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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heating / Air Conditioning System - Service Information (1 Of 3) >> FRONT AIR CONDITIONING UNIT (for Gasoline Model) >> Removal [11/2023 - ] >> Procedure

Removal [11/2023 - ]: Procedure

  1. PRECAUTION 
    NOTE:

    Make sure to select face mode before disconnecting the cable from the negative (-) battery terminal.

  2. RECOVER REFRIGERANT FROM REFRIGERATION SYSTEM 

    See step  1

  3. REMOVE WINDSHIELD WIPER MOTOR AND LINK ASSEMBLY 

    Refer to REMOVAL [12/2019 - ]

  4. REMOVE FENDER SPLASH SHIELD SUB-ASSEMBLY REAR LH 

    Refer to PROCEDURE - Step 3

  5. REMOVE FENDER SPLASH SHIELD SUB-ASSEMBLY REAR RH 

    HINT: 

    Perform the same procedure as for the LH side.

  6. REMOVE FRONT FENDER SPLASH SHIELD SEAL FRONT LH 

    Refer to PROCEDURE - Step 5

  7. REMOVE FRONT FENDER SPLASH SHEILD SEAL FRONT RH 

    HINT: 

    Perform the same procedure as for the LH side.

  8. REMOVE FRONT UPPER SUSPENSION TO COWL BRACE SUB-ASSEMBLY LH 

    Refer to PROCEDURE - Step 7

  9. REMOVE FRONT UPPER SUSPENSION TO COWL BRACE SUB-ASSEMBLY RH 

    HINT: 

    Perform the same procedure as for the LH side.

  10. REMOVE COWL VENTILATOR PANEL SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 9

  11. DISCONNECT NO. 2 AIR CONDITIONER TUBE AND ACCESSORY ASSEMBLY 
    1. Remove the bolt and rotate the hook connector.
      GTY1120270Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the No. 2 air conditioner tube and accessory assembly.
      GTY1120258Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Remove the 2 O-rings from the No. 2 air conditioner tube and accessory assembly.
      NOTE:

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

  12. DISCONNECT OUTLET HEATER WATER HOSE B (w/o Stop And Start System) 
    1. Using pliers, grip the claws of the clip and slide the clip to disconnect the outlet heater water hose B.
      NOTE:
      • Do not apply excessive force to the outlet heater water hose B.
      • Prepare a drain pan or cloth in case the coolant leaks.
      GTY1121985Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  13. DISCONNECT OUTLET HEATER WATER HOSE A (w/ Stop And Start System) 
    1. Using pliers, grip the claws of the clip and slide the clip to disconnect the outlet heater water hose A.
      NOTE:
      • Do not apply excessive force to the outlet heater water hose A.
      • Prepare a drain pan or cloth in case the coolant leaks.
      GTY1120253Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  14. DISCONNECT INLET HEATER WATER HOSE B 
    1. Using pliers, grip the claws of the clip and slide the clip to disconnect the inlet heater water hose B.
      GTY1120255Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:
      • Do not apply excessive force to the inlet heater water hose B.
      • Prepare a drain pan or cloth in case the coolant leaks.
  15. REMOVE FRONT SEAT ASSEMBLY RH (for Manual Seat) 

    Refer to REMOVAL [11/2023 - ]

  16. REMOVE FRONT SEAT ASSEMBLY (for Power Seat) 

    Refer to REMOVAL [11/2023 - ]

  17. REMOVE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY WITH MAIN BODY ECU 

    Refer to REMOVAL [11/2023 - ]

  18. REMOVE METER MIRROR SUB-ASSEMBLY (w/ Headup Display) 

    Refer to REMOVAL [11/2023 - ]

  19. REMOVE NO. 4 AIR DUCT SUB-ASSEMBLY 
    1. Remove the 2 bolts.
      GTY872258Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a View A
      Front
    2. Disengage the 3 claws to remove the No. 4 air duct sub-assembly.
      NOTE:

      Be careful not to deform or damage the lower heater case of the air conditioner unit assembly when removing the No. 4 air duct sub-assembly.

  20. REMOVE STEERING COLUMN ASSEMBLY 

    Refer to REMOVAL [11/2023 - ]

  21. REMOVE ECU INTEGRATION BOX RH 

    Refer to PROCEDURE - Step 7

  22. REMOVE PARKING ASSIST ECU WITH BRACKET 

    Refer to PROCEDURE - Step 2

  23. REMOVE NO. 1 CLEARANCE WARNING BUZZER 

    Refer to PROCEDURE - Step 24

  24. REMOVE COOLER (ROOM TEMP. SENSOR) THERMISTOR (for Automatic Air Conditioning System) 

    See step  23

  25. REMOVE ACCELERATOR PEDAL PAD 

    Refer to PROCEDURE - Step 5

  26. REMOVE ACCELERATOR PEDAL 

    Refer to PROCEDURE - Step 6

  27. REMOVE REAR NO. 2 AIR DUCT 

    See step  26

  28. REMOVE REAR NO. 1 AIR DUCT 

    See step  27

  29. REMOVE REAR NO. 4 AIR DUCT 

    See step  28

  30. REMOVE REAR NO. 3 AIR DUCT 

    See step  29

  31. REMOVE NO. 3 DASH PANEL INSULATOR PAD 

    See step  30

  32. REMOVE CENTER HEATER TO REGISTER SUB DUCT 

    See step  31

  33. DISCONNECT INSTRUMENT PANEL WIRE 
    1. Disconnect the connector.
      GTY1180360Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Earth Wire *b Connector Holder
      Bolt (A) Bolt (B)
      Connector Nut
    2. Remove the 4 bolts (A) and disconnect the 4 earth wires.
    3. Remove the 2 nuts.
    4. Remove the bolt (B) and disconnect the connector holder.
    5. Disengage each clamp.
    6. Disconnect the 2 connectors.
      GTY878925Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Earth Wire
      Connector
      Bolt
    7. Disengage each clamp.
    8. Remove the bolt and disconnect the earth wire.
  34. REMOVE NO. 1 INSTRUMENT PANEL BRACE SUB-ASSEMBLY 

    See step  33

  35. REMOVE NO. 2 INSTRUMENT PANEL BRACE SUB-ASSEMBLY 

    See step  34

  36. REMOVE INSTRUMENT PANEL REINFORCEMENT ASSEMBLY WITH AIR CONDITIONER UNIT ASSEMBLY 

    See step  35

  37. REMOVE CENTER HEATER TO REGISTER DUCT 

    See step  36

  38. REMOVE AIR CONDITIONER UNIT ASSEMBLY 

    See step  37

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