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Home >> Toyota >> 2004 >> Matrix XRS >> Repair and Diagnosis >> External Pages >> Different car >> Section 686 (Engine Control System (SFI) (3MZ-FE) - Diagnostics) >> ACIS Control Circuit >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2004 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.

Hand-held tester: 

  1. PERFORM ACTIVE TEST BY HAND-HELD TESTER (OPERATE VSV FOR IAC VALVE NO. 2) 
    1. Disconnect the vacuum hose.
    2. Connect the hand-held tester to the DLC3.
    3. Turn the ignition switch ON and push the hand-held tester main switch ON.
      Fig 1: Checking VSV Operation
      G03036000Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / INTAKE CTL VSV1. Operate the VSV.
    5. Check the VSV operation when it is operated by the hand-held tester.

      Standard: 

      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 IAC VALVE NO. 2 (OPERATION) 
    1. Check that air flows from port E to the air filter.
      Fig 2: Checking That Air Flows From Port E To Air Filter
      G03036001Courtesy 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: Applying Battery Positive Voltage Across Terminals
      G03036002Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPLACE VSV 
    2. OK : Go To Next Step. 
  3. CHECK WIRE HARNESS (VSV FOR IAC VALVE NO. 2 - ECM, VSF FOR IAC VALVE NO. 2 - EFI RELAY) 
    1. Check the wire harness between the VSV and the ECM.
      1. Disconnect the V2 VSV connector.
      2. Disconnect the E8 ECM connector.
      3. Measure the resistance of the wire harness side connectors.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      V2-2 - E8-15 (ACIS) Below 1 Ω
      V2-2 or E8-15 (ACIS) - Body ground 10 kΩ or higher
      Fig 4: Checking Wire Harness Between VSV And ECM
      G03036003Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the wire harness between the VSV and EFI relay.
      1. Disconnect the V2 VSV connector.
      2. Remove the EFI relay from the engine room J/B.
      3. Measure the resistance of the wire harness side connectors.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      V2-1 - J/B EFI relay terminal 3 Below 1 Ω
      Fig 5: Checking Wire Harness Between VSV And EFI Relay
      G03036004Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK : Go To Next Step. 
  4. CHECK VACUUM HOSES (INTAKE MANIFOLD - INTAKE AIR CONTROL VALVE, INTAKE AIR CONTROL) 

    Check that the vacuum hoses are:

    • Connected correctly.
    • Are not loose or disconnected.
    • Do not have 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 IAC VALVE NO. 2 (OPERATION) 
    1. Disconnect the VSV connector.
    2. Check operation of the VSV when battery positive voltage is applied to the terminals of the VSV.

      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 6: Checking Operation Of VSV When Battery Positive Voltage Is Applied To Terminals Of VSV
    G03036005Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPLACE VSV 
    2. OK : Go To Next Step. 
  2. CHECK ECM (ACIS VOLTAGE) 
    1. Start the engine.
    2. Measure the voltage of the ECM connectors.

      Standard 

      Fig 7: Measuring Voltage Of ECM Connectors
      G03036006Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 8: Specified Condition Table
      G03036007Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK : Go to step   4 
    2. NG : Go To Next Step. 
  3. CHECK WIRE HARNESS (VSV FOR IAC VALVE NO. 2 - ECM, VSV FOR IAC VALVE NO. 2 - EFI RELAY) 
    1. Check the wire harness between the VSV and the ECM.
      1. Disconnect the V2 VSV connector.
      2. Disconnect the E8 ECM connector.
      3. Measure the resistance of the wire harness side connectors.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      V2-2 - E8-15 (ACIS) Below 1 Ω
      V2-2 or E8-15 (ACIS) - Body ground 10 kΩ or higher
      Fig 9: Checking Wire Harness Between VSV And ECM
      G03036008Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the wire harness between the VSV and EFI relay.
      1. Disconnect the V2 VSV connector.
      2. Remove the EFI relay from the engine room J/B.
      3. Measure the resistance OF the wire harness side connectors.

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      V2-1 (VSV for ACIS) - J/B EFI relay terminal 3 Below 1 Ω
      Fig 10: Checking Wire Harness Between VSV And EFI Relay
      G03036009Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK : Go To Next Step. 
  4. CHECK VACUUM HOSES (INTAKE MANIFOLD - INTAKE AIR CONTROL VALVE, INTAKE AIR CONTROL) 

    Check that the vacuum hoses are:

    • Connected correctly.
    • Are not loose or disconnected.
    • Do not have 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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