Hyundai Ioniq: Controller. Heater & A/C Control Unit (DATC) / Components and components location

Hyundai Ioniq (AE) 2017-2025 Service Manual / Heating, Ventilation and Air Conditioning / Controller. Heater & A/C Control Unit (DATC) / Components and components location

Components

Connector Pin Function

[Connector A]

Pin NO	Funtion	Pin NO	Funtion
1	Battery (+)	21	IGN1
2	-	22	IGN2
3	ILL+ (TAIL)	23	Blower PWM
4	Sensor REF (+5V)	24	Left Photo Sensor (-)
5	Driver Mode Control Actuator Feedback	25	Right Photo Sensor (-)
6	Driver Temperature Control Actuator Feedback	26	Blower Relay
7	Intake Actuator Feedback	27	Incar sensor (+)
8	Evaporator Temperature Sensor (+)	28	Incar motor (-)
9	Ambient Temperature Sensor (+)	29	-
10	Dirver Mode Control Actuator (VENT)	30	Detent out (-)
11	Dirver Mode Control Actuator (DEF)	31	-
12	Driver Temperature Control Actuator (COOL)	32	-
13	Driver Temperature Control Actuator (WARM)	33	P CAN HIGH
14	Intake Actuator (FRE)	34	P CAN LOW
15	Intake Actuator (REC)	35	Climate_CAN High
16	Passenger Temperature Control Actuator (COOL)	36	Climate_CAN Low
17	Passenger Temperature Control Actuator (WARM)	37	Interlock (+)_Ecomp
18	HTD (Rear Defrost)	38	Interlock (-)_Ecomp
19	Reae defogging switch	39	Sensor Ground
20	ILL - (RHEO)	40	Ground

[Connector B]

Pin NO	Funtion	Pin NO	Funtion
1	PTC Relay 1	17	PAB Off Signal
2	PTC Relay 2	18	Passenger Mode Control Actuator (Vent)
3	-	19	Passenger Mode Control Actuator (Defrost)
4	-	20	Passenger Mode Control Actuator Feedback
5	Auto Defogging Actuator (OPEN)	21	Duct Sensor (+)_Vent
6	Auto Defogging Actuator (CLOSE)	22	Duct Sensor (+)_Floor
7	-	23	-
8	-	24	-
9	-	25	Passenger Temperature Control Actuator Feedback
10	-	26	-
11	PAB IGN 1	27	-
12	ADS Signal	28	Auto Defogging Actuator Feedback
13	-	29	-
14	-	30	-
15	PAB On Signal	31	-
16	Ground	32	-

Controller. Heater & A/C Control Unit (DATC)

Repair procedures

Self Diagnosis1.Self-diagnosis process. • When operating the self-diagnostics, the below fault (self-diagnostics code) will blink at 0...

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