FUEL INJECTOR INSPECTION [F2]

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Simulation Test

1.  Carry out the “Fuel Injector Operation Inspection”. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [F2].)

•  If not as specified, perform the further inspection for the fuel injectors.


Resistance Inspection

Note
•  Perform the following test only when directed.

1.  Disconnect the negative battery cable.

2.  Disconnect the fuel injector connectors.

3.  Measure the resistance of the fuel injector.

•  If not as specified, replace the fuel injector.(See FUEL INJECTOR REMOVAL/INSTALLATION [F2].)
•  If as specified but “Simulation Test” is failed, inspect for the following:

Fuel injector resistance
13.5—14.1 ohms [20 °C {68 °F}]
Open circuit
•  GND circuit (No.1 cylinder fuel injector connector terminal B and PCM connector terminal 2U)
•  GND circuit (No.2 cylinder fuel injector connector terminal B and PCM connector terminal 2V)
•  GND circuit (No.3 cylinder fuel injector connector terminal B and PCM connector terminal 2U)
•  GND circuit (No.4 cylinder fuel injector connector terminal B and PCM connector terminal 2V)
•  Power circuit (No.1 cylinder fuel injector connector terminal A and main relay connector terminal D through common connector)
•  Power circuit (No.2 cylinder fuel injector connector terminal A and main relay connector terminal D through common connector)
•  Power circuit (No.3 cylinder fuel injector connector terminal A and main relay connector terminal D through common connector)
•  Power circuit (No.4 cylinder fuel injector connector terminal A and main relay connector terminal D through common connector)
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Short circuit
•  No.1 cylinder fuel injector connector terminal B and PCM connector terminal 2U to GND
•  No.2 cylinder fuel injector connector terminal B and PCM connector terminal 2V to GND
•  No.3 cylinder fuel injector connector terminal B and PCM connector terminal 2U to GND
•  No.4 cylinder fuel injector connector terminal B and PCM connector terminal 2V to GND

4.  Repair or replace faulty areas.

5.  Reconnect the fuel injector connectors.

6.  Reconnect the negative battery cable.


Fuel Leakage Test

Warning
•  Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Always carry out the following procedure with the engine stopped.
Note
•  Perform the following test only when directed.

1.  Complete the “BEFORE REPAIR ROCEDURE”. (See BEFORE REPAIR PROCEDURE [F2].)

2.  Disconnect the negative battery cable.

3.  Remove the fuel injectors together with the fuel distributor. (See FUEL INJECTOR REMOVAL/INSTALLATION [F2].)

4.  Fasten the fuel injectors firmly to the fuel distributor with wire.

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5.  Start the fuel pump using the following procedure:

Using M-MDS
1.  Connect the negative battery cable.
2.  Connect the M-MDS to the DLC-2.
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3.  Start the fuel pump using the “FP” simulation function.
Caution
•  Connecting the wrong DLC terminal may possibly cause a malfunction. Carefully connect the specified terminal only.
Not using M-MDS
1.  Short the DLC terminal F/P to body ground using a jumper wire.
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2.  Connect the negative battery cable.
3.  Turn the ignition switch to the ON position, to operate the fuel pump.

6.  Tilt the fuel injectors approx. 60 ° and verify that fuel leakage from the fuel injector nozzles is within the specification.

•  If not as specified, replace the fuel injector.
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Fuel leakage
Less than 1 drop/2 min

7.  Stop the fuel pump using the following procedure:

Using M-MDS
1.  Stop the fuel pump using the “FP” simulation function.
Not using M-MDS
1.  Turn the ignition switch to off to stop the fuel pump.

8.  Complete the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [F2].)


Volume Test

Warning
•  Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Always carry out the following procedure with the engine stopped.
Note
•  Perform the following test only when directed.

1.  Complete the “BEFORE REPAIR PROCEDURE”. (See BEFORE REPAIR PROCEDURE [F2].)

2.  Disconnect the negative battery cable.

3.  Remove the fuel injectors together with the fuel distributor. (See FUEL INJECTOR REMOVAL/INSTALLATION [F2].)

4.  Fasten the fuel injectors firmly to the fuel distributor with wire.

5.  Connect the SST as shown in the figure.

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6.  Start the fuel pump using the following procedure:

Using M-MDS
1.  Connect the negative battery cable.
2.  Connect the M-MDS to the DLC-2.
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3.  Start the fuel pump using the “FP” simulation function.
Caution
•  Connecting the wrong DLC terminal may possibly cause a malfunction. Carefully connect the specified terminal only.
Not using M-MDS
1.  Short the DLC terminal F/P to body ground using a jumper wire.
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2.  Connect the negative battery cable.
3.  Turn the ignition switch to the ON position, to operate the fuel pump.

7.  Measure the injection volume of each fuel injector using a graduated container.

•  If not as specified, replace the fuel injector.
Injection volume
204—216 ml {204—216 cc, 6.9—7.3 fl oz}/min

8.  Stop the fuel pump using the following procedure:

Using M-MDS
1.  Stop the fuel pump using the “FP” simulation function.
Not using M-MDS
1.  Turn the ignition switch to off to stop the fuel pump.

9.  Complete the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [F2].)