2005 Toyota Avalon LimitedFACTORY OEM SERVICE PROCEDURE

Inspection Procedure

  1. PERFORM ACTIVE TEST USING HAND-HELD TESTER (VSV FOR AICV) 
    1. Turn the ignition switch on (IG) and turn the hand-held 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 hand-held tester.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION

      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: Checking Operation Of VSV
      G02976396Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: Go to step   4 . 
    2. NG: Go to next step. 
  2. CHECK VSV(FOR AICV) (SEE  INSPECTION  ) 
    1. NG: REPLACE INTAKE AIR CONTROL VALVE ASSY NO. 3 
    2. 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 (Check for open): 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for AICV (A13-2) - AICV (B45-27) Below 1 Ω
        Fig 2: Identifying Connector
        G02976397Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard (Check for short): 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for AICV (A13-2) or AICV (B45-27) - Body ground 10 kΩ or higher
      4. Reconnect the ECM connector.
        Fig 3: Connecting ECM Connector
        G02976398Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 (Check for open): 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Specified Condition
        VSV for AICV (A13-1) - engine room junction block (EFI relay) (1D-5) Below 1 Ω
      3. Reconnect the VSV for AICV connector.
      4. Reinstall the engine room junction block.
        Fig 4: Locating Engine Room Junction Block
        G02976399Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: Go to next step. 
  4. INSPECT VACUUM TANK (SEE  INSPECTION  ) 
    1. NG: REPAIR OR REPLACE AIR CLEANER CAP 
    2. OK: REPLACE ECM (SEE  REPLACEMENT  ) 
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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