2006 Lexus RX 400h FWDFACTORY OEM SERVICE PROCEDURE

Throttle Body: Installation

  1. INSTALL THROTTLE BODY ASSEMBLY 
    1. Install a new throttle body gasket to the intake air connector.
      Fig 1: Identifying Throttle Body Gasket To Intake Air Connector
      G04110877Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Install the throttle body assembly with the 4 bolts.

      Torque: 11 N*m (112 kgf*cm, 8 ft.*lbf) 

      Fig 2: Identifying Throttle Body Assembly With Bolts
      G04110878Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Connect the fuel vapor feed hose (A).
    4. Connect the water bypass hose No.3 (B).
    5. Connect the water bypass hose No.2 (C).
    6. Connect the throttle motor connector (D).
      Fig 3: Identifying Fuel Vapor Feed Hose
      G04110879Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSTALL AIR CLEANER CASE W/ RESONATOR 
    1. Install the air cleaner hose No.1 to the throttle body assembly with the hose clamp.
      Fig 4: Identifying Air Cleaner Hose No.1 To Throttle Body Assembly With Hose Clamp
      G04110880Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Install the air cleaner case w/ resonator with the 5 bolts.

      Torque: 5.0 N*m (51 kgf*cm, 44 in.*lbf) 

      Fig 5: Identifying Air Cleaner Case W/ Resonator With Bolts
      G04110881Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Connect the MAF meter connector.
    4. Connect the 2 wire harness clamps to the air cleaner.
      Fig 6: Identifying Wire Harness Clamps To Air Cleaner
      G04110882Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Connect the ventilation hose No.2.
      Fig 7: Identifying Ventilation Hose No.2
      G04110883Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSTALL AIR CLEANER CAP W/ INLET 
    1. Install a new air cleaner element to the air cleaner case.
    2. Install the air cleaner cap w/ inlet with the 4 clamps.
    3. Install the air cleaner cap w/ inlet with the 2 bolts.

      Torque: 7.0 N*m (71 kgf*cm, 62 in.*lbf) 

      Fig 8: Identifying Air Cleaner Cap W/ Inlet With Bolts
      G04110884Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSTALL COOL AIR INTAKE DUCT SEAL (See  INSTALLATION  ) 
  5. ADD COOLANT (See  COOLANT  ) 
  6. CHECK FOR ENGINE COOLANT LEAKS (See  COOLING SYSTEM  ) 
  7. INSTALL COWL TOP PANEL SUB-ASSEMBLY OUTER (See  INSTALLATION  ) 
  8. INSTALL WINDSHIELD WIPER MOTOR AND LINK ASSEMBLY (See  INSTALLATION  ) 
  9. INSTALL COWL TOP VENTILATOR LOUVER SUBASSEMBLY 
  10. INSTALL FRONT WIPER ARM AND BLADE ASSEMBLY LH (See  INSTALLATION  ) 
  11. INSTALL FRONT WIPER ARM AND BLADE ASSEMBLY RH (See  INSTALLATION  ) 
  12. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL 
  13. INSTALL ENGINE ROOM COVER SIDE (See  INSTALLATION  ) 
  14. INSTALL ENGINE ROOM SIDE LH COVER (See  INSTALLATION  ) 
  15. PERFORM INITIALIZATION 

    Some system need initialization when reconnecting the battery cable. (See INITIALIZATION )

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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