2005 Lexus ES 330FACTORY OEM SERVICE PROCEDURE

Hand-held Tester

  1. READ VALUE OF HAND-HELD TESTER (VSV FOR AICV) 
    1. Turn the ignition switch to ON and turn the hand-held tester ON.
    2. Select the item: 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

    OK: Go to step   5 

    Fig 1: Inspecting VSV For AICV
    G02937829Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: GO TO NEXT STEP 

  2. CHECK VSV (FOR AICV) (See  INSPECTION  ) 

    NG: REPLACE INTAKE AIR CONTROL VALVE ASSY NO.3 

    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 V4 VSV for AICV connector.
      2. Disconnect the E10 ECM connector.
      3. Check the resistance between the wire harness side connectors.

      Standard (Check for open): 

      TESTER CONNECTION SPECIFICATION

      Tester Connection Specified Condition
      VSV for AICV (V4-2) - AICV (E10-33) Below 1 Ω

      Standard (Check for short): 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      Tester Connection Specified Condition
      VSV for AICV (V4-2) or AICV (E10-33) - Body ground 10 kΩ or higher
    2. Reconnect the VSV for AICV connector.
    3. Reconnect the ECM connector.
  4. Check the wire harness between the VSV for AICV and the EFI relay.
    1. Disconnect the V4 VSV for AICV connector.
    2. Remove the EFI relay from the engine room J/B.
    3. Check the resistance between the wire harness side connectors.

      Standard (Check for open): 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      VSV for AICV (V4-1) - EFI relay terminal 3 of J/B Below 1 Ω
    4. Reconnect the VSV for AICV connector.
    5. Reinstall the EFI relay.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 2: Identifying VSV For AICV Connector Terminals
    G02937830Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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.