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...

Other information:

Hyundai Ioniq (AE) 2017-2025 Service Manual: Special service tools

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Hyundai Ioniq (AE) 2017-2025 Service Manual: Photo Sensor. Description and operation

Description The photo sensor is located at the center of the defrost nozzles.The photo sensor contains a photovoltaic (sensitive to sunlight) diode. The solar radiation received by its light receiving portion, generates an electromotive force in proportion to the amount of radiation received which is transferred to the automatic temperature control module so that the solar radiation compensation will be performed...