Toyota 2GR-FE Manual page 631

Air Intake Control Circuit
DESCRIPTION
The air cleaner is equipped with two inlets, one of which is opened or closed by the Air Intake Control
Valve (AICV). This system reduces intake noise and increases engine power at low-to-high engine
speeds range.
When the engine is operating in the low-to-mid speed range, this control operates the AICV to close one
of the air cleaner inlets. When the engine speed is more than 3,600 rpm and the opening angle of the
throttle valve is more than 60°, the ECM activates the VSV and opens the AICV.
VSV
Air Cleaner Inlet
WIRING DIAGRAM
EFI MAIN
FL MAIN
Battery
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
Vacuum Tank
Air Intake Control Valve (AICV)
EFI
AICV Open (VSV: ON)
Throttle Valve
Opening Angle
60°
A53
AICV VSV
EFI No. 3
ES–475
3,600 rpm
Engine Speed
A061332E03
ECM
4
A55 AICV
44
A55
MREL
A137320E02
ES