AIR CONDITIONING SYSTEM Recirculated/Fresh Air Modes do not Switch

DESCRIPTION

If the fresh/recirculation mode does not change or exhaust gas can be smelled even while set to recirculation mode, the following causes are possible.

Symptom Factor

  • Fresh/recirculation mode does not change

  • Fresh/recirculation mode does not change automatically

  • Exhaust gas can be smelled even while set to recirculation mode

  • Blower servo motor malfunction

  • Blower damper and link operation (jamming)

  • Foreign object jammed in door

  • Air conditioning radiator assembly malfunction

  • High engine coolant temperature

  • Smog ventilation sensor false opinion on infringement

PROCEDURE


  1. CHECK NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY


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

      OK
      No. 1 blower damper servo sub-assembly is installed correctly.
      Result
      Proceed to
      OK
      NG

    NG

    REINSTALL NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY Click here

    OK

  2. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Body Electrical > Air Conditioner > Trouble Codes
      OK
      DTC B1442 is not output
      Result
      Proceed to
      OK
      NG

    NG

    GO TO DTC B1442 Click here

    OK

  3. READ VALUE USING GTS (COOLANT TEMPERATURE)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List.

    5. 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.

      Tech Tips


      • 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

    NG

    GO TO COOLING SYSTEM Click here

    OK

  4. INSPECT SMOG VENTILATION SENSOR


    1. Remove the smog ventilation sensor.

      Click here

    2. Inspect the smog ventilation sensor.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE AIR CONDITIONING RADIATOR ASSEMBLY Click here

    NG

    REPLACE SMOG VENTILATION SENSOR Click here