Kia Optima Hybrid: Controller / Heater & A/C Control Unit(Dual) Repair procedures

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual / Heating,Ventilation, Air Conditioning / Controller / Heater & A/C Control Unit(Dual) Repair procedures

Self Diagnosis

1.	Self-diagnosis process

How to read self-diagnostic code

After the display panel flickers three times every 0.5 second, the corresponding fault code flickers on the setup temperature display panel every 0.5 second and will show two figures. Codes are displayed in numerical format

Fault code

Display	Fail description
00	Normal
11	In-car sensor open
12	In-car sensor short
13	Ambient sensor open
14	Ambient sensor short
17	Evaporator sensor open
18	Evaporator sensor short
19	Temp door potentiometer open/short- Drive
20	Temp door potentiometer fault- Drive
21	Mode door potentiometer open/short
22	Mode door potentiometer fault
23	Auto defog sensor open
24	Auto defog sensor short
25	Intake door potentiometer open
26	Intake door potentiometer short
32	Temp door potentiometer open/short - Passenger
33	Temp door potentiometer fault - Passenger
43	Defog door potentiometer open/short
44	Defog door potentiometer fault
45	APT CAN signal fault
47	RPM CAN signal fault
48	Vehicle speed CAN signal fault
49	Engine coolant temp CAN signal fault
50	Cluster ion generator fault
71	ECV fault (open)

Fault code display

(1)	Continuance operation : DTC code is one.

(2)	Continuance operation : DTC code is more two.

(3)

STEP operation

A.	Normal or one fault code is same as a continuance operation.

B.	DTC code as more two.

4.	If fault codes are displayed during the check, Inspect malfunction causes by referring to fault codes.

Fail safe

(1)	In-car temperature sensor: Control with the value of 25°C(77°F)

(2)	Ambient temperature sensor: Control with the value of 20°C(67°F)

(3)	Evaporator temperature sensor: Control with the value of -2°C(28.4°F)

(4)	Water temperature sensor: Control with the value of -2°C(28.4°F) / Estimated torque calculation : 90°C(194°F)

(5)	Temperature control actuator (Air mix potentiometer): If temperature setting 17°C-24.5°C, fix at maximum cooling position. If temperature setting 25°C-32°C, fix at maximum heating position.

(6)	Mode control actuator (Direction potentiometer): Fix vent position, while selecting vent mode. Fix defrost position, while selecting all except vent mode.

(7)	Intake control actuator : Fix fresh position, while selecting fresh mode. Fix recirculation position, while selecting recirculation mode.

Replacement

•	When prying with a flat-tip screwdriver, wrap it with protective tape, and apply protective tape around the related parts, to prevent damage.

•	Use a plastic panel removal tool to remove interior trim pieces to protect from marring the surface.

•	Take care not to bend or scratch the trim and panels.

•	Put on gloves to protect your hands.

1.	Using a screwdriver or remover, remove the crash pad side cover (A).

2.	After loosening the mounting screws, then remove the crash pad lower panel (A).

3.	Disconnect the crash pad lower switch connectors (A).

4.	Disconnect the diagnosis connector (B) and crash pad under lamp connector (C). [LH]

5.	Disconnect the start/stop button connector (D). [RH]

6.	Using a screwdriver or remover, remove the crash pad garnish [RH] (A).

7.	After loosening the mounting screws, then remove the heater control unit panel (A).

8.	Disconnect the connectors (A) and hose (B).

9.	After loosening the mounting screws, then remove the heater control unit (A).

10.

Installation is the reverse of removal.

•	Make sure the connector is plugged in properly.

•	Replace any damaged clips.

Heater & A/C Control Unit(Dual) Components and Components Location

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