VARIABLE TUMBLE SOLENOID VALVE INSPECTION [L3 R.H.D.]

Variable Tumble Control Inspection

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

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

• RPM, ECT

3. When the engine speed signal 3,500 rpm or less and engine coolant temperature less than 60 ×C {140 ×F} (only for 2WD), verify that the variable tumble shutter valve actuator rod is pulled.

• If it does not operate, inspect the following:

(1) Rod not operating under any condition

1) Turn the ignition switch to the ON position.

2) Using a simulation function "IMRC", verify the variable tumble solenoid valve operating sound.

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

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

- Variable tumble shutter valve actuator

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

- Variable tumble solenoid valve

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

(2) Rod is operating under any condition

1) Turn the ignition switch to the ON position.

2) Using simulation function "IMRC", verify the variable tumble solenoid valve operation sound.

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

- Variable tumble shutter valve actuator

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

- Variable tumble solenoid valve

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

(3) If the operation area is different

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

- MAF

Airflow Inspection

1. Disconnect the negative battery cable.

2. Remove the variable tumble solenoid valve.

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

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

• If it is not within the specification, replace the variable tumble 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	No airflow	Airflow detected