VARIABLE INTAKE AIR SOLENOID VALVE INSPECTION [L3 R.H.D.]

Variable Intake Air Control Inspection

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

2. Using PID/data monitoring function, monitor the following PCM input signal.

• RPM

Note

• Since the variable intake air shutter valve actuator rod has a cover, the rod cannot be detected visually from the outer-side. Therefore, when inspecting the actuator, verify the movement of the rod using a mirror inserted from under the actuator.

3. When the engine speed is approx. 4,750 rpm or less, verify that the variable intake air shutter valve actuator rod is pulled.

• If it does not operate, inspect the following:

(1) When the rod does not operate under any condition

1) Turn the ignition switch to the ON position.

2) Verify the operation sound of the variable intake air solenoid valve using the simulation function "IMTV."

• If the operation sound can be confirmed, inspect for the following:

- Vacuum hose disconnection or damage (intake manifold- variable intake air solenoid valve- variable intake air shutter valve actuator)

- Variable intake air shutter valve actuator

• If the operation sound cannot be verified, inspect the following:

- Variable intake air solenoid valve

- Wiring harnesses, connectors: open circuit (main relay- variable intake air solenoid valve-PCM)

(2) Rod operates under any condition

1) Turn the ignition switch to the ON position.

2) Using the simulation function "IMTV", verify the operation sound of the variable intake air solenoid valve.

• If the operation sound can be confirmed, inspect the following:

- Variable intake air shutter valve actuator

• If the operation sound cannot be verified, inspect the following:

- Variable intake air solenoid valve

- Wiring harnesses, connectors: open circuit (variable intake air solenoid valve-PCM)

(3) If the operation range is different

• PCM terminal voltage (using a PID/data monitor function)

- MAF

Airflow Inspection

1. Disconnect the negative battery cable.

2. Remove the variable intake air solenoid valve.

3. Inspect for airflow between the ports under the following condition.

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

• If it is not within the specification, replace the variable intake air solenoid valve.

Standard

Measurement condition	Airflow
	Between ports A-B	Between ports B-C
Apply B+ to terminal A, and connect terminal B to ground	Airflow detected	No airflow
Apply B+ to terminal A, and not connecting terminal B to ground	Airflow detected	No airflow