AIR CONDITIONING SYSTEM DIAGNOSIS SYSTEM


  1. DESCRIPTION

    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 GTS to check for malfunctions and perform troubleshooting.

  2. CHECK DLC3

    Check the DLC3.

    Click here

  3. LIST OF OPERATION METHODS

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

    A01QCZ1E80

  4. INDICATOR CHECK

    Tech Tips

    The same system is used for LHD and RHD vehicles.


    1. Turn the engine switch off.

    2. Turn the engine switch on (ACC) and wait at least 5 seconds.

    3. A01Q992C01
      *a Example (for LHD)

      Turn the engine switch on (IG) while pressing the air conditioning control assembly "AUTO" switch and "Recirculation/Fresh" switch simultaneously. Hold both switches until the indicator check screen appears.

    4. A01QBIMC01
      *a Example (for LHD)
      *b Indicator Blinking Pattern
      *c On
      *d Off
      *e 1 second

      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.

      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. A01QB77C01
      *a Example (for LHD)
      *b Diagnostic Trouble Code

      Read the DTCs 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.

      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.

    4. A01QCU4C01
      *a Example (for LHD)

      If the DTCs are difficult to read because they change automatically, push the driver side "TEMP" 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 driver side "TEMP" switch is pushed.

      Tech Tips

      Press the "OFF" switch to finish panel diagnosis.

    5. Clear DTCs.


      1. A01Q9A4C01
        *a Example (for LHD)

        During the sensor check, press the "FRONT DEF" switch and "REAR DEF" switch simultaneously.