2004 Toyota Avalon XLSFACTORY OEM SERVICE PROCEDURE

VSV For Acoustic Control Induction System (ACIS): Inspection

  1. REMOVE V-BANK COVER, AND EMISSION CONTROL VALVE SET 
  2. REMOVE VSV 
    1. Disconnect the 2 vacuum hoses from the VSV.
    2. Remove the screw and VSV.
  3. INSPECT VSV FOR OPEN CIRCUIT 

    Using an ohmmeter, check that there is continuity between each terminals.

    Resistance: 33 - 39 Ω at 20°C (68°F) 

    If there is no continuity, replace the VSV.

    Fig 1: Inspecting VSV For Open Circuit
    G02879003Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT VSV FOR GROUND 

    Using an ohmmeter, check that there is no continuity between each terminal and the body.

    If there is continuity, replace the VSV.

    Fig 2: Inspecting VSV For Ground
    G02879004Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSPECT VSV OPERATION 
    1. Check that air flows from port E to the filter.
      Fig 3: Inspecting VSV Operation
      G02879005Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Apply battery voltage across the terminals.
    3. Check that air flows from port E to port F.

    If operation is not as specified, replace the VSV.

  6. REINSTALL VSV 
    1. Install the VSV with the screw.
    2. Connect the 2 vacuum to the VSV.
    Fig 4: Checking That Air Flows From Port E To Port F
    G02879006Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. REINSTALL EMISSION CONTROL VALVE SET 
  8. REINSTALL V-BANK COVER 
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

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.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.