FUEL INJECTOR INSPECTION[AJ (3.0L Duratec)]

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Leakage Inspection

Warning

•  Fuel line spills and leakage from the pressurized fuel system are dangerous. To prevent this, complete the following inspection with the engine stopped.

1.  Perform the 'Fuel Line Safety Procedure' referring to the BEFORE SERVICE PRECAUTION. (See BEFORE SERVICE PRECAUTION[AJ (3.0L Duratec)].)

2.  Disconnect the negative battery cable.

3.  Remove the fuel injector and fuel distributor as a single unit. (See FUEL INJECTOR REMOVAL/INSTALLATION[AJ (3.0L Duratec)].)

4.  Fix the fuel injector to the fuel distributor with a wire or the equivalent.

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5.  Connect the fuel hose.

6.  Connect the negative battery cable.

7.  Turn the ignition switch to the ON position.

8.  Connect the M-MDS to the DLC-2.

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9.  Using the “FP” simulation function, verify the fuel pump operation sound when the fuel pump relay is turned from off to on.

10.  Tilt the fuel injectors 60 ° and inspect for the fuel leakage.

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•  If it is not within the specification, replace the fuel injector.

•  If the monitor item condition/specification (reference) is not within the specification, even though there is no malfunction, perform the 'Circuit Open/Short Inspection'.

11.  Turn the ignition switch to the LOCK position and stop the fuel pump.

12.  Inspect all parts by performing the AFTER SERVICE PRECAUTION. (See AFTER SERVICE PRECAUTION[AJ (3.0L Duratec)].)

Resistance Inspection

1.  Turn the ignition switch to the LOCK position.

2.  Disconnect the negative battery cable.

3.  Disconnect the fuel injector connector.

4.  Using a tester, inspect for the resistance between fuel injector terminals A—B.

Circuit Open/Short Inspection

1.  Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION[AJ (3.0L Duratec)].)

2.  Inspect the following wiring harness for open or short (continuity check).

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Open circuit

•  If there is no continuity, the circuit is open. Repair or replace the harness.

―  Fuel injector NO.1 terminal B and main relay terminal B

―  Fuel injector NO.1 terminal A and PCM terminal 75

―  Fuel injector NO.2 terminal B and main relay terminal B

―  Fuel injector NO.2 terminal A and PCM terminal 101

―  Fuel injector NO.3 terminal B and main relay terminal B

―  Fuel injector NO.3 terminal A and PCM terminal 74

―  Fuel injector NO.4 terminal B and main relay terminal B

―  Fuel injector NO.4 terminal A and PCM terminal 100

―  Fuel injector NO.5 terminal B and main relay terminal B

―  Fuel injector NO.5 terminal A and PCM terminal 73

―  Fuel injector NO.6 terminal B and main relay terminal B

―  Fuel injector NO.6 terminal A and PCM terminal 99

Short circuit

•  If there is continuity, the circuit is shorted. Repair or replace the harness.

―  Fuel injector NO.1 terminal B and body ground

―  Fuel injector NO.1 terminal A and power supply

―  Fuel injector NO.2 terminal B and body ground

―  Fuel injector NO.2 terminal A and power supply

―  Fuel injector NO.3 terminal B and body ground

―  Fuel injector NO.3 terminal A and power supply

―  Fuel injector NO.4 terminal B and body ground

―  Fuel injector NO.4 terminal A and power supply

―  Fuel injector NO.5 terminal B and body ground

―  Fuel injector NO.5 terminal A and power supply

―  Fuel injector NO.6 terminal B and body ground

―  Fuel injector NO.6 terminal A and power supply