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Home >> Lexus >> 2025 >> NX 250 FWD >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System - Service Information >> FLOW SHUTTING VALVE (for Heater) >> Removal [11/2021 - ] >> Procedure

Removal [11/2021 - ]: Procedure

  1. REMOVE FLOW SHUTTING VALVE (NO. 1 WATER BY-PASS HOSE) 

    Refer to REMOVAL [11/2021 - ] 

  2. REMOVE FLOW SHUTTING VALVE (WATER BY-PASS HOSE ASSEMBLY) 
    1. GTY1076284Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. GTY1077182Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Retainer - -
      Pull out Pull off
      1. Disconnect the outlet heater water hose connector from the No. 2 water by-pass pipe sub-assembly.
        NOTE:

        Remove any foreign matter on the No. 2 water by-pass pipe sub-assembly and outlet heater water hose connector before performing this work.

        1. Pull out the retainer to detach the lock claws and pull off the outlet heater water hose connector.
        2. Check that there is no foreign matter on the sealing surfaces of the disconnected water lines. Clean them if necessary.
        3. Cover the disconnected No. 2 water by-pass pipe sub-assembly and outlet heater water hose connector with plastic bags to prevent damage and contamination.
    3. GTY1077577Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Retainer - -
      Pull out Pull off
      1. Disconnect the inlet heater water hose connector from the flow shutting valve (water by-pass hose assembly).
        NOTE:

        Remove any foreign matter on the flow shutting valve (water by-pass hose assembly) and inlet heater water hose connector before performing this work.

        1. Pull out the retainer to detach the lock claws and pull off the inlet heater water hose connector.
        2. Check that there is no foreign matter on the sealing surfaces of the disconnected water lines. Clean them if necessary.
        3. Cover the disconnected inlet heater water hose connector with a plastic bag to prevent damage and contamination.
    4. GTY1076295Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. GTY1076293Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. GTY1076267Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Slide the clip and disconnect the flow shutting valve (water by-pass hose assembly) from the water by-pass outlet sub-assembly.

        HINT: 

        Use a container to catch any engine coolant which flows out of the flow shutting valve (water by-pass hose assembly) and water by-pass outlet sub-assembly.

    7. GTY1076261Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Slide the clip and disconnect the flow shutting valve (water by-pass hose assembly) from the transmission oil cooler.

        HINT: 

        Use a container to catch any engine coolant which flows out of the flow shutting valve (water by-pass hose assembly) and transmission oil cooler.