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Home › Toyota › 2006 › 4Runner Limited, 4.7 T, AWD › Repair and Diagnosis › Engine Performance › System › Engine Control System SFI (2UZ-FE) Diagnostics - Component And System Inspection › IACV Control Circuit › Inspection Procedure

Inspection Procedure

  1. PERFORM ACTIVE TEST USING HAND-HELD TESTER (OPERATE VSV FOR ACIS) 
    1. Connect the hand-held tester to the DLC3.
    2. Turn the ignition switch ON and push the hand-held tester main switch ON.
    3. Select the ACTIVE TEST mode on the hand-held tester.
    4. Check the operation of the VSV when the VSV is operated by the hand-held tester.

      OK: 

      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
      G04337145Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: CHECK VACUUM TANK 

    NG: GO TO NEXT STEP. 

  2. CHECK VSV FOR ACIS (OPERATION) (See  INSPECTION  ) 

    NG: REPLACE VSV FOR ACIS 

    OK: GO TO NEXT STEP. 

  3. CHECK HARNESS AND CONNECTOR (EFI RELAY - ECM) 
    1. Check the wire harness between the VSV for ACIS and connector the ECM connector.
      1. Disconnect the V1 VSV for ACIS connector.
      2. Disconnect the E4 and E6 ECM connector.
      3. Check for resistance between the wire harness side connectors.

        Standard (Check for open): 

        SYMBOLS DESCRIPTION AND SPECIFIED CONDITION

        Symbols (Terminal No.) Specified condition
        VSV for ACIS (V1-2) - ACIS (E4-33) Below 1
        Fig 2: Identifying VSV Connector Terminals
        G04337146Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard (Check for short): 

        SYMBOLS DESCRIPTION AND SPECIFIED CONDITION

        Symbols (Terminal No.) Specified condition
        VSV for ACIS (V1-2) or ACIS (E4-33) - E1 (E6-1) 10 k or higher
      4. Reconnect the VSV connector.
      5. Reconnect the ECM connector.
    2. Check the wire harness between the VSV for ACIS connector and the EFI relay.
      1. Disconnect the V1 VSV for ACIS connector.
      2. Remove the EFI relay from the engine room R/B.
      3. Check for resistance between the wire harness side connectors.
        Fig 3: Identifying E4 & E6 ECM Connector Terminals
        G04337147Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard (Check for open): 

        SYMBOLS DESCRIPTION AND SPECIFIED CONDITION

        Symbols (Terminal No.) Specified condition
        VSV for ACIS (V1-1) - EFI relay terminal 3 of R/B Below 1
        Fig 4: Identifying EFI Relay Location
        G04337148Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Reconnect the VSV connector.
      5. Reinstall the EFI relay.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE ECM (See  ECM (2UZ-FE)  ) 

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