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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 >> Installation [03/2018 - ] >> Procedure

Installation [03/2018 - ]: Procedure

  1. INSTALL DRAIN COOLER HOSE 
    1. Align the hose notch with the rib as shown in the illustration and install the drain cooler hose to the rear cooling unit assembly.
      GTY794483Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Hose Notch
      *b Rib
  2. INSTALL AIR CONDITIONING TUBE AND ACCESSORY ASSEMBLY 
    1. Remove the vinyl tape from the air conditioning tube and accessory assembly and rear cooling unit expansion valve.
    2. Sufficiently apply compressor oil to 2 new O-rings and the fitting surface of the air conditioning tube and accessory assembly.

      Compressor Oil

      ND-OIL 11 or equivalent

    3. Install the 2 O-rings to the air conditioning tube and accessory assembly.
      NOTE:

      Keep the O-rings and O-ring fitting surfaces free of foreign matter.

    4. Connect the air conditioning tube and accessory assembly.
    5. Rotate the hook connector as shown in the illustration.
      GTY822791Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Install the bolt.

      Torque: 9.8 N*m (100 kgf*cm, 87 in.*lbf) 

    7. Install the air conditioning tube and accessory assembly with the 3 screws.
  3. INSTALL NO. 1 COOLING UNIT PACKING 
    1. Install a new No. 1 cooling unit packing.
  4. INSTALL WATER PIPE AND HOSE SUB-ASSEMBLY A 
    1. Connect the water pipe and hose sub-assembly A and engage the 2 clips within the area shown in the illustration.
      GTY836172Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a View A
      *b View B
      *c Marking (Yellow)
      *d Marking (White)
      *e Clip Installation Angle (60°)
      NOTE:

      Do not apply excessive force to the water pipe and hose sub-assembly A.

    2. Install the water pipe and hose sub-assembly A with the bolt and screw.

      Bolt 

      Torque: 9.8 N*m (100 kgf*cm, 87 in.*lbf) 

  5. INSTALL REAR AIR DUCT 
    1. Install the rear air duct with the 3 screws.
  6. INSTALL REAR AIR CONDITIONING UNIT ASSEMBLY 
    1. Engage the guide.
      GTY776253Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Install the rear air conditioning unit assembly with the 4 bolts.

      Torque: 9.8 N*m (100 kgf*cm, 87 in.*lbf) 

      HINT: 

      Tighten the bolts in the order shown in the illustration.

    3. Connect the drain cooler hose.
    4. Engage each clamp.
    5. Connect each connector.
  7. INSTALL REAR NO. 5 AIR DUCT 
    1. Connect the rear No. 5 air duct as shown in the illustration.
      GTY834430Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction (1)
      Install in this Direction (2)
    2. Install the rear No. 5 air duct with the clip.
  8. INSTALL REAR NO. 6 AIR DUCT 
    1. Connect the rear No. 6 air duct as shown in the illustration.
      GTY786676Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction
    2. Install the rear No. 6 air duct with the clip.
  9. INSTALL REAR NO. 7 AIR DUCT 
    1. Connect the rear No. 7 air duct as shown in the illustration.
      GTY826627Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction
    2. Install the rear No. 7 air duct with the clip.
  10. INSTALL REAR NO. 1 SIDE AIR DUCT 
    1. Connect the rear No. 1 side air duct as shown in the illustration.
      GTY810996Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction
    2. Install the rear No. 1 side air duct with the clip.
  11. INSTALL REAR NO. 2 SIDE AIR DUCT 
    1. Connect the rear No. 2 side air duct as shown in the illustration.
      GTY795191Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction
    2. Install the rear No. 2 side air duct with the clip.
    3. Engage the clamp.
  12. INSTALL REAR NO. 3 SIDE AIR DUCT 
    1. Connect the rear No. 3 side air duct as shown in the illustration.
      GTY781638Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction
    2. Install the rear No. 3 side air duct with the clip.
  13. INSTALL COOLER PLATE 
    1. Engage the 2 claws to install the cooler plate.
  14. INSTALL REAR NO. 4 SIDE AIR DUCT 
    1. Connect the rear No. 4 side air duct as shown in the illustration.
      GTY794731Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction (1)
      Install in this Direction (2)
    2. Install the rear No. 4 side air duct with the clip.
  15. INSTALL ROOF SIDE INNER GARNISH ASSEMBLY RH 

    HINT: 

    Use the same procedure as for the LH side.

    Refer to PROCEDURE - Step 18

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

    HINT: 

    Use the same procedure as for the LH side.

    Refer to PROCEDURE - Step 9

  17. INSTALL DECK TRIM SIDE PANEL ASSEMBLY RH 

    Refer to PROCEDURE - Step 31

  18. INSTALL NO. 1 LUGGAGE COMPARTMENT LIGHT ASSEMBLY 

    Refer to PROCEDURE - Step 3 [03/2018 - 08/2019] , or refer to PROCEDURE - Step 2 [08/2019 - ]

  19. INSTALL ROPE HOOK ASSEMBLY 

    HINT: 

    Use the same procedure as for the LH side.

    Refer to PROCEDURE - Step 24

  20. INSTALL NO. 1 LUGGAGE COMPARTMENT TRIM HOOK 

    Refer to PROCEDURE - Step 31

  21. INSTALL REAR SEAT SIDE GARNISH RH 

    HINT: 

    Use the same procedure as for the LH side.

    Refer to PROCEDURE - Step 26

  22. INSTALL FRONT DECK SIDE TRIM COVER RH 

    HINT: 

    Use the same procedure as for the LH side.

    Refer to PROCEDURE - Step 27

  23. INSTALL REAR SEAT OUTER TRACK BRACKET COVER RH 

    HINT: 

    Use the same procedure as for the LH side.

    Refer to PROCEDURE - Step 5

  24. INSTALL REAR DOOR INSIDE SCUFF PLATE RH 

    HINT: 

    Use the same procedure as for the LH side.

    Refer to PROCEDURE - Step 42

  25. INSTALL REAR DOOR SCUFF PLATE RH 

    HINT: 

    Use the same procedure as for the LH side.

    Refer to PROCEDURE - Step 43

  26. INSTALL REAR FLOOR FINISH PLATE 

    Refer to PROCEDURE - Step 53

  27. INSTALL REAR NO. 2 SEAT ASSEMBLY 

    Refer to INSTALLATION [03/2018 - ]

  28. CONNECT AIR CONDITIONING HOSE AND ACCESSORY 
    1. Connect the outlet heater water hose with the marking within the area shown in the illustration.
      GTY808631Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a View A
      *b Marking (Yellow)
      *c Outlet Heater Water Hose Installation Angle (30°)
      *d Clip Installation Angle (60°)
      NOTE:

      Do not apply excessive force to the outlet heater water hose.

    2. Engage the clip within the area shown in the illustration.
    3. Connect the inlet heater water hose with the marking within the area shown in the illustration.
      GTY796214Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a View A
      *b Marking (White)
      *c Inlet Heater Water Hose Installation Angle (30°)
      *d Clip Installation Angle (90°)
      NOTE:

      Do not apply excessive force to the inlet heater water hose.

    4. Engage the clip within the area shown in the illustration.
    5. Remove the vinyl tape from the liquid tube.
    6. Sufficiently apply compressor oil to a new O-ring and the fitting surface of the liquid tube.

      Compressor Oil

      ND-OIL 11 or equivalent

    7. Install the O-ring to the liquid tube.
      NOTE:

      Keep the O-ring and O-ring fitting surface free of foreign matter.

    8. Connect the liquid tube.
    9. Remove the vinyl tape from the suction tube.
    10. Sufficiently apply compressor oil to a new O-ring and the fitting surface of the suction tube.

      Compressor Oil

      ND-OIL 11 or equivalent

    11. Install the O-ring to the suction tube.
      NOTE:

      Keep the O-ring and O-ring fitting surface free of foreign matter.

    12. Connect the suction tube.
    13. Rotate the hook connector as shown in the illustration.
      GTY837735Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    14. Insert the tube joint into the fitting hole securely and install the bolt.

      Torque: 9.8 N*m (100 kgf*cm, 87 in.*lbf) 

  29. INSTALL NO. 1 LUGGAGE COMPARTMENT SIDE COVER PROTECTOR 
    1. Install the No. 1 luggage compartment side cover protector with the 3 clips and bolt.
    2. Move the rear wheel house liner RH to its original position as shown in the illustration.
      GTY822803Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Install the 2 screws and a new grommet.
  30. ADD ENGINE COOLANT (for Engine) 

    Refer to PROCEDURE - Step 4

  31. INSPECT FOR COOLANT LEAK (for Engine) 

    Refer to PROCEDURE - Step 1

  32. CHARGE AIR CONDITIONING SYSTEM WITH REFRIGERANT 

    See step  [03/2018 - 08/2019], or see step  [08/2019 - ]

  33. WARM UP COMPRESSOR 

    See step  [03/2018 - 08/2019], or see step  [08/2019 - ]

  34. INSPECT FOR REFRIGERANT LEAK 

    See step  [03/2018 - 08/2019], or see step  [08/2019 - ]

  35. INITIALIZATION SERVO MOTOR 

    Refer to INITIALIZATION [10/2015 - ]

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