Variable Tumble Control System (VTCS) Shutter Valve Actuator Inspection

WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Perform the following test only when directed.

Disconnect the vacuum hose from the VTCS shutter valve actuator.
Connect a vacuum pump to the VTCS shutter valve actuator.
Apply vacuum slowly and inspect the rod movement of the VTCS shutter valve actuator under the following conditions:
- If not as specified, replace the VTCS shutter valve actuator. (See VARIABLE TUMBLE CONTROL SYSTEM (VTCS) SHUTTER VALVE ACTUATOR REMOVAL/INSTALLATION .)
- If as specified but the Simulation Test failed, inspect for the following:
  - Vacuum hose improper routing, kinks or leakage.