Servo Diaphragm

The servo diaphragm opens the throttle valve by the negative pressure from the 3-way solenoid valve during air conditioning and power steering operation.

The servo is also activated during power steering operation when pressures rise to a predetermined level.

On manual transaxles, the servo operates when the engine speed is 900 RPM. On automatic transaxles, the servo operates when engine speed is 1150 RPM.