Camry (Jan. 2003 & Later Production)
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2003 Toyota Tundra, 2003 Toyota Tacoma, 2003 Toyota Sienna, 2003 Toyota Sequoia, and 2003 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
- Acoustic Control Induction System (ACIS) uses 2 intake air control valves, one on end of air intake chamber and one near throttle body. Intake air control valve on end of air intake chamber may also be referred to as No. 2 intake air control valve. Intake air control valve near throttle body may also be referred to as No. 1 intake air control valve. Operation of actuator valve for each intake air control valve should be checked. Using 3-way connector, connect vacuum gauge in vacuum line to actuator valve for appropriate intake air control valve. See Fig 1. Actuator valve may also be referred to as the actuator.
- Connect Toyota hand-held tester to data link connector No. 3 at driver's side of instrument panel. See Figure. Start engine. Select ACTIVE TEST MODE on hand-held tester. Using hand-held tester manufacturer's instructions, activate intake air control valve Vacuum Switching Valve (VSV) and note vacuum reading. Intake air control valve VSV may also be referred to as ACIS VSV. When intake air control valve VSV is off, ensure no vacuum reading is obtained. When intake air control valve VSV is on, ensure vacuum reading momentarily reads approximately 7.9 in. Hg and actuator valve rod pulls inward. If actuator valve rod does not pull inward, go to next step. If actuator valve rod pulls inward, go to step 4.
- Disconnect vacuum hose from actuator valve. Using vacuum pump, apply 7.9 in. Hg of vacuum to actuator valve. Ensure actuator valve closes and remains closed for at least one minute. If actuator valve operates properly, reconnect vacuum hose and go to next step. 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.
- Ensure transaxle is in park. While operating accelerator pedal, monitor data monitor on hand-held tester and check open and closed status of No. 1 and No. 2 intake air control valves in relation to throttle opening percentage and engine RPM. See Fig 2. Value in illustration is only for reference, as throttle valve open position varies by engine speed. Remove hand-held tester and reconnect vacuum hose. If system operates properly, test is complete. If system does not operate as specified, check ACIS control circuit. See ACOUSTIC CONTROL INDUCTION SYSTEM CONTROL CIRCUIT under COMPUTERIZED ENGINE CONTROLS.