LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2019 >> LS 500 Base, RWD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heating / Air Conditioning System - Service Information (2 Of 3) >> Front Air Conditioning Unit >> Installation [10/2023 - ] >> Procedure

Installation [10/2023 - ]: Procedure

  1. PRECAUTION 
    NOTE:
    • When installing the instrument panel reinforcement with air conditioner assembly, make sure to replace the No. 1 instrument panel spacer and No. 2 instrument panel spacer with a new one.
    • If it is necessary to replace the instrument panel extension spacer, use a new one of the same color as that which was removed.
      GTY831587Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSTALL NO. 2 INSTRUMENT PANEL SPACER 
    1. Attach the claw to install 2 new No. 1 instrument panel spacers.
      GTY970059Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSTALL NO. 1 INSTRUMENT PANEL SPACER 
    1. Attach the claw to install a new No. 1 instrument panel spacer.
      GTY814522Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSTALL AIR CONDITIONER UNIT ASSEMBLY 
    NOTE:
    • Be sure to support the air conditioner unit assembly when installing it because failure to do so may cause the bracket of the air conditioner unit assembly to break.
    • When installing the air conditioner unit assembly, eliminate static electricity by touching the vehicle body to prevent the components from being damaged.
    1. Temporarily set the air conditioner unit assembly nearby the position where it is to be installed.
    2. Insert a new instrument panel reinforcement assembly into the application area of the air conditioner unit assembly as shown in the illustration.
      GTY971252Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction - -
    3. Install the 3 bolts in the order shown in the illustration.

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

    4. Attach the clamp.
      GTY970892Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSTALL ID CODE BOX (IMMOBILISER CODE ECU) 

    Refer to PROCEDURE - Step 1

  6. INSTALL LOWER DEFROSTER NOZZLE ASSEMBLY 
    1. Attach the claw to install the lower defroster nozzle assembly.
      GTY970890Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. INSTALL INSTRUMENT PANEL REINFORCEMENT ASSEMBLY WITH AIR CONDITIONING UNIT ASSEMBLY 
    NOTE:
    • Be sure to support the air conditioning unit assembly when installing it because failure to do so may cause the bracket of the air conditioning unit assembly to break.
    • When installing the air conditioning unit assembly, eliminate static electricity by touching the vehicle body to prevent the components from being damaged.
    1. Install the instrument panel reinforcement assembly with air conditioning unit assembly to the guide as shown in the illustration.
      NOTE:
      • Be careful not to damage the internal components of the instrument panel reinforcement assembly and air conditioning unit assembly on the glass etc. Only perform installation after first taking the appropriate actions.
      • Make sure that both parts are securely installed to the guide.
      • Be sure to hold the air conditioning unit assembly by the case when carrying it.(Do not carry the air conditioning unit by holding the heater pipe, cooler pipe, servo motor, brushless motor, harness, air inlet door or link.)
      • Do not subject the air conditioning harness assembly connector to any strong impacts.
      GTY970770Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      After inserting it to the end, install the guide - -
    2. Install the cooler pipe grommet.
      GTY813984Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Make sure that the dash panel is securely inserted into the groove of the cooler pipe grommet without any gaps.

    3. Install the heater pipe grommet.
      GTY813979Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Make sure that the dash panel is securely inserted into the groove of the heater pipe grommet without any gaps.

    4. Temporarily install the 4 bolts (D).
      GTY831301Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Bolt (B) Bolt (C)
      Bolt (D) Nut
    5. Temporarily install the bolt (C).
    6. Using a universal socket wrench 12 mm, temporarily install the bolt (B).
    7. Using a universal socket wrench 12 mm, temporarily install the 2 bolts (A).
      GTY815186Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Bolt (A) - -
    8. Temporarily install the nut.
    9. Tighten the 4 bolts (D).

      Torque: 36 N.m (367 kgf/cm, 27 ft.lbf) 

    10. Using a universal socket wrench 12 mm, tighten the bolt (B) and 2 bolts (A).

      Torque: 20 N.m (204 kgf/cm, 15 ft.lbf) 

    11. Tighten the bolt (C).

      Torque: 15 N.m (153 kgf/cm, 11 ft.lbf) 

    12. Tighten the nut.

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

  8. INSTALL DRAIN COOLER HOSE (for Front Passenger Side) 
    1. Install the drain cooler hose (for front passenger side).
      GTY799684Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Attach the guide.
  9. INSTALL DRAIN COOLER HOSE (for Driver's Side) 
    1. Install the drain cooler hose (for driver's side).
      GTY832637Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Attach the guide.
  10. INSTALL NO. 3 HEATER TO REGISTER DUCT 
    1. Install the No. 3 heater to register duct with the 2 clips.
      GTY836751Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Screw
      Clip
    2. Install the screw.
  11. INSTALL NO. 2 HEATER TO REGISTER DUCT 
    1. Install the No. 2 heater to register duct with the 3 clips.
      GTY799670Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. INSTALL INSTRUMENT PANEL WIRE 
    1. Attach the clamp.
      GTY970039Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Bolt Connector
    2. Connect the 4 connectors.
    3. Install the 2 nuts.

      Torque: 8.0 N.m (82 kgf/cm, 71 in.lbf) 

  13. INSTALL AIR CONDITIONING AMPLIFIER ASSEMBLY 

    Refer to PROCEDURE - Step 1

  14. INSTALL POWER DISTRIBUTION BOX ASSEMBLY WITH MAIN BODY ECU 

    Refer to PROCEDURE - Step 2

  15. INSTALL CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

    Refer to PROCEDURE - Step 1

  16. INSTALL NO. 3 INSTRUMENT PANEL TO COWL BRACE SUB-ASSEMBLY 
    1. Install the No. 3 instrument panel to cowl brace sub-assembly with the bolt and nut.

      Bolt 

      Torque: 10 N.m (102 kgf/cm, 7 ft.lbf) 

      Nut 

      Torque: 6.0 N.m (61 kgf/cm, 53 in.lbf) 

      GTY811527Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Bolt
      Nut
    2. Attach the clamp.
  17. INSTALL INSTRUMENT PANEL WIRE 
    1. Attach the clamp.
      GTY1236789Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the 2 connectors.
  18. INSTALL NO. 1 INSTRUMENT PANEL BRACE SUB-ASSEMBLY 
    1. Install the No. 1 instrument panel brace sub-assembly with the bolt and 2 nuts.
      GTY805521Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Bolt
      Nut
      Screw

      Bolt 

      Torque: 20 N.m (204 kgf/cm, 15 ft.lbf) 

      Nut 

      Torque: 18 N.m (184 kgf/cm, 13 ft.lbf) 

    2. Install the screw.
    3. Attach the clamp.
  19. INSTALL NO. 2 INSTRUMENT PANEL BRACE SUB-ASSEMBLY 
    1. Install the No. 2 instrument panel brace sub-assembly with the bolt and 2 nuts.
      GTY827199Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Bolt
      Nut
      Screw

      Bolt 

      Torque: 20 N.m (204 kgf/cm, 15 ft.lbf) 

      Nut 

      Torque: 6.0 N.m (61 kgf/cm, 53 in.lbf) 

    2. Install the screw.
    3. Attach the clamp.
  20. INSTALL WIRING HARNESS CLAMP BRACKET 
    1. Install the wiring harness clamp bracket with the screw.
      GTY815287Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  21. INSTALL PASSENGER SIDE JUNCTION BLOCK ASSEMBLY 
    1. Attach the claw to connect the 2 lever connectors.
      NOTE:

      Be sure to connect the lever connector securely.

      GTY970659Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Lever Connector - -
      Rotate in this Direction - -
    2. Attach the claw.
    3. Install the 2 nuts.

      Torque: 8.0 N.m (82 kgf/cm, 71 in.lbf) 

      GTY824773Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Nut (A)
      *b Nut (B)
  22. INSTALL SHIFT CONTROL ECU 
    1. for 2WD:

      Refer to PROCEDURE - Step 3

    2. for AWD:

      Refer to PROCEDURE - Step 3

  23. INSTALL SEMICONDUCTOR POWER INTEGRATION ECU (w/ PTC Heater) 

    Refer to PROCEDURE - Step 1

  24. INSTALL SEMICONDUCTOR POWER INTEGRATION ECU (w/o PTC Heater) 

    HINT: 

    Use the same procedure as for the semiconductor power integration ECU (w/ PTC Heater).

  25. INSTALL INSTRUMENT PANEL WIRE 
    1. Attach the clamp.
      GTY775389Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the connector.
    3. Connect the connector.
      GTY827338Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Attach the clamp.
  26. INSTALL NO. 2 AIR DUCT SUB-ASSEMBLY 
    1. Install the No. 2 air duct sub-assembly with the clip.
      GTY819808Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction
  27. INSTALL FRONT FLOOR MAT LH 
    1. Install the front floor mat LH.
      GTY798527Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A for 2WD *B for AWD
  28. INSTALL REAR NO. 2 AIR DUCT 
    1. Install the rear No. 2 air duct.
      GTY828420Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A for 2WD
      *B for AWD
      Install in this Direction
  29. INSTALL REAR AIR DUCT GUIDE LH 
    1. Attach the claw and install the rear air duct guide LH.
      GTY832351Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction
  30. INSTALL FRONT FLOOR MAT RH 
    1. Install the front floor mat RH.
      GTY812271Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A except Rear Power Seat with Ottoman *B for Rear Power Seat with Ottoman
  31. INSTALL REAR NO. 1 AIR DUCT 
    1. Install the rear No. 1 air duct.
      GTY829755Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A except Rear Power Seat with Ottoman
      *B for Rear Power Seat with Ottoman
      Install in this Direction
  32. INSTALL REAR AIR DUCT GUIDE RH 

    HINT: 

    Use the same procedure as for the LH side.

  33. INSTALL FRONT FLOOR FRONT CARPET ASSEMBLY 
    1. Install the front floor front carpet assembly in the order shown in the illustration.
      GTY833884Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction Insert to the end
    2. Install the clip.
    3. Install the front floor front carpet assembly in the order shown in the illustration.
      GTY818291Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction Insert to the End
      Fastener - -
    4. Attach the 2 fasteners.
    5. Install the clip.
    6. Attach the clamp.
      GTY799610Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      Use the same procedure for the opposite side.

  34. INSTALL REAR NO. 3 AIR DUCT 
    1. Install the rear No. 3 air duct in the direction of the arrow shown in the illustration.
      GTY813147Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction

      HINT: 

      Use the same procedure for both rear No. 3 air ducts.

    2. Install the 2 screws.
      GTY805884Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      Use the same procedure for the opposite side.

  35. INSTALL AIR DUCT PLUG 
    1. Attach the claw to install the 2 air duct plugs.
      GTY805818Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      Use the same procedure for the opposite side.

  36. INSTALL FRONT FLOOR CAUTION PLATE COVER 
    1. Attach the claw and guide to install the front floor caution plate cover.
      GTY808769Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  37. INSTALL ACCELERATOR PEDAL 

    Refer to PROCEDURE - Step 2

  38. INSTALL ACCELERATOR PEDAL PAD 

    Refer to PROCEDURE - Step 3

  39. INSTALL LOWER CENTER PILLAR GARNISH LH 

    Refer to PROCEDURE - Step 36

  40. INSTALL REAR DOOR SCUFF PLATE LH 

    Refer to PROCEDURE - Step 40

  41. INSTALL LOWER CENTER PILLAR GARNISH RH 

    HINT: 

    Use the same procedure described for the LH side.

  42. INSTALL REAR DOOR SCUFF PLATE RH 

    HINT: 

    Use the same procedure described for the LH side.

  43. CONNECT AIR CONDITIONING TUBE AND ACCESSORY ASSEMBLY 
    1. Remove the vinyl tape wrapped around the connection of the air conditioning tube and accessory assembly and the air conditioning tube and accessory assembly.
    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 12 or equivalent

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

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

    4. Press in the air conditioning tube and accessory assembly until the shaft center of the pipe joint securely engages the seal hole.
      NOTE:
      • Do not apply excessive force to the air conditioning tube and accessory assembly.
      • Make sure not to cut the O-ring while installing it. (Cut O-rings cannot be installed)
    5. Rotate the 1-point tightening plate and align the 1-point tightening plate of air conditioning tube and accessory assembly with the tube marking (black).
      NOTE:

      Make sure that the air conditioning tube and accessory assembly 1-point tightening plate is partially on the marking

      GTY809484Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a View A *b Air Conditioning Tube and Accessory Assembly 1-Point Tightening Plate Marking
      *c Counterclockwise (OK) *d Standard
      *e Clockwise (OK) - -
      Rotate in this Direction Air Conditioning Tube and Accessory Assembly Marking
    6. Install the bolt.

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

      GTY813978Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  44. INSTALL FENDER APRON BRACE SUB-ASSEMBLY LH 
    1. Install the fender apron brace sub-assembly LH to the body with the 2 bolts.
      GTY775691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Torque: 49 N.m (500 kgf/cm, 36 ft.lbf) 

  45. INSTALL INLET HEATER WATER HOSE 
    1. Install the inlet heater water hose as shown in the illustration.
      NOTE:
      • Do not apply excessive force to the inlet heater water hose.
      • Make sure the inlet heater water hose is securely inserted to the stopper. However, If the end of the inlet heater water hose is cut diagonally, it is acceptable for the entire circumference of the tip to not contact the stopper.
      • The installation tolerance of the inlet heater water hose rotation direction is within 1 paint mark width of the nominal position.
      GTY827173Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A for 2WD *B for AWD
      *a View A *b Marking (Red)
      *c Hose Clip Installation Angle (120°) *d View B
      *e Marking (Orange) *f Inlet Heater Water Hose and Hose Clip Axial Direction Aligning Position
      *g Contact Position *h Inlet Heater Water Hose and Hose End
      *i Hose Clip Installation Range (2 to 7 mm (0.0787 to 0.276 in.)) - -
    2. Make sure to install the hose clip within the range shown in the illustration.
  46. INSTALL OUTLET HEATER WATER HOSE 
    1. Install the outlet heater water hose as shown in the illustration.
      NOTE:
      • Do not apply excessive force to the outlet heater water hose.
      • Make sure the outlet heater water hose is securely inserted to the stopper. However, If the end of the outlet heater water hose is cut diagonally, it is acceptable for the entire circumference of the tip to not contact the stopper.
      • The installation tolerance of the outlet heater water hose rotation direction is within 1 paint mark width of the nominal position.
      GTY799602Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A for 2WD *B for AWD
      *a View A *b Marking (Red)
      *c Hose Clip Installation Angle (45°) *d Hose Clip Installation Angle (120°)
      *e View B *f Marking (Orange)
      *g Outlet Heater Water Hose and Hose Clip Axial Direction Aligning Position *h Contact Position
      *i Outlet Heater Water Hose and Hose End *j Hose Clip Installation Range (2 to 7 mm (0.0787 to 0.276 in.))
    2. Install the outlet heater water hose as shown in the illustration.
    3. Attach the clamp.
      NOTE:

      Make sure the marking is hidden in the clamp.

      GTY805660Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A for 2WD *B for AWD
      *1 Clamp *2 Outlet Heater Water Hose
      *a Marking - -
  47. CONNECT INLET HEATER WATER HOSE 

    Refer to PROCEDURE - Step 121

  48. CONNECT OUTLET HEATER WATER HOSE 

    Refer to PROCEDURE - Step 120

  49. CONNECT NO. 14 CONNECTOR HOLDER 
    1. Attach the guide, claw and connect the No. 14 connector holder to the No. 17 connector holder.
      GTY791187Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Connect in this Direction - -
    2. Attach the claw to connect the lever connector.
      GTY780488Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Rotate in this Direction
      Connector
      Lever Connector
      NOTE:

      Be sure to connect the lever connector securely.

    3. Connect the 2 connectors.
    4. Attach the claw to install the No. 1 semiconductor power integration ECU.
      NOTE:
      • Make sure the connector terminal is free from oil and grease.
      • Do not subject the No. 1 semiconductor power integration ECU to any impact.
      • Do not use a No. 1 semiconductor power integration ECU that has been dropped.
      • Do not disassemble the No. 1 semiconductor power integration ECU.
      GTY837325Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Connect the 2 connectors.
      GTY775744Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Refer to PROCEDURE - Step 3

    6. Attach the clamp.
  50. INSTALL NO. 1 RELAY BLOCK COVER 

    Refer to PROCEDURE - Step 2

  51. INSTALL FENDER APRON BRACE SUB-ASSEMBLY RH 
    1. Install the fender apron brace sub-assembly RH with the 2 bolts.

      Torque: 49 N.m (500 kgf/cm, 36 ft.lbf) 

      GTY775383Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Attach the clamp.
      GTY775386Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  52. INSTALL HOLE PLUG 
    1. Install the 2 hole plugs.
      GTY813974Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  53. INSTALL COWL VENTILATOR SPLASH SHIELD RH 
    1. Attach the claw.
      GTY835794Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Attach the guide and clip to install the cowl ventilator splash shield RH.
  54. INSTALL FRONT WIPER MOTOR AND LINK 

    Refer to INSTALLATION [10/2020 - ]

  55. INSTALL HEADUP DISPLAY (w/ Headup Display) 

    Refer to PROCEDURE - Step 1

  56. INSTALL STEERING COLUMN ASSEMBLY 

    Refer to INSTALLATION [10/2023 - ]

  57. INSTALL INSTRUMENT PANEL SAFETY PAD SUB-ASSEMBLY 

    Refer to INSTALLATION [10/2023 - ]

  58. INSTALL FRONT SEAT ASSEMBLY LH 

    Refer to INSTALLATION [10/2020 - ]

  59. INSTALL FRONT SEAT ASSEMBLY RH 

    HINT: 

    Use the same procedure as for the LH side.

  60. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL 

    Refer to PROCEDURE - Step 2

  61. INITIALIZATION AFTER RECONNECTING BATTERY TERMINAL 

    Refer to WORK PROCEDURE [10/2023 - ]

    HINT: 

    When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.

    Refer to AUTOMATIC LEARNING CHART [10/2023 - ]

  62. INSTALL LUGGAGE COMPARTMENT MAT SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 11

  63. CHARGE AIR CONDITIONING SYSTEM WITH REFRIGERANT 

    Refer to PROCEDURE - Step 5

  64. ADD ENGINE COOLANT 

    Refer to PROCEDURE - Step 9

  65. INSPECT FOR COOLANT LEAK 

    Refer to PROCEDURE - Step 3

  66. WARM UP ENGINE 

    Refer to PROCEDURE - Step 6

  67. INSPECT FOR REFRIGERANT LEAK 

    Refer to PROCEDURE - Step 7

  68. INSTALL OIL PAN PROTECTOR (for 2WD) 

    Refer to PROCEDURE - Step 17

  69. INSTALL ENGINE UNDER COVER BRACKET RH (for AWD) 

    Refer to PROCEDURE - Step 6

  70. CONNECT NO. 1 ENGINE UNDER COVER ASSEMBLY 

    Refer to PROCEDURE - Step 17

  71. INSTALL LOWER RADIATOR AIR DEFLECTOR 

    Refer to PROCEDURE - Step 8

  72. INSTALL UPPER RADIATOR SUPPORT SEAL 

    Refer to PROCEDURE - Step 9

  73. INSTALL RADIATOR COVER PLATE 

    Refer to PROCEDURE - Step 10

  74. INSTALL V-BANK COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 192

  75. CHECK AND CLEAR DTC 
    1. for 2WD:

      Refer to DTC CHECK / CLEAR [12/2017 - ]

    2. for AWD:

      Refer to DTC CHECK / CLEAR [12/2017 - ]