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 GTS 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.

      A005H88E02

  4. INDICATOR CHECK


    1. Turn the ignition switch off.

    2. Turn the ignition switch to ON while simultaneously pressing the AUTO switch and the recirculation switch*1*2 or rear defogger switch*3.

      *1: for RHD (except 1NZ-FE)

      *2: for LHD

      *3: for 1NZ-FE

      A005HEKE01
      A005MAXE01
      A005GQDE01
      Text in Illustration
      *A for RHD (except 1NZ-FE) *B for LHD
      *C for 1NZ-FE - -
    3. A005LB2E07
      Text in Illustration
      *a Blinking Pattern
      *b 1 second
      *c ON
      *d OFF
      *e 4 times

      Check that all indicators and the display area are turned on and off 4 times in succession at 1-second intervals.

      Tech Tips

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

    4. Press the OFF switch to terminate the panel diagnosis.

  5. DTC CHECK (SENSOR CHECK)


    1. Perform the indicator check.

      Tech Tips

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

    2. A005GH3

      Check the sensor check results displayed on the set temperature display.

      Results Code Display
      Present malfunction Blinks

      Tech Tips


      • The illustration shows the display when code 12 is output.

      • When two or more sensor check codes are detected, the codes are displayed in ascending numerical order.

      • In cases with two or more codes, making them difficult to read, press the temperature up switch to activate the step operation and display them one by one.

      • The codes are displayed in ascending numerical order as the temperature up switch is pressed.

    3. When any sensor check codes are displayed, refer to the DTC chart Click here.

    4. Press the OFF switch to terminate the panel diagnosis.

  6. PANEL DIAGNOSIS (CLEAR SENSOR CHECK CODE)


    1. Inspect, and repair or replace the malfunctioning parts.

    2. Clear the sensor check codes.

      A005LDUE02
      Text in Illustration
      *A for RHD *B for LHD

      1. While pressing the front defogger switch during sensor check mode, press the rear defogger switch.

    3. Perform the sensor check and confirm that normal code 00 is displayed.