Hyundai Tucson: Heater / Mode Control Actuator Repair procedures

Inspection
1.
Ignition "OFF”
2.
Disconnect the connector of mode control actuator.
3.
Verify that the mode control actuator operates to the defrost mode when connecting 12V to the terminal 3and grounding terminal 4.
4.
Verify that the mode control actuator operates to the vent mode when connecting in the reverse.

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

5.
Check the voltage between terminals 5 and 6.
Door position
Voltage (5-6)
Error detecting
Vent
0.3 ± 0.15V
Low voltage :0.1V or less
Defrost
4.7 ± 0.15V
High voltage :4.9V or more

It will feedback current position of actuator to controls.
6.
If the measured voltage is not specification, substitute with a known-good mode control actuator and check for proper operation.
7.
If the problem is corrected, replace the mode control actuator.
Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Remove the crash pad left side cover (A).

3.
Remove the extension cover(A)

4.
Remove the crash pad lower cover (A).

5.
Disconnect the diagnosis connector (A).

6.
Remove the reinforcing panel (A).

7.
Remove the shower duct (A).

8.
Disconnect the temperature control actuator connector (A).
9.
Loosen the mounting screw and then remove the temperature control actuator (B).

10.
Install in the reverse order of removal.
Mode Control Actuator Description and Operation
Description The mode control actuator is located at the heater unit. It adjusts position of mode door by operating mode control actuator based on signal of A/C control unit. Pressing mode select ...

Blower
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