Kia Rio: Heater & A/C Control Unit (FATC) Components

Connector Pin Function

Connector	Pin No	Function	Connector	Pin No	Function
A	1	IGN 2	B	17	HI-SCAN (K-LINE)
	2	Rheostat (ILL-)		18	CAN (Low)
	3	Sensor Ground		19	CAN (High)
	4	Battery (+)		20	Ground
	5	Tail Lamp (+)		21	Temperature Actuator Feedback
	6	Blower Motor (+)		22	Mode Actuator Feedbac
	7	IGN 1		23	Intake Actuator Feedback
	8	Ground		24	Foot Actuator Feedback
B	1	Temperature Actuator (Cool)		25	Seat Warmer Signal (Low) - Driver
	2	Temperature Actuator (Warm)		26	Seat Warmer Signal (High) - Driver
	3	Mode Actuator (Vent)		27	Ionizer Signal
	4	Mode Actuator (Defog)		28	Clean Signal
	5	Intake Actuator (Fresh)		29	Diagnosis
	6	Intake Actuator (Recirculation)		30	-
	7	Foot Actuator (Open)		31	-
	8	Foot Actuator (Close)		32	Rear Defrost Switch (Low)
	9	-		33	HTD (Rear Defrost Indicator)
	10	-		34	Detent Out (+)
	11	-		35	Vref (+5V)
	12	Defog SCK		36	Photo Sensor (-)
	13	Defog Data		37	Evaporator Temperature Sensor (+)
	14	Defog Temperature		38	Ambient Temperature Sensor (+)
	15	Power Mosfet (Gate)		39	ECV IN
	16	Power Mosfet (Drain Feedback)		40	ECV OUT

1. Disconnect the negative (-) battery terminal. 2. Remove the heater & A/C controller (A) from the center facia using a flat-head scre ...

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