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Fuel Injector Inspection

FUEL INJECTOR INSPECTION [LF]

NOTE: Perform the following inspection only when directed.

Resistance Inspection

1. Remove the battery cover.
2. Disconnect the negative battery cable.
3. Disconnect the fuel injector connector.




4. Inspect the resistance between fuel injector terminals A and B using a tester.
- 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 Degrees C {68 Degrees F}]

Circuit Open/Short Inspection




1. Disconnect the PCM connector.
2. Inspect the wiring harnesses for open or short circuit (continuity check).

Open circuit
- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
- Fuel injector No.1 terminal B and PCM terminal 2BB
- Fuel injector No.2 terminal B and PCM terminal 2BC
- Fuel injector No.3 terminal B and PCM terminal 2BD
- Fuel injector No.4 terminal B and PCM terminal 2AZ
- Fuel injector No.1 terminal A and main relay
- Fuel injector No.2 terminal A and main relay
- Fuel injector No.3 terminal A and main relay
- Fuel injector No.4 terminal A and main relay

Short circuit
- If there is continuity, there is a short circuit. Repair or replace the wiring harness.
- Fuel injector No.1 terminal El and body ground
- Fuel injector No.1 terminal B and power supply
- Fuel injector No.2 terminal B and body ground
- Fuel injector No.2 terminal B and power supply
- Fuel injector No.3 terminal Q and body ground
- Fuel injector No.3 terminal B and power supply
- Fuel injector No.4 terminal B and body ground
- Fuel injector No.4 terminal t3 and power supply
- Fuel injector No.1 terminal A and body ground
- Fuel injector No.2 terminal A and body ground
- Fuel injector No.3 terminal A and body ground
- Fuel injector No.4 terminal A 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. Before Service Precaution

2. Remove the battery cover.
3. Disconnect the negative battery cable.
4. Remove the fuel injector and fuel distributor as a single unit.




5. Fix the fuel injector to the fuel distributor with a wire or the equivalent.
6. Connect the fuel hose.
7. Start the fuel pump using the following procedure:

Using WDS or equivalent

1. Connect the negative battery cable.




2. Connect the WDS or equivalent to the DLC-2.
3. Start the fuel pump using the "FP' simulation function.

Not using WDS or equivalent




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




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

NOTE: Prepare a container to collect the gasoline.




8. Tilt the fuel injector at an angle of 24 degrees to inspect for leakage.
- If not within the specification, replace the fuel injector.

Fuel injector leakage amount Less than 1 drop/2 min

9. Stop the fuel pump using the following procedure:

Using WDS or equivalent
1. Stop the fuel pump using the "FP" simulation function.

Not using WDS or equivalent
1. Turn the ignition switch to off to stop the fuel pump.

10. Remove the battery cover.
11. Disconnect the negative battery cable.
12. Remove the wire or equivalent securing the fuel injector.
13. Install the fuel injector.
14. Complete the "'AFTER SERVICE PRECAUTION". After Service Precaution

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. Before Service Precaution

2. Remove the battery cover.
3. Disconnect the negative battery cable.
4. Remove the fuel injector.
5. Connect the fuel injector to the fuel injector tester.
6. Start the fuel pump using the following procedure:

Using WDS or equivalent
1. Connect the negative battery cable.
2. Connect the WDS or equivalent to the DLC-2.
3. Start the fuel pump using the "FP" simulation function.

Not using WDS or equivalent
1. Short the check connector terminal F/P to ground using a jumper wire.




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

7. Measure the injection volume of each fuel injector.
- If not within the specification, replace the fuel injector.

Fuel injection volume: 204-216 ml {204-216 cc, 12.5-13.1 cu in}/min




8. Turn the ignition switch to off to stop the fuel pump.
9. Install the fuel injector.
10. Complete the "AFTER SERVICE PRECAUTION". After Service Precaution

Atomization Inspection




1. Inspect the atomization status.
- If not normal, replace the fuel injector.
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