Engine Coolant Temperature Sensor Removal

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

  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

  2. REMOVE COOL AIR INTAKE DUCT SEAL

  3. REMOVE ENGINE UNDER COVER

  4. DRAIN ENGINE COOLANT

  5. REMOVE ENGINE ROOM SIDE COVER RH

  6. REMOVE V-BANK COVER

  7. DISCONNECT NO. 2 VENTILATION HOSE

  8. REMOVE AIR CLEANER CAP WITH AIR CLEANER HOSE

  9. DISCONNECT WATER BY-PASS HOSE

  10. DISCONNECT HEATER WATER INLET HOSE

  11. REMOVE ENGINE REAR COVER

  12. DISCONNECT UNION TO CHECK VALVE HOSE

  13. DISCONNECT VENTILATION HOSE

  14. DISCONNECT FUEL MAIN TUBE

  15. REMOVE INTAKE AIR SURGE TANK

  16. REMOVE INTAKE MANIFOLD

  17. REMOVE ENGINE COOLANT TEMPERATURE SENSOR

Engine Coolant Temperature Sensor -- Removal



1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.


2. REMOVE COOL AIR INTAKE DUCT SEAL


Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fse Engine Control System.Sfi System.Engine Coolant Temperature Sensor Removal

  1. Remove the 7 clips and duct seal.



3. REMOVE ENGINE UNDER COVER


Lexus Gs430, Gs300. Uzs190 Grs190

  1. Using a clip remover, remove the 3 clips.

  1. Remove the 10 screws and under cover.



4. DRAIN ENGINE COOLANT
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.

  1. Remove the radiator cap and reservoir cap.



  1. Loosen the radiator drain cock plug and 2 cylinder block drain cock plugs. Then drain the coolant.

    HINT:
    Collect the coolant in a container and dispose of it according to the regulations in your area.


    Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fse Engine Control System.Sfi System.Engine Coolant Temperature Sensor Removal



5. REMOVE ENGINE ROOM SIDE COVER RH


Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fse Engine Control System.Sfi System.Engine Coolant Temperature Sensor Removal

  1. Loosen the nut and remove the 2 clips and side cover.



6. REMOVE V-BANK COVER


Lexus Gs430, Gs300. Uzs190 Grs190

  1. Remove the 2 nuts and V-bank cover.



7. DISCONNECT NO. 2 VENTILATION HOSE


Lexus Gs430, Gs300. Uzs190 Grs190

  1. Disconnect the ventilation hose from the cylinder head.



8. REMOVE AIR CLEANER CAP WITH AIR CLEANER HOSE


    Lexus Gs430, Gs300. Uzs190 Grs190

  1. Disconnect the MAF meter connector.

  1. Disconnect the clamp from the air cleaner.



    Lexus Gs430, Gs300. Uzs190 Grs190

  1. Disconnect the VSV (for EVAP).



    Lexus Gs430, Gs300. Uzs190 Grs190

  1. Disconnect the 4 clamps.

  1. Remove the hose clamp and air cleaner cap with air cleaner hose.



9. DISCONNECT WATER BY-PASS HOSE


Lexus Gs430, Gs300. Uzs190 Grs190

  1. Disconnect the 2 water by-pass hoses from the throttle body.



10. DISCONNECT HEATER WATER INLET HOSE


Lexus Gs430, Gs300. Uzs190 Grs190

  1. Disconnect the hose from the water hose joint.



11. REMOVE ENGINE REAR COVER


Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fse Engine Control System.Sfi System.Engine Coolant Temperature Sensor Removal

  1. Remove the 3 clips and engine rear cover.



12. DISCONNECT UNION TO CHECK VALVE HOSE


Lexus Gs430, Gs300. Uzs190 Grs190

  1. Disconnect the hose from the surge tank.



13. DISCONNECT VENTILATION HOSE


Lexus Gs430, Gs300. Uzs190 Grs190

  1. Disconnect the ventilation hose from the ventilation valve.



14. DISCONNECT FUEL MAIN TUBE


    Lexus Gs430, Gs300. Uzs190 Grs190

  1. Remove the fuel pipe clamp.



    Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fse Engine Control System.Sfi System.Engine Coolant Temperature Sensor Removal

  1. Pinch and pull the fuel tube's connector to disconnect it from the fuel main pipe.

    NOTICE:
    1. Check for foreign matter in the fuel tube around the fuel tube's connector. Clean it if necessary. Foreign matter can affect the O-ring's ability to seal the connector and fuel main pipe.
    2. Do not use any tools to separate the connector and pipe.
    3. Do not forcefully bend or twist the hose.
    4. Keep the connector and pipe free from foreign matter.
    5. If the connector and pipe are stuck together, pinch the connector and turn it carefully to disconnect it.

    6. Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fse Engine Control System.Sfi System.Engine Coolant Temperature Sensor Removal
      Put the connector in a plastic bag to prevent damage and contamination.


15. REMOVE INTAKE AIR SURGE TANK



Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fse Engine Control System.Sfi System.Engine Coolant Temperature Sensor Removal

  1. Disconnect the throttle motor connector.

  1. Disconnect the IACV connector.

  1. Disconnect the wire harness clamp from the surge tank.

  1. Remove the 2 bolts and intake manifold stay.

  1. Disconnect the 2 wire harness clamps from the surge tank stays.

  1. Remove the 4 bolts and 2 surge tank stays.

  1. Remove the bolt and disconnect the water hose joint.



    Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fse Engine Control System.Sfi System.Engine Coolant Temperature Sensor Removal

  1. Using a 5 mm hexagon socket wrench, remove the 7 bolts, 2 nuts and gasket.

    HINT:
    Cover the intake manifold port to prevent foreign matter from entering it.


16. REMOVE INTAKE MANIFOLD


Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fse Engine Control System.Sfi System.Engine Coolant Temperature Sensor Removal

  1. Disconnect the DC motor connector for the SCV.

  1. Disconnect the SCV position sensor connector.

  1. Remove the 4 bolts, 4 nuts, intake manifold and gasket.

    HINT:
    Cover the cylinder head intake port to prevent foreign matter from entering it.


17. REMOVE ENGINE COOLANT TEMPERATURE SENSOR


Lexus Gs430, Gs300. Uzs190 Grs190

  1. Disconnect the sensor connector.

  1. Remove the sensor.

  1. Remove the gasket from the sensor.