Turbo Control Actuator

WARNING: This page is about a different car, the 1995 Mazda RX-7. However, it is still accessible from the selected car via links, so may be relevant.

Ensure engine is cool. Remove hose connected to actuator. Connect air pressure source to pressure gauge. See Fig 1 . Apply air pressure to actuator.
CAUTION: DO NOT allow pressure to exceed 11 psi (.8 kg/cm² ).
Apply 7 psi (0.5 kg/cm² ) of compressed air. Ensure actuator rod moves when air pressure is applied. If actuator rod does not move, replace control actuator.

Fig 1: Testing Turbo Control Actuator

Courtesy of MAZDA MOTORS CORP.