FUEL INJECTOR INSPECTION [L8, LF, L3]

Operation Test

1. Carry out the "Fuel Injector Operation Inspection". (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L8, LF, L3].)

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

Resistance Inspection

Note

• Perform the following test only when directed.

1. Turn the ignition switch to LOCK position.

2. Disconnect the negative battery cable.

3. Disconnect the fuel injector connectors.

4. Measure the resistance of the fuel injector using an ohmmeter.

• If not as specified, replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L8, LF, L3].)

• If as specified but "Operation Test" is failed, carry out the "Circuit Open/Short Inspection". Inspect for open or short circuit.

11.4-12.6 ohms [20 °C {68 °F}]

Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [L8, LF, L3].)

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

Open circuit

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

- No.1 cylinder fuel injector terminal A (harness-side) and PCM terminal 2BB.

- No.2 cylinder fuel injector terminal A (harness-side) and PCM terminal 2BC.

- No.3 cylinder fuel injector terminal A (harness-side) and PCM terminal 2BD.

- No.4 cylinder fuel injector terminal A (harness-side) and PCM terminal 2AZ.

- No.1 cylinder fuel injector terminal B (harness-side) and main relay (harness-side) terminal C through common connector.

- No.2 cylinder fuel injector terminal B (harness-side) and main relay (harness-side) terminal C through common connector.

- No.3 cylinder fuel injector terminal B (harness-side) and main relay (harness-side) terminal C through common connector.

- No.4 cylinder fuel injector terminal B (harness-side) and main relay (harness-side) terminal C through common connector.

Short circuit

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

- No.1 cylinder fuel injector terminal A (harness-side) and body GND.

- No.2 cylinder fuel injector terminal A (harness-side) and body GND.

- No.3 cylinder fuel injector terminal A (harness-side) and body GND.

- No.4 cylinder fuel injector terminal A (harness-side) and body GND.

- No.1 cylinder fuel injector terminal B (harness-side) and power supply.

- No.2 cylinder fuel injector terminal B (harness-side) and power supply.

- No.3 cylinder fuel injector terminal B (harness-side) and power supply.

- No.4 cylinder fuel injector terminal B (harness-side) and power supply.

Fuel Leakage Inspection

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 [L8, LF, L3].)

2. Disconnect the negative battery cable.

3. Remove the fuel injectors together with the fuel distributor with the fuel hose connected. (See FUEL INJECTOR REMOVAL/INSTALLATION [L8, LF, L3].)

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

5. Connect the negative battery cable.

Caution

• Connecting the wrong check connector terminal may possibly cause malfunction. Carefully connect the specified terminal only.

6. Start the fuel pump using the following procedure.

1. Connect the WDS or equivalent to the DLC-2.

2. Using the simulation function "FP", start the fuel pump.

1. Short the check connector terminal F/P to body GND using a jumper wire.

2. Turn the ignition switch to ON position to operate the fuel pump.

7. Tilt the fuel injectors approx. 42 degrees.

8. Verify that fuel leakage from the fuel injector nozzles is within the specification.

• If not as specified, replace the fuel injector.

Less than 1 drop/2 minutes

9. Stop the fuel pump using the following procedure.

Using WDS or equivalent

1. Stop the fuel pump using the "FP" simulation function.

Without Using WDS or equivalent

1. Disconnect the negative battery cable to stop the fuel pump.

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

11. Install the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L8, LF, L3].)

12. Complete the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE [L8, LF, L3].)

Volume Inspection

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

• If there is an after market fuel injector tester, perform the following test.

• If there is no an after market fuel injector tester, perform "Operation Test", "Resistance Inspection", and "Fuel Leakage Test" to verify the fuel injector is okay or not.

1. Complete the "BEFORE REPAIR PROCEDURE". (See BEFORE REPAIR PROCEDURE [L8, LF, L3].)

2. Disconnect the negative battery cable.

3. Remove the PCM.

4. Connect the PCM connector.

5. Remove the fuel injector and fuel distributor as a single unit. (See FUEL INJECTOR REMOVAL/INSTALLATION [L8, LF, L3].)

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

7. Connect the corresponding fuel injector connector.

8. Connect the negative battery cable.

9. Connect the WDS or equivalent to the DLC-2.

10. Turn the ignition switch to the ON position.

11. Using the simulation function "FP", start the fuel pump.

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

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

66-85 ml {66-85 cc, 2.3-2.8 fl oz}/15 s

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

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

15. Install the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L8, LF, L3].)

16. Complete the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE [L8, LF, L3].)

Atomization

1. Inspect atomization pattern.

• If the atomization is faulty, replace the fuel injector.