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.

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  4. INDICATOR CHECK


    1. Turn the power switch off.

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

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

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      Text in Illustration
      *1

      Radio Receiver Assembly (w/ Navigation System)

      (for LHD)

      		 *2

      Radio Receiver Assembly (w/o Navigation System)

      (for LHD)
      *3

      Radio Receiver Assembly (w/ Navigation System)

      (for RHD)

      		 *4

      Radio Receiver Assembly (w/o Navigation System)

      (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.

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      Tech Tips


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

      • Press the "FAN DN" switch to cancel the check mode.

      Text in Illustration
      *1 Multi-display Assembly (w/ Navigation System) *2 Accessory Meter Assembly (w/o Navigation System)
      *3

      Radio Receiver Assembly (w/ Navigation System)

      (for LHD)

      		 *4

      Radio Receiver Assembly (w/o Navigation System)

      (for LHD)
      *5

      Radio Receiver Assembly (w/ Navigation System)

      (for RHD)

      		 *6

      Radio Receiver Assembly (w/o Navigation System)

      (for RHD)

  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. Read the DTC displayed on the multi-display assembly*1 or the accessory meter assembly*2.

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      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.


      • *1: w/ Navigation System

      • *2: w/o Navigation System

      Text in Illustration
      *1

      Multi-display Assembly (w/ Navigation System)

      (for LHD)

      		 *2

      Multi-display Assembly (w/ Navigation System)

      (for RHD)
      *3

      Accessory Meter Assembly (w/o Navigation System)

      (for LHD)

      		 *4

      Accessory Meter Assembly (w/o Navigation System)

      (for RHD)
      *5 Diagnostic Trouble Code (DTC) - -

    4. If the steps are difficult to read because they change automatically, press the "FRONT DEF" 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 DEF" switch is pressed.

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      Tech Tips

      Press the "FAN DN" switch to finish panel diagnosis.

      Text in Illustration
      *1

      Radio Receiver Assembly (w/ Navigation System)

      (for LHD)

      		 *2

      Radio Receiver Assembly (w/o Navigation System)

      (for LHD)
      *3

      Radio Receiver Assembly (w/ Navigation System)

      (for RHD)

      		 *4

      Radio Receiver Assembly (w/o Navigation System)

      (for RHD)

    5. Clear the DTC


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

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        Text in Illustration
        *1

        Radio Receiver Assembly (w/ Navigation System)

        (for LHD)

        		 *2

        Radio Receiver Assembly (w/o Navigation System)

        (for LHD)
        *3

        Radio Receiver Assembly (w/ Navigation System)

        (for RHD)

        		 *4

        Radio Receiver Assembly (w/o Navigation System)

        (for RHD)