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)

    A01VK98

    1. Turn the ignition switch to ON.

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

      Measurement Condition
      Item Condition
      A/C Switch ON
      A/C driving 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 does not meet condition, do not perform this check.

      Tech Tips

      If the amount of refrigerant in the system is insufficient, air conditioning system operation stops after 11 minutes in order to prevent compressor burnout, and the A/C switch indicator light turns off.

    3. Connect the intelligent tester 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 gas leakage using halogen leak detector, and repair if necessary Click here

      DTC B14B8 is not output Correct or insufficient Perform the refrigerant shortage check using the intelligent tester

  2. REFRIGERANT SHORTAGE CHECK USING THE INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

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

    5. According to the display on the intelligent tester, 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 Recirculation (Ambient temperature is 30°C (86°F) or less)
      Fresh (Ambient temperature is 31°C (87°F) or more)
      Blower Speed HI
      Temperature Setting MAX HOT

      *: If the ambient temperature does not meet condition, do not perform this check.

      Tech Tips


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

      • The message "The gas volume is insufficient" is shown on the intelligent tester screen and air conditioning system is stopped if the amount of refrigerant is insufficient in the cycle.

      • The refrigerant shortage check using the intelligent tester does not output a DTC.

      Result
      Result Amount of Refrigerant Corrective Action
      The gas volume is insufficient Insufficient or leakage

      1. Check for gas leakage using halogen leak detector, and repair if necessary

      2. Evacuate air and then charge appropriate volume of new refrigerant
      The gas volume is normal Correct -