Hyundai Creta: Controller / Heater & A/C Control Unit (DATC)

Hyundai Creta GS 2014-2024 Service Manual / Heating, Ventilation and Air Conditioning / Controller / Heater & A/C Control Unit (DATC)

Components and components location

Components

Connector [A]

Pin NO	Function	Pin NO	Function
1	Battery (+)	21	IGN1
2	IGN2	22	ILL+ (TAIL)
3	Detent Out (-)	23	EVAP Sensor (+)
4	Sensor REF (+5V)	24	AMB Sensor (+)
5	Mode actuator feedback	25	-
6	Mode actuator (Vent)	26	Photo sensor (-)
7	Mode actuator (Defrost)	27	Blower motor (+)
8	Temperature actuator feedback	28	Power mosfet (Gate)
9	Temperature actuator (Cool)	29	Power mosfet (Drain feed back)
10	Temperature actuator (Warm)	30	HTD (Rear defog indicator)
11	Intake actuator feedback	31	Rear defog switch
12	Intake actuator (Fresh Air)	32	ADS Signal
13	Intake actuator (Recirculated Air)	33	-
14	Defogging actuator feedback	34	C_CAN High
15	Defogging actuator (Open)	35	C_CAN Low
16	Defogging actuator (Close)	36	ECV +
17	-	37	ECV- (Ground)
18	Cleean signal	38	ILL- (RHEO)
19	Ionizer diagnosis	39	Sensor ground
20	Ground	40	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
43	Defog door potentionmeter open or short
44	Defog door potentionmeter error
45	APT CAN Signal Error
47	RPM CAN Signal Error
48	Vehicle speed CAN Signal Error
49	Engine coolant temprature CAN Signal Error
50	Cluster ionizer fault
71	ECV Fault

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. Fix vent position, while selecting IG ON → OFF. Fix defrost position, while selecting floor purge.
5	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.
6	Intake door potentiometer	Open or Short	Fix FRE position, while selecting FRE mode. Fix REC position, while selecting REC mode.
7	Engine RPM	FFh or NO reception	Control with the value of 0 RPM
8	Vehicle speed	FFh or NO reception	Control with the value of 0 km/h
9	Engine coolant temperature	FFh or NO reception	Control with the value of - 2 °C(28.4 °F)
10	APS	FFh or NO reception	Control with the value of 0%
11	R-TQACNAPVC (Max Torque limitation of A/C Compressor)	FFh or NO reception	A/C OFF (Control with the value of 0 Nm)
12	R-PACNC (APT Sensor Output Value)	FFh or NO reception	A/C OFF (Control with the value of 0 hpa)
13	RLY-AC (Activation of air conditioner compressor relay)	FFh or NO reception	A/C OFF

Replacement

1.	Disconnect the negative (-) battery terminal.

2.	Remove the crash pad center panel. (Refer to Crash Pad - "Crach Pad Center Panel")

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

4.	Disconnect the connector (A) and the air hose (B).

Install in the reverse order of removal.

•	Make sure the connector are connected in properly.

•	Replace any damaged clips.

Heater & A/C Control Unit (Manual)

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