FUEL PUMP UNIT INSPECTION [ZJ, ZY]

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Fuel Pump Operation Inspection

1.  Remove the fuel-filler cap.

2.  Start the fuel pump using the following procedure.

Using M-MDS

1.  Connect the M-MDS to the DLC-2.

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2.  Start the fuel pump using the FP simulation function.

Without using M-MDS

1.  Disconnect the negative battery cable.

2.  Remove the fuel pump relay.

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Caution

•  Short the specified terminal as shortening the wrong terminal of the relay and fuse block may cause malfunctions.

3.  Using a jumper wire, short fuel pump relay terminals C and D in the relay and fuse block.

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4.  Connect the negative battery cable and start the fuel pump. (See BATTERY REMOVAL/INSTALLATION [ZJ, ZY].)

3.  Verify that operation sound is heard from the fuel pump.

•  If the operation sound cannot be verified, measure the voltage at fuel pump wiring harness-side connector terminal B.

―  If as specified, inspect the following.

•  Fuel pump continuity inspection

―  If not within the specification, inspect the following.

•  fuel pump relay

•  Wiring harnesses and connectors between main relay—fuel pump relay—fuel pump

Continuity Inspection

1.  Disconnect the negative battery cable.

2.  Disconnect the fuel pump unit connector.

3.  Inspect for continuity between fuel pump unit terminals A—B.

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•  If there is no continuity, replace the fuel pump. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [ZJ, ZY].)

Fuel Static Pressure Inspection

Note

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