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Home >> Lexus >> 2020 >> UX 200 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Air Conditioning System - Diagnostic Codes (2 Of 2) & Symptom Tests) (Hybrid)) >> AIR CONDITIONING SYSTEM (for HV Model) >> No Warm Air Comes Out [10/2018 - ] >> Procedure

No Warm Air Comes Out [10/2018 - ]: Procedure

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  1. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    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

      After warming up the engine, the temperature value displayed is within the range specified in the normal condition column.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO COOLING SYSTEM. Refer to  ON-VEHICLE INSPECTION [10/2018 - 10/2019]  , or refer to  ON-VEHICLE INSPECTION [10/2019 - ] 

    Result: 

    OK 

    See step  2

  2. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Air Conditioner / Active Test.
    5. Perform the Active Test according to the display on the Techstream.

      Body Electrical > Air Conditioner > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Air Mix Servo Targ Pulse(D) No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix) pulse Min.: 128
      Max.: 383      		 Operates between 165 and 257 pulses
      Air Mix Servo Targ Pulse(P) No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix) pulse Min.: 128
      Max.: 383      		 Operates between 255 and 347 pulses

      Body Electrical > Air Conditioner > Active Test 

      Tester Display
      Air Mix Servo Targ Pulse(D)

      Body Electrical > Air Conditioner > Active Test 

      Tester Display
      Air Mix Servo Targ Pulse(P)

      OK

      Each damper servo motor operates.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEATER RADIATOR UNIT SUB-ASSEMBLY. Refer to  DISASSEMBLY [10/2018 - 10/2020]  , or refer to  DISASSEMBLY [10/2020 - ] 

    Result: 

    NG 

    GO TO DTC TROUBLESHOOTING PROCEDURE FOR MALFUNCTIONING DAMPER SERVO MOTOR. Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2018 - 10/2019]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2019 - 10/2020]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2020 - 07/2022]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [07/2022 - ] 

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