Kia Forte: Heating, Ventilation and Air Conditioning / Heater & A/C Control Unit (DATC)

Kia Forte 2019-2024 (BD) Service Manual / Heating, Ventilation and Air Conditioning / Heater & A/C Control Unit (DATC)

Components and components location

Components

[Connector A]

Pin NO	Function	Pin NO	Function
1	Battery (+)	17	IGN2
2	ISG B+	18	IGN1
3	ILL+ (TAIL)	19	Blower motor (+)
4	Sensor ground REF (+5V)	20	HTD (Rear defog indicator)
5	Mode control actuator (Feedback)	21	Rear defog switch
6	Driver's temperature control actuator (Feedback)	22	Photo sensor (-)_LH
7	Intake actuator (Feedback)	23	Photo sensor (-)_RH
8	EVAP sensor (+)	24	Detent out (-)
9	AMB sensor (+)	25	P_CAN High
10	Mode control actuator (Vent)	26	P_CAN Low
11	Mode control actuator (Def)	27	FET Drain (Feedback)
12	Driver's temperature control actuator (Cool)	28	FET (Gate)
13	Driver's temperature control actuator (Warm)	29	ECV +
14	Intake actuator (Recirculation)	30	ECV - (Ground)
15	Intake actuator (Feedback)	31	Sensor ground
16	ILL- (RHEO)	32	Ground

[Connector B]

Pin NO	Function	Pin NO	Function
1	Passenger's temperature control actuator (Feedback)	13	PAB On signal
2	Passenger's temperature control actuator (Cool)	14	PAB IGN1
3	Passenger's temperature control actuator (Warm)	15	PAB Off signal
4	Defogging actuator (Feedback)	16	Auto defogging sensor signal
5	Defogging actuator (On)	17	Rear SBR (LH)
6	Defogging actuator (Off)	18	SBR
7	-	19	Rear SBR (Center)
8	-	20	-
9	-	21	-
10	-	22	-
11	Blower relay	23	Rear SBR (RH)
12	Blower PWM	24	Ground

Repair procedures

Self Diagnosis

Self-diagnosis process.

•	When operating the self-diagnostics, the below fault (self-diagnostics code) will blink at 0.5 seconds interval on the temperature display settings (driver's side only) and the remaining symbols are OFF .

Fault code display

(1)	Continuance operation : DTC code.

(2)	Continuance operation : DTC code.

(3)	STEP operation. A. Nomal or one fault code is same as a continuance operation. B. DTC code.

If fault codes are displayed during the check, Inspect malfunction causes by referring to fault codes.

Display	Fail description
0	Normal
11	Incar sensor OPEN
12	Incar sensor SHORT
13	Ambient sensor OPEN
14	Ambient sensor SHORT
17	Evaporator sensor OPEN
18	Evaporator sensor SHORT
19	Driver temp door potentionmeter OPEN or SHORT
20	Driver temp door potentionmeter Error
21	Mode door potentionmeter OPEN or SHORT
22	Mode door potentionmeter Error
23	Auto defog sensor OPEN
24	Auto defog sensor SHORT
25	Intake door potentionmeter OPEN or SHORT
26	Intake door potentionmeter Error
32	Passenger temp door potensionmeter OPEN or SHORT
33	Passenger temp door potention meter Error
45	APT CAN Signal Error
47	RPM CAN Signal Error
48	Vehicle speed CAN Signal Error
49	Engine coolant temprature CAN Signal Error
71	ECV Fault (OPEN)

Fail safe

No	Item	Fault	Fail Safe
1	Incar sensor	Open or Short	Control with the value of 25°C(77.0°F)
2	Amblent sensor	Open or Short	Control with the value of 20°C(67°F)
3	Evaporator sensor	Open or Short	Control with the value of -2°C(28.4°F)
4	Mode door potentiometer	Open or Short	Fix vent position, while selecting vent mode. Fix defrost position, while selecting all except vent mode.
5	Temperature door potentiometer (MTC)	Open or Short	If temperature setting 1 - 7 step, fix at maximum cooling position. If temperature setting 8 - 15 step, fix at maximum heating position.
6	Temperature door potentiometer (DATC)	Open or Short	If temperature setting 17°C(62.6°F) - 24.5°C(76.1°F), fix at maximum cooling position. If temperature setting 25°C(77°F) - 32°C(89.6°F), fix at maximum heating position.
7	Intake door potentiometer	Open or Short	Fix vent position, while selecting vent mode. Fix defrost position, while selecting all except vent mode.
8	Engine RPM	FFh or NO reception	A/C OFF (Control with the value of 650 rpm)
9	Vehicle speed	FFh or NO reception	A/C OFF
10	Engine coolant temperature	FFh or NO reception	Control with the value of - 2°C(28.4°F)
11	APS	FFh or NO reception	Control with the value of 5%
12	R-TQACNAPVC (Max Torque limitation of A/C Compressor)	FFh or NO reception	A/C OFF (Control with the value of 0 Nm)
13	R-PACNC (APT Sensor Output Value)	FFh or NO reception	A/C OFF (Control with the value of 0 Nm)
14	RLY-AC (Activation of air conditioner compressor relay)	FFh or NO reception	FFh

Replacement

1.	Disconnect the negative (-) battery terminal.

2.	Remove the crash pad center garnish. (Refer to Body - "Crash Pad Center Garnish Assembly")

3.	Remove the center facia vent (A).

4.	Disconnect the center facia vent connector (A).

5.	After loosening the mounting screws, remove the A/C & heater controller unit (A).

6.	Disconnect the heater controller assembly hose (A).

7.	Disconnect the A/C & heater controller connectors (A).

To install, reverse the removal procedure.

•	Make sure the connector are connected in properly.

•	Replace any damaged clips.

Intake Actuator

Description and operation Description The intake actuator is located at the blower unit. It regulates the intake door by a signal from the control unit. Pressing the intake selection s ...

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