Hyundai Santa Fe: Heater / Mode Control Actuator. Repair procedures

Hyundai Santa Fe (TM) 2019-2025 Service Manual / Heating,Ventilation And Air Conditioning / Heater / Mode Control Actuator. Repair procedures

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 7.
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.
Specification
Door position
Voltage (V)
Error detecting
Vent
 0.3 ± 0.15
 Low voltage : 0.1V or less
High voltage : 4.9V or less
Defrost
 4.7 ± 0.15

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 - "Main Crash Pad Assembly")
3.
Separate the mode control actuator connector (B) and loosen the mounting screw and remove the mode control actuator (A).
4.
Install in the reverse order of removal.

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