Kia Sorento: Heater & A/C Control Unit (Manual) Component

Connector Pin Function

Connector	Pin No	Function	Connector	Pin No	Function
A	1	Ground	B	18	IGN1
	2	Middle - High		19	Sesnor REF (+5V)
	3	Middle - Low		20	Evaporator Temperature Sensor (+)
	4	High		21	Ambient Temperature Sensor (+)
	5	Low		22	Rear Blower Common Signal
	6	-		23	Rear Blower Relay ON
B	1	Tail Lamp (ILL+)		24	HTD
	2	Battery		25	Rear Defog Switch
	3	Mode Control Actuator (Vent)		26	C_CAN (High)
	4	Mode Control Actuator (Defog)		27	C_CAN (Low)
	5	Temperature Control Actuator (Cool)		28	-
	6	Temperature Control Actuator (Warm)		29	ECV IN
	7	Intake Actuator (Fresh Air)		30	ECV OUT
	8	Intake Actuator (Recirculated Air)		31	Sensor Ground
	9	Hazard Select (Output)		32	Ground
	10	Rheo Detent	C	1	PTC ON Signal
	11	Mode Control Actuator Feedback		2	PTC Relay 2
	12	Temperature Control Actuator Feedback		3	PTC Relay 3
	13	Intake Actuator Feedback		4	-
	14	Blower Common Signal		5	-
	15	Blower Feedback Signal		6	-
	16	Rheostat (ILL-)		7	-
	17	IGN2		8	Ground

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1. Disconnect the negative (-) battery terminal. 2. Using a screwdriver or remover, remove the center fascia panel (A). ...

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