Vacuum Passage Inspection
WARNING: This page is about a different car, the 2006 Suzuki XL-7. However, it is still accessible from the selected car via links, so may be relevant.
Start engine and run it at idle speed. With finger placed against vacuum nozzle (1), check that vacuum is applied.
If it is not applied, clean vacuum passage by blowing compressed air.
Courtesy of SUZUKI OF AMERICA CORP.