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Home >> Lexus >> 2018 >> RX 450h Base >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning System (Service Information) (1 Of 2) >> Rear Air Conditioning Unit >> Removal [08/2019 - ] >> Procedure

Removal [08/2019 - ]: Procedure

  1. RECOVER REFRIGERANT FROM REFRIGERATION SYSTEM 

    See step  1

  2. DRAIN ENGINE COOLANT (for Engine) 

    Refer to PROCEDURE - Step 3

  3. REMOVE NO. 1 LUGGAGE COMPARTMENT SIDE COVER PROTECTOR 
    1. Remove the 2 screws and grommet.
      GTY818423Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Screw
      Grommet
    2. Turn back the rear wheel house liner RH as shown in the illustration.
      GTY805584Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Remove the clip.
      GTY822776Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Remove the 2 clips, bolt and No. 1 luggage compartment side cover protector.
      GTY804303Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Clip
      Bolt
  4. DISCONNECT AIR CONDITIONING HOSE AND ACCESSORY 
    1. Remove the bolt and rotate the hook connector as shown in the illustration.
      GTY822774Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the suction tube.
      GTY822780Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Remove the O-ring from the suction tube.
      NOTE:

      Seal the openings of the disconnected parts using vinyl tape to prevent entry of moisture and foreign matter.

    4. Disconnect the liquid tube.
      GTY822779Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Remove the O-ring from the liquid tube.
      NOTE:

      Seal the openings of the disconnected parts using vinyl tape to prevent entry of moisture and foreign matter.

    6. Using pliers, grip the claws of the clip and slide the clip to disconnect the inlet heater water hose.
      GTY837736Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:
      • Do not apply excessive force to the inlet heater water hose.
      • Prepare a drain pan or cloth in case the coolant leaks.
    7. Using pliers, grip the claws of the clip and slide the clip to disconnect the outlet heater water hose.
      GTY822777Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:
      • Do not apply excessive force to the outlet heater water hose.
      • Prepare a drain pan or cloth in case the coolant leaks.
  5. REMOVE REAR NO. 2 SEAT ASSEMBLY 

    Refer to REMOVAL [03/2018 - ]

  6. REMOVE REAR FLOOR FINISH PLATE 

    Refer to PROCEDURE - Step 10

  7. REMOVE REAR DOOR SCUFF PLATE RH 

    HINT: 

    Use the same procedure as for the LH side.

    Refer to PROCEDURE - Step 13

  8. REMOVE REAR DOOR INSIDE SCUFF PLATE RH 

    HINT: 

    Use the same procedure as for the LH side.

    Refer to PROCEDURE - Step 14

  9. REMOVE REAR SEAT OUTER TRACK BRACKET COVER RH 

    HINT: 

    Use the same procedure as for the LH side.

    Refer to PROCEDURE - Step 8

  10. REMOVE FRONT DECK SIDE TRIM COVER RH 

    HINT: 

    Use the same procedure as for the LH side.

    Refer to PROCEDURE - Step 27

  11. REMOVE REAR SEAT SIDE GARNISH RH 

    HINT: 

    Use the same procedure as for the LH side.

    Refer to PROCEDURE - Step 28

  12. REMOVE NO. 1 LUGGAGE COMPARTMENT TRIM HOOK 

    Refer to PROCEDURE - Step 26

  13. REMOVE ROPE HOOK ASSEMBLY 

    HINT: 

    Use the same procedure as for the LH side.

    Refer to PROCEDURE - Step 30

  14. REMOVE NO. 1 LUGGAGE COMPARTMENT LIGHT ASSEMBLY 

    Refer to PROCEDURE - Step 2

  15. REMOVE DECK TRIM SIDE PANEL ASSEMBLY RH 

    Refer to PROCEDURE - Step 34

  16. DISCONNECT REAR NO. 2 SEAT OUTER BELT ASSEMBLY RH 

    HINT: 

    Use the same procedure as for the LH side.

    Refer to PROCEDURE - Step 22

  17. REMOVE ROOF SIDE INNER GARNISH ASSEMBLY RH 

    HINT: 

    Use the same procedure as for the LH side.

    Refer to PROCEDURE - Step 36

  18. REMOVE REAR NO. 4 SIDE AIR DUCT 
    1. Remove the clip.
      GTY798702Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Remove in this Direction (1)
      Remove in this Direction (2)
    2. Remove the rear No. 4 side air duct as shown in the illustration.
  19. REMOVE COOLER PLATE 
    1. Disengage the 2 claws to remove the cooler plate.
      GTY823526Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  20. REMOVE REAR NO. 3 SIDE AIR DUCT 
    1. Remove the clip.
      GTY807256Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Remove in this Direction
    2. Remove the rear No. 3 side air duct as shown in the illustration.
  21. REMOVE REAR NO. 2 SIDE AIR DUCT 
    1. Disengage the clamp.
      GTY790448Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Remove in this Direction
    2. Remove the clip.
    3. Remove the rear No. 2 side air duct as shown in the illustration.
  22. REMOVE REAR NO. 1 SIDE AIR DUCT 
    1. Remove the clip.
      GTY833122Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Remove in this Direction
    2. Remove the rear No. 1 side air duct as shown in the illustration.
  23. REMOVE REAR NO. 7 AIR DUCT 
    1. Remove the clip.
      GTY817982Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Remove in this Direction
    2. Remove the rear No. 7 air duct as shown in the illustration.
  24. REMOVE REAR NO. 6 AIR DUCT 
    1. Remove the clip.
      GTY781013Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Remove in this Direction
    2. Remove the rear No. 6 air duct as shown in the illustration.
  25. REMOVE REAR NO. 5 AIR DUCT 
    1. Remove the clip.
      GTY828796Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Remove in this Direction (1)
      Remove in this Direction (2)
    2. Remove the rear No. 5 air duct as shown in the illustration.
  26. REMOVE REAR AIR CONDITIONING UNIT ASSEMBLY 
    1. Disconnect each connector.
      GTY822784Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disengage each clamp.
    3. Disconnect the drain cooler hose.
      GTY837738Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Remove the 4 bolts.
    5. Disengage the guide and remove the rear air conditioning unit assembly.
  27. REMOVE REAR AIR DUCT 
    1. Remove the 3 screws and rear air duct.
      GTY805131Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  28. REMOVE WATER PIPE AND HOSE SUB-ASSEMBLY A 
    1. Remove the bolt and screw.
      GTY812729Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Bolt
      Screw
    2. Slide the 2 clips and disconnect the water pipe and hose sub-assembly A.
      GTY822790Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:
      • Do not apply excessive force to the water pipe and hose sub-assembly A.
      • Prepare a drain pan or cloth in case the coolant leaks.
  29. REMOVE NO. 1 COOLING UNIT PACKING 
    1. Remove the No. 1 cooling unit packing.
      GTY822787Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  30. REMOVE AIR CONDITIONING TUBE AND ACCESSORY ASSEMBLY 
    1. Remove the bolt and rotate the hook connector as shown in the illustration.
      GTY822785Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 3 screws and air conditioning tube and accessory assembly.
    3. Remove the 2 O-rings from the rear cooling unit expansion valve.
      NOTE:

      Seal the openings of the disconnected parts using vinyl tape to prevent entry of moisture and foreign matter.

  31. REMOVE DRAIN COOLER HOSE 
    1. Remove the drain cooler hose from the rear cooling unit assembly.
      GTY822792Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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