3].)

3.  Inspect for continuity between fuel pump unit terminals C—D.

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•  If there is continuity, perform the Circuit Open/Short Inspection.
•  If there is no continuity, replace the fuel pump unit.


Circuit Open/Short Inspection

1.  Inspect the following wiring harnesses for an open or short circuit (Continuity check).

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Open circuit

•  If there is no continuity, the circuit is open. Repair or replace the wiring harness.
―  Fuel pump unit terminal C and fuel pump relay terminal E
―  Fuel pump unit terminal D and body ground


Short circuit

•  If there is continuity, the circuit is shorted. Repair or replace the wiring harness.
―  Fuel pump unit terminal C and body ground
―  Fuel pump unit terminal D and power supply


Fuel Static Pressure Inspection

Note
•  The fuel static pressure inspection cannot be performed because the pressure regulator is integrated with the fuel pump unit.