Variable Tumble Control System (VTCS) Shutter Valve Actuator Inspection

WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Remove the air hose. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION .)
Disconnect the vacuum hose from the variable tumble control solenoid valve.
Connect a vacuum pump to the VTCS shutter valve actuator.
Apply vacuum and verify that the rod moves.
- If the rod dose not move, replace the intake manifold.
Fig 1: Variable Tumble Control Solenoid Valve Vacuum Specifications
Courtesy of MAZDA MOTORS CORP.

Fig 2: Identifying VTCS Solenoid Valve & VTCS Shutter Valve Actuator
Courtesy of MAZDA MOTORS CORP.