VARIABLE BOOST CONTROL (VBC) VALVE ACTUATOR INSPECTION [MZ-CD 1.6 (Y6)]


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1. Remove the air hose. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)

2. Disconnect the vacuum hose from the variable boost control (VBC) valve actuator.

3. Connect a vacuum pump to the variable boost control (VBC) valve actuator.

4. Operate the hand vacuum pump and observe the reading.

• If the vacuum pump does not hold vacuum, replace the turbocharger .

5. Apply vacuum of 65 kPa {0.66 kgf/cm2, 9.4 pis} and measure the distance travelled by the vacuum diaphragm unit actuator rod.

• If the rod does not move between 9-11 mm {0.35-0.43 in}, replace the turbocharger .