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Inspection Procedure

Hand-held tester: 

  1. PERFORM ACTIVE TEST BY HAND-HELD TESTER (OPERATE VSV FOR ACIS) 
    1. Disconnect the vacuum hose.
    2. Connect the hand-held tester to the DLC3.
    3. Turn the ignition switch ON and hand-held tester main switch ON.
    4. Select the item "DIAGNOSIS/ENHANCED OBD I I/ACTIVE TEST/INTAKE CTL VSV1" and operate the VSV for AICS.
    5. Check the VSV operation when it is operated by the hand-held tester.

      Standard: 

      OPERATE VSV FOR ACIS

      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
      Fig 1: Performing Active Test By Hand-Held Tester (Operate VSV For ACIS)
      G03008307Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Reconnect the vacuum hose.
    1. OK: Go to step   4 
    2. 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 E To Air Filter
      G03008308Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Apply battery positive voltage across the terminals.
    3. Check that air flows from port E to port F.
      Fig 3: Checking Air Flows From Port E To Port F
      G03008309Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE VSV FOR ACIS 
    2. OK: Go to next step. 
  3. CHECK HARNESS AND CONNECTOR (VSV FOR ACIS - ECM, VSV FOR ACIS-EFI RELAY) 
    1. Check the wire harness between the VSV for ACIS connector and the ECM connector.
      1. Disconnect the V1 VSV for ACIS connector.
        Fig 4: Disconnecting V1 VSV For ACIS Connector
        G03008310Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Disconnect the E8 ECM connector.
      3. Check the resistance between the wire harness side connectors.

        Standard (Check for open): 

        VSV FOR ACIS - ECM (CHECK FOR OPEN)

        Tester Connection Specified Condition
        VSV for ACIS (V1-2) - ACIS (E8-15) Below 1 Ω

        Standard (Check for short): 

        VSV FOR ACIS - ECM (CHECK FOR SHORT)

        Tester Connection Specified Condition
        VSV for ACIS (V1-2) or ACIS (E8-15) - Body ground 10 kΩ or higher
        Fig 5: Checking Wire Harness Between VSV For ACIS And ECM Connector)
        G03008311Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Reconnect the VSV for ACIS connector.
      5. Reconnect the ECM connector.
    2. Check the wire harness between the VSV for ACIS and the EFI relay.
      1. Inspect the EFI No. 2 fuse.
        • Remove the EFI No. 2 fuse from the fusible link block.
        • Check for continuity in the EFI No. 2 fuse.

        Standard: Continuity 

        • Reinstall the EFI No. 2 fuse.
        Fig 6: Inspecting EFI No. 2 Fuse
        G03008312Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Disconnect the V1 VSV for ACIS connector.
      3. Remove the EFI relay from the engine room R/B.
      4. Check the resistance between the wire harness side connectors.

        Standard (Check for open): 

        VSV FOR ACIS-EFI RELAY (CHECK FOR OPEN)

        Tester Connection Specified Condition
        VSV for ACIS (V1-1) - EFI relay terminal 3 of R/B Below 1 Ω
      5. Reconnect the VSV for ACIS connector.
      6. Reinstall the EFI relay.
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: Go to next step. 
  4. CHECK VACUUM HOSES (INTAKE MANIFOLD - INTAKE AIR CONTROL VALVE, INTAKE AIR CONTR) 
    1. Check that the vacuum hoses are connected correctly.
    2. Check that the vacuum hoses are not loose or disconnected.
    3. Check the vacuum hoses for cracks, holes or damage.
    1. NG: REPAIR OR REPLACE VACUUM HOSES 
    2. OK: Go to next step. 
  5. INSPECT INTAKE AIR CONTROL VALVE (See  INSPECTION  ) 
    1. NG: REPLACE INTAKE AIR CONTROL VALVE 
    2. OK: REPLACE ECM (See  REPLACEMENT  ). 

OBD II scan tool (excluding hand-held tester): 

  1. INSPECT VSV FOR ACIS (OPERATION) 
    1. Disconnect the VSV for ACIS connector.
    2. Check operation of the VSV for ACIS when battery positive voltage is applied to the terminals of the VSV for ACIS connector.

      Standard: 

      Battery positive voltage is not applied: 

      Air from port E flows out through the air filter. 

      Battery positive voltage is applied: 

      Air from port E flows out through port F. 

      Fig 7: Checking Air From Port E Flows Out Through Air Filter
      G03008313Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 8: Checking Air From Port E Flows Out Through Port F
      G03008314Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE VSV FOR ACIS 
    2. OK: Go to next step. 
  2. CHECK ECM (ACIS VOLTAGE) 
    1. Start the engine.
    2. Measure the voltage between the specified terminals of the E7 and E8 ECM connectors.

      Standard: 

      Fig 9: ECM (ACIS Voltage) Table
      G03008315Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 10: Checking ECM (ACIS Voltage)
      G03008316Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: Go to step   4 
    2. NG: Go to next step. 
  3. CHECK HARNESS AND CONNECTOR (VSV FOR ACIS - ECM, VSV FOR ACIS-EFI RELAY) 
    1. Check the wire harness between the VSV for ACIS connector and the ECM connector.
      1. Disconnect the V1 VSV for ACIS connector.
        Fig 11: Disconnecting V1 VSV For ACIS Connector
        G03008317Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Disconnect the E8 ECM connector.
      3. Check the resistance between the wire harness side connectors.

        Standard (Check for open): 

        VSV FOR ACIS - ECM (CHECK FOR OPEN)

        Tester Connection Specified Condition
        VSV for ACIS (V1-2) - ACIS (E8-15) Below 1 Ω

        Standard (Check for short): 

        VSV FOR ACIS - ECM (CHECK FOR SHORT)

        Tester Connection Specified Condition
        VSV for ACIS (V1-2) or ACIS (E8-15) - Body ground 10 kΩ or higher
        Fig 12: Checking Harness And Connector (VSV For ACIS - ECM, VSV For ACIS - EFI Relay)
        G03008318Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Reconnect the VSV for ACIS connector.
      5. Reconnect the ECM connector.
    2. Check the wire harness between the VSV for ACIS and the EFI relay.
      1. Inspect the EFI No. 2 fuse.
        • Remove the EFI No. 2 fuse from the fusible link block.
        • Check for continuity in the EFI No. 2 fuse.

        Standard: Continuity 

        • Reinstall the EFI No. 2 fuse.
        Fig 13: Inspecting EFI No. 2 Fuse
        G03008319Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Disconnect the V1 VSV for ACIS connector.
      3. Remove the EFI relay from the engine room R/B.
      4. Check the resistance between the wire harness side connectors.

        Standard (Check for open): 

        VSV FOR ACIS-EFI RELAY (CHECK FOR OPEN)

        Tester Connection Specified Condition
        VSV for ACIS (V1-1) - EFI relay terminal 3 of R/B Below 1 Ω
      5. Reconnect the VSV for ACIS connector.
      6. Reinstall the EFI relay.
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: Go to next step. 
  4. CHECK VACUUM HOSES (INTAKE MANIFOLD - INTAKE AIR CONTROL VALVE, INTAKE AIR CONTR) 
    1. Check that the vacuum hoses are connected correctly.
    2. Check that the vacuum hoses are not loose or disconnected.
    3. Check the vacuum hoses for cracks, holes or damage.
    1. NG: REPAIR OR REPLACE VACUUM HOSE 
    2. OK: Go to next step. 
  5. INSPECT INTAKE AIR CONTROL VALVE (See  INSPECTION  ) 
    1. NG: REPLACE INTAKE AIR CONTROL VALVE 
    2. OK: REPLACE ECM (See  REPLACEMENT  ). 
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