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Home >> Toyota >> 2004 >> Sienna CE >> Repair and Diagnosis >> Engine Performance >> Engine Control System (SFI) - Diagnosis >> Air Intake Control Circuit >> Inspection Procedure >> Hand-held Tester:
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Hand-held Tester:

  1. READ VALUE OF HAND HELD TESTER (VSV FOR AICV) 
    1. Turn the ignition switch ON and the hand held tester main switch 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.
      Fig 1: Checking VSV Operation
      G02933330Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER OPERATION 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
    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 V2 VSV for AICV connector.
        2. Fig 2: Identifying VSV Connector Terminals For Checking Continuity
        G02933331Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Disconnect the E8 ECM connector.
        3. Fig 3: Disconnecting E8 ECM Connector
        G02933332Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Check for continuity between the wire harness side connectors.

        Standard (Check for open): 

        SYMBOL SPECIFIED CONDITION

        Symbols (Terminal No.) Specified condition
        VSV for AICV (V2-2) - AICV (E8-33) Continuity

        Standard (Check for short): 

        SYMBOLS SPECIFIED CONDITION

        Symbols (Terminal No.) Specified condition
        VSV for AICV (V2-2) or AICV (E8-33) - E1 (E6-1) No continuity
      4. Reconnect the VSV for AICV connector.
      5. Reconnect the ECM connector.
    2. Check the wire harness between the VSV for AICV and the EFI relay.
      1. Disconnect the V2 VSV for AICV connector.
      2. Remove the EFI relay from the engine room J/B.
      3. Check for continuity between the wire harness side connectors.

        Standard (Check for open): 

        SYMBOLS SPECIFIED CONDITION

        Symbols (Terminal No.) Specified condition
        VSV for AICV (V2-1) - EFI relay terminal 3 of J/B Continuity
      4. Reconnect the VSV for AICV connector.
      5. Reinstall the EFI relay.
        Fig 4: Reinstalling EFI Relay
        G02933333Courtesy 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 
    2. OK: CHECK AND REPLACE ECM (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
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