Air Conditioning System Check Mode Procedure

Heater & Air Conditioning System. Lexus Is250, Is220D. Gse20 Ale20
Air Conditioning. Lexus Is250, Is220D. Gse20 Ale20

  1. LIST OF OPERATION METHODS

  1. INDICATOR CHECK

  1. DTC CHECK (SENSOR CHECK)

  1. ACTUATOR CHECK

Air Conditioning System -- Check Mode Procedure



LIST OF OPERATION METHODS


  1. By operating each of the A/C control switches as shown in the diagram below, it is possible to enter the diagnostic check mode.


    Lexus Is250, Is220D. Gse20 Ale20.Air Conditioning.Air Conditioning System.Air Conditioning System Check Mode Procedure


INDICATOR CHECK

  1. Turn the engine switch off.



  2. Turn the engine switch on (IG) while pressing the A/C control "AUTO" switch and "R/F" switch simultaneously.


    Lexus Is250, Is220D. Gse20 Ale20.Air Conditioning.Air Conditioning System.Air Conditioning System Check Mode Procedure



  3. The indicator check is automatically performed when panel diagnosis is activated. Check that the indicators light up and go off at 1 second intervals 4 times in succession.


    Lexus Is250, Is220D. Gse20 Ale20.Air Conditioning.Air Conditioning System.Air Conditioning System Check Mode Procedure

    HINT:
    1. The sensor check automatically starts when the indicator check is completed.
    2. Press the "OFF" switch to cancel the check mode.
    3. If a navigation system is installed, the indicator will blink and the buzzer will sound.

DTC CHECK (SENSOR CHECK)

  1. Start the engine and warm it up.

  2. Perform the indicator check.

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


  3. Push the "R/F" switch to perform the actuator check.


    Lexus Is250, Is220D. Gse20 Ale20.Air Conditioning.Air Conditioning System.Air Conditioning System Check Mode Procedure

    NOTICE:
    1. In the sensor check mode, which is automatically transferred from the indicator check mode, troubleshooting may be partially performed. Be sure to perform the actuator check, and then the sensor check again.
    2. If the check is performed in a dark place, DTC 21 may be displayed.
    HINT:
    When there are no problems, DTC 00 is output.

  4. If the steps are difficult to read because they change automatically, push the "UPDr" 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 "UPDr" switch is pushed.

  5. Read the code displayed on the panel.

    HINT:
    Refer to the DTC chart (Diagnostic Trouble Code chart) for details of the codes (Click here).
    1. Push the "OFF" switch to finish panel diagnosis.
    2. Push the "R/F" switch to enter the actuator check mode.

ACTUATOR CHECK

  1. Start the engine and warm it up.

  2. Perform the indicator check.



  3. Push the "R/F" switch to perform the actuator check.


    Lexus Is250, Is220D. Gse20 Ale20.Air Conditioning.Air Conditioning System.Air Conditioning System Check Mode Procedure

    HINT:
    Be sure to perform the actuator check after starting the engine.


  4. As the actuator check is repeated from steps 1 to 10 at 1 second intervals, check the temperature and air flow visually and by hand.


    Lexus Is250, Is220D. Gse20 Ale20.Air Conditioning.Air Conditioning System.Air Conditioning System Check Mode Procedure

    HINT:
    1. The display blinks at 1 second intervals in the step operation.
    2. As an example, the illustration shows that display code 21 is output.
    3. Push the "OFF" switch to finish panel diagnosis.
    4. Push the "AUTO" switch to enter the sensor check mode.

    Step No.
    		Display Code
    		Conditions
    Blower Level
    		Air Mix Damper
    		Airflow Vent
    		Air Inlet Damper
    		Cool Air Bypass Damper
    		Compressor
    1
    		0
    		0
    		0 % open
    		FACE
    		FRESH
    		-14 %
    		OFF
    2
    		1
    		1
    		0 % open
    		FACE
    		FRESH
    		-14 %
    		OFF
    3
    		2
    		17
    		0 % open
    		FACE
    		RECIRCULATION / FRESH
    		-14 %
    		ON
    4
    		3
    		17
    		0 % open
    		FACE
    		RECIRCULATION
    		113.50 %
    		ON
    5
    		4
    		17
    		50 % open
    		B/L
    		RECIRCULATION
    		113.50 %
    		ON
    6
    		5
    		17
    		50 % open
    		B/L
    		RECIRCULATION
    		113.50 %
    		ON
    7
    		6
    		17
    		50 % open
    		FOOT
    		FRESH
    		113.50 %
    		ON
    8
    		7
    		17
    		100 % open
    		FOOT-0
    		FRESH
    		113.50 %
    		ON
    9
    		8
    		17
    		100 % open
    		F/D
    		FRESH
    		113.50 %
    		ON
    10
    		9
    		31
    		100 % open
    		DEF
    		FRESH
    		113.50 %
    		ON


  5. If the steps are difficult to read because they change automatically, push the "UPDr" 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 "UPDr" switch is pushed.


    Lexus Is250, Is220D. Gse20 Ale20.Air Conditioning.Air Conditioning System.Air Conditioning System Check Mode Procedure

    HINT:
    1. Push the "OFF" switch to finish the panel diagnosis.
    2. Push the "R/F" switch to enter the sensor check mode.