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Air Intake Control Circuit [12/2015 - 08/2016]: Procedure

WARNING: This page is about a different car, the 2016 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
  1. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VSV FOR AICS) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for AICS.
    5. Check the operation of the vacuum switching valve (for AICS) when the vacuum switching valve (for AICS) is operated using the Techstream.
      GTY449874Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Port F
      *2 Port E
      *a Vacuum Switching Valve (for AICS) is ON
      *b Vacuum Switching Valve (for AICS) is OFF
      *c Air

      OK

      Techstream Operation Specified Condition
      ON Air from port E flows out through port F
      OFF Air from port E flows out through the air filter

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    (Refer to PROBLEM SYMPTOMS TABLE [12/2015 - 08/2016] )

    Result: 

    NG 

    See step  2

  2. CHECK VACUUM SWITCHING VALVE (FOR AICS) 
    1. Check the vacuum switching valve (for AICS) (Refer to ON-VEHICLE INSPECTION [12/2015 - 08/2016] ).

    Result: 

    NG 

    REPLACE VACUUM SWITCHING VALVE (FOR AICS) 

    Result: 

    OK 

    See step  3

  3. CHECK TERMINAL VOLTAGE (VACUUM SWITCHING VALVE (FOR AICS)) 
    1. Disconnect the vacuum switching valve (for AICS) connector.
      GTY714851Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A31-1 - Body ground Ignition switch ON 11 to 14 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Vacuum Switching Valve (for AICS))

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI NO. 2 FUSE - VACUUM SWITCHING VALVE (FOR AICS)) 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE (FOR AICS) - ECM) 
    1. Disconnect the vacuum switching valve (for AICS) 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 Condition Specified Condition
      A31-2 - B1-61 (AICV) Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A31-2 or B1-61 (AICV) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. INSPECT AIR CLEANER CAP SUB-ASSEMBLY (VACUUM SURGE TANK) 
    1. Inspect the vacuum surge tank (Refer to PROCEDURE - Step 1 ).

    Result: 

    OK 

    REPLACE ECM 

    (Refer to REMOVAL [12/2015 - 08/2016] )

    Result: 

    NG 

    REPAIR OR REPLACE AIR CLEANER CAP SUB-ASSEMBLY 

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