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Home >> Toyota >> 2007 >> Tacoma X-Runner >> Repair and Diagnosis >> Engine Performance >> Engine Control System (1GR-FE) >> SFI System >> ACIS Control Circuit >> Inspection Procedure
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Inspection Procedure

  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATE VSV FOR ACIS) 
    1. Disconnect the vacuum hose.
    2. Connect an intelligent tester to the DLC3.
    3. Turn the ignition switch ON and turn the tester ON.
    4. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / INTAKE CTL VSV1. Operate the VSV for ACIS.
    5. Check the VSV operation when it is operated using an intelligent tester.
      Fig 1: Checking VSV Operation
      G05197990Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK 

      TESTER OPERATIONS AND SPECIFIED CONDITIONS

      Tester Operations Specified Conditions
      VSV ON Air from port E flows out through port F
      VSV OFF Air from port E flows out through air filter
    6. Reconnect the vacuum hose.

    OK:  Go to step  4

    NG: Go to Next Step 

  2. CHECK VSV FOR ACIS (OPERATION) 
    1. Check that air flows from port E to the air filter.
      Fig 2: Checking Air Flows From Port To Air Filter
      G05197991Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Apply positive battery voltage across the terminals.
    3. Check that air flows from port E to port F.
      4. Fig 3: Applying Positive Battery Voltage Across Terminals
      G05197992Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE VSV FOR ACIS 

    OK: Go to Next Step 

  3. CHECK HARNESS AND CONNECTOR (VSV FOR ACIS - ECM, VSV FOR ACIS - EFI RELAY) 
    1. Check the wire harness and connectors between the VSV for ACIS and ECM.
      1. Disconnect the V3 VSV for ACIS connector.
      2. Disconnect the E4 ECM connector.
      3. Check the resistance.

        Standard Resistance (Check for open) 

        TESTER CONNECTIONS AND SPECIFIED CONDITIONS

        Tester Connections Specified Conditions
        VSV for ACIS (V3-2) - ACIS (E4-33) Below 1 Ω

        Standard Resistance (Check for short) 

        TESTER CONNECTIONS AND SPECIFIED CONDITIONS

        Tester Connections Specified Conditions
        VSV for ACIS (V3-2) or ACIS (E4-33) - E1 (E6-1) 10 kΩ or higher
      4. Reconnect the VSV for ACIS connector.
      5. Reconnect the ECM connector.
        Fig 4: Identifying V3 VSV For ACIS Connector
        G05197993Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the wire harness between the VSV for ACIS and EFI relay.
      1. Disconnect the V3 VSV for ACIS connector.
      2. Remove the EFI relay from the engine room R/B.
      3. Check the resistance.

        Standard Resistance (Check for open) 

        TESTER CONNECTIONS AND SPECIFIED CONDITIONS

        Tester Connections Specified Conditions
        VSV for ACIS (V3-1) - EFI relay terminal 3 of R/B Below 1 Ω.
      4. Reconnect the VSV for ACIS connector.
      5. Reinstall the EFI relay.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  4. CHECK VACUUM HOSES (INTAKE MANIFOLD - INTAKE AIR CONTROL VALVE, INTAKE AIR CONTR) 
    1. Check that the vacuum hose is connected correctly.
    2. Check the vacuum hose for looseness and disconnection.
    3. Check the vacuum hose for cracks, holes and damage.

    NG: REPAIR OR REPLACE VACUUM HOSES 

    OK: Go to Next Step 

  5. INSPECT INTAKE AIR CONTROL VALVE (INTAKE AIR SURGE TANK) 

    NG: REPLACE INTAKE AIR CONTROL VALVE (INTAKE AIR SURGE TANK) 

    OK : REPLACE ECM 

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