AIR CONDITIONING SYSTEM CHECK MODE PROCEDURE


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

    A01HHASC01
    *a Example (for LHD)

    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 higher

      *: 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 GTS to the DLC3.

    4. Check for DTC B14B8.


      Body Electrical > Air Conditioner > Trouble Codes
      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.

      for HFC-134a (R134a):

      Click here

      for HFO-1234yf (R1234yf):

      Click here

      DTC B14B8 is not output Correct or insufficient Perform a refrigerant gas volume check using the GTS.

  2. REFRIGERANT GAS VOLUME CHECK USING THE GTS


    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Turn the GTS on.

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

    5. According to the display on the GTS, perform the refrigerant gas volume 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 higher)
      Recirculation (Ambient temperature is 30°C (86°F) or less)
      Blower Speed HI

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


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

      Tech Tips


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

      • A message indicating a refrigerant gas volume is displayed on the GTS 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 gas volume check using the GTS.

      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.

        for HFC-134a (R134a):

        Click here

        for HFO-1234yf (R1234yf):

        Click here

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