Heater/ac Control Unit: Other — Kia Forte I (2008-2013)

Heater/ac Control Unit: Other Kia Forte I

Connector Pin Function

Connector	Pin	Function	Connector	Pin	Function
Connector (A)	1	Battery	Connector (B)	1	MID HIGH
	2	Ig2		2	N.C
	3	Tail lamp		3	GND
	4	HTD (Rear Def indicator)		4	HIGH
	5	Intake actuator (Fre)		5	MID LOW
	6	Temp actuator (Warm)		6	LOW
	7	Intake actuator (Rec)
	8	Mode actuator (Vent)
	9	Blower Common
	10	Evaporator sensor
	11	PTC relay #2
	12	PTC relay #3
	13	PT CON signal (low)
	14	A/C select (high)
	15	A/C thermo (high)
	16	Rheostat
	17	Vref (5V)
	18	Mode actuator F/B
	19	Temp actuator F/B
	20	Intake actuator F/B
	21	Mode actuator (Def)
	22	Temp actuator (Cool)
	23	Blower select (low)
	24	Rear Def S/W (low)
	25	Sensor GND
	26	GND

HEATER & A/C CONTROL UNIT (MANUAL) CONNECTOR PIN FUNCTION CHART

Scheme 18

Scheme 18: Replacement

Scheme 19

Scheme 20

Scheme 21

Scheme 22

Disconnect the negative (-) battery terminal.
Remove the center air vent (A).
Loosen the mount screw and then remove the center fascia panel (A).
Disconnect the connector (A) and then remove the center fascia panel.
Remove the heater & A/C controller (A) from center fascia panel
Installation is the reverse order of removal.

Scheme 23

Scheme 23: Component

Connector	Pin	Function	Connector	Pin	Function
Connector (A)	1	IG2	Connector (B)	1	Vref (5V)
	2	Tail lamp		2	A/C select (high)
	3	Battery		3	Blower max signal
	4	Power mosfet (Gate)		4	Evaporator sensor
	5	Blower motor standard		5	Speed sensor
	6	PT CON signal (low)		6	Community (TX)
	7	Detent		7	N.C
	8	HTD (Rear Def indicator)		8	In-car sensor
	9	Temp actuator (Cool)		9	N.C
	10	Intake actuator (Fre)		10	Temp actuator F/B
	11	In-car motor (-)		11	Mode actuator F/B
	12	Rheostat		12	Ambient sensor
	13	GND		13	Sun sensor
	14	IG2		14	Water temp sensor
	15	Mode actuator (Def)		15	Intake actuator F/B
	16	Power mosfet (Drain)		16	Sensor GND
	17	A/C thermo (High)
	18	N.C
	19	PTC relay #2
	20	PTC relay #3
	21	Mode actuator (Vent)
	22	Temp actuator (warm)
	23	Intake actuator (Rec)
	24	Blower select (low)
	25	Rear DEF s/w (low)
	26	GND

HEATER & AC CONTROL UNIT (FULL AUTOMATIC) CONNECTOR PIN FUNCTION CHART

Scheme 24

Scheme 24: Self-diagnosis

Scheme 25

Scheme 26

Scheme 27

Self-diagnosis process The F.A.T.C. module self test feature will detect electrical malfunction and provide error codes for system components with suspected failures. NOTE: DTC data can be retrieved from the control panel directly or from the DLC using the Hi-Scan Pro.
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 SELF-DIAGNOSTIC FAULT CODE CHART Fault code Fail description Control unit DTC 00 - Normal 11 B1234 In-car temperature sensor open 12 B1233 In-car temperature sensor short 13 B1238 Ambient temperature sensor open 14 B1237 Ambient temperature sensor short 17 B1242 Evaporator temperature sensor open 18 B1241 Evaporator temperature sensor short 19 B1245 Temperature control actuator feed back open 19 B1246 Temperature control actuator feed back short 20 B2406 Temperature control actuator failure 21 B1249 Mode control actuator open 21 B1250 Mode control actuator short 22 B2409 Mode control actuator failure 25 B1208 Intake potentiometer open 25 B1209 Intake potentiometer short 26 B2408 Intake potentiometer failure
Fault code display Continuance operation : Normal or one fault code Continuance operation : DTC code is more than two Step operation Normal or one fault code is same a continuance DTC code is more two
If fault codes are displayed during the check, Inspect malfunction causes by referring to fault codes.
Fail safe In-car sensor : Control with the value of 23°C (73.4°F) Ambient temperature sensor: Control with the value of 20°C (67°F) Evaporator temperature sensor: Control with the value of -2°C (28.4°F) Temperature control actuator (Air mix potentiometer): If temperature setting LO-24.5°C, fix at maximum cooling position. If temperature setting 25°C-HI, fix at maximum heating position Mode control actuator (Direction potentiometer): Fix vent position, while selecting vent mode. Fix defrost position, while selecting all except vent mode. Intake control actuator: Fix fresh position, while selecting fresh mode. Fix recirculation position, while selecting recirculation mode.