VACUUM LINE INSPECTION [MZ-CD 1.4 DI Turbo, MZ-CD 1.6 (Y6)]

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1.  Remove the vacuum hose. (See VACUUM HOSE REMOVAL/INSTALLATION [MZ-CD 1.4 DI Turbo].) (See VACUUM HOSE REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)

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2.  Verify that air flows through to the vacuum pump side when blown by mouth from the vacuum hose of the power brake unit, and that air does not flow through to the power brake unit when blown in the opposite direction from the vacuum pump.

•  If there is any malfunction in the inner area of the check valve, replace it together with the vacuum hose as a single unit.

3.  Install the vacuum hose. (See VACUUM HOSE REMOVAL/INSTALLATION [MZ-CD 1.4 DI Turbo].) (See VACUUM HOSE REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)