WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.

REMOVE VACUUM CONTROL VALVE SET
1. Disconnect the vacuum hose from the intake air control valve actuator.
2. Disconnect the VSV connector (for ACIS).
3. Disconnect the 2 vacuum hoses from the manifold and clamp.
4. Remove the bolt and harness clamp.
5. Remove the 2 nuts and vacuum control valve set.
  
  Fig 1: Locating Vacuum Control Valve Set
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE INTAKE AIR CONTROL VALVE ACTUATOR
1. Remove the 3 nuts, actuator and gasket.
  
  Fig 2: Locating Intake Air Control Valve Actuator
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE INTAKE MANIFOLD SUB-ASSEMBLY UPPER
1. Remove the 14 bolts, 6 nuts, manifold upper and gasket from the manifold lower.
  
  Fig 3: Locating Bolts, Nuts, Manifold Upper And Gasket From Manifold Lower
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE INTAKE AIR CONTROL VALVE ASSEMBLY
1. Remove the 6 bolts and control valve.
  
  Fig 4: Locating Intake Air Control Valve Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE VACUUM SWITCHING VALVE ASSEMBLY (for ACIS)
1. Remove the screw and VSV from the vacuum tank.
  
  Fig 5: Locating Valve With Bolts
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Intake Manifold: Disassembly

Use the Manual With the Right Hardware

When to See a Mechanic

Rather have a pro handle this?