FUEL INJECTOR INSPECTION [L3 R.H.D.]

Fuel Injector Operation Inspection

Warning

• Fuel can ignite and cause death or serious injury, and damage. To prevent this, always make sure to follow the warnings and cautions for each procedure when repairing or inspecting.

Fuel Cut Control Inspection

1. Warm up the engine and idle it.

2. Turn off all the electrical loads and the A/C switch.

3. Using a PID/data monitor function, verify the engine speed.

4. Using a soundscope or a screwdriver, verify the fuel injector operation sound at all cylinders.

(1) Open the throttle valve and increase the engine speed to 4,000 rpm.

(2) Close the throttle valve instantaneously and verify that the fuel injector operation sound stops until the engine speed decreases to approx. 1,200 rpm, and the operation sound is heard when the engine speed is approx. 1,200 rpm or less.

• If the operation sound does not stop at all cylinders, inspect the following:

- PCM terminal voltage

• Throttle opening signal

• If the operation sound does not stop at specific cylinders, inspect the following:

- Corresponding fuel injector and related wiring harnesses and connectors

•  If the operation sound stops at all cylinders but the engine speed at which the operation sound recovers is not within the specification, inspect the following:

- PCM terminal voltage

• Load/no load detection signal

• Engine coolant temperature signal

5. Place the vehicle on a chassis dynamometer.

6. Inspect for the following:

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

(2) Verify the injector operation time using the PID/data monitor function.

(3) Depress the accelerator pedal and increase the engine speed to 2,000 rpm. (Loaded range)

(4)• When the accelerator pedal is released (brake pedal not depressed), verify that the injector actuation time of 0 ms is indicated until the engine speed decreases to approx. 1,000 rpm, and then the actuation time 2-5 ms is indicated when the engine speed decreases to approx. 1,000 rpm or less.

• If it cannot be verified, inspect the PCM terminal voltage.

- Load/no load detection signal

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.

• If it is within the specification, inspect the related harnesses.

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

Standard

11.4-12.6 ohms [20 °C {68 °F}]

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 [L3].)

2. Disconnect the negative battery cable.

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

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

5. Connect the fuel hose.

6. Connect the negative battery cable.

Caution

• Since the fuel pump may malfunction if it is operated without any fuel in the fuel tank (fuel pump idling), verify that there is sufficient fuel in the tank for fuel pump suction.

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

8. Using a simulation function FP, operate the fuel pump.

9. Tilt the fuel injector at an angle of 60 × to inspect for leakage.

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

Standard

1 drop or less/2 min

10. Turn the ignition switch to the LOCK position and disconnect the jumper wire.

11. Inspect all parts by performing the AFTER REPAIR PROCEDURE. (See AFTER SERVICE PRECAUTION [L3].)