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Home >> Toyota >> 2020 >> RAV4 XLE, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 64 (Heating / Air Conditioning System (HV) - Diagnostic Codes (3 Of 3) & Symptom Tests) >> AIR CONDITIONING SYSTEM (for HV Model) >> Recirculated/Fresh Air Modes Switch without User Input [02/2019 - 08/2020] >> Procedure

Recirculated/Fresh Air Modes Switch without User Input [02/2019 - 08/2020]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK CUSTOMIZE SETTING 
    1. Use the following customize setting methods to check if the automatically fresh/recirculation mode is "ON". If the setting is on, select the setting to "OFF".

      Refer to CUSTOMIZE PARAMETERS [02/2019 - 10/2022]

      • Check setting using Techstream
      • Check setting by multi-display

      OK

      Customize setting is "OFF".

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    CHANGE CUSTOMIZE SETTING IS ON 

    Result: 

    OK 

    See step  2

  2. READ VALUE USING TECHSTREAM (AMBIENT TEMP SENSOR) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    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 system 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 of the display does not change frequently.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO AMBIENT TEMPERATURE DISPLAY SYSTEM. Refer to  Ambient Temperature Display System [02/2019 - 06/2020]  , or refer to  Ambient Temperature Display System [06/2020 - 08/2020]  

    Result: 

    OK 

    See step  3

  3. READ VALUE USING TECHSTREAM (COOLANT TEMPERATURE) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Data List.
    5. Read the Data List according to the display on the Techstream.

      Powertrain > Engine > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Coolant Temperature Engine coolant temperature Min.: -40°C (-40°F), Max.: 140°C (284°F) 75 to 100°C (167 to 212°F): After warming up This is the engine coolant temperature.
      HINT: 
      • After warming up the engine, the engine coolant temperature will be 75 to 100°C (167 to 212°F).
      • After a long soak, the engine coolant temperature, intake air temperature and ambient air temperature will be approximately equal.
      • If the value is -40°C (-40°F), or higher than 135°C (275°F), the sensor circuit is open or shorted.
      • Check if the engine overheats if the value indicated is higher than 135°C (275°F).

      Powertrain > Engine > Data List 

      Tester Display
      Coolant Temperature

      OK

      The value of the display does not change frequently.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO COOLING SYSTEM. Refer to  ON-VEHICLE INSPECTION [02/2019 - ] 

    Result: 

    OK 

    See step  4

  4. CHECK REFRIGERANT PRESSURE 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    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
      Regulator Pressure Sensor Air conditioner pressure sensor Min.: -456.6 kPaG (gauge)
      Max.: 3294.3 kPaG (gauge)      		 Actual refrigerant pressure displayed
      • Refrigerant line (gas leak etc.)
      • Air conditioner pressure sensor system malfunction

      Body Electrical > Air Conditioner > Data List 

      Tester Display
      Regulator Pressure Sensor
    6. Install a manifold gauge set.
      1. for HFC-134a (R134a): Refer to ON-VEHICLE INSPECTION [11/2018 - 08/2020]
      2. for HFO-1234yf (R1234yf): Refer to ON-VEHICLE INSPECTION [02/2019 - ]
    7. Read the manifold gauge pressure when the following conditions are met.
      1. Prepare the vehicle according to the table below.
        MEASUREMENT CONDITION:

        Item Condition
        Vehicle Condition Ignition switch ON (READY)
        Doors Fully closed (windows also fully closed)
        A/C Switch On
        Recirculation/fresh Control Switch Recirculation
        Set Temperature MAX COLD
        Blower Speed HI
        Air Conditioning Air Inlet Temperature 25 to 35°C (77 to 95°F)

        Standard Pressure

        Low pressure side 

        150 to 250 kPa (1.5 to 2.5 kgf/cm2 , 22 to 36 psi)

        High pressure side 

        1370 to 1570 kPa (14 to 16 kgf/cm2 , 199 to 228 psi)

    8. Compare the values displayed in the Data List and on the manifold gauge.

      OK

      The values displayed in the Data List and on the manifold gauge match.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    GO TO ON-VEHICLE INSPECTION (CHECK REFRIGERANT PRESSURE USING GAUGE). Refer to  PROCEDURE - Step 2 

    Result: 

    NG 

    REPLACE AIR CONDITIONER PRESSURE SENSOR. Refer to  REMOVAL [11/2018 - 08/2020] 

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