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Home >> Lexus >> 2020 >> LS 500h AWD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heating / Air Conditioning System - Service Information (4 Of 4) >> HEATER WATER PUMP (for AWD) >> Removal [10/2017 - ] >> Procedure

Removal [10/2017 - ]: Procedure

  1. AIR SUSPENSION CONTROL PROHIBITED (w/ Air Suspension) 

    Refer to PRECAUTION [10/2017 - ]

  2. REMOVE V-BANK COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 12 [10/2017 - 09/2018] , or refer to PROCEDURE - Step 12 [09/2018 - 09/2019] , or refer to PROCEDURE - Step 12 [09/2019 - 10/2020] , or refer to PROCEDURE - Step 12 [10/2020 - 11/2021] , or refer to PROCEDURE - Step 12 [11/2021 - 10/2022] , or refer to PROCEDURE - Step 12 [10/2022 - 10/2023] , or refer to PROCEDURE - Step 12 [10/2023 - ]

  3. REMOVE RADIATOR COVER PLATE 

    Refer to PROCEDURE - Step 1 [10/2017 - 10/2020] , or refer to PROCEDURE - Step 1 [10/2020 - 11/2021] , or refer to PROCEDURE - Step 1 [11/2021 - 10/2023] , or refer to PROCEDURE - Step 1 [10/2023 - ]

  4. REMOVE UPPER RADIATOR SUPPORT SEAL 

    Refer to PROCEDURE - Step 2 [10/2017 - 10/2020] , or refer to PROCEDURE - Step 2 [10/2020 - 11/2021] , or refer to PROCEDURE - Step 2 [11/2021 - 10/2023] , or refer to PROCEDURE - Step 2 [10/2023 - ]

  5. REMOVE LOWER RADIATOR AIR DEFLECTOR 

    Refer to PROCEDURE - Step 3 [10/2017 - 10/2020] , or refer to PROCEDURE - Step 3 [10/2020 - 11/2021] , or refer to PROCEDURE - Step 3 [11/2021 - 10/2023] , or refer to PROCEDURE - Step 3 [10/2023 - ]

  6. REMOVE NO. 1 ENGINE UNDER COVER ASSEMBLY 

    Refer to PROCEDURE - Step 23 [10/2017 - 09/2018] , or refer to PROCEDURE - Step 23 [09/2018 - 09/2019] , or refer to PROCEDURE - Step 23 [09/2019 - 10/2020] , or refer to PROCEDURE - Step 23 [10/2020 - 11/2021] , or refer to PROCEDURE - Step 23 [11/2021 - 10/2022] , or refer to PROCEDURE - Step 23 [10/2022 - 10/2023] , or refer to PROCEDURE - Step 18 [10/2023 - ]

  7. REMOVE NO. 2 ENGINE UNDER COVER ASSEMBLY 

    Refer to PROCEDURE - Step 25 [10/2017 - 09/2018] , or refer to PROCEDURE - Step 25 [09/2018 - 09/2019] , or refer to PROCEDURE - Step 25 [09/2019 - 10/2020] , or refer to PROCEDURE - Step 25 [10/2020 - 11/2021] , or refer to PROCEDURE - Step 25 [11/2021 - 10/2022] , or refer to PROCEDURE - Step 25 [10/2022 - 10/2023] , or refer to PROCEDURE - Step 20 [10/2023 - ]

  8. DRAIN ENGINE COOLANT 

    Refer to PROCEDURE - Step 8 [10/2017 - 10/2023] , or refer to PROCEDURE - Step 7 [10/2023 - ]

  9. REMOVE RADIATOR SUPPORT TO CROSSMEMBER BRACE SUB-ASSEMBLY RH 
    1. Remove the 2 bolts and radiator support to crossmember brace sub-assembly RH.
      GTY834649Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. REMOVE NO. 1 AIR CLEANER INLET 

    Refer to PROCEDURE - Step 8

  11. REMOVE AIR CLEANER ASSEMBLY 

    Refer to PROCEDURE - Step 6 [10/2017 - 09/2018] , or refer to PROCEDURE - Step 6 [09/2018 - 10/2020] , or refer to PROCEDURE - Step 7 [10/2020 - 11/2021] , or refer to PROCEDURE - Step 7 [11/2021 - 10/2022] , or refer to PROCEDURE - Step 7 [10/2022 - 10/2023] , or refer to PROCEDURE - Step 7 [10/2023 - ]

  12. DISCONNECT NO. 3 ENGINE WIRE 
    1. Remove the 2 bolts.
      GTY814645Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Detach the clamp and disconnect the No. 3 engine wire.
  13. REMOVE OIL PUMP MOTOR CONTROLLER ASSEMBLY 
    1. Detach the clamp.
      GTY814643Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 2 nuts.
    3. Move the oil pump motor controller assembly to the position shown in the illustration.
      GTY828809Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Movement Direction
  14. REMOVE HEATER ACCESSORY ASSEMBLY 
    1. Disconnect the clamp shown in the illustration.
      GTY801326Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Clamp
      Clip
    2. Using pliers, grip the claws of the 2 hose clips and slide the hose clip to disconnect the water pipe sub-assembly.
      NOTE:
      • Do not apply excessive force to the water pipe sub-assembly.
      • Prepare a drain pan or cloth in case the coolant leaks.
    3. Remove the nut.
      GTY814640Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Disconnect the connector.
      GTY780485Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Nut
      Connector
    5. Remove the 2 nuts.
    6. Move the heater accessory assembly (with water pipe sub-assembly) to the center of the engine room and remove it as shown in the illustration.
      GTY799450Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Remove in this Direction
    7. Using pliers, grip the claws of the 2 hose clips and slide the hose clip to remove the water pipe sub-assembly.
      GTY833925Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:
      • Do not apply excessive force to the water pipe sub-assembly.
      • Prepare a drain pan or cloth in case the coolant leaks.
    8. Remove the 4 hose clips from the water pipe sub-assembly.
      GTY805520Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  15. REMOVE WATER PUMP BRACKET 
    1. Remove the bolt and water pump bracket.
      GTY808787Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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