Hyundai Tucson LM Quiz
Heating, Ventilation, and Air Conditioning

Temperature Control Actuator Repair Procedures

In this manual: Heating, Ventilation, and Air Conditioning
General Information — 1Engine Mechanical System — 44Engine Electrical System — 45Emission Control System — 24Engine Control System/Fuel System — 93Clutch System — 13Manual Transmission — 18Automatic Transmission — 87Four-Wheel Drive (4WD) System — 26Drive Shaft and Axle — 29Suspension System — 35Steering — 20Restraints — 47Brake System — 36Body (Interior and Exterior) — 53Body Electrical System — 202Heating, Ventilation, and Air Conditioning — 58
26steps
~156min
4/5difficulty
Done 0 of 26

Inspection

  1. Ignition switch OFF
  2. Disconnect the temperature control actuator connector.
  3. Make sure the temperature control actuator operates in the hot position when 12V is applied to terminal 3 and terminal 4 is grounded. Make sure the temperature control actuator operates in the cold position when the polarity is reversed. [Drive Vehicle]
    1. -
    2. -
    3. Hot Position
    4. Cold Position    		 5. Sensor Ground
    6. Feedback Signal
    7. 5 V (DC)
  4. Check the voltage between terminals 5 and 6 (actuator). Specification
    Door Position Voltage (5-6) Fault Detection
    Max. Cool 0.4 ± 0.15 V Low voltage: 0.1 V or less
    Max. Heat 4.6 ± 0.15 V High voltage: 4.9 V or more

    [Passenger]
    1. -
    2. -
    3. Cold Position
    4. Hot Position    		 5. 5 V (DC)
    6. Feedback Signal
    7. Sensor Ground
  5. Check the voltage between terminals 6 and 7 (passenger). Specification
    Door Position Voltage (5-6) Fault Detection
    Max. Cool 0.4 ± 0.15 V Low voltage: 0.1 V or less
    Max. Heat 4.6 ± 0.15 V High voltage: 4.9 V or more

    It transmits the current position of the actuator to the control unit.
  6. If the measured voltage does not conform to the specification, replace the temperature control actuator with a known good one and check that the operation is correct.
  7. If the problem is resolved, replace the temperature control actuator.

Replacement

  1. Disconnect the negative (-) battery terminal.
  2. Remove the left side airbag cover (A).
  3. Remove the extension cover (A).
  4. Remove the lower airbag cover (A).
  5. Disconnect the diagnostic connector (A).
  6. Remove the reinforcement panel (A).
  7. Remove the shower duct (A).
  8. Disconnect the temperature control actuator connector (A).
  9. Loosen the mounting screw and remove the temperature control actuator (B). [Driver]
  10. Remove the right extension cover (A).
  11. Disconnect the damper (A) from the glove box (B).
  12. Remove the glove box lift (A).
  13. Disconnect the spring (A), then remove the glove box (B).
  14. Remove the passenger airbag panel (A).
  15. Remove the glove box housing (A).
  16. Remove the shower duct (A).
  17. Disconnect the temperature control actuator connector (A).
  18. Loosen the mounting screw and remove the temperature control actuator (B). [Passenger]
  19. Install in the reverse order of removal.

Test yourself

A quick Hyundai Tucson LM quiz: every answer comes with an explanation and a link to the manual page.