Camry Solara

Acoustic Control Induction System (ACIS) uses intake air control valve on end of air intake chamber. Using 3-way connector, connect vacuum gauge in vacuum line to actuator valve. See Fig 1. Actuator valve is located at end of air intake chamber and may also be referred to as the actuator.
Start engine. With engine idling, ensure no vacuum reading is obtained. Fully open throttle and ensure vacuum reading momentarily reads approximately 7.9 in. Hg and actuator valve rod pulls out. If actuator valve rod does not pull out, go to next step. If actuator valve rod pulls out, system is operating properly.
Disconnect vacuum hose from actuator valve. Using vacuum pump, apply 7.9 in. Hg of vacuum to actuator valve. Ensure actuator valve rod pulls out and remains pulled out for at least one minute. See Fig 2. If actuator valve operates properly, reconnect vacuum hose. Check ACIS control circuit. See ACOUSTIC CONTROL INDUCTION SYSTEM CONTROL CIRCUIT under COMPUTERIZED ENGINE CONTROLS. If actuator valve does not operate properly, replace intake air control valve assembly. See INTAKE AIR CONTROL VALVE under AIR INDUCTION SYSTEMS in REMOVAL & INSTALLATION - V6 & V8 article.

Fig 1: Locating Intake Air Control Valve & Checking Actuator Valve Operation (Camry Solara)

Fig 2: Inspecting Intake Air Control Valve (Camry Solara)