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Home >> Toyota >> 2011 >> Highlander Hybrid Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 42 (Engine Control System (1AR-FE) (Diagnostic Codes (P1604 - U0101) & Circuit Tests)) >> SFI System >> Air Intake Control Circuit >> Procedure

Air Intake Control Circuit: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VSV FOR AICS) 
    1. Disconnect the 2 hoses from the VSV for air intake control valve.
      Fig 1: Checking VSV Operation
      GTY169223Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the ignition switch to ON and turn the Techstream on.
    3. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for AICS.
    4. Check the operation of the VSV when the VSV is operated by the Techstream.

      Standard

      Techstream 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

    NG → See step   4 

    OK: Go to next step 

  2. INSPECT VACUUM TANK 
    1. Inspect the vacuum tank, refer to ON-VEHICLE INSPECTION .

    NG → REPLACE AIR CLEANER CAP SUB-ASSEMBLY 

    OK: Go to next step 

  3. INSPECT INTAKE AIR CONTROL VALVE ASSEMBLY 
    1. Inspect the intake air control valve assembly, refer to ON-VEHICLE INSPECTION .

    NG → REPLACE NO. 3 INTAKE AIR CONTROL VALVE ASSEMBLY 

    OK → See step   7 

  4. INSPECT VACUUM SWITCHING VALVE (VSV FOR AICV) 
    1. Inspect the VSV for air intake control valve, refer to ON-VEHICLE INSPECTION .

    NG → REPLACE NO. 3 INTAKE AIR CONTROL VALVE ASSEMBLY 

    OK: Go to next step 

  5. CHECK HARNESS AND CONNECTOR (VSV FOR AICV VOLTAGE) 
    1. Disconnect the VSV for air intake control valve connector.
    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
      A10-1 - Body ground Ignition switch ON 11 to 14 V

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI NO. 3 FUSE - VSV FOR AIR INTAKE CONTROL VALVE) 

    OK: Go to next step 

  6. CHECK HARNESS AND CONNECTOR (VSV FOR AIR INTAKE CONTROL VALVE - ECM) 
    1. Disconnect the VSV for air intake control valve 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
      A10-2 - B51-35 (AICV) Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A10-2 or B51-35 (AICV) - Body ground Always 10 kΩ or higher
    4. Reconnect the ECM connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   8 

  7. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
  8. REPLACE ECM. Refer to  REMOVAL 
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