WARNING: This page is about a different car, the 2007 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT INTAKE AIR CONTROL VALVE
1. Inspection procedure when applying voltage between the terminals:
  1. Disconnect the connector from the intake air control valve.
    
    Fig 1: Identifying Intake Air Control Valve
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Apply battery voltage between terminals 1 (-) and 2 (+) of the intake air control valve. Check that a clicking sound is heard from the intake air control valve.
    If the result is not as specified, replace the intake air surge tank.
    
    Fig 2: Identifying Intake Air Control Valve Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT AIR CLEANER ASSEMBLY
1. Apply 26.6 kPa (200 mmHg, 7.9 in. Hg) of vacuum to the actuator. Check if the valve rotates open, as shown in the illustration.
2. Apply vacuum for 1 minute. The actuator should continue to keep the valve open.
  If the result is not as specified, replace the air cleaner assembly.
  
  Fig 3: Applying Vacuum To Actuator
  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 Air Control System: Inspection

Use the Manual With the Right Hardware

When to See a Mechanic

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