Theory Of Operation

WARNING: This page is about a different variant/trim than selected.

The base Turbocharger boost pressure is managed by the mechanical Wastegate. The Wastegate is spring loaded in the closed position. Boost pressure is applied against the spring pressure of the Wastegate to control the speed of the Turbocharger. The Wastegate Solenoid is a Pulse Width Modulated (PWM) solenoid that controls the amount of boost pressure applied against the spring pressure of the Wastegate. The way that this system operates is, boost pressure is supplied to the Wastegate Solenoid through a hose connected to the Turbocharger housing. The Powertrain Control Module (PCM) varies the PWM signal to the Wastegate Solenoid to control the amount of boost pressure applied against the Wastegate. When more boost pressure is needed, the Wastegate Solenoid will direct more of the boost pressure to atmosphere and less against the Wastegate spring.