Kia Optima: Heater & A/C Control Unit(Dual). Components and Components Location

Components

Control Panel

Connector pin function

Connector pin function

Connector	PIN NO.	Function	Connector	PIN NO.	Function
Connector(A)	1	Tail (+)	Connector(A)	25	-
	2	Sensor REF (+5V)		26	Ambient Sensor (+)
	3	Hazard Signal		27	Incar Sensor (+)
	4	ACC		28	Evaporator Sensor (+)
	5	Mode Actuator (VENT)		29	ECV (+)
	6	Mode Actuator (DEF)		30	ECV (-)
	7	Mode Actuator (F/B)		31	Photo Sensor left (-)
	8	Intake Actuator (REC)		32	Photo Sensor right (-)
	9	Intake Actuator (FRE)		33	HTD
	10	Intake Actuator (F/B)		34	Rear Defog S/W
	11	Temp Actuator DR (COOL)		35	K – Line
	12	Temp Actuator DR (WARM)		36	-
	13	Temp Actuator DR (F/B)		37	-
	14	Temp Actuator PS (COOL)		38	-
	15	Temp Actuator PS (WARM)		39	-
	16	Temp Actuator PS (F/B)		40	GND
	17	C_Can HIGH	Connector(B)	1	GND
	18	C_Can LOW		2	IGN2
	19	Detent OUT(-) Signal		3	Blower Motor (+)
	20	Rheostat		4	GND
	21	Ion Signal		5	FET (GATE)
	22	Clean Signal		6	FET (DRAIN F/B)
	23	Ionizer Diagnosis		7	IGN1
	24	-		8	Battery

Heater & A/C Control Unit(Manual). Repair procedures

Replacement 1. Disconnect the negative (-) battery terminal. 2. Using the screwdriver, remove the side cover (A). 3. Loosen the mounting scre ...

Heater & A/C Control Unit(Dual). Repair procedures

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See also:

Inspection
1. Check signal waveform of Input & output speed sensor using the GDS. Specification: Refer to "Signal Wave Form" section. ...

Owner maintenance
The following lists are vehicle checks and inspections that should be performed by the owner or an authorized Kia dealer at the frequencies indicated to help ensure safe, dependable operation ...

Body Control Module (BCM). Components and Components Location
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