VARIABLE TUMBLE SHUTTER VALVE ACTUATOR INSPECTION [MZR 1.8, MZR 2.0, MZR 2.5]

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Operation Inspection

1.  Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION [MZR 1.8, MZR 2.0, MZR 2.5].)

2.  Remove the air hose. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR 1.8, MZR 2.0, MZR 2.5].)

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

MZR 1.8

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MZR 2.0, MZR 2.5

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4.  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.

5.  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.

Vacuum kPa {mmHg, inHg}	Rod movement
Below –2.7 {–21, –0.9}	No operate
Above –33.4 {–251, –9.89}	Fully pulled

•  When it is not possible to confirm it, replace the intake manifold. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR 1.8, MZR 2.0, MZR 2.5].)

•  When the variable tumble shutter valve actuator cannot be confirmed, check for any incorrect connections or breakage of the vacuum hose.