Engine Coolant Temperature Sensor Installation

Engine. Lexus Gs430, Gs300. Uzs190 Grs190
3Gr-Fe Engine Control System. Lexus Gs430, Gs300. Uzs190 Grs190

  1. INSTALL ENGINE COOLANT TEMPERATURE SENSOR

  2. INSTALL INTAKE MANIFOLD

  3. INSTALL INTAKE AIR SURGE TANK

  4. CONNECT FUEL MAIN TUBE

  5. CONNECT VENTILATION HOSE

  6. CONNECT UNION TO CHECK VALVE HOSE

  7. CONNECT WATER BY-PASS HOSE

  8. INSTALL AIR CLEANER CAP WITH AIR CLEANER HOSE

  9. CONNECT NO. 2 VENTILATION HOSE

  10. ADD ENGINE COOLANT

  11. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL

  12. CHECK FOR ENGINE COOLANT LEAKS

  13. CHECK FUNCTION OF THROTTLE BODY

  14. INSTALL V-BANK COVER

  15. INSTALL ENGINE ROOM SIDE COVER RH

  16. INSTALL COOL AIR INTAKE DUCT SEAL

  17. INSTALL ENGINE UNDER COVER

  18. PERFORM INITIALIZATION

  19. WARM UP ENGINE

Engine Coolant Temperature Sensor -- Installation



1. INSTALL ENGINE COOLANT TEMPERATURE SENSOR


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Install a new gasket to the sensor.

  1. Install the sensor.

    Torque:
    20 N*m{204 kgf*cm, 15 ft.*lbf}
  1. Connect the sensor connector.



2. INSTALL INTAKE MANIFOLD
  1. Set a new gasket on each cylinder head.

    NOTICE:
    1. Align the port holes of the gasket and cylinder head.
    2. Be careful of the installation direction.
  1. Set the intake manifold on the cylinder heads.



    Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fe Engine Control System.Sfi System.Engine Coolant Temperature Sensor  Installation
  1. Install and tighten the 6 bolts and 4 nuts uniformly in several steps.

    Torque:
    21 N*m{214 kgf*cm, 15 ft.*lbf}


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Install the fuel hose with the bolt.

    Torque:
    10 N*m{102 kgf*cm, 7 ft.*lbf}


3. INSTALL INTAKE AIR SURGE TANK


Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fe Engine Control System.Sfi System.Engine Coolant Temperature Sensor  Installation
  1. Install a new gasket to the intake air surge tank.

  1. Install the intake air surge tank with the 2 nuts.

    Torque:
    16 N*m{163 kgf*cm, 12 ft.*lbf}
  1. Using a 5 mm hexagon socket wrench, install the 4 bolts.

    Torque:
    18 N*m{184 kgf*cm, 13 ft.*lbf}


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Install the 2 surge tank stays with the 4 bolts.

    Torque:
    21 N*m{214 kgf*cm, 15 ft.*lbf}
  1. For Chinese specification:
    Connect the water hose joint with the bolt.

    Torque:
    10 N*m{102 kgf*cm, 7 ft.*lbf}
  1. For except Chinese specification:
    Connect the water by-pass pipe with the bolt.

    Torque:
    10 N*m{102 kgf*cm, 7 ft.*lbf}
  1. Install the 3 wire harness clamps.

  1. Connect the IACV connector.

  1. Connect the throttle motor connector.



4. CONNECT FUEL MAIN TUBE


Lexus Gs430, Gs300. Uzs190 Grs190
NOTICE:
Before installing the fuel hose's connectors to the fuel pipe, check the connector for damage and foreign matter.
  1. Connect the connector to the fuel main pipe. Push the two parts together firmly until a "click" sound is heard. Then attach the lock claws to the connector by pushing down on the connector cover.



    Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fe Engine Control System.Sfi System.Engine Coolant Temperature Sensor  Installation
  1. Check that the connector and fuel main pipe are securely connected by trying to pull them apart.



    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Install the fuel pipe clamp.



5. CONNECT VENTILATION HOSE


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Connect the ventilation hose to the ventilation valve.



6. CONNECT UNION TO CHECK VALVE HOSE
  1. Connect the hose to the surge tank.



7. CONNECT WATER BY-PASS HOSE


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Connect the 2 water by-pass hoses to the throttle body.



8. INSTALL AIR CLEANER CAP WITH AIR CLEANER HOSE


    Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fe Engine Control System.Sfi System.Engine Coolant Temperature Sensor  Installation
  1. Install the air cleaner cap with air cleaner hose with the 4 clamps and hose clamp.

    HINT:
    Be sure to install the air cleaner assembly so that the screw part of the hose clamp is as shown in the illustration.


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Install the VSV (for EVAP) to the air cleaner hose.



    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Connect the MAF meter connector and clamp to the air cleaner.



9. CONNECT NO. 2 VENTILATION HOSE


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Connect the ventilation hose to the cylinder head cover with the clamp.



10. ADD ENGINE COOLANT
  1. Tighten all the plugs and fill the radiator with TOYOTA Super Long Life Coolant (SLLC).

    Torque:
    12.7 N*m{130 kgf*cm, 9 ft.*lbf} for cylinder block drain cock plug
  1. Add engine coolant.

    Specified capacity:
    9.1 liters (9.6 US qts, 8.0 lmp. qts)
    HINT:
    1. TOYOTA vehicles are filled with TOYOTA SLLC at the factory. In order to avoid damage to the engine cooling system and other technical problems, only use TOYOTA SLLC or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite, non-borate coolant with long-life hybrid organic acid technology (coolant with long-life hybrid organic acid technology consists of a combination of low phosphates and organic acids).
    1. Please contact your TOYOTA dealer for further details.
  1. Slowly pour coolant into the radiator reservoir until it reaches the FULL line.

  1. Press the inlet and outlet radiator hoses several times by hand, and then check the level of the coolant.
    If the coolant level is low, add coolant.

  1. Install the radiator cap and reservoir cap.

  1. Bleed air from the cooling system.

    1. Warm up the engine until the thermostat opens. While the thermostat is open, circulate the coolant for several minutes.

      HINT:
      Adjust the air conditioner set temperature to MAX (HOT).
    2. Maintain the engine speed at 2,000 to 2,500 rpm.

    3. Press the inlet and outlet radiator hoses several times by hand to bleed air.

      NOTICE:
      When pressing the radiator hoses:
      1. Wear protective gloves.
      1. Be careful as the radiator hoses are hot.
      1. Keep your hands away from the radiator fan.
  1. Stop the engine, and wait until the engine coolant cools down to ambient temperature.

    CAUTION:
    Do not remove the radiator cap while the engine and radiator are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.


    Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fe Engine Control System.Sfi System.Engine Coolant Temperature Sensor  Installation
  1. Check the coolant level in the radiator reservoir.
    If the coolant level is low, add SLLC to the radiator reservoir FULL line.



11. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL


12. CHECK FOR ENGINE COOLANT LEAKS
  1. Check for engine coolant leaks (Click here).



13. CHECK FUNCTION OF THROTTLE BODY


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Check the throttle control motor operating sounds.

    1. Turn the engine switch on (IG).

    2. When pressing the accelerator pedal, check the operating sound of the running motor. Make sure that no friction noises emit from the motor.
      If friction noise exists, replace the throttle body.



  1. Check the throttle position sensor.



      Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fe Engine Control System.Sfi System.Engine Coolant Temperature Sensor  Installation
    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Push the intelligent tester main switch ON.

    4. Enter the following menus: Powertrain / Engine / Data List / Throttle Sensor Position and Throttle Position Sensor Position #2.

    5. Depress the accelerator pedal. When the throttle valve is fully opened, check that the value of the "Throttle Sensor Position" is within the specification.

      Standard throttle valve opening percentage:
      60% or more
      NOTICE:
      When checking the standard throttle valve opening percentage, the shift lever should be in the N position.
      HINT:
      If the percentage is less than 60%, replace the throttle body.


14. INSTALL V-BANK COVER


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Install the V-bank cover with the 2 nuts.

    Torque:
    5.0 N*m{51 kgf*cm, 44 in.*lbf}


15. INSTALL ENGINE ROOM SIDE COVER RH


    Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fe Engine Control System.Sfi System.Engine Coolant Temperature Sensor  Installation
  1. Install the side cover with the 2 clips and nut.



16. INSTALL COOL AIR INTAKE DUCT SEAL


    Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fe Engine Control System.Sfi System.Engine Coolant Temperature Sensor  Installation
  1. Install the intake duct seal with the 7 clips.



17. INSTALL ENGINE UNDER COVER


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Install the under cover with the 10 bolts and 3 clips.



18. PERFORM INITIALIZATION
  1. Perform initialization (Click here).

    NOTICE:
    Certain systems need to be initialized after disconnecting and reconnecting the cable from the negative (-) battery terminal.


19. WARM UP ENGINE
  1. After the engine is warmed up, check that the installed parts operate normally.