Avalon V6-3.5L (2GR-FE) (2006)
3. Check that there is ventilation from the booster to the engine, and no ventilation from the engine to the booster.
4. If any fault is found, replace the vacuum check valve.
3. Check that there is ventilation from the booster to the engine, and no ventilation from the engine to the booster.
4. If any fault is found, replace the vacuum check valve.