AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System) Front Window Fogging

DESCRIPTION

If the windshield frequently fogs up even though the air conditioning system is operating, the following factors may be the cause.

Symptom Factor
Windshield frequently fogs up

  • Compressor assembly with pulley (compressor solenoid) malfunction*1

  • Cooler compressor assembly (compressor solenoid) malfunction*2

  • Refrigerant volume (low)

  • Cooler expansion valve (opened excessively)

  • No. 1 air conditioning radiator damper servo sub-assembly malfunction

  • Mechanical locking of damper and damper link

PROCEDURE


  1. PERFORM REFRIGERANT SHORTAGE CHECK


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Air Conditioner / Utility / Refrigerant Gas Volume Check.


      Body Electrical > Air Conditioner > Utility
      Tester Display
      Refrigerant Gas Volume Check

    5. Check that the following conditions are met and perform the refrigerant shortage check according to the display on the GTS.

      Measurement Condition:
      Item Condition
      A/C switch On
      Ambient temperature* 0 to 49°C (32 to 120°F)
      Blower speed HI

      *: If the ambient temperature is not within the range shown, do not perform this check.

      Result
      Result Amount of Refrigerant
      Refrigerant correct Correct
      Refrigerant shortage Insufficient
      OK
      "Refrigerant correct" is displayed on the GTS.
      Result
      Proceed to
      OK
      NG

    NG

    CHARGE SYSTEM WITH REFRIGERANT Click here

    OK

  2. CHECK OPERATION


    1. Press the front defroster switch on the air conditioning control panel (radio and display receiver assembly)*1 or air conditioning control assembly*2 and check that the air outlet mode changes to DEF mode.


      • *1: w/ Radio and Display Receiver

      • *2: w/o Radio and Display Receiver

      OK
      The air outlet mode changes to DEF mode.
      Result
      Proceed to
      OK
      NG

    OK

    INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET Click here

    NG

    GO TO DTC B1443 Click here