2006 Toyota Avalon XLSFACTORY OEM SERVICE PROCEDURE

Inspection Procedure

  1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (VSV FOR AICV) 
    1. Turn the ignition switch on (IG) and turn the intelligent tester ON.
    2. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / INTAKE CTL VSV1 and operate the VSV for AICV.
    3. Check the operation of the VSV when the VSV is operated by the intelligent tester.

      Standard 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS

      Tester Operation Specified Condition
      VSV is ON Air from port E flows out through port F
      VSV is OFF Air from port E flows out through the air filter
      Fig 1: Testing VSV By Intelligent Tester
      G04375230Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to step   4 

    NG: Go to next step. 

  2. CHECK VSV (FOR AICV) 
    1. Inspect the intake air control valve assembly (See ON-VEHICLE INSPECTION ).

    NG: REPLACE INTAKE AIR CONTROL VALVE ASSEMBLY 

    OK: Go to next step. 

  3. CHECK HARNESS AND CONNECTOR (VSV FOR AICV - ECM, VSV FOR AICV - EFI RELAY) 
    1. Check the wire harness between the VSV for AICV connector and the ECM connector.
      1. Disconnect the A13 VSV for AICV connector.
      2. Disconnect the B45 ECM connector.
      3. Measure the resistance between the wire harness side connectors.

        Standard resistance (Check for open) 

        TESTER CONNECTIONS AND SPECIFIED CONDITIONS

        Tester Connection Specified Condition
        VSV for AICV (A13-2) - AICV (B45-27) Below 1

        Standard resistance (Check for short) 

        TESTER CONNECTIONS AND SPECIFIED CONDITIONS

        Tester Connection Specified Condition
        VSV for AICV (A13-2) or AICV (B45-27) - Body ground 10 k or higher
      4. Reconnect the ECM connector.
    2. Check the wire harness between the VSV for AICV and the EFI relay.
      1. Remove the engine room junction block.
      2. Measure the resistance between the wire harness side connectors.

        Standard resistance (Check for open) 

        TESTER CONNECTIONS AND SPECIFIED CONDITIONS

        Tester Connection Specified Condition
        VSV for AICV (A13-1) - engine room junction block (EFI relay) (1D-5) Below 1
      3. Reconnect the VSV for AICV connector.
      4. Reinstall the engine room junction block.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 2: Disconnecting B45 ECM Connector
    G04375231Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step. 

  4. INSPECT VACUUM TANK 
    1. Inspect the vacuum tank (See SYSTEM DIAGRAM ).

    NG: REPAIR OR REPLACE AIR CLEANER CAP 

    OK: REPLACE ECM 

Factory Service Tools

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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.

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