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

Self Diagnosis
1.
Self-diagnosis process

2.
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)

3.
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.
5.
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

Components (1) Control Panel (Dual A/C & Heater Controller - A) Connector pin function (1) ConnectorPIN NO.FunctionConnectorPIN NO.FunctionConnector (A)1ILL+(TAIL)Connector (A)29ECV (+)2SENSOR REF ...

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