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Home >> Toyota >> 2007 >> Avalon XL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - System And Circuit Testing, On-Vehicle Inspection, Removal, Inspection And Installation >> ACIS Control Circuit >> Inspection Procedure
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Inspection Procedure

  1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (OPERATE VSV FOR ACIS) 
    1. Connect the intelligent tester to the DLC3.
    2. Start the engine and turn the intelligent tester on.
    3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / INTAKE CTL VSV1. Operate the VSV for AICS.

      OK: 

      Operational noise can be heard. 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE 

    NG: Go to Next Step 

  2. CHECK INTAKE AIR CONTROL VALVE (OPERATION) 
    1. Disconnect the air intake valve connector.
    2. Apply battery voltage between the terminals of the VSV for ACIS.
    3. Check the air intake valve operation.

      OK: 

      Operational noise can be heard. 

    Fig 1: Identifying VSV For ACIS Connector Terminals
    G04996523Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    NG: REPLACE INTAKE AIR SURGE TANK 

    OK: Go to Next Step 

  3. CHECK HARNESS AND CONNECTOR (VSV FOR ACIS - ECM, VSV FOR ACIS - EFI NO. 2 RELAY) 
    1. Check the wire harness and connectors between the VSV for ACIS and ECM.
      1. Disconnect the VSV for ACIS connector.
      2. Disconnect the ECM connector.
      3. Measure the resistance according to the value(s) in the table below.

        Standard resistance (Check for open) 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connections Specified Conditions
        VSV for ACIS (B18-1) - ACIS (B45-33) Below 1 Ω

        Standard resistance (Check for short) 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connections Specified Conditions
        VSV for ACIS (B18-1) or ACIS (B45-33) - E1 (B47-1) 10 kΩ or higher
      4. Reconnect the VSV for ACIS connector.
      5. Reconnect the ECM connector.
    2. Check the wire harness between the VSV for ACIS and EFI relay.
      1. Disconnect the VSV for ACIS connector.
      2. Remove the EFI No. 2 fuse from the engine room R/ B.
      3. Measure the resistance according to the value(s) in the table below.

        Standard resistance (Check for open) 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connections Specified Conditions
        VSV for ACIS (B18-2) - Engine Room R/B (EFI No. 2 relay) (2) Below 1 Ω
      4. Reconnect the VSV for ACIS connector.
      5. Reinstall the EFI No. 2 fuse.
    Fig 2: Identifying VSV For ACIS And EFI No. 2 Fuse Connector Terminals
    G04996524Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE ECM 

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