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Home >> Lexus >> 2020 >> ES 300h Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 219 (Heating / Air Conditioning System (Except Hybrid) - Diagnostic Codes & Symptom Tests) >> AIR CONDITIONING SYSTEM (for Gasoline Model) >> A/C Switch Indicator does not Turn On [06/2018 - ] >> Procedure

A/C Switch Indicator does not Turn On [06/2018 - ]: Procedure

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  1. CHECK MALFUNCTION STATUS 
    1. Check the malfunction status of switch indicators on the air conditioning control assembly.

      Result

      Result  Proceed to 
      Indicators are not always illuminated A
      Indicators are not illuminated only immediately after starting the engine B

    Result: 

    GO TO INITIALIZATION. Refer to  INITIALIZATION [06/2018 - ] 

    Result: 

    See step  2

  2. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Air Conditioner / Data List.
    5. Read the Data List according to the display on the Techstream.

      Body Electrical > Air Conditioner > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Ambient Temp Sensor Thermistor assembly Min.: -23.30°C (-9.94°F)
      Max.: 65.95°C (150.71°F)
      Actual ambient temperature displayed Thermistor assembly circuit malfunction
      • When open circuit: -23.30°C (-9.94°F)
      • When short circuit: 65.95°C (150.71°F)

      Body Electrical > Air Conditioner > Data List 

      Tester Display
      Ambient Temp Sensor

      OK

      The value displayed is 0°C (32°F) or higher.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET. Refer to  ON-VEHICLE INSPECTION [06/2018 - ] 

    Result: 

    NG 

    GO TO OTHER DIAGNOSIS PROCEDURE (Ambient Temperature Display System). Refer to  Ambient Temperature Display System [06/2018 - ]