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HOMESERVICE MANUALSHYUNDAI2009TUCSON LIMITED, 2.0 BREPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSDTC CODES - HVAC SYSTEMB2406 AIR MIX MOTOR (DRIVER)COMPONENT INSPECTION
2009 Hyundai Tucson Limited, 2.0 B

Component Inspection

2009 Hyundai Tucson Limited, 2.0 BSECTION Component Inspection
  1. Check actuator motor.
    1. Ignition "OFF"
    2. Disconnect Driver Air Mix Potentiometer.
    3. Verify that the temperature actuator operates to the hot position when connecting 12V to the terminal "3" and grounding terminal "4".
    4. Verify that the temperature actuator operates to the cool position when the connections are reversed.
      Fig 1: Connecting 12V To Terminal 3 And Grounding Terminal 4
      G06232903Courtesy of HYUNDAI MOTOR CO.
    5. Does the actuator work properly?

      YES 

      • Check potentiometer.

      NO 

      • Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  2. Check potentiometer
    1. Ignition "ON"
    2. Connect Driver Air Mix Potentiometer.
    3. Measure voltage between terminal "5" and "6" of Driver Air Mix Potentiometer while operating the temp. switch.

      Specification : Refer the specifications in Fig 3)

      Fig 2: Measuring Voltage Between Driver Air Mix Potentiometer Terminal 5 And 6
      G06232904Courtesy of HYUNDAI MOTOR CO.
      TERMINAL VOLTAGE REFERENCE

      Door position Voltage (3-4) Error detecting
      MAX. Cooling 0.3 ± 0.15V Low voltage : 0.08V or less
      MAX. Heating 4.7 ± 0.15V High voltage : 4.9V or more
      Fig 3: Air Mix Potentiometer Graph
      G06232905Courtesy of HYUNDAI MOTOR CO.
    4. Is the measured voltage within specifications in Fig 3?

      YES 

      • Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

      NO 

      • Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  3. Check Heater & A/C controller.
    1. Engine "ON"
    2. Connect Heater & A/C controller.
    3. Measure voltage between terminal "16" and "17" of Heater & A/C controller while operating the temp, switch.

      Specification :Approx. 12V

      Fig 4: Measuring Voltage Between Heater & A/C Controller Terminal 16 And 17
      G06232906Courtesy of HYUNDAI MOTOR CO.
    4. Is the measured voltage within specifications?

      YES 

      • Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

      NO 

      • Substitute with a known-good Heater & A/C controller and check for proper operation.

        If the problem is corrected, replace Heater & A/C controller and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.