Hyundai Santa Cruz Owners & Service Manuals

Hyundai Santa Cruz: 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


- Inspection

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. Sensor ground
5. Feedback signal
6. Sensor (+ 5V)
7. Vent mode


4.Connect the mode control actuator connector.

5.Turn the ignition switch ON.

6.Check the voltage between terminal 5 and 4.

Door positionVoltage (V)Error detecting
Vent0.3 ± 0.15VLow voltage : 0.1V or less
High voltage : 4.9V or more
Defrost3.29 ± 0.15V

* It will feedback the current position of the actuator to controls.

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.

- Replacement

1.Disconnect the negative (-) battery terminal.

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

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

4.Install in the reverse order of removal.

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