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


  1. DESCRIPTION


    1. Air conditioning system data and 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 intelligent tester 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 the diagnostic check mode.

      A01IQ39E02

  4. INDICATOR CHECK

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    1. Turn the ignition switch off.

    2. Turn the ignition switch to ACC and wait at least 5 seconds.

    3. Press and hold the air conditioning control "AUTO" switch and "recirculation/fresh" switch simultaneously, and turn the ignition switch to ON. Continue holding the 2 switches until the panel diagnosis mode begins.

      Tech Tips

      If a navigation system is installed, the indicator will blink and the buzzer will sound.

    4. A01IU6IE05

      Check that all indicators turn on and off 4 times in succession at 1 second intervals.

      Tech Tips


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

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

  5. DTC CHECK (SENSOR CHECK)

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    1. Start the engine and warm it up.

    2. Perform the indicator check.

      Tech Tips

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

    3. Read the code displayed on the panel.

      Note

      In the sensor check mode, which is automatically entered after the indicator check mode, troubleshooting may be only partially completed.

      Tech Tips

      Refer to the Diagnostic Trouble Code Chart for details of the codes Click here.


      • When there are no problems, DTC 00 is output.

      • As an example, the illustration shows that DTC 23 is output.

    4. If the codes are difficult to read because they change automatically, push the "DEF" switch to display the codes one at a time so that they can be read easily. The items are displayed one by one each time the "DEF" switch is pushed.

      Tech Tips

      Push the "OFF" switch to finish panel diagnosis.