AIR CONDITIONING SYSTEM (for Manual Air Conditioning System) CHECK MODE PROCEDURE


  1. REFRIGERANT SHORTAGE CHECK IN NORMAL OPERATION (CHECK A/C SWITCH INDICATOR AND DTC)

    A01HMC2

    1. Start the engine.

    2. Check that A/C switch indicator remains on when the following conditions are met.

      Measurement Condition
      Item Condition
      A/C Switch On
      A/C operation time 15 minutes or more
      Ambient temperature* 0 to 49°C (32 to 120°F)
      Engine coolant temperature 45°C (113°F) or more

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

      Tech Tips

      The A/C switch indicator and air conditioning system turn off if the amount of refrigerant in the system is insufficient.

    3. Connect the Techstream to the DLC3.

    4. Check for DTC B14B8.

      Result
      Result Amount of Refrigerant Corrective Action
      DTC B14B8 is output Empty or nearly empty

      Check for refrigerant leaks using a halogen leak detector, and repair if necessary Click here.
      DTC B14B8 is not output Correct or insufficient Perform a refrigerant shortage check using the Techstream.

  2. REFRIGERANT SHORTAGE CHECK USING THE TECHSTREAM


    1. Connect the Techstream to the DLC3.

    2. Start the engine.

    3. Turn the Techstream on.

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

    5. According to the display on the Techstream, perform the refrigerant shortage check when the following conditions are met.

      Measurement Condition
      Item Condition
      A/C Switch On
      Ambient temperature* 0 to 49°C (32 to 120°F)
      R/F Switch Fresh (Ambient temperature is 31°C (87°F) or more)
      Recirculation (Ambient temperature is 30°C (86°F) or less)
      Blower Speed HI
      Temperature Setting MAX HOT

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

      Tech Tips


      • Refer to the Techstream operator's manual for further details.

      • A message indicating a refrigerant shortage is displayed on the Techstream and the air conditioning system turns off if the amount of refrigerant in the system is insufficient.

      • DTCs are not stored when performing the refrigerant shortage check using the Techstream.

      Result
      Result Amount of Refrigerant Corrective Action
      Refrigerant shortage Insufficient or leakage

      1. Check for refrigerant leaks using a halogen leak detector, and repair if necessary Click here.

      2. Evacuate the air conditioning system and charge it with the appropriate volume of new or purified refrigerant.
      Refrigerant correct Correct -