Hyundai Tucson: Heater / Mode Control Actuator

- Description The mode control actuator is located at the heater unit.It adjusts the position of the mode door by operating the mode control actuator based on the signal of the A/C control unit. Pressing the mode select switch makes the mode control actuator shift in order of Vent → Bi-Level → Floor → Mix. - Components Location

1. Mode control actuator

1.Turn the ignition switch OFF.

2.Disconnect the mode control actuator connector.

3.Verify that the mode control actuator operates to the defrost mode when connecting 12V to terminal 3 and grounding terminal 4.Verify that the mode control actuator operates to the vent mode when connected in reverse.

1. -
2. -
3. Defrost mode
4. Vent mode
5. Sensor ground
6. Feedback signal
7. Sensor (+ 5V)

4.Connect the mode control actuator connector.

5.Turn the ignition switch ON.

6.Check the voltage between terminal 5 and 4.

7.If the measured voltage is not within specification, substitute with a known-good mode control actuator and check for proper operation.

8.Replace the mode control actuator if it is proved that there is a problem with it.

1.Disconnect the negative (-) battery terminal.

2.Remove the main crash pad assembly.(Refer to Body (Interior and Exterior) - "Main Crash Pad Assembly")

3.Remove the DC DC converter.(Refer to Engine Electrical System - "DC DC converter")

4.Disconnect the mode control actuator connector (A) and loosen the mounting screw and remove the mode control actuator (B).

5.Install in the reverse order of removal.