LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2021 >> ES 300h Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (A25A-FXS) - Service Information >> Throttle Body >> Installation [06/2018 - ] >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Installation [06/2018 - ]: Procedure

  1. INSTALL THROTTLE BODY GASKET 
    1. Install a new throttle body gasket to the intake manifold with the protrusion of the throttle body gasket oriented as shown in the illustration.
      GTY743506Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Protrusion
  2. INSTALL THROTTLE BODY WITH MOTOR ASSEMBLY 

    HINT: 

    Perform "Inspection After Repair" after replacing the throttle body with motor assembly.

    Refer to INITIALIZATION [06/2018 - 07/2019] , or refer to INITIALIZATION [07/2019 - 08/2020] , or refer to INITIALIZATION [08/2020 - 08/2021] , or refer to INITIALIZATION [08/2021 - ]

    1. Connect the No. 6 water by-pass hose to the throttle body with motor assembly and slide the clip to secure it.
      GTY768851Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 45°(Claw of Clip Location)
      *b Left of Vehicle
      *c Top
      *d Paint Mark
      NOTE:
      • If the throttle body with motor assembly has been struck or dropped, replace it.
      • Make sure to position the clip as shown in the illustration.
    2. Using an 8 mm socket wrench, install the throttle body with motor assembly to the intake manifold with the 3 bolts.

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

      GTY766781Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 45°(Claw of Clip Location)
      *b Down
      *c Right of Vehicle
    3. Connect the No. 5 water by-pass hose to the throttle body with motor assembly and slide the clip to secure it.
      NOTE:

      Make sure to position the clip as shown in the illustration.

    4. Connect the throttle body with motor assembly connector.
  3. INSTALL AIR CLEANER CAP WITH AIR CLEANER HOSE 
    1. Install the air cleaner cap with air cleaner hose to the throttle body with motor assembly.
      NOTE:

      Align the cutout of the air cleaner hose assembly with the protrusion of the throttle body with motor assembly.

      GTY754557Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Protrusion
      *b Cutout
      *c Hose Clamp End
      *d Paint Mark
      *e 2 mm (0.0787 in.)
      *f 4 mm (0.157 in.)
      *g End of Hose Clamp Location
    2. Tighten the hose clamp in the position shown in the illustration.
      NOTE:

      Make sure that the end of the hose clamp is positioned as shown in the illustration.

    3. Engage the 2 guides to install the air cleaner cap sub-assembly to the air cleaner case sub-assembly.
    4. Engage the 2 air cleaner cap clamps.
    5. Connect the No. 2 ventilation hose to the cylinder head cover sub-assembly and slide the clip to secure it.
      GTY757533Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Top
      *b Front of Vehicle
      *c 45°(Claw of Clip Location)
      *d Paint Mark
      NOTE:

      Make sure to position the clip as shown in the illustration.

    6. Engage the wire harness clamp.
    7. Connect the mass air flow meter sub-assembly connector.
  4. INSTALL INLET AIR CLEANER ASSEMBLY 

    Refer to PROCEDURE - Step 18

  5. INSTALL COOL AIR INTAKE DUCT SEAL 

    Refer to PROCEDURE - Step 2 [06/2018 - 08/2021] , or refer to PROCEDURE - Step 2 [08/2021 - 09/2022] , or refer to PROCEDURE - Step 2 [09/2022 - ]

  6. INSTALL NO. 1 ENGINE COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 46 [06/2018 - 08/2021] , or refer to PROCEDURE - Step 47 [08/2021 - ]

  7. ADD ENGINE COOLANT (for Engine) 

    Refer to PROCEDURE - Step 2

  8. INSPECT FOR COOLANT LEAK (for Engine) 

    Refer to PROCEDURE - Step 1

  9. PERFORM INITIALIZATION 
    NOTE:
    • Be sure to perform this procedure after removing and reinstalling the throttle body with motor assembly or any throttle body with motor assembly components.
    • Perform the following procedure after replacing the throttle body with motor assembly or any throttle body with motor assembly components. The following procedure should also be performed if the throttle body with motor assembly is cleaned.
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Clear the DTCs.

      Powertrain > Engine > Clear DTCs 

    5. Perform "Inspection After Repair".

      Refer to INITIALIZATION [06/2018 - 07/2019] , or refer to INITIALIZATION [07/2019 - 08/2020] , or refer to INITIALIZATION [08/2020 - 08/2021] , or refer to INITIALIZATION [08/2021 - ]

    6. Put the engine in Inspection Mode (Maintenance Mode).

      Powertrain > Hybrid Control > Utility 

      Tester Display
      Inspection Mode
    7. Start the engine and check that the MIL is not illuminated. After the engine is warmed up, check that the idle speed is within the specified range with the A/C switch off.

      Standard Idle Speed

      1050 to 1150 rpm

      NOTE:
      • Be sure to perform this step with all accessories off.
      • Make sure that the shift lever is in P.
    8. Perform a road test and confirm that there are no abnormalities.