WARNING: This page is about a different car, the 2005 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT INTAKE AIR SURGE TANK
1. Inspect the diaphragm.
  1. Check that the lever moves when vacuum of 26.6 kPa (200 mmHg) is applied with the mighty bag on.
  2. Check that the vacuum of 26.6 kPa (200 mmHg) is sustained for 1 minute in the above state.
Fig 1: Inspecting Intake Air Surge Tank
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT VACUUM SWITCHING VALVE ASSY NO.1
1. Inspect the VSV for open circuit.
  1. Using an ohmmeter, check that there is continuity between each terminals.
    Resistance: 33 - 39 ohms at 20° C (68° F)
  Fig 2: Checking Continuity Between Terminals Using Ohmmeter
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect the VSV for ground.
  1. Using an ohmmeter, check that there is no continuity between each terminal and the body.
  Fig 3: Checking Continuity Between Terminal And Body Using Ohmmeter
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Inspect the VSV operation.
  1. Check that air flows from port E to the filter.
    
    Fig 4: Checking Air Flows From Port E To Filter
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Apply battery positive voltage across the terminals.
  3. Check that air flows from port E to port F.
Fig 5: Applying Battery Positive Voltage Across Terminals
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 (1 Gr-FE): Inspection

Use the Manual With the Right Hardware

When to See a Mechanic