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Home >> Lexus >> 2021 >> LX 570 >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Control System (Service Information) >> Throttle Body >> Installation [09/2015 - ] >> Procedure
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Installation [09/2015 - ]: Procedure

  1. INSTALL THROTTLE BODY ASSEMBLY 
    1. Install the 2 water by-pass hoses to the throttle body.
    2. Install a new gasket to the intake air surge tank.
      GTY539577Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      Align the protrusion of the gasket with the groove of the intake air surge tank.

    3. Install the throttle body with the 4 bolts.
      GTY588680Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf) 

      HINT: 

      Perform "Inspection After Repairs" after replacing the throttle body assembly (Refer to INITIALIZATION [09/2015 - ] ).

    4. Connect the throttle position sensor and control motor connector.
      GTY611129Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Connect the 2 water by-pass hoses.
  2. INSTALL AIR CLEANER HOSE ASSEMBLY 

    Refer to PROCEDURE - Step 10

  3. ADD ENGINE COOLANT 

    Refer to PROCEDURE - Step 6

  4. INSPECT FOR COOLANT LEAK 

    Refer to PROCEDURE - Step 1

  5. CHECK THROTTLE BODY ASSEMBLY 

    See step  1

  6. INSTALL NO. 1 ENGINE UNDER COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 19

  7. INSTALL FRONT FENDER SPLASH SHIELD SUB-ASSEMBLY LH 

    Refer to PROCEDURE - Step 15

  8. INSTALL FRONT FENDER SPLASH SHIELD SUB-ASSEMBLY RH 

    Refer to PROCEDURE - Step 16

  9. PERFORM INITIALIZATION 
    NOTE:

    Perform the following procedure after replacing the ECM, throttle body assembly or any throttle body components. The following procedure should also be performed if the throttle body is cleaned.

    1. Turn the ignition switch to ON without operating the accelerator pedal.
      NOTE:

      If the accelerator pedal is operated, perform the above steps again.

    2. Connect the Techstream to the DLC3 and clear the DTCs (Refer to DTC CHECK / CLEAR [09/2015 - ] ).
    3. Perform the "Inspection After Repairs" (Refer to INITIALIZATION [09/2015 - ] ).
    4. Start the engine and check that the MIL is not illuminated and that the idle speed is within the specified range when the A/C is switched off after the engine is warmed up.

      Standard

      Condition Engine Idle Speed
      A/C switched off 650 to 750 rpm
      NOTE:
      • Be sure to perform this step with all accessories off.
      • Make sure that the shift lever is in N of P.
    5. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Throttle Sensor Volt %. Fully depress the accelerator pedal and check that the value is 60% or more.
    6. Perform a road test and confirm that there are no abnormalities.
  10. INSTALL V-BANK COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 69

  11. INSTALL UPPER RADIATOR SUPPORT SEAL 

    Refer to PROCEDURE - Step 14

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