IMT (Intake Manifold Tuning) Valve Inspection

Connect special tool (A) to IMT valve (1).
Special Tool
1. 09917-47011
  
  Fig 1: Connecting Special Tool To IMT Valve
  Courtesy of SUZUKI OF AMERICA CORP.
Apply vacuum to IMT valve (1) and verify that throttle (2) fully closes within the specified range. If IMT valve (1) fails this check, replace it.
CAUTION: Do not apply above 88 kPa (0.88 kg/cm² , 661 mm Hg, 880 mbar) of negative pressure. Damage may occur to IMT valve (1).

IMT valve operation pressure

1.3-34 kPa (0.01-0.34 kg/cm ² , 9.8-255 mm Hg, 13-340 mbar)
Let the throttle (2) close for 15 seconds with no vacuum application and inspect throttle travel. If throttle travel decreases, replace IMT valve (1).