so I removed my engine cover to clean underneath and notice this yellow part was unplugged now I'm spaced about what it could be and have no idea please help!!
Thank you
Gs300 AWD 2006

 

Electronic ACIS (Acoustic Control Induction System)
Pressure fluctuations are indirectly created in the intake manifold by the intake stroke. The influence exerted on the subsequent intake stroke
by the pressure fluctuations remaining in the intake manifold, even after the intake valve has closed, is called a pulsation effect. When the
pressure fluctuations that remain after the intake valve has closed coincides with the subsequent intake stroke, the pressure increases at the
time the valve opens, the intake air volume increases, and the torque increases.

To proactively utilize this pulsation effect, the Acoustic Control Induction System changes the effective intake manifold length in accordance
with the cycle of the pulsation flow that changes with the engine speed, in order to increase the torque in all ranges.

 

Thanks you for the information, I'm just wondering why is was unplugged and if it's in working condition.