High pitch buzzing noise from Throttle body
 

My car is a 2006 Hawkeye STI with DBW Throttle Body.

My throttle body has recently developed a constant high pitch buzzing noise when you turn the ignition on. It usually does it for a couple of seconds then stops. But it's now doing it all the same. So I replaced it but still get the noise ����

Exactly the same noise as in this video;


Does anyone know what is causing this constant noise and how I can fix it please?

Bump....

Check all the earth leads on :
Battery to body
Earth on Inlet Manifold
Earths on struts to engine
Earth above starter motor