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Home >> Lexus >> 2025 >> NX 350h >> Repair and Diagnosis >> External Pages >> Different car >> Section 71 (Heating / Air Conditioning System - Diagnostic Codes, Circuit Tests & Symptom Tests) >> AIR CONDITIONING SYSTEM (for Gasoline Model) >> A/C Switch Indicator does not Turn On [11/2021 - ] >> Procedure

A/C Switch Indicator does not Turn On [11/2021 - ]: Procedure

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  1. CHECK MALFUNCTION STATUS 
    1. Check the malfunction status of switch indicators on the radio and display receiver assembly.

      Result

      Result  Proceed to 
      A/C switch indicators are not always illuminated A
      A/C switch indicators are not illuminated only immediately after starting the engine B

    Result: 

    GO TO INITIALIZATION. Refer to  INITIALIZATION [11/2021 - ] 

    Result: 

    See step  2

  2. READ VALUE USING GTS 
    1. Read the Data List according to the display on the GTS.

      Body Electrical > Air Conditioner > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Ambient Temperature Sensor Ambient temp. sensor (thermistor assembly) -327.68 to 327.67°C Actual ambient temperature displayed Ambient temp. sensor (thermistor assembly) circuit malfunction

      Body Electrical > Air Conditioner > Data List 

      Tester Display
      Ambient Temperature Sensor

      OK

      The display is as specified in the normal condition column (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 [11/2021 - ] 

    Result: 

    NG 

    GO TO OTHER DIAGNOSIS PROCEDURE (Ambient Temperature Display System). Refer to  Ambient Temperature Display System [11/2021 - ]