Intake Manifold: Inspection: Inspection

INSPECT INTAKE AIR CONTROL VALVE
1. Inspect the diaphragm.
  1. Using a vacuum pump, apply a vacuum of 60 kPa (450 mmHg, 17.7 in.Hg) or higher to the diaphragm chamber. Wait for 1 minute and check that the needle of the vacuum pump does not lower.
    If the result is not as specified, replace the intake manifold.
    
    Fig 1: Inspecting Intake Air Control Valve
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. After applying vacuum in the step above, check that the actuator rod operates.
INSPECT VACUUM TANK AND CHECK VALVE
1. Disconnect the vacuum hose from the check valve.
  
  Fig 2: Inspecting Vacuum Tank And Check Valve
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Using a vacuum pump, apply vacuum to the check valve. Wait 1 minute and check that the needle of the vacuum pump does not lower.
  If the result is not as specified, replace the check valve.
3. Connect the vacuum hose to the check valve.
4. Using a vacuum pump, apply a vacuum of 60 kPa (450 mmHg, 17.7 in.Hg) or higher to the vacuum tank. Wait 1 minute and check that the needle of the vacuum pump does not lower.
  If the result is not as specified, replace the intake manifold.
  
  Fig 3: View Of Applying Vacuum To Vacuum Tank
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002