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HOMESERVICE MANUALSHYUNDAI2009TUCSON LIMITED, 2.0 BREPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSDTC CODES - HVAC SYSTEMB1209 INTAKE POTENTIOMETER SHORT (HIGH)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 Intake Potentiometer.
    3. Verify that the temperature actuator operates to the fresh position when connecting 12V to the terminal "3" and grounding terminal "4".
    4. Verify that the temperature actuator operates to the recirculation position when the connections are reversed.
      Fig 1: Connecting 12V To Terminal 3 And Grounding Terminal 4
      G06232822Courtesy of HYUNDAI MOTOR CO.
    5. Does the actuator work properly?

      YES 

      • Go to " 2 Check potentiometer" 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.
  2. Check potentiometer
    1. Ignition "ON"
    2. Connect Intake potentiometer.
    3. Measure voltage between terminal "5" and "6" of Intake potentiometer while operating Intake switch.

      Specification : Refer to the Specification .

      Fig 2: Measuring Voltage Between Intake Potentiometer Terminal 5 And 6
      G06232823Courtesy of HYUNDAI MOTOR CO.
      TERMINAL VOLTAGE REFERENCE

      Door position Voltage (5-6) Error detecting
      Fresh 0.3 Ω 0.15V Low voltage : 0.08V or less
      Recirculation 4.7 Ω 0.15V High voltage : 4.9V or more

      Specifications : Voltage value of Intake potentiometer as a function of position of Intake.

    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 actuator and check for proper operation. If the problem is corrected, replace actuator 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.