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HOMESERVICE MANUALSHYUNDAI2009TUCSON LIMITED, 2.0 BREPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSDTC CODES - HVAC SYSTEMB2409 DIRECTION CONTROL MOTOR-DRIVERCOMPONENT INSPECTION
2009 Hyundai Tucson Limited, 2.0 B

Component Inspection

2009 Hyundai Tucson Limited, 2.0 BSECTION Component Inspection
  1. Check actuator.
    1. Ignition "OFF"
    2. Disconnect Driver Direction Potentiometer.
    3. Verify that the Mode Actuator operates to the vent mode when connecting 12V to the terminal "3" and grounding terminal "4".
    4. Verify that the Mode Actuator operates to the def mode when the connections are reversed.
      Fig 1: Connecting 12V To Terminal 3 And Grounding Terminal 4
      G06232921Courtesy 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 Direction Potentiometer.
    3. Measure voltage between terminal "5" and "6" of Driver Direction Potentiometer as the mode switch is operated.

      Specification : Refer the specifications in Fig 3

      Fig 2: Measuring Voltage Between Driver Direction Potentiometer Terminal 5 And 6
      G06232922Courtesy of HYUNDAI MOTOR CO.
      TERMINAL VOLTAGE REFERENCE

      Door position Voltage (3-4) Error detecting
      VENT 0.3 ± 0.15V Under voltage : 0.08V or less
      Over voltage : 4.92V or more
      BI-LEVEL (1) 1.35 ± 0.4V
      BI-LEVEL (2) 2.25 ± 0.4V
      FLOOR 3.0 ± 0.4V
      MIX 3.6 + 0.4V
      DEF 4.7 + 0.15V
      Fig 3: Direction Potentiometer Graph
      G06232923Courtesy 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 "19" and "20" of Heater & A/C controller while operating the anode switch.

      Specification :Approx. 12V

      Fig 4: Measuring Voltage Between Heater & A/C Controller Terminal 19 And 20
      G06232924Courtesy 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.