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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) >> REFRIGERANT LINE (for HV Model) >> Installation [10/2022 - ] >> Procedure

Installation [10/2022 - ]: Procedure

  1. INSTALL PIPING CLAMP (for Suction Hose Sub-assembly Side) 
    1. for Low Pressure:
      1. Remove the vinyl tape from the No. 2 air conditioner tube and accessory assembly and suction hose sub-assembly.
      2. Install a new piping clamp to the suction hose sub-assembly.
        GTY873638Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *1 Suction Hose Sub-assembly
        *2 Piping Clamp
        *a Groove
        NOTE:
        • Securely engage the piping clamp to the groove of the suction hose sub-assembly.
        • Do not open the piping clamp more than the diameter of the suction hose sub-assembly when installing it.
        • Do not install the piping clamp with the large diameter section facing the wrong direction.
      3. Sufficiently apply compressor oil to 2 new O-rings and the fitting surfaces of the suction hose sub-assembly.

        Compressor Oil

        ND-OIL 11 or equivalent

      4. Install the 2 O-rings to the suction hose sub-assembly.
        NOTE:

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

      5. Align the alignment marks and connect the suction hose sub-assembly to the No. 2 air conditioner tube and accessory assembly.
        GTY677264Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Large Diameter Section of Piping Clamp
        *b Alignment Mark
        NOTE:

        Connect the parts by holding the tubes, not the piping clamp.

      6. Securely insert the piping clamp to the point where the large diameter section of the piping clamp is covered by the No. 2 air conditioner tube and accessory assembly.
        GTY641086Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Large Diameter Section of Piping Clamp
        NOTE:
        • When inserting, make sure that a click sound is heard.
        • Check that the suction hose sub-assembly is securely connected by pulling it.
      7. Remove the vinyl tape from the No. 2 air conditioner tube and accessory assembly and No. 1 air conditioning accessory assembly.
      8. Sufficiently apply compressor oil to 2 new O-rings and the fitting surfaces of the No. 2 air conditioner tube and accessory assembly.

        Compressor Oil

        ND-OIL 11 or equivalent

      9. Install the 2 O-rings to the No. 2 air conditioner tube and accessory assembly.
        NOTE:

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

      10. Connect the No. 2 air conditioner tube and accessory assembly to the No. 1 air conditioning accessory assembly.
      11. Install the piping clamp to the No. 1 air conditioning accessory assembly.
        NOTE:

        Make sure that the piping clamp is engaged securely with no gap.

        GTY448201Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Correct
        *b Incorrect
        *c No Gap
        *d Gap
    2. for High Pressure:
      1. Remove the vinyl tape from the No. 2 air conditioner tube and accessory assembly and air conditioning tube assembly.
      2. Sufficiently apply compressor oil to 2 new O-rings and the fitting surfaces of the No. 2 air conditioner tube and accessory assembly.

        Compressor Oil

        ND-OIL 11 or equivalent

      3. Install the 2 O-rings to the No. 2 air conditioner tube and accessory assembly.
        NOTE:

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

      4. Connect the No. 2 air conditioner tube and accessory assembly to the air conditioning tube assembly.
      5. Install the piping clamp to the air conditioning tube assembly.
        NOTE:

        Make sure that the piping clamp is engaged securely with no gap.

        GTY448201Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Correct
        *b Incorrect
        *c No Gap
        *d Gap
      6. Remove the vinyl tape from the No. 2 air conditioner tube and accessory assembly and No. 1 air conditioning accessory assembly.
      7. Sufficiently apply compressor oil to 2 new O-rings and the fitting surfaces of the No. 2 air conditioner tube and accessory assembly.

        Compressor Oil

        ND-OIL 11 or equivalent

      8. Install the 2 O-rings to the No. 2 air conditioner tube and accessory assembly.
        NOTE:

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

      9. Connect the No. 2 air conditioner tube and accessory assembly to the No. 1 air conditioning accessory assembly.
      10. Install the piping clamp to the No. 1 air conditioning accessory assembly.
        NOTE:

        Make sure that the piping clamp is engaged securely with no gap.

        GTY448201Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Correct
        *b Incorrect
        *c No Gap
        *d Gap
  2. INSTALL PIPING CLAMP (for Cooler Refrigerant Liquid Pipe A Side) 

    Refer to PROCEDURE - Step 4

  3. CHARGE AIR CONDITIONING SYSTEM WITH REFRIGERANT 

    See step  2

  4. WARM UP COMPRESSOR 

    See step  4

  5. INSPECT FOR REFRIGERANT LEAK 

    See step  5

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