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Home >> Lexus >> 2011 >> RX 350 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System SFI System [2GR-FE] (Diagnostic Codes & Circuit Tests) >> SFI System >> Circuit Tests >> ACIS Control Circuit >> Procedure
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ACIS Control Circuit: Procedure

  1. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VSV FOR INTAKE CONTROL) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for Intake Control.
    5. Check if operating noise can be heard when operating the intake air control valve assembly using the Techstream.

      OK

      Operating noise can be heard.

    NG → See step   2 

    OK → See step   5 

  2. CHECK INTAKE AIR SURGE TANK ASSEMBLY (INTAKE AIR CONTROL VALVE ASSEMBLY OPERATION) 
    1. Disconnect the intake air control valve assembly connector.
      Fig 1: Intake Air Control Valve Assembly Connector
      GTY357778Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Apply battery voltage between the terminals of the intake air control valve assembly connector.
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Intake Air Control Valve Assembly)
    3. Check the intake air control valve assembly operation.

      OK

      Operating noise can be heard.

    4. Reconnect the intake air control valve assembly connector.

    NG → See step   6 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (INTAKE AIR CONTROL VALVE ASSEMBLY VOLTAGE) 
    1. Disconnect the intake air control valve assembly connector.
      Fig 2: Intake Air Control Valve Assembly Connector
      GTY348495Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      D5-2 - Body ground Engine switch on (IG) 11 to 14 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Intake Air Control Valve Assembly)
    4. Reconnect the intake air control valve assembly connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI NO. 2 FUSE - INTAKE AIR CONTROL VALVE ASSEMBLY) 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (INTAKE AIR CONTROL VALVE ASSEMBLY - ECM) 
    1. Disconnect the intake air control valve assembly 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
      D5-1 - D1-62 (ACIS) Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      D5-1 or D1-62 (ACIS) - Body ground Always 10 kΩ or higher
    4. Reconnect the intake air control valve assembly connector.
    5. Reconnect the ECM connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (INTAKE AIR CONTROL VALVE ASSEMBLY - ECM) 

    OK → See step   7 

  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
  6. REPLACE INTAKE AIR SURGE TANK ASSEMBLY. Refer to  REMOVAL 
  7. REPLACE ECM. Refer to  REMOVAL 
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