AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System) DIAGNOSIS SYSTEM


  1. DESCRIPTION


    1. Air conditioning system data and the Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the GTS to check for malfunctions and perform troubleshooting.

  2. CHECK DLC3


    1. Check the DLC3 Click here.

  3. LIST OF OPERATION METHODS


    1. By operating each of the air conditioning control switches as shown in the diagram below, it is possible to enter diagnostic check mode.

      A004IIME02
  4. INDICATOR CHECK


    1. Turn the ignition switch off.

    2. A004HHW

      Turn the ignition switch to ON while pressing the air conditioning control assembly "AUTO" switch and "Recirculation/Fresh" switch simultaneously. Hold both switches until the indicator check screen appears.

    3. The indicator check is automatically performed when panel diagnosis is activated. Check that the indicators light up and go off 4 times at 1 second intervals continuously.

      A004J06E02
      Text in Illustration
      *a Indicator Blinking Pattern
      *b ON
      *c OFF
      *d 1 sec.

      Tech Tips


      • The sensor check automatically starts when the indicator check is completed.

      • Press the "OFF" switch to cancel check mode.

  5. SENSOR CHECK (DTC CHECK)


    1. Start the engine and warm it up.

    2. Perform the indicator check.

      Tech Tips

      After the indicator check is completed, the system enters DTC check mode automatically.

    3. A004JZGE02
      Text in Illustration
      *a Diagnostic Trouble Code (DTC)

      Read the DTC displayed on the accessory meter display.

      Note


      • In sensor check mode, which is automatically entered after indicator check mode, troubleshooting may be partially performed. Be sure to perform the sensor check again.

      • If the check is performed in a dark place, DTC 25 may be displayed even though the system is normal.

      Tech Tips

      Refer to DTC Chart for details of the codes Click here.


      • When there are no problems, DTC 20 is output.

      • As an example, the illustration shows that DTC 21 is output.

    4. If the DTCs are difficult to read because they change automatically , press the "A/C" switch to display the DTCs one at a time so that they can be read easily. The DTCs change step by step each time the "A/C" switch is pressed.

      Tech Tips

      Press the "OFF" switch to finish panel diagnosis.