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 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.

      A01J9A6E04

  4. INDICATOR CHECK


    1. Turn the power switch off.

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

    3. A01J90TE01
      Text in Illustration
      *1 A/C Control Assembly (for LHD)
      *2 A/C Control Assembly (for RHD)

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

    4. A01J9V6E02
      Text in Illustration
      *1 A/C Control Assembly (for LHD)
      *2 A/C Control Assembly (for RHD)

      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 the 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. A01JD20E01
      Text in Illustration
      *1 A/C Control Assembly (for LHD)
      *2 A/C Control Assembly (for RHD)
      *3 Diagnostic Trouble Code (DTC)

      Read the DTC displayed on the A/C control assembly.

      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 display DTC 12 is output.

    4. A01JCRUE01
      Text in Illustration
      *1 A/C Control Assembly (for LHD)
      *2 A/C Control Assembly (for RHD)

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

      Tech Tips

      Press the "OFF" switch to finish panel diagnosis.

    5. Clear the DTC


      1. A01J8W6E01
        Text in Illustration
        *1 A/C Control Assembly (for LHD)
        *2 A/C Control Assembly (for RHD)

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