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Home >> Toyota >> 2004 >> Highlander Limited, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control System (SFI) - Diagnostics (3MZ-FE) >> ACIS Control Circuit >> Inspection Procedure >> Hand held tester:

Hand held tester:

  1. PERFORM ACTIVE TEST USING 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.
    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.
      Fig 1: Checking VSV Operation
      G02908533Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: 

      Tester operation and specified condition table

      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.
      2. Fig 2: Checking Air Flow From Port E To Air Filter
      G02908534Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Apply battery positive voltage across the terminals.
    3. Check that air flows from port E to port F.
      4. Fig 3: Checking Air Flow From Port E To Port F
      G02908535Courtesy 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 ECM.
      1. Disconnect the V2 VSV connector.
      2. Disconnect the E7 ECM connector.
      3. Check the resistance of the wire harness side connectors.
        4. Fig 4: Checking Wire Harness Between VSV And ECM
        G02908536Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      Tester condition and specified condition table

      Tester Connection Specified Condition
      V2-2 - E7-15 (ACIS) Below 1 Ω
      V2-2 or E7-15 (ACIS) - Body ground 10 kΩ or higher
    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. Check the resistance of the wire harness side connectors.
        4. Fig 5: Checking Wire Harness Between VSV And EFI Relay
        G02908537Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      Tester condition and specified condition table

      Tester Connection Specified Condition
      V2-1 - J/B EFI relay terminal 3 Below 1 Ω
    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) 
    1. 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 NO. 2 (See  INSPECTION  ) 
    1. NG: REPLACE INTAKE AIR CONTROL VALVE NO. 2 
    2. OK: REPLACE ECM (See  REPLACEMENT  ) 
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