FUEL INJECTOR INSPECTION[LF, L3]

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Resistance Inspection

1.  Turn the ignition switch to the LOCK position.

2.  Remove the battery cover. (See BATTERY REMOVAL/INSTALLATION[LF, L3].)

3.  Disconnect the negative battery cable.

4.  Disconnect the fuel injector connector.

5.  Inspect the resistance between fuel injector terminals A and B using a tester.

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•  If within the specification, perform the “Circuit Open/Short Inspection”.
•  If not within the specification, replace the fuel injector.
Fuel injector resistance
11.4—12.6 ohms [20 °C {68 °F}]


Circuit Open/Short Inspection

1.  Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION[LF, L3].)

2.  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 harness.
―  Fuel injector No.1 terminal A and PCM terminal 2BB
―  Fuel injector No.2 terminal A and PCM terminal 2BC
―  Fuel injector No.3 terminal A and PCM terminal 2BD
―  Fuel injector No.4 terminal A and PCM terminal 2AZ
―  Fuel injector No.1 terminal B and main relay terminal A
―  Fuel injector No.2 terminal B and main relay terminal A
―  Fuel injector No.3 terminal B and main relay terminal A
―  Fuel injector No.4 terminal B and main relay terminal A
Short circuit
•  If there is continuity, the circuit is short. Repair or replace the harness.
―  Fuel injector No.1 terminal A and power supply
―  Fuel injector No.1 terminal A and body ground
―  Fuel injector No.2 terminal A and power supply
―  Fuel injector No.2 terminal A and body ground
―  Fuel injector No.3 terminal A and power supply
―  Fuel injector No.3 terminal A and body ground
―  Fuel injector No.4 terminal A and power supply
―  Fuel injector No.4 terminal A and body ground
―  Fuel injector No.1 terminal B and body ground
―  Fuel injector No.2 terminal B and body ground
―  Fuel injector No.3 terminal B and body ground
―  Fuel injector No.4 terminal B and body ground


Leakage Inspection

Warning
•  Fuel line spills and leakage from the pressurized fuel system are dangerous. Fuel can ignite and cause serious injury or death and damage. To prevent this, complete the following inspection with the engine stopped.

1.  Follow “BEFORE SERVICE PRECAUTION” before performing any work operations to prevent fuel from spilling from the fuel system. (See BEFORE SERVICE PRECAUTION[LF, L3].)

2.  Remove the battery cover. (See BATTERY REMOVAL/INSTALLATION[LF, L3]].)

3.  Disconnect the negative battery cable.

4.  Remove the fuel injector and fuel distributor as a single unit. (See FUEL INJECTOR REMOVAL/INSTALLATION[LF, L3].)

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

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6.  Connect the fuel hose.

7.  Connect the negative battery cable.

8.  Connect the M-MDS to the DLC-2.

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9.  Turn the ignition switch to the ON position.

10.  Using the simulation function “FP”, start the fuel pump.

11.  Tilt the fuel injector at an angle of 42° to inspect for leakage.

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•  If not within the specification, replace the fuel injector.
Fuel injector leakage
1 drop or less/2 min

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

13.  Remove the wire or the equivalent securing the fuel injector.

14.  Install the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION[LF, L3].)

15.  Inspect all related parts by performing “AFTER SERVICE PRECAUTION”. (See AFTER SERVICE PRECAUTION[LF, L3].)


Injection Volume Inspection

Warning
•  Fuel line spills and leakage from the pressurized fuel system are dangerous. Fuel can ignite and cause serious injury or death and damage. To prevent this, complete the following inspection with the engine stopped.

1.  Follow “BEFORE SERVICE PRECAUTION” before performing any work operations to prevent fuel from spilling from the fuel system. (See BEFORE SERVICE PRECAUTION[LF, L3].)

2.  Remove the battery cover. (See BATTERY REMOVAL/INSTALLATION[LF, L3].)

3.  Disconnect the negative battery cable.

4.  Remove the PCM.

5.  Connect the PCM connector.

6.  Remove the fuel injector and fuel distributor as a single unit. (See FUEL INJECTOR REMOVAL/INSTALLATION[LF, L3].)

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

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8.  Connect the corresponding fuel injector connector.

9.  Connect the negative battery cable.

10.  Connect the M-MDS to the DLC-2.

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11.  Turn the ignition switch to the ON position.

12.  Using the simulation function “FP”, start the fuel pump.

13.  Ground the following PCM terminals using a jumper wire and measure the injection volume of each fuel injector.

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•  If not within the specification, replace the fuel injector.
Injection volume
46—66 ml {44—66 cc, 2.8—4.0 cu in}/15 s

Fuel injector No.

PCM terminal
1
2BB
2
2BC
3
2BD
4
2AZ

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

15.  Remove the wire or the equivalent securing the fuel injector.

16.  Install the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION[LF, L3].)

17.  Inspect all related parts by performing “AFTER SERVICE PRECAUTION”. (See AFTER SERVICE PRECAUTION[LF, L3].)


Atomization Inspection

1.  Inspect the atomization status.

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•  If not normal, replace the fuel injector.