Lexus IS250 · Service Manual HEATER & AIR CONDITIONING SYSTEM

INSTALLATION

Removal / installation


1. INSTALL COOLER DRYER

  1. E050386
    Using pliers, install the cooler dryer to the modulator.

  1. I032475
    Sufficiently apply compressor oil to an O-ring and cap fitting surface.

    Compressor oil:
    ND-OIL 8 or equivalent

  1. E101931
    Using a straight hexagon wrench 14 mm, install the cap to the cooler condenser core.

    Torque:
    2.9 N*m{ 30 kgf*cm , 26 in.*lbf }


2. INSTALL COOLER CONDENSER ASSEMBLY

  1. E117239E01
    Install the cooler condenser assembly with the 4 bolts.

    Torque:
    5.0 N*m{ 51 kgf*cm , 44 in.*lbf }

    HINT:
    If the condenser is replaced with a new one, add compressor oil to the new condenser.

    Capacity:
    40 cc (1.4 fl. oz.)

    Compressor oil:
    ND-8 or equivalent


3. INSTALL DISCHARGE HOSE SUB-ASSEMBLY
  1. Remove the attached vinyl tape from the hose and the connecting part of the cooler condenser assembly.

  1. Sufficiently apply compressor oil to a new O-ring and the fitting surface of the hose joint.

    Compressor oil:
    ND-OIL 8 or equivalent

  1. Install the O-ring on the discharge hose sub-assembly.

  1. E117238
    Install the discharge hose sub-assembly on the cooler condenser assembly with the bolt.

    Torque:
    5.4 N*m{ 55 kgf*cm , 48 in.*lbf }


4. INSTALL LIQUID TUBE SUB-ASSEMBLY
  1. Remove the attached vinyl tape from the pipe and the connecting part of the cooler condenser assembly.

  1. Sufficiently apply compressor oil to a new O-ring and the fitting surface of the pipe joint.

    Compressor oil:
    ND-OIL 8 or equivalent

  1. Install the O-ring on the liquid tube sub-assembly.

  1. E117240
    Install the liquid tube sub-assembly on the cooler condenser assembly with the 2 bolts.

    Torque:
    5.4 N*m{ 55 kgf*cm , 48 in.*lbf }


5. INSTALL RADIATOR SUPPORT UPPER

  1. A121390
    Install the 5 bolts and the upper radiator support.

    Torque:
    8.0 N*m{ 82 kgf*cm , 71 in.*lbf }

  1. A125135E01
    Install the 6 wire harness clamps and the No.2 engine room wire.

  1. A121389
    Connect the clamp and the No.2 cooling fan motor connector.

  1. A121388
    Connect the clamp and the cooling fan motor connector.

  1. A121386E01
    Connect the 4 wire harness clamps and the 3 connectors.


6. INSTALL HOOD LOCK ASSEMBLY

  1. A120537E02
    Install the 2 bolts and the hood lock assembly to the upper radiator support.

    Torque:
    8.0 N*m{ 82 kgf*cm , 71 in.*lbf }

  1. Install the hood lock nut and the hood lock nut cap.

    Torque:
    8.0 N*m{ 82 kgf*cm , 71 in.*lbf }

  1. A120536
    Connect the connector.


7. INSTALL HOOD LOCK CONTROL CABLE COVER

  1. RHD

    1. A121391
      Connect the clamp, and install the 3 screws and the hood lock control cable cover.

  1. LHD

    1. A125111
      Connect the clamp, and install the 3 screws and the hood lock control cable cover.


8. INSTALL MILLIMETER WAVE RADAR SENSOR ASSEMBLY (w/ Dynamic Radar Cruise Control System)

E123140
  1. Install the millimeter wave radar sensor with the 3 bolts.

    Torque:
    5.5 N*m{ 56 kgf*cm , 49 in.*lbf }

  1. Connect the connector.


9. INSTALL RADIATOR SUPPORT OPENING COVER

  1. A126697E01
    Connect the 2 clips, and install the radiator support opening cover.


10. INSTALL FRONT BUMPER ENERGY ABSORBER

11. INSTALL FRONT BUMPER ASSEMBLY

12. INSTALL UNDER ENGINE COVER

13. INSTALL NO. 1 INLET AIR CLEANER

  1. A118345
    Install the inlet air cleaner with the bolt.

    Torque:
    5.0 N*m{ 51 kgf*cm , 44 in.*lbf }


14. CHARGE REFRIGERANT
  1. Perform vacuum purging using a vacuum pump.

  1. Charge refrigerant HFC-134a (R134a).

    Standard:
    430 +- 30 g (15.17 +- 1.06 oz.)

    SST
    07110-58060   (07117-58060, 07117-58070, 07117-58080, 07117-58090, 07117-78050, 07117-88060, 07117-88070, 07117-88080)

    I037365E06

    NOTICE:
    1. Do not operate the cooler compressor before charging refrigerant as the cooler compressor will not work properly without any refrigerant, and will overheat.
    1. Approximately 100 g (3.53 oz.) of refrigerant may need to be charged after bubbles disappear. The refrigerant amount should be checked by measuring its quantity, and not with the sight glass.


15. WARM UP ENGINE
  1. Warm up the engine at less than 1,850 rpm for 2 minutes or more after charging the refrigerant.

    NOTICE:
    Be sure to warm up the compressor when turning the A/C switch ON after removing and installing the cooler refrigerant lines (including the compressor), to prevent damage to the compressor.


16. CHECK FOR LEAKAGE OF REFRIGERANT
  1. After recharging the refrigerant gas, check for refrigerant gas leakage using a halogen leak detector.

  1. Perform the operation under the following conditions:

    1. Stop the engine.
    1. Secure good ventilation (the gas leak detector may react to volatile gases other than refrigerant, such as evaporated gasoline or exhaust gas).
    1. Repeat the test 2 or 3 times.
    1. Make sure that some refrigerant remains in the refrigeration system. When compressor is off: approximately 392 to 588 kPa (4 to 6 kgf*cm2 57 to 85 psi)

  1. I042222E10
    Using a gas leak detector, check the refrigerant line for leakage.

  1. If a gas leak is not detected on the drain hose, remove the blower motor control (blower resistor) from the cooling unit. Insert the gas leak detector sensor into the unit and perform the test.

  1. Disconnect the connector and leave the pressure switch on for approximately 20 minutes. Bring the gas leak detector close to the pressure switch and perform the test.


17. INSTALL V-BANK COVER SUB-ASSEMBLY

  1. A127528
    Engage the 2 clips on the front of the cover, and then engage the clip on the rear to install the V-bank cover.

    NOTICE:
    1. Be sure to engage the clips securely.
    2. Do not apply excessive force or do not hit the cover to engage the clips. This may cause the cover to break.


18. INSTALL SIDE ENGINE ROOM COVER LH

  1. A123702E01
    Install the side cover with the 5 clips.


19. INSTALL SIDE ENGINE ROOM COVER RH

  1. A123703E01
    Install the side cover with the 2 clips.


20. INSTALL COOL AIR INTAKE DUCT SEAL

  1. A127530
    Install the intake duct seal with the 11 clips.

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