Vacuum Switching Valve, Intake Manifold: Inspection

WARNING: This page is about a different car, the 2006 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT INTAKE AIR CONTROL VALVE ASSEMBLY (for ACIS)
1. With 39.9 kPa (300 mmHg, 11.8 in.Hg) of vacuum applied to the actuator, check that the actuator rod moves.
2. One minute after applying the vacuum in the step above, check that the actuator rod does not return.
  If the operation is not as specified, replace the intake manifold.
  
  Fig 1: Inspecting Intake Air Control Valve Assembly (For ACIS)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT VACUUM SWITCHING VALVE ASSEMBLY

Measure the resistance of the VSV.

Standard resistance

VACUUM SWITCHING VALVE

Tester Connection	Specified Condition
1 - 2	26 to 30 Ω at 20°C (68°F)
1 - Body Ground 2 - Body Ground	10 MΩ or higher

If the result is not as specified, replace the VSV assembly.

Fig 2: Inspecting Vacuum Switching Valve Assembly

Check the operation of the VSV.
1. Check that air does not flow from port E to port F.
  
  Fig 3: Checking Air Flow From Port E To Port F
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Apply battery voltage across terminals 1 and 2.
  
  Fig 4: Applying Battery Voltage Across Terminals 1 & 2
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check that air flows from port E to port F.
  If the result is not as specified, replace the VSV assembly.