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 diagnostic check mode.

      B001NB9E02

  4. INDICATOR CHECK


    1. Turn the power switch off.

    2. Turn the power switch on (ACC) and wait at least 5 seconds. (w/ Multi-display)

    3. Turn the power switch on (IG) while pressing the air conditioning control assembly AUTO and recirculation/fresh switch simultaneously. Hold both switches until the indicator check screen appears.

      B001LJTE01
      Text in Illustration
      *A for LHD *B for RHD

    4. 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.

      B001KN9C01
      Text in Illustration
      *A for LHD *B for RHD
      *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 the check mode.

  5. SENSOR CHECK (DTC CHECK)


    1. Perform the indicator check.

      Tech Tips

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

    2. Read the DTCs displayed on the display.

      B001KBHC01
      Text in Illustration
      *A for LHD *B for RHD
      *a Diagnostic Trouble Code (DTC) - -

      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.

      Tech Tips

      Refer to 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 12 is output.

    3. If the steps are difficult to read because they change automatically, press the front defroster switch to display the steps one at a time so that they can be read easily. The items are displayed step by step each time the front defroster switch is pressed.

      B001MWDE01
      Text in Illustration
      *A for LHD *B for RHD

      Tech Tips

      Press the OFF switch to finish panel diagnosis.

    4. Clear DTCs


      1. During the sensor check, press the front defroster switch and rear defogger switch simultaneously.

        B001L8VE01
        Text in Illustration
        *A for LHD *B for RHD