Click here

AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System) A/C Switch Indicator does not Turn On

Click here
Click here
DTC Code DTC Name
  A/C Switch Indicator does not Turn On
Click here

DESCRIPTION

If none of the switch indicators on the air conditioning control panel (radio and display receiver assembly)*1 or air conditioning control assembly*2 illuminate, the following factors may be the cause.

Symptom Factor
A/C switch indicator does not illuminate

  • Air conditioning amplifier assembly malfunction

  • Air conditioning control panel (radio and display receiver assembly) malfunction*1

  • Air conditioning control assembly malfunction*2

  • A/C switch malfunction

  • A/C switch indicator malfunction (including when indicator turned off without switch operation)

  • Servo motor initialization (incomplete)

  • Mechanical locking of damper and damper link

  • Refrigerant pressure is extremely low

  • Low detected ambient temperature (including thermistor assembly malfunction)

Click here

PROCEDURE


  1. Click here

    CONFIRM MODEL

    Result
    Result Proceed to
    for 8 Inch Display A
    except 8 Inch Display B

  2. Click here

    CHECK MALFUNCTION STATUS


    1. Check the malfunction status of switch indicators on the air conditioning control panel (radio and display receiver assembly).

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

  3. Click here

    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

  4. Click here

    READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Air Conditioner / Data List.

    5. Read the Data List according to the display on the GTS.


      1. 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)



      1. 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

    • OK

      INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SETClick here

    • NG

      GO TO OTHER DIAGNOSIS PROCEDURE (Ambient Temperature Display System)Click here