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Home >> Toyota >> 2022 >> Corolla Cross L, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 25 (Heating / Air Conditioning System (Except HEV, Auto A/C) - Diagnostic Codes & Symptom Tests) >> AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System) >> Recirculated/Fresh Air Modes do not Switch [11/2022 - ] >> Procedure

Recirculated/Fresh Air Modes do not Switch [11/2022 - ]: Procedure

WARNING: This page is about a different car, the 2025 Toyota Corolla Cross, 2024 Toyota Corolla Cross, and 2023 Toyota Corolla Cross. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY 
    1. Check that the No. 1 blower damper servo sub-assembly is installed correctly.

      OK

      The No. 1 blower damper servo sub-assembly is installed correctly.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    INSTALL NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY. Refer to  REASSEMBLY [09/2021 - ] 

    Result: 

    OK 

    See step  2

  2. CHECK FOR DTC 
    1. Check for DTCs.

      Body Electrical > Air Conditioner > Trouble Codes 

      Result

      Result Proceed to
      B143A-87 and B143B-7F is not output A
      B143A-87 is output B
      B143B-7F is output C

    Result: 

    B 

    GO TO DTC B143A-87. Refer to  DTC B143A-87: Lost Communication with Air Inlet Damper Control Servo Motor LIN Missing Message [11/2022 - ]  

    Result: 

    C 

    GO TO DTC B143B-7F. Refer to  DTC B143B-7F: Air Inlet Damper Control Servo Motor Actuator Stuck Off [11/2022 - ]  

    Result: 

    A 

    See step  3

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

      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: 

    OK 

    REPLACE AIR CONDITIONER UNIT ASSEMBLY. Refer to  REMOVAL [11/2022 - ] 

    Result: 

    NG 

    GO TO COOLING SYSTEM. Refer to  ON-VEHICLE INSPECTION [09/2021 - ] 

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