Mazda 3 Service Manual: Variable Tumble Shutter Valve Actuator Inspection [Mzr 2.0, Mzr 2.5]

Operation Inspection

1. Remove the air hose..

2. Disconnect the vacuum hose from the variable tumble shutter valve actuator.

3. Connect a vacuum pump to the variable tumble shutter valve actuator.

NOTE:

• Covered with a hood, the rod of the variable tumble shutter valve actuator cannot be seen from above. Use a mirror from under it to check the operation of the variable tumble shutter valve.

4. Check if the rod operates correctly as stated in the table when a gradual negative pressure is applied to the variable tumble shutter valve actuator.

• When it is not possible to confirm it, replace the intake manifold..

• When the variable tumble shutter valve actuator cannot be activated even though the operation of the rod can be confirmed, check for any incorrect connections or breakage of the vacuum hose.