Intake Air Control Valve
- Locate ACIS Intake Air Control Valve (IACV) to be tested. No. 1 IACV is located between the air intake chamber and No. 1 and 2 throttle bodies. See Fig 1. No 2 IACV is located on front of air intake chamber. See Fig 2. Install a 3-way vacuum "T" fitting in vacuum hose between IACV actuator and ACIS Vacuum Switch Valve (VSV). Connect a vacuum gauge to vacuum "T" fitting. Start engine. With engine idling, ensure vacuum is not present. See Fig 1 or Fig 2
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- Snap accelerator to Wide Open Throttle (WOT). Ensure vacuum reading momentarily reads about 7.9 in. Hg and IACV actuator rod moves. If vacuum is not as specified or actuator valve rod fails to move, go to next step.
- Remove IACV. See AIR INDUCTION SYSTEM in REMOVAL, OVERHAUL & INSTALLATION article.
Apply about 7.9 in. Hg to IACV actuator. If IACV actuator rod does not move, replace IACV actuator. If IACV actuator rod moves, check to see if diaphragm holds vacuum for at least one minute. If diaphragm does not hold vacuum, replace actuator. If diaphragm holds vacuum, check ACIS vacuum tank. See ACIS VACUUM TANK .
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002