For over two decades, the Toyota Vios has been the undisputed king of the B-segment sedan in Asia, the Middle East, and Latin America. Renowned for its bulletproof reliability, fuel efficiency, and low maintenance costs, the Vios is often called the "people's car." But even the most reliable machine needs regular care.
The Vios is notorious for rough idling when the IAC valve gets carboned up. The manual shows you the exact location (attached to the throttle body), the gasket to replace, and how to clean it without damaging the stepper motor. toyota vios service manual pdf