Camry 3.0L V6, Celica & Matrix
WARNING: This page does not describe the selected car, but rather 17 other vehicles, including the 2003 Toyota Tundra, 2003 Toyota Tacoma, 2003 Toyota Sienna, 2003 Toyota Sequoia, and 2003 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
Air Intake Control System (AICS) reduces engine noise in low-speed ranges and increases engine performance in high-speed ranges by dividing air cleaner inlet into 2 stages. When engine is operating in low-to-mid speed range, AICS operates air intake control valve to close one side of air cleaner inlet. See Fig 1. When engine is operating in high-speed range, AICS operates air intake control valve to open both sides of air cleaner inlet to supply intake air. Air intake control valve operation is controlled by a vacuum controlled actuator. See Fig 1. Engine Control Module (ECM) controls Air Intake Control Valve (AICV) Vacuum Switching Valve (VSV) which controls vacuum supply from vacuum tank to the actuator. See Fig 1.