The actuator is tested with a hand operated vacuum pump.
Testing is performed with the engine off (not running) as follows:
1. Operate wastegate lever by hand. Lever should move back and forth freely without bind or drag.
2. Disconnect vacuum line at actuator and connect vacuum pump to actuator.
3. Apply 5 inches vacuum to actuator and note action.
Actuator rod should close wastegate smoothly. If rod fails to move, release vacuum and proceed to next step.
4. Disconnect actuator rod at wastegate lever. Apply 5 inches vacuum to actuator, and note rod operation. If rod fails to move replace actuator. But if rod does move wastegate valve or lever is binding. Free up lever with heat valve lubricant. Replace turbocharger if wastegate valve is seized or binding.
