Kia Optima Hybrid: 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 7.
4.
Verify that the mode control actuator operates to the vent mode when connecting in the reverse.

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

5.
Check the voltage between terminals 5 and 6.
Specification
Door position
Voltage(4-5)
Error detecting
Max. cooling
0.3 ± 0.15V
Low voltage :0.1V or less
Max. heating
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.
Using the screwdriver, remove the side cover (A).

3.
Loosen the mounting screw and then remove the crash pad lower cover (A).

4.
Disconnect the connector (A), and then remove the crash pad lower cover.

5.
Remove the shower duct (A).

6.
Loosen the mounting bolts and than remove the BCM.
(Refer to BE group - “BCM”)
7.
Disconnect the mode control actuator connector (A).
8.
Loosen the mounting screw and then remove the mode control actuator (B).

9.
Installation is 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 switch ...

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