Kia Optima Hybrid: Heater / Temperature Control Actuator Repair procedures

Inspection
1.
Ignition "OFF"
2.
Disconnect the connector of temperature control actuator.
3.
Verify that the temperature control actuator operates to the hot position when connecting 12V to the terminal 3 and grounding terminal 7.
Verify that the temperature control actuator operates to the cool position when connecting in the reverse.
[Drive]

1. -
2. -
3. Cool position
4. Sensor ground
5. Feedback signal
6. 5V (Vcc)
7. Hot position

4.
Check the voltage between terminals 4 and 5 (Drive).
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

[Passenger]

1. -
2. -
3. Cool position
4. Sensor ground
5. Feedback signal
6. 5V (Vcc)
7. Hot position

5.
Check the voltage between terminals 4 and 5 (Passenger).
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 temperature control actuator and check for proper operation.
7.
If the problem is corrected, replace the temperature control actuator.
Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Using the screwdriver, remove the side cover (A).

3.
Loosen the mounting screws 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 then remove the BCM.
(Refer to BE group - “BCM”)
7.
Disconnect the temperature control actuator connector (A)
8.
Loosen the mounting screw and then remove the temperature control actuator (B).

9.
Using the screw driver, remove the side cover (A).

10.
Remove the main crash pad lower cover (A).

11.
Disconnect the damper (B) and glove box lift (C) from the glove box (A).

12.
Disconnect the pin (A) and then remove the glove box (B).

13.
Loosen the mounting screw and bolts and than remove the glove box housing (A).

14.
Remove the shower duct (A).

15.
. Disconnect the temperature control actuator connector (A).
16.
Loosen the mounting screw and then remove the temperature control actuator (B).

17.
Installation is the reverse order of removal.
Temperature Control Actuator Description and Operation

Description 1. Heater unit includes mode control actuator and temperature control actuator. 2. Temperature control actuator is located at the heater unit. It regulates the temperature by the procedure ...

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